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Cadmium Bioaccumulation and Toxicity in Tilapia Fish (Oreochromis niloticus  

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Full Text Available The present study was undertaken to determine the bioaccumulation of cadmium in livers of tilapia fish (Oreochromis niloticus and to assess the histological alteration of intestine, liver and kidney tissues due to cadmium toxicity. Fish (Oreochromis niloticus were exposed to cadmium at different concentrations (5 and 10 mg L-1 for 7 days. Cadmium assayed by using AA220FS atomic absorption spectrophotometry. The concentration of cadmium in the liver tissues in the fish exposed to 10 mg L-1 was found to be (9.09±0.51 ?g g -1 dry wt. while it was 5.17±0.25 ?g g-1 dry wt. in the fish exposed to 5 mg L-1. There was a significant increase of cadmium chloride concentration in the liver tissues of the fish exposed to 10 mg L-1 compared to the those exposed to 5 mg L-1. Histological alterations on liver tissues were in the form severe fatty vacuolations, generalised necrosis of hepatocytes, fatty change, congestion of liver sinusoids and central veins. Intestines showed severe congestion of submucosal blood vessels and sloughing of mucosal epithelium. Kidneys showed severe glumerular shrinkage and necrosis, lymphocytic infiltration in the distal renal convoluted tubules. Histopathological changes were more pronounced in fish exposed to 10 mg L-1 cadmium chloride.

Maha H. Elamin

2012-01-01

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Genetic structure and gene flow in an endangered native tilapia fish (Oreochromis esculentus) compared to invasive Nile tilapia (Oreochromis niloticus) in Yala swamp, East Africa  

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The introduction of invasive Nile tilapia (Oreochromis niloticus), and the rapacious predator Nile perch (Lates niloticus), into Lake Victoria resulted in a decline in population sizes, genetic diversity and even extirpation of native species which were previously the mainstay of local fisheries. However, remnant populations of native fish species, including tilapia, still persist in satellite lakes around Lake Victoria where they may coexist with O. niloticus. In this study we assessed popul...

Angienda, Paul O.; Lee, Hyuk Je; Elmer, Kathryn R.; Abila, Romulus; Waindi, Eliud N.; Meyer, Axel

2010-01-01

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EXTRACTION AND DETERMINATION OF COLLAGEN PEPTIDE AND ITS CLINICAL IMPORTANCE FROM TILAPIA FISH SCALES (OREOCHROMIS NILOTICUS  

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Full Text Available Tilapia are one of the most widely introduced fish globally that has clearly emerged as a very promising group in aquaculture. Oreochromis mossambicus was the first tilapia species to be taken up for large scale aquaculture, followed by Oreochromis niloticus, Oreochromis aureus and Tilapia rendalli. Today O. niloticus contributes more than 80% of tilapia aquaculture production globally. O. mossambicus was introduced in India as early as 1952 with a view to filling some unoccupied ecological niches, mainly pond aquaculture and reservoir fisheries. Tilapia fish scales found to have more percentage of Type I collagen. Fish collagen is complex structural protein that helps to maintain the strength and flexibility of skin, ligaments, bones, joints, muscles, tendons, gums, eyes, blood vessels, nails and hair. Collagen can be obtained from fish scales, fish skins by advanced enzymatic digestion methods in biotechnology. The Protein content of the above is more than 90% and having 18 kinds of amino acids out of which 7 are essential for human consumption. These products are easily absorbable and having high biological value promoting the absorption of vitamins and minerals. The enzymatic digestion technology process releases a lot of peptides in molecular collagen that helps humans in many physiological functions. Collagen has been used in biomedical pharmaceutical, food and cosmetic industries. In this paper we have determined the collagen extracted from Tilapia fish scales and also its clinical importance.

M.Hemanth kumar

2011-10-01

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In vivo Acute Toxicity Tests of Some Heavy Metals to Tilapia Fish (Oreochromis niloticus  

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Full Text Available Fingerlings tilapia fish (Oreochromis niloticus were exposed in laboratory conditions to a range of Copper (Cu, Cadmium (Cd, Lead (Pb and Zinc (Zn concentrations separately and the mortality rate were registered after 24, 48, 72 and 96 h. Median Lethal Concentrations (LC50s and Median Lethal Times (LT50s values were calculated by static bioassays for 24, 48, 72 and 96 h with the 95% fiducial limits through Probit analysis. LC50 and LT50 increased with the decrease in mean exposure times and concentrations, respectively. The LC50s for 96 h for Cu, Cd, Zn and Pb were 1093, 3751, 16177 and 1494 ?g L-1, respectively and the LT50s for maximum concentration used for Cu, Cd, Zn and Pb were 20.25, 11.48, 20.70 and 24.66 h, respectively. Metals bioconcentration in tilapia fish increases with exposure to increasing concentrations and Cu was the most toxic to tilapia fish, The toxicity ranking of the four heavy metals was Cu>Pb>Cd>Zn. Comparison of LC50 values for studied heavy metals for this species with those for other fishes reveals that tilapia fish (Oreochromis niloticus is equally or less sensitive to heavy metals than most other tested fishes.

M. Shuhaimi-Othman

2013-01-01

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Morphometric Differentiation of Two Nigerian Fish Species (Oreochromis niloticus and Lates niloticus Using Principal Components and Discriminant Analysis Diferenciación Morfométrica de Dos Especies de Peces Nigerianos (Oreochromis niloticus y Lates niloticus Utilizando Análisis de Componentes Principales y Análsis Discriminante  

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Full Text Available Morphological differences between two close fish populations were investigated in Doma Dam, north central Nigeria using principal component and discriminant analyses. The purpose was to identify the two species correctly and assign them into distinct genetic groups. To achieve this, seven morphometric measurements (body weight, standard length, total length, head length, body depth, dorsal fin length and caudal fin length were made on each of the studied 252 fish specimens (153 Oreochromis niloticus and 99 Lates niloticus. The analysis of variance showed that significantly (PLas diferencias morfológicas entre dos poblaciones de peces similares se han investigado en Doma Dam, centro-norte de Nigeria utilizando análisis de componentes principales y análisis discriminante. El propósito fue identificar correctamente las dos especies y asignarlas a los distintos grupos genéticos. Para lograr esto, siete medidas morfométricas (peso corporal, longitud estándar, longitud total, longitud de la cabeza, profundidad del cuerpo, longitud de la aleta dorsal y la longitud de la aleta caudal se realizaron en cada una de las muestras de los 252 peces estudiados (153 Oreochromis niloticus y 99 Lates niloticus . El análisis de varianza mostró que de forma significativa (p<0,05 los valores más altos se registraron en Lates niloticus, en todos los rasgos del cuerpo examinado con excepción de la longitud de la aleta dorsal. A partir del análisis de componentes principales, las diferencias entre las especies se observó principalmente en la longitud de la aleta dorsal, el peso corporal, la longitud de la aleta caudal y longitud de la cabeza. El análisis discriminante reveló que la longitud estándar, longitud aleta dorsal y caudal son las tres variables más discriminatorias de utilidad para distinguir claramente las dos especies en la edad madura. Estas tres variables con fuerte poder de discriminación clasificaron correctamente el 98,0% de los individuos de la muestra de las poblaciones conocidas de peces. La exactitud de la clasificación fue sometida a una validación cruzada utilizando el método de la muestra dividida, la que indicó una tasa de éxito del 97,6% (98,0% de Oreochromis niloticus y 97,0% de Lates niloticus asignados correctamente. Los resultados pueden proporcionar una base científica sólida para el manejo eficaz y la explotación sostenible de los recursos genéticos de las dos especies en condiciones subtropicales.

A Yakubu

2011-12-01

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Biochemical Effects of Short-term Cadmium Exposure on the Freshwater Fish, Oreochromis niloticus  

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Full Text Available The influences of cadmium, a well known environmental pollutant, on different biochemical parameters in fresh water fish, Oreochromis niloticus exposed to sublethal concentration of 9.3 ppm, 0.5 of 96 h LC50, for 1, 4 and 7 days were investigated. Significant increases in the levels of blood glucose and the activities of glutamic pyruvic acid transaminase, glutamic oxaloacetic acid transaminase and alkaline phosphatase were observed in the fish treated with cadmium during all experimental periods. The levels of blood triglycerides and total protein were statistically elevated at second and last periods. Insignificant alterations in the levels of blood cholesterol were noted. The observed hyperglycaemia induced by cadmium might be explained in part by increasing rate of glycogenolysis or gluconeogenesis. The observed hypertriglyceridaemia and the elevations of glutamic pyruvic acid transaminase, glutamic oxaloacetic acid transaminase and alkaline phosphatase may be due to liver dysfunction. The observed hyperproteinaemia in the fish, Oreochromis niloticus following cadmium administration is possibly attribute to disorder of protein metabolism. However, the significance of the toxic effects of sublethal concentration of cadmium on the various biochemical parameters studied is discussed.

Atef M. Al-Attar

2005-01-01

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Effects of fish size on the response of antioxidant systems of Oreochromis niloticus following metal exposures.  

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The size of a fish is an important factor in its physiology, and metal uptake is affected by animal physiology. In this study, small and large tilapias (Oreochromis niloticus) differing approximately twofold in length and fivefold in weight were compared for their antioxidant response. Both groups were exposed to Cu or Cr (1.0 ?g/mL) in a freshwater (-80 mg CaCO3/L, conductivity 1.77 mS/cm) using 2 exposure protocols (20 ?M for 48 h and 10 ?M for 6 days). Following the exposures, the antioxidant enzyme activities (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase, GPX; glutathione reductase, GR and glutathione S-transferase, GST) and glutathione (GSH) levels were measured in the liver of fish. Results showed that small fish was affected from exposure conditions much more than large ones as their antioxidant parameters significantly decreased even in controls. Metal exposures of small fish caused significant increases in SOD and CAT activity in acute Cu or Cr exposures. Subchronic Cr exposure of small fish also caused significant increases in CAT, GPx and GST activities, while there was no significant change in Cu-exposed ones. Large fish, however, showed different antioxidant responses as their levels mostly decreased. This study demonstrated that the response of antioxidant system in the liver of tilapia varied in relation to fish sizes and emphasized using different size groups in environmental monitoring and also in evaluation of fish biomarkers. PMID:24402083

Kanak, E G; Dogan, Z; Eroglu, A; Atli, G; Canli, M

2014-08-01

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Toxicity of aqueous bark extract of the tree Balanites aegyptiaca on the fish Oreochromis niloticus.  

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The toxicity of an aqueous extract of Balanites aegyptiaca on Oreochromis niloticus was investigated. Fry of the fish were exposed to acute and sublethal concentrations of the extract in 96-h and 56-d static bioassays, respectively. Susceptibility of the extract on freshwater snail, Biomphalaria pfeifferi, was tested. The LC50 of the lethal concentrations of the extract on the fish and the snails were 1.12 mg/l-1 and 2.0 mg/l-1 respectively, while the effects of the sublethal concentrations on the growth rate and haematocrit percentage of the fish were determined. Signs of toxicosis such as air gulping, reduction in tailfin beating rate and overturning were observed in the fish before death occurred. The toxicant also reduced the growth rate and haematocrit percentage of the fish. The mode of action of the toxicant seems to be haemolytic or an impairment of osmoregulation in the blood leading to an over-dilution of the blood. PMID:8334460

Okwuosa, V N; Molta, B S; Ebele, S

1993-05-01

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Induction of micronucleus and nuclear alterations in fish (Oreochromis niloticus) by a petroleum refinery effluent.  

Science.gov (United States)

In this study, micronucleus and nuclear alterations tests were performed on erythrocytes of Oreochromis niloticus (Perciformes, Cichlidae) in order to evaluate the water quality of the Atibaia river, in an area that receives effluents discharge of a petroleum refinery and also to evaluate the effectiveness of the treatments used by the refinery. Water samples were collected in five different sites related with a refinery from São Paulo State, Brazil. For the micronucleus and nuclear alterations tests, O. niloticus specimens were exposed for 72 h to the water samples and in pure ground water (negative control). The results herein obtained indicated that the treatments used by the refinery diminished the cytogenetic damage; however they were not fully effective, since the final mill has induced damages in the genetic material of the test organism. PMID:18692593

Hoshina, Márcia M; de Franceschi de Angelis, Dejanira; Marin-Morales, Maria A

2008-10-30

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FISH in micronucleus test demonstrates aneugenic action of rotenone in a common freshwater fish species, Nile tilapia (Oreochromis niloticus).  

Science.gov (United States)

Aneuploidies are numerical genetic alterations that lead to changes in the normal number of chromosomes due to abnormal segregation during cell division. This type of alteration can occur spontaneously or as a result of exposure to mutagenic agents. The presence of these agents in the environment has increased concern about potential damage to human health. Rotenone, derived from plants of the genera Derris and Lonchocarpus, is a product that is used all over the world as a pesticide and piscicide. Before establishing its potential and efficiency for these purposes, it is essential to know more about the possible adverse effects that it may cause. The current work aimed to evaluate the mutagenic potential of rotenone using fish from the species Oreochromis niloticus, as well as to help in understanding its action mechanism. Our results showed the mutagenic potential of rotenone evidenced by increased formation of micronuclei and nuclear buds at low doses of exposure. The use of fluorescence in situ hybridisation technique made it possible to measure the aneugenic potential of the substance, probably due to its impairment of mitotic spindle formation. PMID:24618992

Melo, Karina M; Grisolia, Cesar K; Pieczarka, Julio C; de Souza, Ludmilla R; Filho, José de Souza; Nagamachi, Cleusa Y

2014-05-01

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Manganese Neurotoxicity in Oreochromis niloticus  

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Full Text Available Manganese is not an acutely hazardous environmental contaminant at low levels, but increased dose produces serious degenerative disorders in Oreochromis niloticus. Sublethal exposure of fry to 2000 mg/L manganese chloride for eight days displays evidences of poisoning, and hard hit is the brain. Light microscopy shows appearance of gaps between brain layers and cell destruction. Electron microscopy shows damage to subcellular structures.

Annabelle Herrera

1992-06-01

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Effects of low dietary levels of saponins on two common culture fish - common carp (Cyprinus carpio L.) and Nile tilapia (Oreochromis niloticus (L.))  

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Saponins are a group of compounds present in many wild plants and cultivated crops and are commonly found in traditional medicinal preparations. Feeding experiments using saponin-supplemented (commercial Quillaja saponin) feeds were conducted in two commonly cultured fish species, namely common carp (Cyprinus carpio L.) and tilapia (Oreochromis niloticus (L.)). Quillaja saponins (QS) at dietary levels of 150 mg kg-1 and 300 mg kg-1 significantly increased body weight gain in common car...

Francis, George

2001-01-01

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Analysis of Heavy Metal Concentrations in Tilapia Fish (Oreochromis niloticus) From Four Selected Markets in Selangor, Peninsular Malaysia  

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Concentrations of cadmium (Cd), zinc (Zn), lead (Pb), nickel (Ni) and cobalt (Co) were measured in various organs (such as in liver, gill and muscle) of Tilapia fish (Oreochromis niloticus) which were collected from Serdang night market, Bangi night and wet markets and Kajang wet market, in Selangor, Peninsular Malaysia. The concentration of metals was measured by inductively-coupled plasma mass spectrometry (ICP-MS). The levels of metal varied as it depended on various tissues. Zinc w...

Taweel, Abdulali K. A.; Shuhaimi-othman, M.; Ahmad, A. K.

2012-01-01

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In vivo Acute Toxicity Tests of Some Heavy Metals to Tilapia Fish (Oreochromis niloticus)  

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Fingerlings tilapia fish (Oreochromis niloticus) were exposed in laboratory conditions to a range of Copper (Cu), Cadmium (Cd), Lead (Pb) and Zinc (Zn) concentrations separately and the mortality rate were registered after 24, 48, 72 and 96 h. Median Lethal Concentrations (LC50s) and Median Lethal Times (LT50s) values were calculated by static bioassays for 24, 48, 72 and 96 h with the 95% fiducial limits through Probit analysis. LC50 and LT50

Abdulali Taweel; Shuhaimi-othman, M.; Ahmad, A. K.

2013-01-01

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Fishborne trematodes in cultured Nile tilapia (Oreochromis niloticus) and wild-caught fish from Thailand  

DEFF Research Database (Denmark)

Fish-borne zoonotic trematode (FZT) infections affect the health of more than 18 million people around the world, particularly in Asian countries. Nile tilapia (Oreochromis niloticus) is a white meat fish that has an increasing national and international market. The objective of this study was to determine the prevalence of FZT metacercarial infections in Nile tilapia from cage and pond aquaculture systems and in wild-caught fish from Suphan Buri, Nakhon Pathom and Chachoengsao provinces, Thailand. Fish were collected from four cages in Suphan Buri and four ponds in Nakhon Pathom provinces between September-October 2011 and April-May 2012 and wild-caught fish were collected in May 2012. All fish were examined for metacercariae by a pepsin digestion and metacercariae identified using morphological and molecular methods. During the first sampling of tilapia the prevalence of metacercariae in cage culture fish were 2.5% and 10% in pond culture fish. During the second sampling, metacercariae was found in 2.0% of tilapia from cage and none from the ponds. Of the 150 wild-caught fish, a total of 80 (53.3%) were found to be infected with metacercariae, mostly the zoonotic species Stellantchasmus falcatus, Haplorchis pumilio and Procerovum varium. The results revealed a low risk for FZT in Nile tilapia cultured in cage and pond aquaculture systems. However, the high prevalence of FZT in wild-caught fish indicates a high potential for spillover from wild reservoir hosts and underscores the need for vigilance and good management practices by the aquaculture sector. Crown Copyright © 2013.

Wiriya, Benjamaporn; Clausen, Jesper Hedegaard

2013-01-01

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Changes in Haematological Parameters of the Fish, Oreochromis niloticus Treated with Sublethal Concentration of Cadmium  

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The sub-chronic and chronic exposure of Tilapia, Oreochromis niloticus to sublethal concentration of 5. 5 ppm cadmium (0. 3 of 96 h LC50) for 1, 3 and 5 weeks was studied. Exposure of Tilapia to cadmium resulted into a number of haematological alterations. Erythropenia, a marked decrease in values of haemoglobin content, haematocrit and mean corpuscular haemoglobin were observed at all experimental periods of cadmium exposure. The values of mean cell volume were decreased at...

Al-attar, Atef M.

2005-01-01

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Partial replacement of fish meal with Azola meal in diets for Nile tilapia (Oreochromis niloticus L.) affects growth and whole body fatty acid composition  

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The replacement of fishmeal (FM) with Azolla meal (AM) in diets on growth and fatty acid in Nile tilapia, Oreochromis niloticus (initial mean weight: 16.4 g) was studied. Fish were fed with six isonitrogenous (29.2% CP) and isoenergetic (16.9 kJ.g-1) diets containing 0%, 10%, 20%, 30%, 40% and 50% AM respectively, as partial FM substitute. Diet A0 acted as a control. The final weight (51.0-88.3 g), the weight gain (210.8-438.3%) and the SGR (1.3-1.9%day-1) decreased when AM level higher th...

Abou, Youssouf; Adite, Alphonse; Ibikounle, Moudachirou; Beckers, Yves; Emile, Fiogbe; Micha, Jean-claude

2011-01-01

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Heavy metal accumulation in lake sediments, fish (Oreochromis niloticus and Serranochromis thumbergi), and crayfish (Cherax quadricarinatus) in Lake Itezhi-tezhi and Lake Kariba, Zambia.  

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We measured the level of heavy metal accumulation in lake sediments, herbivorous (Oreochromis niloticus) and carnivorous (Serranochromis thumbergi) fish, and crayfish (Cherax quadricarinatus) from Lake Itezhi-tezhi (ITT) and Lake Kariba. We used atomic absorption spectrophotometry to quantify the levels of seven heavy metals (Cr, Co, Cu, Zn, Cd, Pb, and Ni). The sediment and the herbivorous fish O. niloticus accumulated a very high concentration of Cu in Lake ITT, most likely due to the discharge of Cu waste from a mining area 450 km upstream. The aquatic species we sampled in Lake Kariba had higher concentrations of Cr, Ni, and Pb relative to those in Lake ITT. This is most likely due to anthropogenic activities, such as the use of leaded petrol and antifouling agents in marine paints. Interestingly, we observed a negative correlation between the coefficient of condition (K) and Ni concentration in the crayfish hepatopancreas. Both O. niloticus and the crayfish had much higher biota-sediment accumulation factors (BSAF) for Cu, Zn, and Cd relative to Cr, Co, Pb, and Ni. The rank of BSAF values for O. niloticus (Cu>Cd>Zn) and C. quadricarinatus (Zn>Cd>Cu) differed from the expected ranks based on the general order of affinity of metals (Cd>Zn>Cu). PMID:20162262

Nakayama, Shouta M M; Ikenaka, Yoshinori; Muzandu, Kaampwe; Choongo, Kennedy; Oroszlany, Balazs; Teraoka, Hiroki; Mizuno, Naoharu; Ishizuka, Mayumi

2010-08-01

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Digestibilidad aparente de los ensilajes de residuos pesqueros en tilapias rojas (Oreochromis mossambicus x O. niloticus) / Apparent digestibility of fishing waste silage in red tilapia (Oreochromis mossambicus x O. niloticus)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish Mediante un diseño completamente aleatorizado con tres repeticiones, se determinó la digestibilidad in vivo de nutrientes y energía de los ensilajes de residuos pesqueros en tilapias rojas (Oreochromis mossambicus x O. niloticus). El ensilaje químico se preparo con ácido sulfúrico 98% (20 ml/kg) y á [...] cido fórmico (10 ml/kg) y el ensilaje biológico con miel de caña (150 g/kg) y yogurt (Lactobacilus bulgaris y streptococcus acidophilus; 30 g/kg). Se usó oxido crómico como indicador y las heces se recolectaron por un sifón desde el fondo de los tanques. Se obtuvo que la digestibilidad aparente de algunos nutrientes difirió en función del tipo de ensilaje, entre tanto la proteína digestible fue mayor para el ensilaje químico y la materia seca, calcio y fósforo para el ensilaje biológico. Digestibilidades iguales (P>0,05) se presentó para los lípidos, cenizas y energía. Concluyendoque los ensilajes de residuos pesqueros presentan alto valor nutricional, lo que constituyen una fuente de proteína alternativa en la formulación de raciones para tilapias rojas. Abstract in english By means of a design completely randomized with three repetitions, in vivo digestibility of nutrients and energy in fishing waste silages were determined for red tilapia (Oreochromis mossambicus x O. niloticus). Chemical silage prepared with sulphuric acid 98 % (20 ml/kg) and formic acid (10 ml/kg) [...] and the biological with sugar cane molasses (150 g/kg) and of yogurt (Lactobacilus bulgaris and streptococcus acidophilus; 30 g/kg). The chromic oxide was used as inert indicator and fecal sample were recollected by siphon from the bottom of tanks. As a result, the apparent digestibility of some nutrients differed from silage type; meanwhile protein was bigger for the chemical silage and the dry matter, calcium and phosphorus for the biological silage. Similar digestibility (P>0,05) was presented for lipids, ashes and energy. In conclusion, all this showed that the fishing waste silages present high nutritional value, that constitute an alternative- protein source in the formulation of rations for red tilapias.

José E, Llanes; Aliro, Bórquez; José, Toledo; José M, Lazo de la Vega.

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Benzo(a)pyrene induces hepatic AKR1A1 mRNA expression in tilapia fish (Oreochromis niloticus).  

Science.gov (United States)

AKR1A1 or aldehyde reductase is a member of the aldo-keto reductases superfamily that is evolutionarily conserved among species. AKR1A1 is one of the five AKRs (AKR1A1 and 1C1-1C4) implicated in the metabolic benzo(a)pyrene (BaP) activation to reactive BaP 7,8-dione. BaP is a polycyclic aromatic hydrocarbon (PAH) widely distributed in aquatic ecosystems and its metabolic activation is necessary to produce its toxic effects. Although the presence of AKR1A1 in fish has been reported, its tissue distribution in tilapia (Oreochromis niloticus) and AKR1A1 inducibility by BaP are not known yet. Moreover, cytochrome P4501A (CYP1A) mRNA expression in fish has been used as a PAH biomarker of effect. Therefore, BaP effects on AKR1A1 and CYP1A gene expressions in tilapia, a species of commercial interest, were investigated by real-time RT-PCR. A partial AKR1A1 cDNA was identified, sequenced and compared with AKR1A1 reported sequences in the GenBank DNA database. Constitutive AKR1A1 mRNA expression was detected mainly in liver, similarly to that of CYP1A. BaP exposure resulted in statistically significant AKR1A1 and CYP1A mRNA induction in liver (20- and 120-fold, respectively) at 24 h. On the other hand, ethoxyquin (EQ) was used as control inducer for AKR1A1 mRNA. Interestingly, EQ also induced CYP1A mRNA levels in tilapia liver. Our results suggest that teleost AKR1A1, in addition to CYP1A, are inducible by BaP. The mechanism of AKR1A1 induction by BaP and its role in fish susceptibility to BaP toxic effects remains to be elucidated. PMID:22394341

Osorio-Yáñez, Citlalli; García-Tavera, José Luis; Pérez-Núñez, Maria Teresa; Poblete-Naredo, Irais; Muñoz, Balam; Barron-Vivanco, Briscia S; Rothenberg, Stephen J; Zapata-Pérez, Omar; Albores, Arnulfo

2012-07-01

 
 
 
 
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Karyotype Analysis of the Hybrid, Thai Red Tilapia (Oreochromis niloticus Linn. X Oreochromis mossambicus Linn.  

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Full Text Available Thai Red Tilapia is the hybrid fish between Oreochromis niloticus Linn. and O. mossambicus Linn. The chromosomal constitution of this hybrid were investigated using high quality metaphase preparations obtained from their bone marrow. The diploid chromosome of Tilapias consisted of 22 chromosome pairs (2n = 44. However, the morphology of their chromosome types were different. The karyotype of O. niloticus consisted of 18 subtelocentric (st, 26 acrocentric (a whereas 6 submetacentric (sm, 10 st, 28 a and 2 sm 6 st, 36 a were observed in O. mossambicus and Thai Red Tilapia respectively. The arm number of O. niloticus, O. mossambicus and Thai Red Tilapia were 62, 60 and 52 respectively. The heterochromatic of the short arms of all Tilapias were also observed. The karyotypic differences between O. niloticus, O. mossambicus and the hybrid, Thai Red Tilapia will be useful for strain classification and the improvement of commercial Tilapias production.

Jiradej Manosroi

2003-01-01

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Irradiated Palm Oil Waste (Sludge) As Feed Supplement For Nila Gift Fish (Oreochromis niloticus)  

International Nuclear Information System (INIS)

The objective of the experiment was to study the fish weight development after being fed with irradiated palm oil waste pellet. Irradiated Palm oil waste pellet was produced from palm oil waste (sludge) with some additional materials, i.e. rice bran, fish powder, soybean powder, tapioca powder. The mixture was then irradiated with a dose of 4 kGy to decontaminate pathogen microbe and other contaminant microbes, the experiment have been carried out in 4 treatments. Treatment A was male fish which was being fed with irradiated sludge palm oil waste pellet and commercial pelletized feed (2:1), treatment C was female with the same feed as A, treatment B was male fish feed with commercial pelletized, treatment D was female fish with the same feed as B. Each treatment was placed in a pond. The feed with the amount of 3% of total body weight was given to the fishes 2 times per day. The result of this experiment showed that the male fish weight receiving treatment A and B were 195.37 g and 175.12 g. The female fish weight at treatments C and D were 170.28 g and 160.15 g, respectively. Data obtained from this experiment showed that the treatment of irradiated sludge palm oil waste pellet and commercial pelletized (2:1) were more efficient as fish feeding compared to commercial pellets

2001-11-06

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Effects of Water Pollution in Lake Mariut on Gonadal Free Amino Acid Compositions in Oreochromis niloticus Fish  

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Full Text Available In the present report, we have determined the gonadal free amino acid compositions in Oreochromis niloticus collected from three sites in Lake Mariut: SE basin (less polluted, main basin (moderately polluted and SW basin (highly polluted, in an attempt to develop sensitive biomarker to evaluate pollution effects from multiple sources. Variations of free amino acids (FAAs were apparent in the polluted sites; total FAAs in testes and ovaries exhibited significant increases as compared to the less polluted site. This increase was attributed to increases in all individual amino acids including essential and non-essential ones. ANOVA indicated significant changes in all testicular FAAs, excluding phenylalanine. Levels of non-essential amino acids showed obvious alterations in ovaries. However, the increase in most essential amino acids, although insignificant, yet it was quite observable. In addition, the ratio of essential to non-essential amino acids was insignificantly decreased in gonads. This may be indicative of changes in protein metabolism.

Cecil A. Matta

2007-01-01

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Resistência a antimicrobianos de bactérias oriundas de ambiente de criação e filés de tilápias do nilo (Oreochromis niloticus) / Antibacterial resistance in bacteria from fish pond and Nile tilapia fillets (Oreochromis niloticus)  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese A resistência de bactérias a antimicrobianos foi determinada em uma piscicultura de tilápias (Oreochromis niloticus) em tanques de terra, sem utilização de antibióticos para profilaxia ou controle de doenças. Foi selecionado um tanque, capturados peixes e coletadas amostras de conteúdo intestinal e [...] superfície dos peixes, água de abastecimento e do tanque, ração, filés de tilápias frescos e congelados. Colônias representativas foram selecionadas e analisadas pelos testes de Gram, catalase, oxidase e oxidaçãofermentação. Foram selecionadas 89 amostras e submetidas a antibiograma, utilizando vários antimicrobianos. A maioria das bactérias pertenceu às famílias Enterobacteriaceae e Vibrionaceae. Tanto no ambiente de criação como nos filés de tilápias observou-se que os isolados bacterianos apresentaramse resistentes principalmente a ampicilina e eritromicina. O índice de múltipla resistência a antimicrobianos (MAR) foi calculado, sendo que do total de 89 isolados analisados 74 (83%), apresentaram MAR ³ 0,2, ou seja apresentaram-se resistentes a dois ou mais antimicrobianos. As freqüências de índice MAR foram altas e maiores na ração. Abstract in english This study was conducted in a freshwater tilapia farm that has not used any antibiotic. It was selected one pond, caught 15 fishes and collected samples of intestinal content and mucus surface, water influent and pond water, ration, fresh tilapia fillets and frozen fillets.. Phenotypical characteris [...] tics, Gram stain, oxidase production, oxidative-fermentative utilization of glucose (O-F) were determined of representative colony. Were selected 89 strains and submitted for antimicrobial sensitivy test using several antibiotics. The major identified bacterial families were belonged Enterobacteriaceae and Vibrionaceae. The most isolates showed resistance to ampicilin and eritromicin. From the 89 isolates evaluated 74 (83%) showed a multiple antibiotic resistance index (MAR) ³ 0.2, that mean resistance to two or more antibiotics. The MAR índice frequency were higher and bigger in the rations.

Rejeana Márcia Santos, Lima; Henrique César Pereira, Figueiredo; Flaviane Castro de, Faria; Roberta Hilsdorf, Picolli; Júlio Silvio de Sousa, Bueno Filho; Priscila Vieira Rosa, Logato.

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Partial molecular characterization of the Nile tilapia (Oreochromis niloticus) alpha-cardiac muscle actin gene and its relationship to actin isoforms of other fish species  

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Full Text Available SciELO Brazil | Language: English Abstract in english An alpha actin gene segment, isolated from Nile tilapia (Oreochromis niloticus), was characterized by nucleotide sequencing, predicted amino acid sequence and Southern blot hybridization. Genomic DNA amplification resulted in a 1063-bp fragment corresponding to a partial alpha-cardiac muscle actin g [...] ene containing exons 3 to 6. Southern blot analysis of the restriction-digested DNA revealed that the Nile tilapia genome contains multiple muscle actin isoforms. Although comparison of the nucleotide sequence, amino acid residues and exon-intron organization of the isolated actin gene with those of other vertebrates showed a high level of identity, diagnostic amino acid residues can still be correlated to distinct actin genes in fish species.

Adriane P., Wasko; Fábio E., Severino; Flávia T., Presti; Andréia B., Poletto; Cesar, Martins.

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Sub-lethal concentrations of monocrotophos affect aggressive behavior of the fishes Astyanax altiparanae Garutti & Britski (Teleostei, Characidae and Oreochromis niloticus (Linnaeus (Teleostei, Cichlidae  

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Full Text Available This study investigated the effects of sublethal concentrations of the pesticide monocrotophos (organophosphate on the agonistic behavior of two fishes species, Astyanax altiparanae Garutti & Britski, 2000 (lambari and Oreochromis niloticus (Linnaeus, 1758 (Nile tilapia. Sublethal concentrations of the pesticide for the two species were determined and lambari was more resistant than Nile tilapia. The sublethal concentrations were smaller than 400 mgl-1 for lambari and 20 mgl-1 for Nile tilapia. The two species were tested in grouping conditions (triads and isolation, under monocrotophos concentrations of 200 mgl-1 for lambari and 5 mgl-1 for Nile tilapia. The concentration decreased the aggressiveness in lambari, but in Nile tilapia an opposite effect was detected. The results show a species-specific effect of the monocrotophoson aggression.

André Luis da Cruz

2002-12-01

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Organic matter sedimentation and resuspension in Tilapia (Oreochromis niloticus) fish ponds during a growing cycle  

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The rates of sedimentation and resuspension of organic carbon and total nitrogen were measured in earthen fishponds, based on nutrient input, water quality parameters and fish size and biomass. Material collected in sediment traps and soil samples were analyzed for organic carbon, total nitrogen, iron and aluminum concentrations. A dilution analysis method was used to differentiate between sedimented and resuspended particles. The rates of sedimentation and resuspension estimated from total s...

Jimenez-montealegre, R.; Verdegem, M. C. J.; Zamora, J. E.; Verreth, J. A. J.

2002-01-01

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Selection for growth of Nile tilapia (Oreochromis niloticus L.) in low-input environments  

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Nile tilapia,Oreochromis niloticus,is one of the most important species farmed in the world and is the mainstay of many resource-poor fish farmers. The majority of its culturing is carried out in semi-intensive systems with a wide array of pond inputs from the farm. These systems are characterized by poor fish growth a...

Charo-karisa, H.

2006-01-01

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Ascending general visceral sensory pathways from the brainstem to the forebrain in a cichlid fish, Oreochromis (Tilapia) niloticus.  

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Fiber connections of the general visceral sensory centers in the brainstem were studied with tract-tracing methods in a percomorph teleost, tilapia Oreochromis niloticus. General visceral afferents of the vagal nerve from abdominal viscera terminated bilaterally in the commissural nucleus of Cajal (NCC) and area postrema (AP). The NCC and AP projected bilaterally to the secondary general visceral nucleus (SVN), four diencephalic nuclei (the preglomerular general visceral nucleus [pVN], nucleus of the lateral recess, posterior thalamic nucleus, and lateral tuberal area), preoptic area, and ventral telencephalon (supracommissural, dorsal, and ventral parts) in addition to the glossopharyngeal and vagal lobes and medullary reticular formation. Injections to the SVN resulted in labeled terminals in the forebrain structures that receive fibers from the primary centers and additionally in the diffuse nucleus of the inferior lobe, lateral torus, and inferior subdivision of lateral torus. The present study suggests that the ascending general visceral projections arising from the brainstem centers in teleosts are quite similar to those in mammals and birds. Descending pathways were also notable. In addition to descending projections from the SVN and medullary structures to the primary centers, long descending pathways to the SVN, NCC, and AP were found to originate from the pVN, nucleus of the lateral recess, posterior thalamic nucleus, and preoptic area. The SVN was found to receive fibers from the ventral telencephalon as well. Therefore, the present study indicates that most of the general visceral structures in the forebrain are reciprocally connected with the brainstem centers. PMID:20593359

Yoshimoto, Masami; Yamamoto, Naoyuki

2010-09-01

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Expression characterization and promoter activity analysis of the tilapia (Oreochromis niloticus) myosin light chain 3 promoter in skeletal muscle of fish.  

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A tilapia (Oreochromis niloticus) myosin light chain 3 (Mlc3) promoter region (~4.3 kb) was isolated and characterized. Sequence analysis of the clone revealed high similarity with a tilapia gene encoding the Mlc3 promoter region, exon 1, and intron 1. The clone contained several putative binding sequences for transcription factors, including MEF-2, MYOG, MyoD, PKNOX1, and AREB6. Deletion of a region of the tilapia Mlc3 promoter (801 to -3,881 bp) enhanced promoter activity, as determined by direct injection of a luciferase reporter construct into skeletal muscle of Archocentrus nigrofasciatus. These findings suggest that the region between -801 and -3,881 bp may contain negative regulatory elements. Stable germline transgenic strains of the ornamental fish species A. nigrofasciatus var. carrying the Taiwan coral red fluorescent protein (TcRFP) driven by the Mlc3 promoter were established. F1 adult transgenic A. nigrofasciatus var. exhibited brilliant pink fluorescence in skeletal muscles in the daylight. Therefore, our current study demonstrates the feasibility of using the tilapia Mlc3 promoter to drive fluorescence in new fish species, such as Perciformes. PMID:24146265

Lin, Yu-Ho; Peng, Kuan-Chieh; Pan, Chieh-Yu; Wen, Zhi-Hong; Chen, Jyh-Yih

2014-02-01

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Ultrastructure and distribution of the taste buds in the buccal cavity in relation to the food and feeding habit of a herbivorous fish: Oreochromis niloticus.  

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The buccal cavity of an herbivorous fish Oreochromis niloticus was investigated by means of scanning electron microscopy. The buccal cavity distinguished into the roof and the floor. Three different types of taste buds (type I, II and III) are distributed in the buccal cavity. The proximal part of the buccal cavity bears relatively high epidermal papillae in which type I TBs was found. The middle region of the buccal cavity is mostly occupied by low epidermal papillae containing type II TBs. Type III TBs which are present within the metabranchial buccal cavity; never rise above the normal level of the epithelium. The different types of TBs are useful for ensuring full utilization of the gustatory ability of the fish. It is postulated that the TBs serve different functions: TBs type I and II may act as chemoreceptors and mechanoreceptors. TBs type III acts predominantly as a chemoreceptors. TBs of each type show two kinds of receptor villi within their receptor areas: tall villi and small villi. The surface of the lining epithelial cells shows a delicate microridge system. These structures protect against physical abrasion potentially caused during food maneuvering and swallowing. Furthermore, protection of the epithelium from abrasion is enhanced with goblet cells secretion. PMID:22440511

Elsheikh, E H; Nasr, E S; Gamal, A M

2012-06-01

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Active biomonitoring of trace heavy metals using fish ( Oreochromis niloticus) as bioindicator species. The case of Nakivubo wetland along Lake Victoria  

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The Nakivubo wetland in Uganda, which feeds Lake Victoria at Murchison bay, has become severely degraded over recent years and is particularly threatened by the expansion of industry, settlement and cultivation on its fertile fringes. The aim of this study was to actively biomonitor selected trace heavy metals using Nile tilapia ( Oreochromis niloticus). Nile tilapia was set in cages at six sampling sites in Murchison bay for a period of six weeks, and sampling was done every 2 weeks for active biomonitoring and weekly for physico-chemical variables. The control (site 7) was at the Aquaculture Research and Development centre, Uganda. Fish tissue was dissected and gills, liver and muscle removed for heavy metal analysis. Water samples and fish tissue from each site were analysed using Atomic Absorption Spectrophotometer (AAS) to determine metal concentrations of zinc, copper, chromium and manganese. Site 4 had the highest average NH 4-N of 14.28 ± 12.73 mg/l which was above effluent standards for Uganda. From the findings, there were significantly higher concentrations of heavy metals in fish than in water ( p > 0.01). Fish kills were recorded highest for sites 4 (55%), 5 (77.5%) and 6 (60%) in less than six weeks indicating high levels of pollution. Gills showed the highest accumulation of copper after a period of six weeks as compared to other metals with a mean ± SE of 11.7 ?g/mg wet weight. In general, the order of accumulation of metals in tissue after six weeks was in order; copper > zinc > chromium > manganese and gills > liver > muscle. In conclusion, active biomonitoring was found to be a good tool for monitoring water quality as it integrates responses to combinations of all contaminants thereby indicating overall effects in a water body. To improve the study, there is need to incorporate post mortem studies and biomarker analysis since the later can give early warning of pollution before fish kills are observed.

Birungi, Z.; Masola, B.; Zaranyika, M. F.; Naigaga, I.; Marshall, B.

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Biosécurité et productivité du tilapia du Nil Oreochromis niloticus (Linnaeus, 1958 élevé en zone rurale ivoirienne  

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Full Text Available Biosecurity and Productivity of Nile Tilapia Oreochromis niloticus (Linnaeus, 1958 Bred in Ivoirian's Rural Zone. Fingerlings of tilapia Oreochromis niloticus were bred in three types of fish farming of rural zone in Ivory Coast to determine impacts of the compliance of biosecurity measures on zootechnical parameters of these bred fishes. Fish farming were shared out in three types of farming based on the value of biosecurity measures compliance, which were 5%, 55%, and 83%. No significant differences were observed between mean values of physic and chemical parameters of ponds water from three types of fish farming. Concerning mean values of zootechnical parameters, the fish breeding with 83% of rate compliance of biosecurity measures had registered better values of zoo technical performance with significant differences compared with others types of fish farming.

Kone, M.

2012-01-01

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Some biological and hematological responses of Oreochromis niloticus juveniles exposed to Atrazine herbicide  

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This research was aimed at finding the influence of Atrazine on a most widely farmed fish,Oreochromis niloticus (Linnaeus, 1758), in Nigeria. Specific areas of investigation were to find the LC50after 24, 48, 72 and 96 hours of the chemical administration to the fish. The effects of the chemical onthe behavioral and biological responses of O. niloticus were equally observed. The ten fish each werestocked in six different tanks containing 40 liters of water. These tanks contained...

2012-01-01

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Induction of testis-ova in nile tilapia (Oreochromis niloticus) exposed to 17?-estradiol  

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The efficacy of Endocrine Disrupting Compounds (EDCs), 17?-estradiol was tested on the fish Oreochromis niloticus in order to understand the intersex relationship of fish, in which sequential hermaphrodism can consist of a male changing into a female (protandry) or a female changing into a male (protogyny). The fish were equally divided into 3 groups. The first group was the control group; the second and third groups were treated with 10 and 100 mg L-1 of 17?-estradiol, respectively, for 30...

Piya Kosai; Wannee Jiraungkoorskul; Chaivira Sachamahithinant; Kanitta Jiraungkoorskul

2011-01-01

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Acute toxicity of Euphorbia kamerunica on Oreochromis niloticus.  

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A series of static short-term bioassays was conducted to assess the acute toxicity of the plant Euphorbia kamerunica on the fingerlings of Oreochromis niloticus. The 96-h LC(50) was computed using two methods: probit analysis and the arithmetic graphic method. The overall mean value of 0.023 +/- 0.002 g/L was obtained. Aquatic invertebrates are generally much more sensitive than fish species. Poisoning of streams with this plant to capture fish may therefore have ecological consequences, as nontarget aquatic animals may be killed in the process. Water quality standards for the protection of aquatic life are based on toxicity data for the most sensitive species found in the aquatic environment. We therefore suggest that E. kamerunica should not be used directly in freshwater bodies without detailed studies of its long-term effects on nontarget organisms as well its structure-activity relationship. PMID:15978298

Fai, P B A; Fagade, S O

2005-09-01

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Effect of Some Water Pollutants on the Biology of the Nile Bolti, Oreochromis niloticus  

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Samples of water and Oreochromis niloticus fish were collected from El-Mahmoudya channel near Alexandria for contaminants determination. The data show that El Mahmoudya channel water includes relatively high levels of Fe, Cu and chlordane and much higher levels of Zn and lindane. Most of the dissolved, metals and organic contaminants or their metabolites were monitored in the fish and then eggs. The above pollutants were found to affect spawning behaviour and duration. The avera...

2004-01-01

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Genotype by production environment interaction in the GIFT strain of Nile tilapia (Oreochromis niloticus)  

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Three discrete generations of GIFT fish (Nile tilapia strain, Oreochromis niloticus; a total of 10,065 fish with pedigree and phenotypic information) were tested in pond and cage culture environments to determine genotype by production environment interaction between both environments in Malaysia. Live weight (selected trait), standard length, body depth and width were recorded. A bivariate animal model was used to estimate variance and covariance components, whereby the homologous body trait...

Khaw, H. L.; Ponzonia, R. W.; Hamzah, A.; Abu-bakara, K. R.; Bijma, P.

2012-01-01

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Cadmium Accumulation in Gill, Liver, Kidney and Muscle Tissues of Common Carp, Cyprinus carpio, and Nile Tilapia, Oreochromis niloticus.  

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Accumulation of cadmium in gill, liver, muscle and kidney tissues of Cyprinus carpio and Oreochromis niloticus were investigated in fish exposed to 0.5 ppm cadmium over 1, 15 and 30 days under controlled laboratory conditions. Tissue accumulation of the metal was measured using Atomic Absorption Spectrophotometric techniques. Cadmium accumulation in gill, liver, kidney and muscle, tissues of C. carpio and O. niloticus exposed to metal for 1, 15 and 30 days increased significantly compared with the control group (p carpio than O. niloticus, whereas kidney accumulation of the metal was higher in O. niloticus than C. carpio. PMID:24526282

Ye?ilbudak, Burcu; Erdem, Cahit

2014-05-01

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Perfil proteico de tilápia nilótica chitralada (Oreochromis niloticus), submetida ao estresse crônico por hipóxia / Proteic electrophoretic profile of chitralada tilapia nilotic (Oreochromis niloticus), exposed to hypoxia chronic stress  

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Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Avaliou-se a variação da resposta secundária ao estresse causado por hipóxia durante 18 dias, em sistema de recirculação, em uma linhagem de tilápia nilótica (Oreochromis niloticus), chitralada, refletida no perfil proteico eletroforético do peixe e avaliou-se a diferença entre sexos para essa respo [...] sta. Foram utilizados 126 peixes, sendo 60 machos e 66 fêmeas, ambos com média de peso de 800g. O estresse crônico por hipóxia alterou (P Abstract in english This study evaluated the secundary response variation to hypoxia stress in a strain of chitralada nilotic tilapia (Oreochromis niloticus) during 18 days, in a recirculation system. The effects were measured by the proteic electrophoretic profile and the difference between the genders. One hundred tw [...] enty-six fish were used, 60 males and 66 females, both averaging 800g. The chronic hypoxia stress altered (P

Melo, D.C.; Oliveira, D.A.A.; Melo, M.M.; Júnior, D.V.; Teixeira, E.A.; Guimarães, S.R..

 
 
 
 
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Seasonal variability in cadmium, lead, copper, zinc and iron concentrations in the three major fish species, Oreochromis niloticus, Lates niloticus and Rastrineobola argentea in Winam Gulf, Lake Victoria: impact of wash-off into the lake.  

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Trace metals Cadmium (Cd), Lead (Pb), Copper (Cu), Zinc (Zn) and Iron (Fe) were analyzed in edible portions of three main finfish species namely Lates niloticus, Oreochromis niloticus and Rastrineobola argentea sampled from various beaches of Winam Gulf, Lake Victoria, Kenya, in order to determine any seasonal and site variations and the results showed significantly (p < 0.05) higher mean concentrations of Cd, Cu, Zn and Fe during the wet season compared to the dry season for all the three species indicating the impact of wash-off into the lake during the rainy periods. The overall mean concentrations of the heavy metals (in ?g/g dry weight) in all combined samples ranged from 0.17-0.40 (Cd), 0.47-2.53 (Pb), 2.13-8.74 (Cu), 28.9-409.3 (Zn) and 31.4-208.1 (Fe), respectively. It was found that consumption of Rastrineobola argentea can be a significant source of heavy metals especially Zn, to humans, compared with Lates niloticus and Oreochromis niloticus, if only the muscle parts of the latter two are consumed. PMID:22130608

Ongeri, David M K; Lalah, Joseph O; Wandiga, Shem O; Schramm, Karl-Werner; Michalke, Bernard

2012-02-01

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Karyotype Analysis of the Hybrid, Thai Red Tilapia (Oreochromis niloticus Linn. X Oreochromis mossambicus Linn.)  

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Thai Red Tilapia is the hybrid fish between Oreochromis niloticus Linn. and O. mossambicus Linn. The chromosomal constitution of this hybrid were investigated using high quality metaphase preparations obtained from their bone marrow. The diploid chromosome of Tilapias consisted of 22 chromosome pairs (2n = 44). However, the morphology of their chromosome types were different. The karyotype of O. niloticus consisted of 18 subtelocentric (st), 26 acrocentric (...

Jiradej Manosroi; Keravit Petchjul; Umnat Mevatee; Aranya Manosroi

2003-01-01

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Organochlorine Pesticides and Biomarker Responses in Two Fishes Oreochromis niloticus (Linnaeus, 1758) and Chrysichthys nigrodigitatus (Lacepède, 1803) and an Invertebrate, Macrobrachium vollenhovenii (Herklot, 1857), from the Lake Taabo (Côte d’Ivoire)  

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The concentrations of organochlorine pesticides (OCPs) were determined in muscle samples of two species of fish, tilapia (Oreochromis niloticus) and the catfish (Chrysichthys nigrodigitatus) and the prawn (Macrobrachium vollenhovenii) found in Lake Taabo (Côte d’Ivoire). Simultaneous measurements of enzymatic biomarkers were made to evaluate the ecotoxicological risk in this hydroelectric reservoir. Lindane and endosulfan were the dominant contaminants, suggestin...

Helene Roche; Abiba Tidou; Ana Persic

2007-01-01

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Visual communication stimulates reproduction in Nile tilapia, Oreochromis niloticus (L.)  

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Full Text Available SciELO Brazil | Language: English Abstract in english Reproductive fish behavior is affected by male-female interactions that stimulate physiological responses such as hormonal release and gonad development. During male-female interactions, visual and chemical communication can modulate fish reproduction. The aim of the present study was to test the ef [...] fect of visual and chemical male-female interaction on the gonad development and reproductive behavior of the cichlid fish Nile tilapia, Oreochromis niloticus (L.). Fifty-six pairs were studied after being maintained for 5 days under one of the four conditions (N = 14 for each condition): 1) visual contact (V); 2) chemical contact (Ch); 3) chemical and visual contact (Ch+V); 4) no sensory contact (Iso) - males and females isolated. We compared the reproductive behavior (nesting, courtship and spawning) and gonadosomatic index (GSI) of pairs of fish under all four conditions. Visual communication enhanced the frequency of courtship in males (mean ± SEM; V: 24.79 ± 3.30, Ch+V: 20.74 ± 3.09, Ch: 0.1 ± 0.07, Iso: 4.68 ± 1.26 events/30 min; P

Castro, A.L.S.; Gonçalves-de-Freitas, E.; Volpato, G.L.; Oliveira, C..

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Infestation of ectoparasites on Nile tilapia (Oreochromis niloticus) in aquaculture production in the Ashanti region, Ghana  

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A survey was carried out to investigate the prevalence and mean intensities of ectoparasites infestation on the gills and skin mucus of Nile tilapia (Oreochromis niloticus) in some selected fish farms in the Ashanti region of Ghana. Pond water quality was also determined. Oral on-farm interviews on pond management practices were carried out on the farms. The results obtained revealed three types of ectoparasites namely; Trichodina sp., monogeneans and Tetrahymena sp. of which the first two we...

Amoako, Mary

2006-01-01

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Lake Victoria wetlands and the ecology of the Nile tilapia, oreochromis niloticus linn,.  

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An ecological study of wetlands was undertaken in northern Lake Victoria (East Africa) between 1993 and 1996 with a major aim of characterising shallow vegetation-dominated interface habitats, and evaluating their importance for fish, in particular, for the stocked and socio-economically important Oreochromis niloticus LINNÉ (the Nile tilapia). From field and laboratory experiments, five major habitat types could be defined by the type of the dominant emergent macrophyte at the shore from th...

Balirwa, J. S.

1998-01-01

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Five Different Piscidins from Nile Tilapia, Oreochromis niloticus: Analysis of Their Expressions and Biological Functions  

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Piscidins are antimicrobial peptides (AMPs) that play important roles in helping fish resist pathogenic infections. Through comparisons of tilapia EST clones, the coding sequences of five piscidin-like AMPs (named TP1?5) of Nile tilapia, Oreochromis niloticus, were determined. The complete piscidin coding sequences of TP1, -2, -3, -4, and -5 were respectively composed of 207, 234, 231, 270, and 195 bases, and each contained a translated region of 68, 77, 76, 89, and 64 amino acids. The tiss...

2012-01-01

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Apparent digestibility coefficient of duckweed (Lemna minor), fresh and dry for Nile tilapia (Oreochromis niloticus L.)  

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Dry matter (DMD), protein (PD), ash (AD), fat (FD), gross energy (ED) and phosphorus (PhD) digestibility coefficients were determined for five different iso-N fish diets fed to Nile tilapia (Oreochromis niloticus). The control diet contained fishmeal (35Œ corn (29Œ wheat (20Œ wheat bran (10Œ fish oil (3Œ diamol (2€and premix (1Ž Partial replacement of dry matter of fishmeal, corn grain, wheat grain, wheat bran and fish oil by 20nd 40?f dry matter of duckweed, in a dry and fresh form...

El-shafai, S. A. A. M.; El-gohary, F.; Verreth, J. A. J.; Schrama, J. W.; Gijzen, H. J.

2004-01-01

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Effect of Some Water Pollutants on the Biology of the Nile Bolti, Oreochromis niloticus  

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Full Text Available Samples of water and Oreochromis niloticus fish were collected from El-Mahmoudya channel near Alexandria for contaminants determination. The data show that El Mahmoudya channel water includes relatively high levels of Fe, Cu and chlordane and much higher levels of Zn and lindane. Most of the dissolved, metals and organic contaminants or their metabolites were monitored in the fish and then eggs. The above pollutants were found to affect spawning behaviour and duration. The average number of eggs per spawn were higher in the control groups than the contaminated ones. The residue levels monitored in the eggs affected the fry survival of the Nile fish.

K.K. Barakat

2004-01-01

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Eutrophization process in a system used for rearing the nile tilapia (Oreochromis niloticus), São Paulo State, Brazil Processo de eutrofização em um sistema utilizado para a criação da tilápia do Nilo (Oreochromis niloticus), São Paulo, Brasil  

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Aquaculture is composed of various themes of interest, particularly does eutrophization due to feeding have direct effects on fish ponds and the whole aquatic system. This study focused on the study of the water quality of an aquatic system related to Nile tilapia (Oreochromis niloticus) rearing. Sampling was done at six sites during one rearing cycle (six months), taking water from the source of water supply, the fish pond itself, the effluent of the fish pond and the mixed waters. A princip...

Jeniffer Sati Pereira; Cacilda Thais Janson Mercante; Julio Vicente Lombardi; André Martins Vaz-dos-Santos; Clóvis Ferreira do Carmo; João Alexandre Saviolo Osti

2012-01-01

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Salinity Tolerance and Preference of Hatchery Reared Nile Tilapia, Oreochromis niloticus (Linneaus 1758  

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Full Text Available A study was conducted in fisheries laboratory of Department of Fisheries, Lagos State University, Nigeria on salinity tolerance and preference of hatchery reared Nile tilapia, Oreochromis niloticus, (Linneaus, 1758. Tilapias are important candidate species for aquaculture and are increasingly cultured in polyculture system with shrimp. Thus creating a demand for Tilapia genotypes well suited to elevated salinities. O. niloticus is a member of the Family Cichlidae and one of most cultured fish species in Nigeria. It is known for its high prolific rate of breeding and multiplication. Six hundred and sixty (660 fingerlings of the fish measuring between 53-140 mm TL and weighing 8.96 to 21.56 g BW were subjected to salinity regimes of 0-10‰ for 28 days. All the fish survived in 0-7‰, and 100% death was recorded in 9 and 10‰. Different levels of behavioural responses to threat and feeding were observed among the fish. Salinities 0-7‰ were tolerated by the fish, however the most preferred salinity was 1‰. The present study as demonstrated in the laboratory therefore, suggests the possibility of culturing Nile tilapia, O. niloticus in both fresh and low brackish water environments and as added data to the existed reviews on this economically valued fish species. The salinity regimes well that were tolerated and preferred for optimal survival, growth and behavioural performances of O. niloticus are therefore investigated.

E.O. Lawson

2011-03-01

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Shrimp meal in diets for Nile tilapia ("Oreochromis niloticus" Farinha de camarão em dietas para tilápia do Nilo ("Oreochromis niloticus"  

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Full Text Available Replacement of conventional ingredients used in fish diets by non-conventional products has been an economic alternative to reduce the cost of feeding. Therefore, 90-day trial was performed to study the effect of shrimp meal (SM inclusion on diets of Nile tilapia fries. Weight gain (WG, feed conversion (FC, apparent feed intake (AFI, fillet yield (FY, fillet income (FI values and protein effiency ratio (PER were evaluated. Each experimental unit was an aquaria with five tilapias (Oreochromis niloticus, mean body weight of 7,9g, total of 120 animals. Treatments were four diets with 0, 25, 50 and 100% of SM replacing the soybean meal, which protein (28.0% and energy (3100 kcal/DE/kg content in diet were similar. Animals were fed three times daily. The offered food was adjusted according to fish live weight. The substitution of soybean by SM reduced WG, FC, AFI, FY and PER. SM inclusion did not affect the FI. Shrimp meal inclusion in diets for Nile tilapia affects negatively the growth performance.O objetivo deste estudo foi testar a inclusão da farinha de camarão (FC em dietas para a tilápia do Nilo. O desempenho dos animais foi avaliado através do ganho de peso (GP, conversão alimentar aparente (CAA, consumo de ração aparente (CRA, peso de filé (PF, rendimento de filé (RF e taxa de eficiência protéica (TEP. O delineamento utilizado no experimento foi em blocos casulaizados distribuídos em 24 caixas de polietileno com capacidade de 150 L supridas por sistema de recirculação fechada de água (0,2L/min. durante 90 dias. Cada unidade experimental era composta por um aquário com cinco tilápias (Oreochromis niloticus com peso médio inicial de aproximadamente 7,9g perfazendo um total de 120 animais. Os tratamentos constituíram-se de quatro rações contendo 0, 25, 50 e 100% de FC em substituição ao farelo de soja, sendo estas isoprotéicas (28,0%PB e isoenergéticas (3100 kcal de EB/kg. Os animais foram alimentados três vezes ao dia com a quantidade de ração fornecida ad libitum. A farinha de camarão pode substituir a proteína do farelo de soja até 50% de inclusão sem comprometer o ganho de peso, conversão alimentar e peso do filé.

Graciela Pessoa Martins

2008-04-01

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Effect of an Insecticide Abamectin on Some Biochemical Characteristics of Tilapia Fish (Oreochromis Niloticus)  

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Problem statement: Presence of pesticide in streams and lakes is largely due to the runoff from agricultural fields. Pesticides are not highly selective but are generally toxic to many macrophytes, non-target organisms such as fish. Fish, generally accumulate contaminants from aquatic environments and have been largely used in food safety studies. Approach: The toxic effect of the insecticide abamectin on oxygen consumption and some biochemical characteristic...

Al-kahtani, Mohammed A.

2011-01-01

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Effect of an Insecticide Abamectin on Some Biochemical Characteristics of Tilapia Fish (Oreochromis Niloticus)  

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Problem statement: Presence of pesticide in streams and lakes is largely due to the runoff from agricultural fields. Pesticides are not highly selective but are generally toxic to many macrophytes, non-target organisms such as fish. Fish, generally accumulate contaminants from aquatic environments and have been largely used in food safety studies. Approach: The toxic effect of the insecticide abamectin on oxygen consumption and some biochemical characteristics (total protein, ca...

Al-kahtani, Mohammed A.

2011-01-01

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Accumulation of Heavy Metals in Tilapia Fish (Oreochromis niloticus from Al-Khadoud Spring, Al-Hassa, Saudi Arabia  

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Full Text Available Problem statement: Al-Khadoud Spring is one of the largest spring in Al-Hassa governorate (Saudi Arabia. Due to the extended domestic activities and urbanization as well as the continuous industrial and agricultural growth of the region, spring water quality is potentially changing. Approach: This study was conducted to measure toxic heavy metal concentrations in water and fish samples along the spring channel. Filtered spring water and tissues (liver and muscle of captured fish were analyzed for heavy metals in an Atomic Absorption Spectrophotometer equipped with a Varian Model. Results: The concentrations of metals in water were found in the following order: Fe2+>Zn2+>Cu2+ >Pb2+>Mn2+>Cd2+. The levels of heavy metals recorded in water in this study were generally low, when compared to WHO and USEPA recommended levels in water, except iron which was found to be higher than the recommended levels. In fish samples collected from the polluted spring, metal levels were significantly higher than the levels in water, indicating bioaccumulation. The highest levels of metals were generally reported in fish liver than muscle. Hepatic metal levels were ranked as follow: Zn2+>Cu2+>Pb2+>Cd2+. Conclusion: The present results showed that, the fishes, based on the higher levels of metal bioaccumulation, could be unsafe for human consumption. Consequently, very close monitoring of heavy metal loads in Al-Khadoud spring is recommended in view of the possible risks to health of consumers.

Mohammed A. Al-Kahtani

2009-01-01

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Visual communication stimulates reproduction in Nile tilapia, Oreochromis niloticus (L.  

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Full Text Available Reproductive fish behavior is affected by male-female interactions that stimulate physiological responses such as hormonal release and gonad development. During male-female interactions, visual and chemical communication can modulate fish reproduction. The aim of the present study was to test the effect of visual and chemical male-female interaction on the gonad development and reproductive behavior of the cichlid fish Nile tilapia, Oreochromis niloticus (L.. Fifty-six pairs were studied after being maintained for 5 days under one of the four conditions (N = 14 for each condition: 1 visual contact (V; 2 chemical contact (Ch; 3 chemical and visual contact (Ch+V; 4 no sensory contact (Iso - males and females isolated. We compared the reproductive behavior (nesting, courtship and spawning and gonadosomatic index (GSI of pairs of fish under all four conditions. Visual communication enhanced the frequency of courtship in males (mean ± SEM; V: 24.79 ± 3.30, Ch+V: 20.74 ± 3.09, Ch: 0.1 ± 0.07, Iso: 4.68 ± 1.26 events/30 min; P < 0.05, two-way ANOVA with LSD post hoc test, induced spawning in females (3 spawning in V and also 3 in Ch+V condition, and increased GSI in males (mean ± SEM; V: 1.39 ± 0.08, Ch+V: 1.21 ± 0.08, Ch: 1.04 ± 0.07, Iso: 0.82 ± 0.07%; P < 0.05, two-way ANOVA with LSD post hoc test. Chemical communication did not affect the reproductive behavior of pairs nor did it enhance the effects of visual contact. Therefore, male-female visual communication is an effective cue, which stimulates reproduction among pairs of Nile tilapia.

A.L.S. Castro

2009-04-01

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Alterações histológicas em brânquias de tilápia nilotica Oreochromis niloticus causadas pelo cádmio Histological alterations in gills of Nile tilapia Oreochromis niloticus caused by cadmium  

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Full Text Available Os efeitos histopatológicos do cádmio nas brânquias de tilápia Oreochromis niloticus foram estudados por microscopia óptica, usando 25mgl-1 de CdCl2 durante quatro dias, com o objetivo de identificar seus efeitos agudos na estrutura das brânquias. A morfologia geral das brânquias de O. niloticus é idêntica à de outros teleósteos, apresentando quatro pares de arcos branquiais com filamentos bem desenvolvidos. Situadas lateralmente, encontram-se as lamelas provenientes do eixo central dos filamentos. No epitélio filamentar foi possível identificar células de cloro, pavimentosas e mucosas. Os peixes expostos ao cádmio mostraram sinais de lesões epiteliais; edema intersticial, vasodilatação das lamelas, destacamento do epitélio lamelar e proliferação do epitélio filamentar. As alterações observadas também incluíram fusão nas lamelas como resultado de hiperplasia e hipertrofia epitelial, ruptura do sistema de células pilar, aneurismas e necroses.The histopathogical effects of cadmium on the gills of tilapia Oreochromis niloticus were studied by light microscopy, using 25mgl-1 of CdCl2 during four days to identified the effects of short-term exposure on gills structure. The general morphology of O. niloticus gills is similar to the other teleostean fishes, showing four pairs of gills arches with well developed filaments. Bilaterally situated, secondary lamellae branches are found from the central axis of the filaments. The filamentar epithelium showed the chloride cells, the pavement cells and mucous cells. Fish exposed to cadmium showed signs of epithelial lesion, namely the interstitial edema, swollen of the lamellae, lifting and cellular proliferation of the filamentar epithelium. The changes of the gills also included lamellar fusion as a result of epithelial hyperplasia and hypertrophy, the breakdown of pillar cell system, and aneurisms with some ruptures and necrosis, especially in the filamentar epithelium.

S. Garcia-Santos

2007-04-01

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Alterações histológicas em brânquias de tilápia nilotica Oreochromis niloticus causadas pelo cádmio / Histological alterations in gills of Nile tilapia Oreochromis niloticus caused by cadmium  

Scientific Electronic Library Online (English)

Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Os efeitos histopatológicos do cádmio nas brânquias de tilápia Oreochromis niloticus foram estudados por microscopia óptica, usando 25mgl-1 de CdCl2 durante quatro dias, com o objetivo de identificar seus efeitos agudos na estrutura das brânquias. A morfologia geral das brânquias de O. niloticus é i [...] dêntica à de outros teleósteos, apresentando quatro pares de arcos branquiais com filamentos bem desenvolvidos. Situadas lateralmente, encontram-se as lamelas provenientes do eixo central dos filamentos. No epitélio filamentar foi possível identificar células de cloro, pavimentosas e mucosas. Os peixes expostos ao cádmio mostraram sinais de lesões epiteliais; edema intersticial, vasodilatação das lamelas, destacamento do epitélio lamelar e proliferação do epitélio filamentar. As alterações observadas também incluíram fusão nas lamelas como resultado de hiperplasia e hipertrofia epitelial, ruptura do sistema de células pilar, aneurismas e necroses. Abstract in english The histopathogical effects of cadmium on the gills of tilapia Oreochromis niloticus were studied by light microscopy, using 25mgl-1 of CdCl2 during four days to identified the effects of short-term exposure on gills structure. The general morphology of O. niloticus gills is similar to the other tel [...] eostean fishes, showing four pairs of gills arches with well developed filaments. Bilaterally situated, secondary lamellae branches are found from the central axis of the filaments. The filamentar epithelium showed the chloride cells, the pavement cells and mucous cells. Fish exposed to cadmium showed signs of epithelial lesion, namely the interstitial edema, swollen of the lamellae, lifting and cellular proliferation of the filamentar epithelium. The changes of the gills also included lamellar fusion as a result of epithelial hyperplasia and hypertrophy, the breakdown of pillar cell system, and aneurisms with some ruptures and necrosis, especially in the filamentar epithelium.

Garcia-Santos, S.; Monteiro, S.M.; Carrola, J.; Fontainhas-Fernandes, A..

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Mercury exposure in the freshwater tilapia Oreochromis niloticus  

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Mercury (Hg) can be strongly accumulated and biomagnified along aquatic food chain, but the exposure pathway remains little studied. In this study, we quantified the uptake and elimination of both inorganic mercury [as Hg(II)] and methylmercury (as MeHg) in an important farmed freshwater fish, the tilapia Oreochromis niloticus, using 203Hg radiotracer technique. The dissolved uptake rates of both mercury species increased linearly with Hg concentration (tested at ng/L levels), and the uptake rate constant of MeHg was 4 times higher than that of Hg(II). Dissolved uptake of mercury was highly dependent on the water pH and dissolved organic carbon concentration. The dietborne assimilation efficiency of MeHg was 3.7-7.2 times higher than that of Hg(II), while the efflux rate constant of MeHg was 7.1 times lower. The biokinetic modeling results showed that MeHg was the greater contributor to the overall mercury bioaccumulation and dietary exposure was the predominant pathway. - Trophic transfer was the predominant pathway for mercury accumulation in tilapia, and methylmercury was more important in contributing to Hg accumulation than Hg(II).

2010-08-01

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Mercury exposure in the freshwater tilapia Oreochromis niloticus  

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Mercury (Hg) can be strongly accumulated and biomagnified along aquatic food chain, but the exposure pathway remains little studied. In this study, we quantified the uptake and elimination of both inorganic mercury [as Hg(II)] and methylmercury (as MeHg) in an important farmed freshwater fish, the tilapia Oreochromis niloticus, using {sup 203}Hg radiotracer technique. The dissolved uptake rates of both mercury species increased linearly with Hg concentration (tested at ng/L levels), and the uptake rate constant of MeHg was 4 times higher than that of Hg(II). Dissolved uptake of mercury was highly dependent on the water pH and dissolved organic carbon concentration. The dietborne assimilation efficiency of MeHg was 3.7-7.2 times higher than that of Hg(II), while the efflux rate constant of MeHg was 7.1 times lower. The biokinetic modeling results showed that MeHg was the greater contributor to the overall mercury bioaccumulation and dietary exposure was the predominant pathway. - Trophic transfer was the predominant pathway for mercury accumulation in tilapia, and methylmercury was more important in contributing to Hg accumulation than Hg(II).

Wang Rui [Department of Biology, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon (Hong Kong); Wong Minghung [Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University (Hong Kong); Wang Wenxiong, E-mail: wwang@ust.h [Department of Biology, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon (Hong Kong)

2010-08-15

 
 
 
 
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Physiological Studies on Tilapia Fish (Oreochromis niloticus) as Influenced by the Cyanobacterial Toxins Microcystin  

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The effects of microcystin produced by the toxic cyanobacterial strain Microcystis aeruginosa on bioaccumulation and antioxidant enzymes (superoxide dismutase and catalase) of tilapia fish (collected from Al-Khadoud spring, Al-Hasa, Saudi Arabia) were investigated. The results showed that microcystin contained in cyanobacterial blooms induce CAT and SOD activity in a time-dependent manner. The data also shows that microcystin concentration in muscle was much lower than in liver, as the...

Al-kahtani, M. A.; Fathi, A. A.

2008-01-01

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Valores bioquímicos séricos de tilapia del nilo (oreochromis niloticus) en cultivo intensivo / Serum biochemical values for nile tilapia (oreochromis niloticus) cultured under an intensive system  

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Full Text Available SciELO Peru | Language: Spanish Abstract in portuguese Objetivou-se a avaliação dos parâmetros bioquímicos séricos de tilápias do Nilo (Oreochromis niloticus), linhagem tailandesa Chitralada, produzidas em sistema de piscicultura intensiva e capturadas por tarrafeamento. Amostras sanguíneas de 40 exemplares, pesando em média 453 ± 52 g, foram obtidas po [...] r venopunção caudal e posteriormente analisadas quanto às concentrações séricas de proteína total, albumina, globulinas, ácido úrico, creatinina, ureia, cálcio, fósforo inorgânico, relação Ca/P, magnésio e fosfatase alcalina. Em um contexto geral, os resultados evidenciaram parâmetros semelhantes aos estabelecidos para peixes de escama, com exceção do ácido úrico. Abstract in spanish El objetivo del estudio fue evaluar los parámetros bioquímicos séricos de tilapias del Nilo (Oreochromis niloticus), linaje tailandés chitralada, producidas en un sistema de piscicultura intensiva y capturadas con atarraya. Se tomaron muestras de sangre a 40 ejemplares por punción de la vena caudal. [...] Los peces tenían un peso de 453 ± 52 g. Se determinó proteína total, albúmina, globulinas, ácido úrico, creatinina, urea, calcio, fósforo inorgánico, relación Ca/P, magnesio y fosfatasa alcalina. En un contexto general, los resultados mostraron parámetros semejantes a los establecidos para peces de escama, con excepción del ácido úrico. Abstract in english The aim of the study was to evaluate the serum biochemical parameters of the Nile tilapia (Oreochromis niloticus), Thai Chitralada lineage, raised under an intensive pisciculture system and captured by the cast net technique. Blood samples from 40 individuals were obtained by caudal venopuncture. Me [...] an body weight was 453 ± 52 g. The serum biochemical parameters evaluated were total protein, albumin, globulins, acid uric, creatinine, urea, calcium, inorganic phosphorus, Ca/P ratio, alkaline phosphatase, and magnesium. In general, the data showed similar parameters in comparison to those established for scale fish, exception of the acid uric.

Leandro, Z. Crivelenti; Sofia, Borín; José Javier, M. Socha; Antonio V, Mundim.

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Assessment of polycyclic aromatic hydrocarbons in Lates niloticus, Oreochromis niloticus and Rastrineobola argentea as sources of human exposure in Kisumu Bay, Winam Gulf of Lake Victoria.  

Science.gov (United States)

The concentrations of polycyclic aromatic hydrocarbons (PAHs) in Lates niloticus, Oreochromis niloticus and Rastrineobola argentea from three beaches were assessed to establish whether they are sources of human exposure in Kisumu Bay, Winam Gulf, Lake Victoria, Kenya. O. niloticus had 12 PAHs detected (TPAH 3.93 ?g/kg); L. niloticus had 11 (TPAH 3.17 ?g/kg). In both cases, the highest and lowest concentrations were Pyrene and Indeno(1,2,3-cd)pyrene, respectively, and the TPAHs were greater than the 2 ?g/kg limit allowed by the European Commission although individually they were lower. R. argentea had 2 PAHs (TPAH 0.035 ?g/kg). PAH pollution in the Winam Gulf, a potential source of exposure to human through contaminated fish, should be mitigated and safe management practices that reduce PAH levels should be adopted. PMID:22349308

Onyango, Alice A; Lalah, Joseph O; Wandiga, Shem O; Gichuki, John

2012-05-01

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Health Condition of a Farmed Tilapia (Oreochromis niloticus) in Earthen Ponds, Northern Bangladesh  

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Investigation on health conditions of a farmed tilapia (Oreochromis niloticus) in two upazilas of Mymensingh District were carried out through clinical and histopathological observation during September, 2010 to March, 2011. Fish sample and water quality parameters (temperature, dissolved oxygen, pH, alkalinity, nitrite and ammonia) were monitored on a monthly basis. Clinical observations of the fish were also done for any kind of abnormalities at monthly intervals. Samples of skin, mu...

Ahmed, G. U.; Khatun, T.; Belal Hossain, M.; Shamsuddin, M.

2012-01-01

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Bioactivity of crude ethanol extract and fractions of Eugenia uniflora (Myrtaceae) in the hepatopancreas of Oreochromis niloticus L  

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This study evaluates the bioactivity of the crude ethanol extract and ethyl acetate, hexane and chloroform fractions obtained from Eugenia uniflora leaves using the hepatopancreas of Oreochromis niloticus L. as an experimental model. The ethanol extract and fractions were administered to the fish orally with their feed. Twenty-four hours later, the fish were sacrificed and their livers dissected, fixed in neutral formalin, embedded in paraffin and sectioned. Histological analyses were perform...

Fiuza, Tatiana S.; Silva, Paulo C.; Paula, Jose? R.; Tresvenzol, Leonice M. F.; Sabo?ia-morais, Simone M. T.

2009-01-01

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Nutritional aspects of nile tilapia (Oreochromis niloticus silage Aspectos nutricionais da silagem de tilápia-do-nilo (Oreochromis niloticus  

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Full Text Available One third of the world's fishing produce is not directly used for human consumption. Instead, it is used for making animal food or is wasted as residue. It would be ideal to use the raw material thoroughly and to recover by-products, preventing the generation of residues. With the objectives of increasing the income and the production of the industry, as well as minimizing environmental and health problems from fish residue, chemical silage from Tilapia (Oreochromis niloticus processing residues was developed after homogenization and acidification of the biomass with 3% formic acid: propionic, 1:1, addition of antioxidant BHT and maintenance of pH at approximately 4.0. Analyses to determine the moisture, protein, lipids and ash were carried out. The amino acids were examined in an auto analyzer after acid hydrolysis, except for the tryptophan which was determined through colorimetry. The tilapia silage presented contents that were similar to or higher than the FAO standards for all essential amino acids, except for the tryptophan. The highest values found were for glutamic acid, lysine and leucine. The results indicate a potential use of the silage prepared from the Nile tilapia processing residue as a protein source in the manufacturing of fish food.Um terço da captura mundial de pescado não é empregada para o consumo direto na alimentação humana, segue para elaboração de rações ou é desperdiçada como resíduo. O ideal seria utilizar a matéria-prima em toda a sua extensão e recuperar os subprodutos, evitando a própria formação do resíduo. Com os objetivos de aumentar a receita e a eficiência de produção da indústria e, conseqüentemente, minimizar os problemas ambientais e de sanidade, provenientes do resíduo de pescado, procedeu-se à elaboração da silagem química do resíduo de beneficiamento de Tilápia-do-Nilo (Oreocrhromis niloticus após homogeneização e acidificação da biomassa com 3% de ácido fórmico: propiônico, 1:1, adição de antioxidante BHT e manutenção do pH ao redor de 4,0. Foram realizadas análises para determinação da umidade, proteína, lipídios e cinza. Os aminoácidos foram examinados em auto-analisador após hidrólise ácida, à exceção do triptofano determinado por colorimetria. A silagem de tilápia apresentou valores semelhantes ou superiores ao padrão da FAO para todos os aminoácidos essenciais, exceto para o triptofano. Os valores mais elevados encontrados foram para o ácido glutâmico, leucina e lisina. Os resultados indicam a utilização potencial da silagem, preparada a partir do resíduo de processamento da Tilápia-do-Nilo, como fonte protéica na formulação de ração para peixes, uma vez que esta apresentou teores maiores para todos os aminoácidos contidos na farinha de peixe, com exceção do triptofano.

Lia Ferraz de Arruda

2006-12-01

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Pesticide residues in Nile tilapia (Oreochromis niloticus) and Nile perch (Lates niloticus) from Southern Lake Victoria, Tanzania  

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Nile tilapia (Oreochromis niloticus) and Nile perch (Lates niloticus) samples were collected from fish landing stations in nine riparian districts on the Tanzanian side of Lake Victoria and screened for residues of 64 organochlorine, organophosphorus, carbamate, and pyrethroid pesticides. The residue levels in the fish fillet were up to 0.003, 0.03 and 0.2 mg/kg fresh weight (0.7, 3.8 and 42 mg/kg lipid weight) of fenitrothion, DDT and endosulfan, respectively. Mean levels within sites were up to 0.002, 0.02 and 0.1 mg/kg fresh weight (0.5, 0.5 and 16 mg/kg lipid weight), respectively. The detection of higher levels of p,p'-DDT than the degradation products (p,p'-DDD and p,p'-DDE), and higher levels of endosulfan isomers (? and ?) than the sulphate, in fish samples, implied recent exposure of fish to DDT and endosulfan, respectively. Generally, most of the fish samples had residue levels above the average method detection limits (MDLs), but were within the calculated ADI. - Fish from Lake Victoria had relatively low pesticide levels

2006-03-01

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Pesticide residues in Nile tilapia (Oreochromis niloticus) and Nile perch (Lates niloticus) from Southern Lake Victoria, Tanzania  

Energy Technology Data Exchange (ETDEWEB)

Nile tilapia (Oreochromis niloticus) and Nile perch (Lates niloticus) samples were collected from fish landing stations in nine riparian districts on the Tanzanian side of Lake Victoria and screened for residues of 64 organochlorine, organophosphorus, carbamate, and pyrethroid pesticides. The residue levels in the fish fillet were up to 0.003, 0.03 and 0.2 mg/kg fresh weight (0.7, 3.8 and 42 mg/kg lipid weight) of fenitrothion, DDT and endosulfan, respectively. Mean levels within sites were up to 0.002, 0.02 and 0.1 mg/kg fresh weight (0.5, 0.5 and 16 mg/kg lipid weight), respectively. The detection of higher levels of p,p'-DDT than the degradation products (p,p'-DDD and p,p'-DDE), and higher levels of endosulfan isomers ({alpha} and {beta}) than the sulphate, in fish samples, implied recent exposure of fish to DDT and endosulfan, respectively. Generally, most of the fish samples had residue levels above the average method detection limits (MDLs), but were within the calculated ADI. - Fish from Lake Victoria had relatively low pesticide levels.

Henry, L. [Chemistry Department, University of Dar es Salaam. PO Box 35061, Dar es Salaam (Tanzania); Kishimba, M.A. [Chemistry Department, University of Dar es Salaam. PO Box 35061, Dar es Salaam (Tanzania)]. E-mail: kishimba@chem.udsm.ac.tz

2006-03-15

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Regulação da ingestão protéica na tilápia do Nilo, Oreochromis niloticus Hability of protein intake regulation in Nile Tilapia, Oreochromis niloticus  

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Full Text Available Estudou-se a habilidade de juvenis de tilápia do Nilo, Oreochromis niloticus, em regular a ingestão protéica. Mil exemplares com peso e comprimento de 13,93g ± 0,87g e 8,8cm ± 0,47cm, respectivamente, revertidos sexualmente, foram distríbuídos em oito grupos de 125 peixes, em aquários de 1.000 L com renovação contínua de água e dotados de dois alimentadores de demanda. Duas rações isoenergéticas (2.800 kcal/kg contendo, respectivamente, 40% e 15% PB foram oferecidas diariamente, ad libitum, em combinações que caracterizaram quatro tratamentos: A: ração de 15% PB de um lado e de 40% PB do outro do aquário; B: idêntico ao tratamento A com inversão dos lados; C: ração de 15% PB fornecida em dois alimentadores; e D: ração de 40% PB fornecida em dois alimentadores. O delineamento em quadrado latino permitiu que os peixes fossem submetidos a cada tratamento durante quatro fases de 15 dias (I, II, III e IV. Entre as fases, houve intervalo de uma semana, quando os peixes receberam dieta contendo 30% PB nos dois alimentadores. O consumo alimentar dos peixes, registrado diariamente, não diferiu significativamente entre os tratamentos A e B. Porém, quando foram apresentadas simultaneamente as dietas contendo mesmo teor de PB (Tratamentos C e D, observou-se consumo significativamente maior da ração contendo 15% de PB (Tratamento C. O ajuste em porcentagem da proteína ingerida pelos peixes revelou média de 24% de PB. Os resultados confirmaram a hipótese de que a tilápia do Nilo apresenta habilidade em regular a ingestão dietética protéica por meio de livre escolha.The free-choice feed and regulation of protein intake were investigated in juveniles reverted males of tilápia do Nilo, Oreochromis niloticus. During the experiment 1000 fish (reverted males with similar weigth and length were maintained in eight aquariuns supplied with recirculated water (groups of 125 fish each aquarium. Fish were fed by demand-feeders, containing the two experimental diets, formulated to contain 15% and 40% protein each and distributed in four treatments (A: 15% protein diet on one hand and 40% protein diet on the other hand, B: alike in A, therefore with an inversion on both hands, C: the two feeders supplied with 15% protein diet, D the two feeders supplied with 40% protein diet The Latin Square was the estatistical method used for the experiment, and the treatments were distributed into four stages (I, II, III and IV. A one week stop after each stage was stipulated and the fish received a 30% protein diet. The results showed that no differences about the intake was detected between fish fed by diets containing 15% and 40% protein in the same aquarium. However, with same diets in the tanks ( Treatment C and D, the animals that were fed with the 15% protein diet showed better feed intake. The percentage of regulated protein during the experiment was about 24% protein. The results confirm the hipoteses of free-choice ability by tilápia-do-Nilo to detect the level of protein in the diet.

Elyara Maria Pereira-da-Silva

2004-12-01

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Metallic Micropollutants in the Harvest of Oreochromis niloticus (Linnaeus, 1757from Polluted Waters: Wildlife and Human Concerns  

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Full Text Available Nile tilapia (Oreochromis niloticus were sampled at four locations along Lake Mary?t for eleven metal residues. Data were compared to certified levels for possible metal contamination. Generally, cadmium, lead, mercury, manganese and copper were above standard levels for unpolluted waters. The kidneys in O. niloticus were the principal store organs for most of the metals tested. In an outstanding result, the muscular edible tissue in O. niloticus was the principal destination for mercury. The majority of metals investigated as cadmium, copper, lead, mercury, zinc, chromium, cobalt, manganese and nickel exceeded most known accepted levels in fish tissue. Water lead seemed to correlate better with lead in composites of whole fish than in solitary organs. Mercury in water and fish tissue (particularly, the edible portion exceeded all credited levels for human consumption and the protection of fish and predator, thus posing an inevitable hazard to the whole ecosystem of the lake, probably for 100 years to come.

K.G. Adham

2001-01-01

71

Multiplex PCR for simultaneous detection of Streptococcus agalactiae, Streptococcus iniae and Lactococcus garvieae: a case of S. agalactiae infection in cultured Nile tilapia (Oreochromis niloticus and red tilapia (Oreochromis niloticus x Oreochromis mossambicus  

Directory of Open Access Journals (Sweden)

Full Text Available A multiplex PCR (m-PCR technique was developed for simultaneous detection of the causative agents responsible forstreptococcosis of cultured fish in Thailand i.e., Streptococcus agalactiae, Streptococcus iniae, and Lactococcus garvieae.The study on the sensitivity of the technique indicated that the minimum detected DNA concentration was 9.76, 39.06, and19.53 pg for S. agalactiae, S. iniae and L. garvieae, respectively. Detection of streptococcosis in healthy and diseased Niletilapia (Oreochromis niloticus and red tilapia (Oreochromis niloticus x Oreochromis mossambicus cultured in Paphayomand Bangkaew District, Phatthalung Province and Sichon and Hua Sai District, Nakhon Si Thammarat Province, Thailand, bym-PCR technique showed positive results for S. agalactiae from tilapia cultured in Bangkaew and Hua Sai and negativeresults for samples from Paphayom and Sichon. The m-PCR results were in accordance with microbiological culture techniques,which detected S. agalactiae from tilapia cultured in Bangkaew and Hua Sai indicating that our m-PCR assay is a sensitiveand specific diagnostic tool for simultaneous detection of streptococcosis caused by S. agalactiae, S. iniae and L. garvieaein cultured fish in Thailand.

Chutima Tantikitti

2012-11-01

72

Age and growth of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes: Cichlidae) in Mexico</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Age and growth of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> from Lagoon of Coatetelco, Morelos State, Mexico were studied from January through December, 1993. Scales of 318 specimens were collected. Modal length at capture was 10.5-11.5 cm standard length. Scales rings were formed during December. Back-calculated lengths-at-age showed no significant differences by sex. Four check marks were recorded. According to the growth curve parameters for population, the <span class="hlt">fish</span> grow at a low rate (k=0.07) until they achieve ...</p> <div class="credits"> <p class="dwt_author">José Luis Gómez-Márquez</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">73</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24096828"> <span id="translatedtitle">Intraperitoneal germ cell transplantation in the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Germ cell transplantation offers promising applications in finfish aquaculture and the preservation of endangered species. Here, we describe an intraperitoneal spermatogonia transplantation procedure in the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Through histological analysis of early gonad development, we first determined the best suitable stage at which exogenous germ cells should be transplanted into the recipients. For the transplantation procedure, donor testes from a transgenic Nile tilapia strain carrying the medaka ?-actin/enhanced green fluorescent protein (EGFP) gene were subjected to enzymatic dissociation. These testicular cells were then stained with PKH26 and microinjected into the peritoneal cavity of the recipient <span class="hlt">fish</span>. To confirm colonization of the donor-derived germ cells, the recipient gonads were examined by fluorescent and confocal microscopy. PKH26-labeled cells exhibiting typical spermatogonial morphology were incorporated into the recipient gonads and were not rejected within 22 days posttransplantation. Long-term survival of transgenic donor-derived germ cells was then verified in the gonads of 5-month-old recipients and in the milt and vitelogenic oocytes of 1-year-old recipients, by means of PCR using EGFP-specific primers. EGFP-positive milt from adult male recipients was used to fertilize non-transgenic oocytes and produced transgenic offspring expressing the donor-derived phenotype. These results imply that long-term survival, proliferation, and differentiation of the donor-derived spermatogonia into vitelogenic oocytes and functional spermatozoa are all possible. Upon further improvements in the transplantation efficiency, this intraperitoneal transplantation system could become a valuable tool in the conservation of genetic resources for cichlid species. PMID:24096828</p> <div class="credits"> <p class="dwt_author">Farlora, Rodolfo; Hattori-Ihara, Shoko; Takeuchi, Yukata; Hayashi, Makoto; Octavera, Anna; Alimuddin; Yoshizaki, Goro</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">74</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::663c6e85e64e08d1a3d409d9ec274191"> <span id="translatedtitle">Heterogeneous growth fingerlings of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: effects of density and initial size variability Crescimento heterogêneo em juvenis de Tilápia-do-Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: efeito da heterogeneidade inicial de peso e da densidade</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">In this study, the effect of initial heterogeneity of weight and density on heterogeneous growth (HetG) evaluated by the coefficient of the variation of weight in the young Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> of the territorial species was tested. <span class="hlt">Fish</span> were maintained in a glass aquarium (8 and 2 L of water) with two levels of initial heterogeneity of weight: low and high, under two density conditions: low and high, thus constituting four conditions (six replications for each). Initially, the ...</p> <div class="credits"> <p class="dwt_author">Barbosa, J. M.; Brugiolo, S. S. S.; Carolsfeld, J.; Leita?o, S. S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">75</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::afd45d1eef8c869f5e87f1b09d6d5061"> <span id="translatedtitle">Heritability of cold tolerance in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, juveniles</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The inability of tilapia to tolerate low temperatures is of major economic concern as it reduces their growing season and leads to over winter mortality. In this study, cold tolerance of juvenile Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, was investigated and heritability estimates obtained. A total of 80 maternal full-sib families were produced by mating each sire with two dams. Fry were grown in hapas suspended in earthen ponds fertilized with chicken manure, and were 41¿91 days post-hatch at th...</p> <div class="credits"> <p class="dwt_author">Charo-karisa, H.; Rezk, M. A.; Bovenhuis, H.; Komen, J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">76</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::69043733d09ece94acdd4cad0df71217"> <span id="translatedtitle">Effects of bamboo substrate and supplemental feeding on growth and production of hybrid red tilapia fingerlings (<span class="hlt">Oreochromis</span> mossambicusxOrechromis <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Periphyton growing on artificial substrates can increase the production of herbivorous <span class="hlt">fish</span> in aquaculture ponds. Periphyton may be an alternative or a complement for supplemental feed in fingerling production. Growth and production of hybrid red tilapia (<span class="hlt">Oreochromis</span> mossambicusx<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were evaluated in twelve 5x5x1-m3 concrete mud-bottomed tanks with bamboo poles for periphyton production. Submerged tank wall surface was 16 m2. There were three densities of 1.5-m bamboo poles...</p> <div class="credits"> <p class="dwt_author">Keshavanath, P.; Gangadhar, B.; Ramesh, T. J.; Dam, A. A.; Beveridge, M. C. M.; Verdegem, M. C. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">77</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::a2fcd841c09c8803b6830b3f25ab7344"> <span id="translatedtitle">Impact of Introduced Nile tilapia (<I><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></I>) on Non-native Aquatic Ecosystems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The global invasion of non-native aquatic ecosystems by Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) is well documented and coincides with their increased use as an aquaculture species. Aquaculture can be defined as the farming of <span class="hlt">fish</span> or other aquatic organisms and it varies considerably in terms of production practices. Generally, freshwater finfish, such as Nile tilapia, are reared in inland ponds (closed systems). However, in several countries, floating cages are increasingly used to rear ...</p> <div class="credits"> <p class="dwt_author">Vicente, I. S. T.; Fonseca-alves, C. E.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">78</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::61e9ebf370da6851c6865649e3e6d0b6"> <span id="translatedtitle">Effect of the establishment of dominance relationships on cortisol and other metabolic parameters in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The objective of the present study was to investigate the influence of the establishment of dominance relationships and social stress on plasma cortisol and metabolite levels in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). During the 30-day experiment, the <span class="hlt">fish</span> weighing 236 ± 29 g were kept in individual aquaria, except for two pairings lasting 6 h each. Blood samples were taken from the animals before and after pairing. Display, approach, attack, rebuff, chase flight, and coloration were carried o...</p> <div class="credits"> <p class="dwt_author">Corre?a, S. A.; Fernandes, M. O.; Iseki, K. K.; Negra?o, J. A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">79</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjn/2007/424-429.pdf"> <span id="translatedtitle">Influence of Dietary Palm Oil on Growth Response, Carcass Composition, Haematology and Organoleptic Properties of Juvenile Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available An 8-week feeding experiment was conducted to determine the effect of replacing <span class="hlt">fish</span> (codliver oil with palm oil at 0, 33.33, 66.67, 100 % for diets 1, 2, 3, 4 respectively, of Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Each diet was formulated to contain 28% crude protein and fed to triplicate groups of 10 juvenile <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (mean wt., 9.09g. <span class="hlt">Fish</span> mortality decreased with increasing palm oil substitution level. There was a significant difference (P< 0.05 in the survival of <span class="hlt">fish</span> fed Diet 4 compared with other treatments. The result showed that carcass quality of experimental <span class="hlt">fish</span> was not compromised as a result of the use of palm oil in diets. Blood parameters of <span class="hlt">fish</span> fed experimental diets showed a common trend, namely the higher the palm oil substitution level, the higher the blood parameters. Organoleptic properties of experimental <span class="hlt">fish</span> showed that palm oil replacement for <span class="hlt">fish</span> oil had no negative effect on their sensory evaluation and eating quality. The present study provides evidence that palm oil can effectively replace cod liver oil in diets for Nile Tilapia, O. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Stephen N. Ochang</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">80</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjn/2011/568-571.pdf"> <span id="translatedtitle">Nutritive Value of Dried Rumen Digesta as Replacement for Soybean in Diets of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available An eight (8 weeks experiment was carried out to determine the nutritive potential of dried rumen digesta as replacement for soybean meal in diets of Nile Tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. One hundred and fifty Nile Tilapia fingerlings were assigned to five different diets such that Dried Rumen Digesta (DRD replaced soybean meal at 0, 10, 20, 30 and 40% represented by T1, T2, T3, T4 and T5 respectively in a completely randomized design. Result showed that all <span class="hlt">fish</span> fed DRD based diets performed better than the control group. There was significant difference (p<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings without compromising growth. The trial lasted for eight (8 weeks.</p> <div class="credits"> <p class="dwt_author">V.N. Nwachukwu</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_3");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a style="font-weight: bold;">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_5");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">81</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100028&lang=en"> <span id="translatedtitle">Genotoxicity and mutagenicity of water contaminated with tannery effluents, as evaluated by the micronucleus test and comet assay using the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and chromosome aberrations in onion root-tips</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in english Cytotoxicity of metals is important because some metals are potential mutagens able to induce tumors in humans and experimental animals. Chromium can damage DNA in several ways, including DNA double strand breaks (DSBs) which generate chromosomal aberrations, micronucleus formation, sister chromatid [...] exchange, formation of DNA adducts and alterations in DNA replication and transcription. In our study, water samples from three sites in the Córrego dos Bagres stream in the Franca municipality of the Brazilian state of São Paulo were subjected to the comet assay and micronucleus test using erythrocytes from the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Nuclear abnormalities of the erythrocytes included blebbed, notched and lobed nuclei, probably due to genotoxic chromium compounds. The greatest comet assay damage occurred with water from a chromium-containing tannery effluent discharge site, supporting the hypothesis that chromium residues can be genotoxic. The mutagenicity of the water samples was assessed using the onion root-tip cell assay, the most frequent chromosomal abnormalities observed being: c-metaphases, stick chromosome, chromosome breaks and losses, bridged anaphases, multipolar anaphases, and micronucleated and binucleated cells. Onion root-tip cell mutagenicity was highest for water samples containing the highest levels of chromium.</p> <div class="credits"> <p class="dwt_author">Silvia Tamie, Matsumoto; Mário Sérgio, Mantovani; Mirtis Irene Ariza, Malaguttii; Ana Lúcia, Dias; Inês Cristina, Fonseca; Maria Aparecida, Marin-Morales.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">82</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100028"> <span id="translatedtitle">Genotoxicity and mutagenicity of water contaminated with tannery effluents, as evaluated by the micronucleus test and comet assay using the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and chromosome aberrations in onion root-tips</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Cytotoxicity of metals is important because some metals are potential mutagens able to induce tumors in humans and experimental animals. Chromium can damage DNA in several ways, including DNA double strand breaks (DSBs which generate chromosomal aberrations, micronucleus formation, sister chromatid exchange, formation of DNA adducts and alterations in DNA replication and transcription. In our study, water samples from three sites in the Córrego dos Bagres stream in the Franca municipality of the Brazilian state of São Paulo were subjected to the comet assay and micronucleus test using erythrocytes from the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Nuclear abnormalities of the erythrocytes included blebbed, notched and lobed nuclei, probably due to genotoxic chromium compounds. The greatest comet assay damage occurred with water from a chromium-containing tannery effluent discharge site, supporting the hypothesis that chromium residues can be genotoxic. The mutagenicity of the water samples was assessed using the onion root-tip cell assay, the most frequent chromosomal abnormalities observed being: c-metaphases, stick chromosome, chromosome breaks and losses, bridged anaphases, multipolar anaphases, and micronucleated and binucleated cells. Onion root-tip cell mutagenicity was highest for water samples containing the highest levels of chromium.</p> <div class="credits"> <p class="dwt_author">Silvia Tamie Matsumoto</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">83</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000400024&lang=en"> <span id="translatedtitle">Rações orgânicas suplementadas com farinha de resíduos de peixe para juvenis da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Organic diet supplemented with <span class="hlt">fish</span> residuum flour for Nile tilapia juveniles</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Objetivou-se com o presente trabalho avaliar a inclusão da farinha de resíduo da indústria de filetagem de peixes em rações orgânicas para tilápias do Nilo (O. <span class="hlt">niloticus</span>) na fase de crescimento, sobre o desempenho zootécnico (ganho de peso, conversão alimentar e sobrevivência), características de ca [...] rcaça (rendimento de carcaça, tronco limpo, filé, gordura visceral, e índice hepatossomático) e composição química (umidade, proteína bruta, matéria mineral e extrato etéreo) dos peixes. Utilizaram-se 440 tilápias com média inicial de 84,11 ± 11,56 g de peso e 16,7 ± 0,80 cm de comprimento distribuídas em 20 tanques de 8 m³, em um delineamento inteiramente casualizado com cinco tratamentos e quatro repetições. Foram elaboradas cinco rações com níveis de 0; 4; 8; 12 e 16% de inclusão de farinha de resíduos com 28% de proteína digestível e 3.100 kcal kg-1 de energia digestível. Houve aumento linear nas médias de ganho de peso e redução linear na conversão alimentar com a inclusão da farinha. Não foram observadas diferenças significativas (P > 0,05) nos parametros de rendimento corporal, na umidade e proteína bruta dos filés, porém, a matéria mineral e o extrato etéreo apresentaram diferenças (P Abstract in english This work was carried out to evaluate the inclusion of <span class="hlt">fish</span> by-product from the filleting industry in organic food for Nile tilapia (O. <span class="hlt">niloticus</span>) in the phase of growth, on livestock performance (weight gain, food conversion and survival), characteristics of carcass (carcass yield, clear trunk, fil [...] let, visceral fat and hepatosomatic index) and chemical composition (humidity, gross protein, mineral matter and ethereal extract) of <span class="hlt">fish</span>. A total of 440 tilapias with 84.11 ± 11.56 g average initial weight and 16.7 ± 0.80 cm in length, assigned into 20 8m³-aquaria, in a completely randomized design with five treatments and four replications. Four diets were prepared with levels of 0; 4; 8; 12 and 16% of <span class="hlt">fish</span> by-product meal, with 28% in digestible protein and 3,100 kcal kg-1 in digestible energy. There was a linear increase in the average of weight gain. However, no differences were observed (P 0.05) for the treatments of body yield, humidity and gross protein of fillets. The mineral matter and the ethereal extract, on the other hand, showed differences (P</p> <div class="credits"> <p class="dwt_author">Wilson Rogério, Boscolo; Arcangelo Augusto, Signor; Anderson, Coldebella; Guilherme Wolff, Bueno; Aldi, Feiden.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">84</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0121-37092011000200005&lang=en"> <span id="translatedtitle">Digestibilidad aparente de materia seca, proteína y energía de harina de vísceras de pollo, quinua y harina de pescado en tilapia nilótica, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> / Apparent digestibility of dry matter, protein and energy regarding <span class="hlt">fish</span> meal, poultry by-product meal and quinua for Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish El presente estudio se realizó con el objeto de determinar los coeficientes de digestibilidad aparente (CDA) de la proteína (CDAp) y de la energía (CDAe) de harina de pescado (HP), harina de vísceras de pollo (HVP) y harina de quinua Chenopodium quinoa (HQ), para tilapia nilótica <span class="hlt">Oreochromis</span> nilotic [...] us. Para estimar los coeficientes se utilizó el método indirecto con marcador (óxido de cromo), colectando las heces por el sistema Guelph modificado. Tilapias con peso promedio de 130 gr se alimentaron con una dieta experimental constituida por dieta referencia (DR) (89.5 %, 79.5 % ó 69.5 %), 0.5 % de marcador inerte y el ingrediente a evaluar en un nivel de inclusión de 10 %, 20 % ó 30 %. Las heces comenzaron a colectarse 10 horas después de suministrar el alimento, cada hora durante 12 horas; las muestras se secaron a una temperatura de 60ºC y se almacenaron a -17°C hasta ser analizadas. Los CDAp para los tres niveles de inclusión (10, 20 y 30 %) fueron respectivamente: 88.1, 89.4 y 90.9 % para HP; 96.8, 94.9 y 94.1 para HVP y 67.7, 73.5 y 77.5 para HQ. No se observaron diferencias significativas (p Abstract in english The purpose of this study was to determine protein (ADCp) and energy (ADCe) apparent digestibility coefficients (ADC) for <span class="hlt">fish</span> meal (FM), poultry by-product meal (PBM) and quinoa flour (Chenopodium quinoa) (QF) used in feeding Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The indirect method with a chromium [...] oxide marker was used to estimate the aforementioned ADC; faeces were collected by the modified Guelph system. Tilapias having an average 130 g weight were fed on an experimental diet consisting of reference diet (RD) (89.5 %, 79.5 % or 69.5 %), 0.5 % inert marker (chromium dioxide) and the ingredient to be evaluated to assess 10 %, 20 % or 30 % inclusion level. The <span class="hlt">fish</span> were fed every hour for 12 hours per day and their faeces were collected 10 hours after the <span class="hlt">fish</span> had been fed; the samples were dried at 60ºC and stored at -17°C until analysed. Chromium oxide level was determined by the acid digestion method. The ADCp for the three inclusion levels (10 % 20 % and 30 %) were respectively: 88.1 %, 89.4 % and 90.9 % for FM, 96.8 %, 94.9 % and 94.1 % for PBM and 67.7 %, 73.5 % and 77.5 % for QF. There were no significant differences (p 0.05); there were no significant differences between PBM inclusion levels and QF was significantly lower (10 % inclusion level).</p> <div class="credits"> <p class="dwt_author">Gutiérrez-Espinosa, Mariana C.; Yossa-Perdomo, Martha I.; Vásquez-Torres, Walter.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">85</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612006000400006&lang=en"> <span id="translatedtitle">Nutritional aspects of nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) silage / Aspectos nutricionais da silagem de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Um terço da captura mundial de pescado não é empregada para o consumo direto na alimentação humana, segue para elaboração de rações ou é desperdiçada como resíduo. O ideal seria utilizar a matéria-prima em toda a sua extensão e recuperar os subprodutos, evitando a própria formação do resíduo. Com os [...] objetivos de aumentar a receita e a eficiência de produção da indústria e, conseqüentemente, minimizar os problemas ambientais e de sanidade, provenientes do resíduo de pescado, procedeu-se à elaboração da silagem química do resíduo de beneficiamento de Tilápia-do-Nilo (Oreocrhromis <span class="hlt">niloticus</span>) após homogeneização e acidificação da biomassa com 3% de ácido fórmico: propiônico, 1:1, adição de antioxidante BHT e manutenção do pH ao redor de 4,0. Foram realizadas análises para determinação da umidade, proteína, lipídios e cinza. Os aminoácidos foram examinados em auto-analisador após hidrólise ácida, à exceção do triptofano determinado por colorimetria. A silagem de tilápia apresentou valores semelhantes ou superiores ao padrão da FAO para todos os aminoácidos essenciais, exceto para o triptofano. Os valores mais elevados encontrados foram para o ácido glutâmico, leucina e lisina. Os resultados indicam a utilização potencial da silagem, preparada a partir do resíduo de processamento da Tilápia-do-Nilo, como fonte protéica na formulação de ração para peixes, uma vez que esta apresentou teores maiores para todos os aminoácidos contidos na farinha de peixe, com exceção do triptofano. Abstract in english One third of the world's <span class="hlt">fishing</span> produce is not directly used for human consumption. Instead, it is used for making animal food or is wasted as residue. It would be ideal to use the raw material thoroughly and to recover by-products, preventing the generation of residues. With the objectives of incr [...] easing the income and the production of the industry, as well as minimizing environmental and health problems from <span class="hlt">fish</span> residue, chemical silage from Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) processing residues was developed after homogenization and acidification of the biomass with 3% formic acid: propionic, 1:1, addition of antioxidant BHT and maintenance of pH at approximately 4.0. Analyses to determine the moisture, protein, lipids and ash were carried out. The amino acids were examined in an auto analyzer after acid hydrolysis, except for the tryptophan which was determined through colorimetry. The tilapia silage presented contents that were similar to or higher than the FAO standards for all essential amino acids, except for the tryptophan. The highest values found were for glutamic acid, lysine and leucine. The results indicate a potential use of the silage prepared from the Nile tilapia processing residue as a protein source in the manufacturing of <span class="hlt">fish</span> food.</p> <div class="credits"> <p class="dwt_author">Lia Ferraz de, Arruda; Ricardo, Borghesi; Aelson, Brum; Marisa Regitano, D' Arce; Marília, Oetterer.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">86</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ccsenet.org/journal/index.php/jfr/article/view/36298"> <span id="translatedtitle">Quantification of Essential Fatty Acids and Assessment of the Nutritional Quality Indexes of Lipids in Tilapia Alevins and Juvenile Tilapia <span class="hlt">Fish</span> (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available To determine the nutritional quality of the lipid segment in tilapia (Orechromis <span class="hlt">niloticus</span> during different periods of development (alevins and juveniles, the total lipids (TL, linolenic (LNA, eicosapentaenoic (EPA, docosapentaenoic (DHA, linoleic (LA and arachidonic (AA acids were quantified , and the lipid nutritional quality indexes were calculated for the tilapia. The lipid profile showed that the species present high indexes of monounsaturated (MUFA and polyunsaturated fatty acids (PUFA in both development phases. The indexes of nutritional quality of lipids, atherogenic index (AI and thrombogenic index (TI present low values and represent beneficial health effects, both in the alevin and juvenile <span class="hlt">fish</span>. The quantifications of LNA, EPA, DHA, LA and AA show the greatest values (mg/g of total lipids for the juveniles. However, regardless of the development phase in which the tilapia is, the <span class="hlt">fish</span> may be considered a source of essential fatty acids a kind of potential and nutritional food, reflecting beneficial effects for consumer’s health. Normal 0 21 false false false PT-BR X-NONE X-NONE</p> <div class="credits"> <p class="dwt_author">Ivane Benedetti Tonial</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-03-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">87</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982000000500003&lang=en"> <span id="translatedtitle">Respostas da Tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) à atratividade e palatabilidade de ingredientes utilizados na alimentação de peixes / Response of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) to the attraction and palatability of the used ingredients in the feeding of <span class="hlt">fishes</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Avaliaram-se as respostas da tilápia do Nilo à atratividade e palatabilidade de 14 ingredientes. O método utilizado foi de dupla escolha, comparando-se cada ingrediente peletizado à uma ração controle. Foram empregados quatro aquários (750 litros) contendo, cada um, três alevinos e dois comedouros i [...] nstalados nos cantos direito e esquerdo, sendo registrados tempo decorrido entre colocação do ingrediente e chegada dos animais aos comedouros, freqüência de visitas aos comedouros, número de grânulos ingeridos e freqüência de ejeções. Os tratamentos foram comparados pela prova não-paramétrica de Kruskal-Wallis e a comparação dos ingredientes para o conjunto de variáveis, por intermédio da "Análise de Agrupamento" e "Análise de Componentes Principais". Os ingredientes foram assim classificados: a) baixa atrato-palatabilidade = farelos de trigo, soja e algodão, farinha e raspa de mandioca, farinha de girassol e fubá de milho, b) média atrato-palatabilidade = levedura de cana-de-açúcar e glúten de milho e c) alta atrato-palatabilidade = ovo integral liofilizado, farinhas de crisálidas, peixes, carne e camarão. Ingestão de grânulos (manhã e tarde) e freqüência de visitas aos comedouros (tarde) foram consideradas as variáveis mais discriminatórias e freqüência de ejeção de grânulos e tempo gasto para aproximação dos comedouros (manhã e tarde), as menos discriminatórias. As respostas comportamentais dos peixes variaram de acordo com o ingrediente apresentado. A avaliação do grau de atrato-palatabilidade deve ser realizada considerando-se uma combinação de parâmetros. Abstract in english The response of Nile tilapia to the attraction and palatability of 14 ingredients was evaluated. The two-choice method was used, comparing each pelleted ingredient to a control diet. It was utilized Four aquaria (750 liters) containing in each one three fingerlings and two feed containers at the rig [...] ht and left corner, being recorded the elapsed time between the lay of the ingredient and the arrive of the fingerlings to feed containers, visiting frequency to the feed containers, amount of ingested pellets and ejections frequency. The treatments were compared by non-parametric method of Kruskal-Wallis and the comparison of the ingredients for the variable set using "Grouping Analysis" and "Principal Components Analysis". The numbers of ingested pellets (at morning and at afternoon) and the visiting frequency to feed containers (at afternoon) were considered the most discriminatory variables. The ingredients were classified as it follows: a) low attraction and palatability = wheat meal, soybean meal, cottonseed meal, cassava meal, cassava scrapings, sunflower meal and corn meal), b) medium attraction and palatability = sugar-cane yeast and corn gluten meal and c) high attraction and palatability = integral lyophilized egg, silk worm meal, <span class="hlt">fish</span> meal, meat meal, shrimp meal. The frequency of ejected pellets and time spent to approach of the feed (at morning and at afternoon) were considered the least discriminatory variables. The behavior response of <span class="hlt">fishes</span> changes according to the presented ingredient. The attraction and palatability extent must be studied considering combinations of variables.</p> <div class="credits"> <p class="dwt_author">Elyara Maria, Pereira-da- Silva; Luiz Edivaldo, Pezzato.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">88</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982000000500003"> <span id="translatedtitle">Respostas da Tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> à atratividade e palatabilidade de ingredientes utilizados na alimentação de peixes Response of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> to the attraction and palatability of the used ingredients in the feeding of <span class="hlt">fishes</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Avaliaram-se as respostas da tilápia do Nilo à atratividade e palatabilidade de 14 ingredientes. O método utilizado foi de dupla escolha, comparando-se cada ingrediente peletizado à uma ração controle. Foram empregados quatro aquários (750 litros contendo, cada um, três alevinos e dois comedouros instalados nos cantos direito e esquerdo, sendo registrados tempo decorrido entre colocação do ingrediente e chegada dos animais aos comedouros, freqüência de visitas aos comedouros, número de grânulos ingeridos e freqüência de ejeções. Os tratamentos foram comparados pela prova não-paramétrica de Kruskal-Wallis e a comparação dos ingredientes para o conjunto de variáveis, por intermédio da "Análise de Agrupamento" e "Análise de Componentes Principais". Os ingredientes foram assim classificados: a baixa atrato-palatabilidade = farelos de trigo, soja e algodão, farinha e raspa de mandioca, farinha de girassol e fubá de milho, b média atrato-palatabilidade = levedura de cana-de-açúcar e glúten de milho e c alta atrato-palatabilidade = ovo integral liofilizado, farinhas de crisálidas, peixes, carne e camarão. Ingestão de grânulos (manhã e tarde e freqüência de visitas aos comedouros (tarde foram consideradas as variáveis mais discriminatórias e freqüência de ejeção de grânulos e tempo gasto para aproximação dos comedouros (manhã e tarde, as menos discriminatórias. As respostas comportamentais dos peixes variaram de acordo com o ingrediente apresentado. A avaliação do grau de atrato-palatabilidade deve ser realizada considerando-se uma combinação de parâmetros.The response of Nile tilapia to the attraction and palatability of 14 ingredients was evaluated. The two-choice method was used, comparing each pelleted ingredient to a control diet. It was utilized Four aquaria (750 liters containing in each one three fingerlings and two feed containers at the right and left corner, being recorded the elapsed time between the lay of the ingredient and the arrive of the fingerlings to feed containers, visiting frequency to the feed containers, amount of ingested pellets and ejections frequency. The treatments were compared by non-parametric method of Kruskal-Wallis and the comparison of the ingredients for the variable set using "Grouping Analysis" and "Principal Components Analysis". The numbers of ingested pellets (at morning and at afternoon and the visiting frequency to feed containers (at afternoon were considered the most discriminatory variables. The ingredients were classified as it follows: a low attraction and palatability = wheat meal, soybean meal, cottonseed meal, cassava meal, cassava scrapings, sunflower meal and corn meal, b medium attraction and palatability = sugar-cane yeast and corn gluten meal and c high attraction and palatability = integral lyophilized egg, silk worm meal, <span class="hlt">fish</span> meal, meat meal, shrimp meal. The frequency of ejected pellets and time spent to approach of the feed (at morning and at afternoon were considered the least discriminatory variables. The behavior response of <span class="hlt">fishes</span> changes according to the presented ingredient. The attraction and palatability extent must be studied considering combinations of variables.</p> <div class="credits"> <p class="dwt_author">Elyara Maria Pereira-da- Silva</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">89</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500023&lang=en"> <span id="translatedtitle">Gill histopathological alterations in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to treated sewage Water</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Tilápias adultas, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, de ambos os sexos foram expostas em águas residuais de uma estação de tratamento de esgoto durante 4 dias. Amostras de brânquia foram recolhidas após 24, 48, 72 e 96 h e as alterações histopatológicas foram analisadas por microscopia óptica e eletrônica de va [...] rredura. O epitélio da brânquia do grupo controle apresentou uma morfologia similar à de outros peixes teleosteos, enquanto foram observadas lesões nos peixes expostos. As principais alterações histopatológicas foram edema, destacamento dos epitélios lamelar e filamentar e fusão lamelar. Os peixes expostos às águas residuais mostraram também proliferação celular com consequente aumento da espessura do filamento branquial. A severidade das lesões aumentou com o tempo de exposição, nomeadamente a hiperplasia das células epiteliais com proliferação do epitélio filamentar e fusão das lamelas observadas preferencialmente às 96 h. Adicionalmente, alguns dos resultados obtidos pela análise em microscopia de luz foram confirmados com o recurso da microscopia eletrônica de varredura. Abstract in english Adult Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, of both sexes were exposed in wastewater from a sewage treatment plant for a period of 4 days. Gill samples were collected after 24, 48, 72 and 96 h and histopathological changes were analyzed by light and scanning electronic microscopy. Gill epithelium of [...] control O. <span class="hlt">niloticus</span> (freshwater group) was similar to that of other teleosts, while histopathological lesions were observed in exposed <span class="hlt">fishes</span>. The main histopathological changes were edema, lifting of lamellar and filamentar epithelia and lamellar fusion. Cell proliferation with consequent thickening of the filament epithelium was also found in <span class="hlt">fishes</span> exposed to the treated sewage water. The severity of the lesions increased with the time of exposure, namely the hyperplasia of the epithelial cells with proliferation of filamentar epithelium and fusion of lamellae observed at 96 h. Additionally, several histopathological results obtained by light microscopy were confirmed through scanning microscopy.</p> <div class="credits"> <p class="dwt_author">Fontaínhas-Fernandes, António; Luzio, Ana; Garcia-Santos, Sofia; Carrola, João; Monteiro, Sandra.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">90</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500023"> <span id="translatedtitle">Gill histopathological alterations in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to treated sewage Water</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Adult Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, of both sexes were exposed in wastewater from a sewage treatment plant for a period of 4 days. Gill samples were collected after 24, 48, 72 and 96 h and histopathological changes were analyzed by light and scanning electronic microscopy. Gill epithelium of control O. <span class="hlt">niloticus</span> (freshwater group was similar to that of other teleosts, while histopathological lesions were observed in exposed <span class="hlt">fishes</span>. The main histopathological changes were edema, lifting of lamellar and filamentar epithelia and lamellar fusion. Cell proliferation with consequent thickening of the filament epithelium was also found in <span class="hlt">fishes</span> exposed to the treated sewage water. The severity of the lesions increased with the time of exposure, namely the hyperplasia of the epithelial cells with proliferation of filamentar epithelium and fusion of lamellae observed at 96 h. Additionally, several histopathological results obtained by light microscopy were confirmed through scanning microscopy.Tilápias adultas, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, de ambos os sexos foram expostas em águas residuais de uma estação de tratamento de esgoto durante 4 dias. Amostras de brânquia foram recolhidas após 24, 48, 72 e 96 h e as alterações histopatológicas foram analisadas por microscopia óptica e eletrônica de varredura. O epitélio da brânquia do grupo controle apresentou uma morfologia similar à de outros peixes teleosteos, enquanto foram observadas lesões nos peixes expostos. As principais alterações histopatológicas foram edema, destacamento dos epitélios lamelar e filamentar e fusão lamelar. Os peixes expostos às águas residuais mostraram também proliferação celular com consequente aumento da espessura do filamento branquial. A severidade das lesões aumentou com o tempo de exposição, nomeadamente a hiperplasia das células epiteliais com proliferação do epitélio filamentar e fusão das lamelas observadas preferencialmente às 96 h. Adicionalmente, alguns dos resultados obtidos pela análise em microscopia de luz foram confirmados com o recurso da microscopia eletrônica de varredura.</p> <div class="credits"> <p class="dwt_author">António Fontaínhas-Fernandes</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">91</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::ae88ababf5071cb1e8c11d65cf0ab0d5"> <span id="translatedtitle">Verification of contamination by dimetoato and aldicarb in liver of Nile tilapias (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) collected in two cold-storages in the State of Paraná / <br> Verificação da contaminação por dimetoato e aldicarb em fígado de tilápias do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) coletados em dois frigoríficos do Estado do Paraná</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The importance of <span class="hlt">fish</span> as a protein source in food is unquestionable, but its role as an indicator of environmental contamination is also very important. This study aimed to analysis the livers of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), collected from commercial cold-storages in two municipal districts in the State of Parana, for investigation of contamination by organophosphorus compounds and carbamates. It was collected 30 samples of Nile tilapias (O. <span class="hlt">niloticus</span>) liver in the cold-storage A an...</p> <div class="credits"> <p class="dwt_author">Mari Sylmara Martins Rodrigues; Cristina Arduini Cavalcanti de Arruda; Daisy Pontes Netto; Alexandre Nabuhiro Tajiri</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">92</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::b1c8f426fab97e62fb3752fcbb7a3c29"> <span id="translatedtitle">Effect of Crowding Stress on Some Physiological Functions of Nile Tilapia, <I><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></I> (L.) Fed Different Dietary Protein Levels</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary"><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) Fed dietary protein levels to chronic stress induced by doubling <span class="hlt">fish</span> density. In this study, Nile tilapia (15?1 g) was randomly distributed into the aquaria at a rate of 15 or 30 <span class="hlt">fish</span>/100 L. The temperature was adjusted at 27?1?C. <span class="hlt">Fish</span> of each density were fed either a diet containing 25, 35 or 45% Crude Protein (CP) with a feeding rate of 3% of life body weight twice daily for two...</p> <div class="credits"> <p class="dwt_author">Mohsen Abdel-Tawwab; Mousa, Mamdouh A. A.; Sharaf, Safaa M.; Ahmad, Mohammad H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">93</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200020&lang=en"> <span id="translatedtitle">Reproductive strategy of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Costa Rica | Language: English Abstract in spanish Estudiamos la tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus) en la reserva de Opa, Nigeria, desde octubre 1997 hasta febrero del 2000. Recolectamos 1 430 especímenes con red lanzada y red de arrastre. El diámetro de los huevos varía entre los 2.12 mm y 2.69 mm con un promedio de 2.47±0.02. El índice gona [...] dosomático de las hembras fue de 1.34±0.01 (0.12-4.06, n= 637), y en machos fue de 0.39±0.02 (0.03-1.67, n= 789). En la reserva este pez se reprodujo durante todo el periodo de estudio. Hay cuido materno: la hembra lleva los huevos y alevines en la boca. La proporción machos/hembras fue aproximadamente 1:1. La fecundidad varía entre 73 y 1 810 huevos por hembra con un promedio de 815 huevos. Abstract in english The <span class="hlt">fish</span> family Cichlidae has a large diversity and dominates African freshwater bodies, with over 200 species reported in inland waters. Sampling for the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus) in Opa reservoir, Nigeria, started in October 1997 and extended until February 2000. The <span class="hlt">fishing</span> methods em [...] ployed for collecting the 1 430 specimens were cast netting and gillnetting. Egg diameter varied between 2.12 mm and 2.69 mm with a mean of 2.47±0.02. Female gonadosomatic index was 1.34±0.01 (0.12-4.06, n= 637). The male gonadosomatic index was 0.39±0.02 (0.03-1.67, n= 789). In Opa reservoir, O. <span class="hlt">niloticus</span> bred throughout the study period. The species was a maternal mouth brooder with the female <span class="hlt">fish</span> carrying eggs and fry in the buccal cavities. The sex ratio of O. <span class="hlt">niloticus</span> was approximately 1:1 in the reservoir. The fecundity of the species was between 73 eggs and 1 810 eggs per female with a mean fecundity of 815 eggs. Rev. Biol. Trop. 55 (2): 595-602. Epub 2007 June, 29.</p> <div class="credits"> <p class="dwt_author">Komolafe, O.O; Arawomo, G.A.O.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">94</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442007000200020"> <span id="translatedtitle">Reproductive strategy of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces: Cichlidae in Opa reservoir, Ile-Ife, Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The <span class="hlt">fish</span> family Cichlidae has a large diversity and dominates African freshwater bodies, with over 200 species reported in inland waters. Sampling for the <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus in Opa reservoir, Nigeria, started in October 1997 and extended until February 2000. The <span class="hlt">fishing</span> methods employed for collecting the 1 430 specimens were cast netting and gillnetting. Egg diameter varied between 2.12 mm and 2.69 mm with a mean of 2.47±0.02. Female gonadosomatic index was 1.34±0.01 (0.12-4.06, n= 637. The male gonadosomatic index was 0.39±0.02 (0.03-1.67, n= 789. In Opa reservoir, O. <span class="hlt">niloticus</span> bred throughout the study period. The species was a maternal mouth brooder with the female <span class="hlt">fish</span> carrying eggs and fry in the buccal cavities. The sex ratio of O. <span class="hlt">niloticus</span> was approximately 1:1 in the reservoir. The fecundity of the species was between 73 eggs and 1 810 eggs per female with a mean fecundity of 815 eggs. Rev. Biol. Trop. 55 (2: 595-602. Epub 2007 June, 29.Estudiamos la tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus en la reserva de Opa, Nigeria, desde octubre 1997 hasta febrero del 2000. Recolectamos 1 430 especímenes con red lanzada y red de arrastre. El diámetro de los huevos varía entre los 2.12 mm y 2.69 mm con un promedio de 2.47±0.02. El índice gonadosomático de las hembras fue de 1.34±0.01 (0.12-4.06, n= 637, y en machos fue de 0.39±0.02 (0.03-1.67, n= 789. En la reserva este pez se reprodujo durante todo el periodo de estudio. Hay cuido materno: la hembra lleva los huevos y alevines en la boca. La proporción machos/hembras fue aproximadamente 1:1. La fecundidad varía entre 73 y 1 810 huevos por hembra con un promedio de 815 huevos.</p> <div class="credits"> <p class="dwt_author">O.O Komolafe</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">95</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2910"> <span id="translatedtitle">Apparent phosphorus availability in food for the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Disponibilidade aparente de fósforo em ingredientes pela tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Apparent availability of phosphorus from various foodstuffs for sexually reversed Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was provided. <span class="hlt">Fish</span> with an average weight of 16.0 ? 0.5g were randomly stocked in 21 aquariums equipped with feces collector (Guelf system, at the rate of five <span class="hlt">fish</span> per aquarium. Each set of three aquariums was provided with a biological filter, aeration and flowing water (0.75 L/min discharge. An egg albumin-gelatin purified diet containing 0.1% chromic oxide was used as reference and basal diet. Dicalcium phosphate, bone and <span class="hlt">fish</span> meals, soybean and wheat bran and middlings were added to the basal diet at 3.5, 6.0, 21.67, 40.0, 12.0 and 10.62% respectively, at the expense of albumin, gelatin and dextrose. Dicalcium phosphate was the best phosphorus source (apparent availability of 74.23% for tilapia fingerlings. In decreasing order it was followed by bone and soybean meals (54.59 and 35.13%, wheat middlings (30.49%, <span class="hlt">fish</span> meal (27.15% and corn meal (7.33%. Whereas <span class="hlt">fish</span> meal had the lowest apparent phosphorus availability among animal foodstuff, soybean meal was the best among plant foodstuffs.Foi determinada a disponibilidade aparente do fósforo de ingredientes alimentares para a tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Foram utilizados 105 alevinos, revertidos, com peso vivo inicial médio de 16,0 ? 0,5g. Foram distribuídas, cinco por aquário em 21 unidades de fibra de vidro (80L e sistema Guelf para coleta de fezes. Cada conjunto, constituído de três aquários, foi dotado de aeração, filtro biológico e fluxo contínuo (vazão de 0,75 L/mim. Foram avaliados o fosfato bicálcico, as farinhas de osso e de peixe, os farelos de soja e de trigo e fubá de milho, os quais substituíram parte de uma dieta purificada, usada como referência, marcada com óxido de crômio. Ao final, pode-se concluir: o fosfato bicálcico, disponibilidade aparente de 74,24%, deve ser a fonte preferencial de fósforo nas rações; a farinha de osso (54,59% apresenta-se como fonte alternativa; a de peixe apresentou baixa disponibilidade (27,15% e, dentre os produtos de origem vegetal, o farelo de soja apresentou a melhor (35,13%, e os farelos de trigo (30,49% e de milho, a pior disponibilidade (7,33%.</p> <div class="credits"> <p class="dwt_author">Edma Carvalho de Miranda</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">96</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::f092341e76614da6d33605a3cdda4037"> <span id="translatedtitle">Is growth retardation present in Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> cultured in low water exchange recirculating aquaculture systems?</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">It has been suggested that <span class="hlt">fish</span> cultured in recirculating aquaculture systems (RAS) grow less as compared with <span class="hlt">fish</span> cultured in flow-through systems due to the accumulation of substances. In the Netherlands, the commercial culture of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in 300 and 600 MT's systems is done exclusively in RAS operated at water exchange ratesas low as 30 L/kg feed/day due to nitrate control by single-sludge denitrification reactors. The use of such nearly closed RAS raises the que...</p> <div class="credits"> <p class="dwt_author">Martins, C. I.; Ochola, D.; Ende, S. S. W.; Eding, E. H.; Verreth, J. A. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">97</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982003000200002"> <span id="translatedtitle">Fibra bruta para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L Crude fiber for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Este experimento objetivou avaliar diferentes níveis de fibra bruta no desempenho e no tempo de retenção do bolo alimentar em alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L. Foram utilizados 125 alevinos (1,39 ± 0,03 g distribuídos em 25 aquários de 54 L, em um delineamento inteiramente casualizado, com cinco tratamentos e cinco repetições. Foram formuladas cinco rações isoenergéticas (3000 kcal/kg de energia digestível e isoprotéicas (30% de proteína bruta, diferindo quanto aos níveis de fibra bruta (3,65; 4,75; 6,00; 7,25 e 8,50%. O período experimental foi de 64 dias a uma temperatura média de 26,5ºC ± 0,8 de manhã e 27,5ºC ± 0,7 à tarde. Não foram observadas diferenças quanto ao desempenho dos alevinos, entretanto houve decréscimo linear para o tempo de retenção do bolo alimentar com o aumento da fibra.This work aimed to evaluate different crude fiber levels on reverted Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L fingerlings performance and time of retention of food. One hundred and twenty-five fingerlings of Thai strain, 1.39 ± 0.03 g of initial weight were allotted to twenty-five 54 L aquarium, at five treatments and five replications on completely randomized design. Five isoenergy (3000 kcal/kg of digestible energy and isoprotein (30% of crude protein diets were formulated with five different crude fiber levels (3.65, 4.75, 6.00, 7.25 and 8.50%, for ranging cellulose and inert material addition. The experimental period was 64 days with 26.5ºC ± 0.8 in the morning and 27.5ºC ± 0.7 in the afternoon temperatures. No difference was observed to fingerlings performance (food conversion, final weight, weight gain, but a linear decrease to time of retention of food with crude fiber addition.</p> <div class="credits"> <p class="dwt_author">Fábio Meurer</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">98</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000500038&lang=en"> <span id="translatedtitle">Exigência de lisina pela Tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), na fase de terminação / Lysine requirement of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), for grow-out phase</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese O presente estudo foi realizado para determinar a exigência de lisina pela tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Setenta e dois peixes revertidos sexualmente e com peso vivo médio inicial de 117,9 ± 0,67g foram alimentados por 50 dias com quatro rações (25% proteína bruta e 3090kcal de energia di [...] gestível kg-1) contendo diferentes teores de inclusão de L-Lisina HCl: 0,1; 0,3; 0,5 e 0,7%, correspondente a rações com 1,13; 1,27; 1,42 e 1,57% de lisina, respectivamente. Os peixes foram distribuídos em 12 tanques com volume de 1000L cada, num delineamento inteiramente casualizado com quatro tratamentos, três repetições e seis peixes por unidade experimental. Não foram observadas diferenças na temperatura, pH, oxigênio dissolvido, condutividade elétrica e transparência da água nos diferentes tratamentos. Não foi observado efeito (P>0,05) dos teores de inclusão de lisina sobre a taxa de sobrevivência, conversão alimentar, gordura visceral, índice hepato-somático e rendimento de carcaça. Foi observado efeito quadrático (P Abstract in english The present study was carried out to determine the lysine requirement for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Seventy two reversed <span class="hlt">fish</span> with average weight initial of 117.9 ± 0.67g were for by 50 days with four diets (25% of crude protein and 3090kcal kg-1 of digestible energy) containing differen [...] t values of inclusion of L-Lysine HCl: 0.1; 0.3; 0.5 and 0.7%, corresponding to rations with 1.13; 1.27; 1.42 and 1.57% of lysine, respectively. <span class="hlt">Fish</span> were distributed in 12 tanks of 1000-L each, in a completely randomized design with four treatments, three replicates and six <span class="hlt">fish</span> per experimental unit. No differences were observed in the temperature, pH, dissolved oxygen and electric conductivity of the water in the different treatments. No effects (P>0.05) of lysine inclusion were observed on survival rate, feed conversion, visceral fat, hepatosomatic index and carcass yield. There was no sign of quadratic effect (P</p> <div class="credits"> <p class="dwt_author">Wilson Massamitu, Furuya; Daniele, Botaro; Patrícia Ribeiro, Neves; Lilian Carolina Rosa, Silva; Carmino, Hayashi.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">99</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4436"> <span id="translatedtitle">Comportamento alimentar da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> frente a diferentes ingredientes alimentares Alimentary ingredients and the feeding behavior of Nile tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Foram avaliadas as respostas comportamentais da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> frente a 14 ingredientes utilizados na alimentação de peixes: farinhas de carne, de peixe, de crisálidas, de camarão, de girassol, de algodão e de mandioca, ovo integral liofilizado, levedura de cana-de-açúcar, farelos de soja e de trigo, glúten de milho, fubá de milho e raspa de mandioca. O método utilizado foi de dupla escolha, comparando-se cada ingrediente peletizado a uma ração denominada controle. Foram empregados quatro aquários (750 litros, contendo, cada um, três alevinos e dois comedouros instalados nos cantos direito e esquerdo, sendo registradas as respostas dos animais para cada ingrediente, separadamente. Concluiu-se que as respostas comportamentais da tilápia variam de acordo com o ingrediente oferecido e que parece existir uma correlação positiva entre o grau de atrato-palatabilidade de um ingrediente e a ocorrência de confrontos agonísticos entre os indivíduos. Sugere-se que ingredientes classificados como de alta atrato-palatabilidade (farinhas de crisálidas, de peixe, de carne, de camarão e ovo liofilizado integral sejam adicionados às dietas especiais para peixes, visando ao aumento da ingestão alimentar nos períodos pré-invernais, situações de estresse ou estados patológicos.Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> responses to attractivity and taste of fourteen food ingredients, here classified as animal sources (shrimp, <span class="hlt">fish</span>, silkworm and meat meal, integral lyophilized egg and sugar-cane-yeast, vegetable protein sources (maize gluten, soybean bran, sunflower meal and cotton bran and energetics (maize flour, manioc scraping, manioc bran and wheat bran were investigated. These ingredients were compared to a control diet, using a two-choice method. Four 750 liters aquaria stocked with three fries each and two feeders installed respectively at the right and left corner where used to register the responses of the fries to each ingredient separately. The results showed that behavioral patterns of the fries change according to the type of ingredient and that three seems to be a positive correlation between the attractivity and taste degree and the occurrence of agonistic behavior in the studied species. It may be suggested that the most attractive and tasty ingredients (silkworm, <span class="hlt">fish</span>, meat and shrimp meal, and integral lyophilized egg be added to special <span class="hlt">fish</span> diets, in order to increase food consumption in pre-hibernal periods and under stress and pathological conditions.</p> <div class="credits"> <p class="dwt_author">Elyara Maria Pereira-da-Silva</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">100</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S0004-05922010000200004&lang=en"> <span id="translatedtitle">Desempenho de tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) suplementada com vitamina E / Performance of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) supplemented with vitamin E</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Spain | Language: Portuguese Abstract in portuguese Objetivou-se avaliar a suplementação de Vitamina E no desempenho e qualidade de carcaça de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Os experimentos foram conduzidos no ranário experimenta do Departamento de Biologia Animal, UFV, Viçosa, Minas Gerais, Brasil, no período de 09/01/ 2005 a 25/04/2005, t [...] otalizando 106 dias. Foram utilizadas 400 pós larvas revertidas (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)em um experimento com um delineamento inteiramente ao acaso com cinco tratamentos (0, 50, 100, 150 e 200 mg/kg de vitamina E monofosfato) numa ração isoproteíca 36% de PB e isocalórica 3600 kcal de ED/kg com quatro repetições. Não se observou efeito significativo para peso final, para ganho de peso total, para ganho de peso diário dos animais, para taxa de eficiência protéica e para taxa de sobrevivência. Para o índice viscerossomático houve diferença significativa para o tratamento sem suplementação, com 100 mg e com 150 mg/kg desta vitamina. Para o ácido graxo oléico (C18:1) a utilização do tratamento sem vitamina E foi significamente maior em relação aos outros tratamentos. O ácido graxo eicosapentaenóico EPA (C20:5?3) foi estatisticamente significativo para o tratamento sem suplementação de vitamina E. O ácido graxo linoléico (C18:2?6), ácido graxo ?-linolênico (C18:3?6), ácido graxo ?-linoléico (C18:3?3) e ácido graxo araquidônico (C20:4?6) aumentaram de forma quadrática até o nível estimado de 110 mg, 111 mg, 113 mg e 140 mg de vitamina E por kg de ração, respectivamente. Abstract in english The effect of vitamin E supplementation on performance and carcass quality of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The research was carried out in the experimental frog raising facilities at the Department of Animal Biology, UFV, Minas Gerais state, Brazil. Four hundred post larva reversed (Oreochr [...] omis <span class="hlt">niloticus</span>) were used for studies. The experiments were randomly designed with five treatments (supplying 0, 50, 100, 150, and 200 mg/kg of vitamin E mono-phosphate) in an isoproteic ration with 36% CP and isocaloric with 3600 kcal/kg of DE with four repetitions. It was not observed significant effect for final weight, total weight gain, daily weight gain, protein efficiency rate and survivor rate. The viscerosomatic index showed significant differences for the treatment without vitamin E supplementation and with 100 and 150 mg of this vitamin. For oleic fatty acid, the treatment without vitamin E was significantly higher. The eicosapen-taenoic fatty acid (C20:5?3) was statistically significant for the treatment without vitamin E. The fatty acids linoleic (C18:2?6), ?-linolenic (C18:3?6), ?-linoleic (C18:3?3), and arachidonic (C20:4?6) increased in a quadratic way up to the estimated levels of 110 mg, 111mg, 113 mg, and 140 mg of vitamin E/kg of ration, respectively.</p> <div class="credits"> <p class="dwt_author">Navarro, R.D.; Ferreira, W.M.; Ribeiro Filho, O.P.; Veloso, D.P.; Fontes, D.O.; Silva, R.F..</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_4");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a style="font-weight: bold;">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_6");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">101</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0121-37092012000100007&lang=en"> <span id="translatedtitle">Requerimientos nutricionales para Tilapia del Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) nutritional requirements / Exigências nutricionais para tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">Niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Colombia | Language: Spanish Abstract in portuguese Estarevisão foi realizada com o objetivo de recolher informação dos recentesavanços sobre as exigências de alguns nutrientes para a tilápia Nilótica (Oreochromisniloticus).Asexigências de proteína bruta estão sendo substituídas pela exigência especificade aminoácidos, como no caso da lisina e da met [...] ionina, aplicando o conceito deproteína ideal. Asexigências nutricionais da tilápia do Nilo recomendadas pelo NRC (1993),diferem em algumas quantidades das exigências nutricionais estimadas paratilápia em condições tropicais. O fornecimento de ração atendendo as exigênciasde nutrientes para as diferentes fases de vida da tilápia permite obter ótimosrendimentos no ganho de peso e na conversão alimentar, garantindo um statussanitário alto na produção desta espécie. Abstract in spanish Estarevisión fue realizada con objetivo de acopiar información de los recientesavances sobre los requerimientos de algunos nutrientes para la tilapianilótica(Oreochromisniloticus). Los requerimientos de proteína bruta, estánsiendo substituidos por el requerimiento específico de aminoácidos, como en [...] elcaso de lisina y metionina, aplicando el concepto de proteína ideal. Losrequerimientos nutricionales de tilapia delNilo sugeridos por NRC (1993),difieren en algunas cantidades a los requerimientos nutricionales estimadospara tilapia en condiciones tropicales. El suministro de raciones atendiendolas exigencias de nutrientes para las diferentes fases de vida de la tilapia,permite obtener óptimos rendimientos en ganancia de peso y conversiónalimenticia, garantizando un status sanitario alto en la producción de estaespecie. Abstract in english The purpose of this review was tocompile information regarding recent advances concerning some Nile tilapia (<span class="hlt">OreochromisNiloticus</span>) nutrient requirements. The raw protein requirements are beingsubstituted for specific amino acid requirements, such as lysine andmethionine, applying the ideal protein c [...] oncept. Nile tilapia"s nutritionalrequirements suggested by NRC (1993) differ by some amounts from thenutritional requirements estimated for tilapia in tropical conditions. Thesupply of rations attending to the nutrient demand from the different phases oftilapia"s lifecycle lead to optimum yield being obtained regarding weight gainand feed conversion, guaranteeing high sanitary status when producingthis specie.</p> <div class="credits"> <p class="dwt_author">Torres-Novoa, Diana M.; Hurtado-Nery, Víctor L..</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">102</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://revistas.unicordoba.edu.co/revistamvz/mvz-171/V17N1A2.pdf"> <span id="translatedtitle">Protozoan and metazoan parasites of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> cultured in Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Objective. This study describes the parasitic fauna and relative condition factor (Kn in Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. (Cichlidae from <span class="hlt">fish</span> farms in the State of Amapá. Material and methods. 123 <span class="hlt">fish</span> from four <span class="hlt">fish</span> farms in the state of Amapá, Brazil were necropsied for parasitological and Kn analysis. Results. 64.2% of the examined <span class="hlt">fish</span>, had the gills infected with Cichlidogyrus tilapiae Paperna, 1960 (Monogenoidea: Dactylogyridae; Ichthyophthirius multifiliis Fouquet, 1876 (Protozoa: Ciliophora, Trichodina Ehrenberg, 1830 and Paratrichodina africana Kazubski & El-Tantawy, 1986 (Protozoa: Trichodinidae. The highest prevalence found corresponded to Monogenoidea C. tilapiae while the lowest corresponded to Trichodinidae. However, I. multifiliis was the parasite that presented the greatest intensity and abundance. The differences found in the infection rates of the different <span class="hlt">fish</span> farms due to causes further discussed. The parasitism did not influence the relative condition factor (Kn of <span class="hlt">fish</span>. This was the first record of P. africana in Brazil and occurred in the Eastern Amazon. Conclusions. In Brazil, Lamproglena sp. is an emerging parasite in the Southern and Southeastern regions, but this crustacean was not found in the Nile tilapia in the State of Amapá. The parasitic infections in Nile tilapia farmed in Brazil are caused by protozoan, monogenoidea, crustacea and digenea species, and the regional differences on their prevalence and intensity rates are discussed in this study.</p> <div class="credits"> <p class="dwt_author">Wanderson Pantoja MF</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">103</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100014&lang=en"> <span id="translatedtitle">Growth of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different levels of alcohol yeast / Crescimento das tilápias do Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentadas com diferentes níveis de levedura alcooleira</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Foram utilizados 240 alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), com 45 dias, sexualmente revertidos com peso médio inicial de 1,25 ± 0,14 g, distribuídos em um delineamento inteiramente casualizado, durante 330 dias. O desempenho da substituição de 10%, 20% e 30% da ração por levedura de d [...] estilaria (Saccharomyces cerevisiae) em rações experimentais balanceadas sobre o desenvolvimento na criação de tilápia do Nilo não mostrou efeito prejudicial até o nível máximo testado de 30%, indicando que a escolha do nível de levedura na ração para estes peixes depende de sua disponibilidade e custo ocasional. A levedura proporcionou aos peixes boa resistência às condições ambientais desfavoráveis, o que foi constatado pela não diferença estatística entre os tratamentos com diferentes níveis de levedura e o controle. O baixo índice de crescimento em comprimento e peso pode ser atribuído ao pouco espaço disponível por exemplar, não obedecendo o limite de densidade populacional, e uma diminuição da ingestão de alimentos coincidindo com o período de inverno, além da ausência de alimentação natural. Abstract in english Two hundred and forty 45-day-old fingerlings of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), sexually reverted with an initial average weight of 1.25 ± 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery ye [...] ast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these <span class="hlt">fishes</span> depends on the availability and occasional cost. The yeast provides <span class="hlt">fish</span> with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the treatments with different levels of yeast and the witness. The long growth rate in terms of length and weight can be attributed to the little available space for each specimen, not obeying the limit of populational density, as well as reduction of food ingestion, which coincide with the winter season, above of the absence of natural feeding.</p> <div class="credits"> <p class="dwt_author">V., MEDRI; G. V., PEREIRA; J. H., LEONHARDT.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">104</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100014"> <span id="translatedtitle">Growth of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different levels of alcohol yeast Crescimento das tilápias do Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentadas com diferentes níveis de levedura alcooleira</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Two hundred and forty 45-day-old fingerlings of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, sexually reverted with an initial average weight of 1.25 ± 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these <span class="hlt">fishes</span> depends on the availability and occasional cost. The yeast provides <span class="hlt">fish</span> with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the treatments with different levels of yeast and the witness. The long growth rate in terms of length and weight can be attributed to the little available space for each specimen, not obeying the limit of populational density, as well as reduction of food ingestion, which coincide with the winter season, above of the absence of natural feeding.Foram utilizados 240 alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, com 45 dias, sexualmente revertidos com peso médio inicial de 1,25 ± 0,14 g, distribuídos em um delineamento inteiramente casualizado, durante 330 dias. O desempenho da substituição de 10%, 20% e 30% da ração por levedura de destilaria (Saccharomyces cerevisiae em rações experimentais balanceadas sobre o desenvolvimento na criação de tilápia do Nilo não mostrou efeito prejudicial até o nível máximo testado de 30%, indicando que a escolha do nível de levedura na ração para estes peixes depende de sua disponibilidade e custo ocasional. A levedura proporcionou aos peixes boa resistência às condições ambientais desfavoráveis, o que foi constatado pela não diferença estatística entre os tratamentos com diferentes níveis de levedura e o controle. O baixo índice de crescimento em comprimento e peso pode ser atribuído ao pouco espaço disponível por exemplar, não obedecendo o limite de densidade populacional, e uma diminuição da ingestão de alimentos coincidindo com o período de inverno, além da ausência de alimentação natural.</p> <div class="credits"> <p class="dwt_author">V. MEDRI</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">105</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000300014"> <span id="translatedtitle">Eficácia do mentol como anestésico para juvenis de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Menthol efficiency as anesthetic for juveniles Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Em três experimentos, testou-se a eficiência do mentol como anestésico para a tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, por meio da avaliação de eventos comportamentais, da verificação da margem de segurança do anestésico e das respostas de estresse. No primeiro experimento, foram testadas seis diferentes concentrações de mentol para avaliar o tempo de indução à anestesia. No segundo, foram realizados dois testes com o objetivo de verificar a margem de segurança do anestésico. No terceiro, avaliou-se o efeito estressante do anestésico. A concentração 250mg L-1 de mentol foi a mais adequada para indução de anestesia cirúrgica. Para anestesia voltada para biometria e breve inspeção visual do animal, a concentração mais adequada foi 150-200mg L-1. O dobro da concentração ideal (500mg L-1 não acarretou a morte nos indivíduos, indicando boa margem de segurança para o uso desse anestésico. O mentol, mesmo em sua concentração adequada, induziu ao aumento na glicose sanguínea, caracterizando estresse no peixe. Conclui-se que o mentol não é um anestésico eficaz para juvenis de tilápia durante procedimentos de rotina na piscicultura.This work tested the effectiveness of menthol as anesthetic for Nile tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> by the evaluation of behavioral events, the safety margin of the anesthetic, and stress response. On first experiment, six different anesthetic concentrations were tested to evaluate the induction time to anesthesia. On second experiment, two tests were carried out to verify the safety margin of the anesthetic. On third experiment, stress responses were evaluated. The safe concentration to induce a surgical anesthesia was 250mg L-1. To a brief handling and visual inspection, the appropriated concentration was 150-200mg L-1. There was no mortality after exposure to 500mg L-1, indicating a good safety margin for this anesthetic. Menthol even in its adequate dosage induced a rise in glucose concentrations indicating a stress response of the <span class="hlt">fish</span>. Thus menthol is an ineffective anesthetic to juveniles tilapia during routine procedures in <span class="hlt">fish</span> culture.</p> <div class="credits"> <p class="dwt_author">L.N. Simões</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">106</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000300014&lang=en"> <span id="translatedtitle">Eficácia do mentol como anestésico para juvenis de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Menthol efficiency as anesthetic for juveniles Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Em três experimentos, testou-se a eficiência do mentol como anestésico para a tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), por meio da avaliação de eventos comportamentais, da verificação da margem de segurança do anestésico e das respostas de estresse. No primeiro experimento, foram testadas seis difer [...] entes concentrações de mentol para avaliar o tempo de indução à anestesia. No segundo, foram realizados dois testes com o objetivo de verificar a margem de segurança do anestésico. No terceiro, avaliou-se o efeito estressante do anestésico. A concentração 250mg L-1 de mentol foi a mais adequada para indução de anestesia cirúrgica. Para anestesia voltada para biometria e breve inspeção visual do animal, a concentração mais adequada foi 150-200mg L-1. O dobro da concentração ideal (500mg L-1) não acarretou a morte nos indivíduos, indicando boa margem de segurança para o uso desse anestésico. O mentol, mesmo em sua concentração adequada, induziu ao aumento na glicose sanguínea, caracterizando estresse no peixe. Conclui-se que o mentol não é um anestésico eficaz para juvenis de tilápia durante procedimentos de rotina na piscicultura. Abstract in english This work tested the effectiveness of menthol as anesthetic for Nile tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) by the evaluation of behavioral events, the safety margin of the anesthetic, and stress response. On first experiment, six different anesthetic concentrations were tested to evaluate the induction ti [...] me to anesthesia. On second experiment, two tests were carried out to verify the safety margin of the anesthetic. On third experiment, stress responses were evaluated. The safe concentration to induce a surgical anesthesia was 250mg L-1. To a brief handling and visual inspection, the appropriated concentration was 150-200mg L-1. There was no mortality after exposure to 500mg L-1, indicating a good safety margin for this anesthetic. Menthol even in its adequate dosage induced a rise in glucose concentrations indicating a stress response of the <span class="hlt">fish</span>. Thus menthol is an ineffective anesthetic to juveniles tilapia during routine procedures in <span class="hlt">fish</span> culture.</p> <div class="credits"> <p class="dwt_author">L.N., Simões; L.C., Gomes.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">107</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______932::f76ed653479f7297b5f60e818c54f9e2"> <span id="translatedtitle">Preliminary results on morphometric differentiation between natural populations of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes, Cichlidae)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Dix-sept populations appartenant à six sous-espèces du tilapia du Nil, #<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>$, ont été morphométriquement étudiées (vingt-cinq mesures et huit comptages méristiques). Bien que les résultats obtenus soient encore préliminaires, puisque toutes les sous-espèces connues n'ont pas été examinées et que, pour certaines sous-espèces, très peu de spécimens ont pu être analysés, ils indiquent que la classification sous-spécifique de #O. <span class="hlt">niloticus</span>$ établie par Trewa...</p> <div class="credits"> <p class="dwt_author">Teugels, G. G.; Vreven, E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1998-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">108</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ccsenet.org/journal/index.php/jas/article/view/8408"> <span id="translatedtitle">Control of Reproduction in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus 1758 Using Hibiscus Rosa-sinensis (Linn. Leaf Meal as Reproduction Inhibitor</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Hibiscus rosa-sinensis leaf (HLM was added to a basal diet (350g crude protein and 18.5MJ gross energy/kgdiet at 0, 1.0, 2.0, 3.0 or 4.0 g/kg diets and fed to mixed-sex <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> for 60 days to evaluate theeffects on growth, feed conversion ratio, reproduction traits, and histology of gonads. There were no variations(p >0.05 in growth parameters and feed conversion ratio. Indices of reproduction traits decreased withincreasing dietary HLM levels. <span class="hlt">Fish</span> fed with the basal diet had higher and better indices of reproduction traits(Ptissues, and no lesions were observed. <span class="hlt">Fish</span> fed 1.0g HLM/kg diet showed slight increase in interstitial cells intestes. <span class="hlt">Fish</span> fed 2.0g HLM/kg diet showed swollen spermatids nuclei, increased interstitial cells and focalnecrosis in testes; and hydropic degeneration, ruptured follicles, granulomatous inflammation in the insterstitiumand necrosis in ovaries. <span class="hlt">Fish</span> fed 3.0g HLM/kg diet exhibited atrophy of seminiferous tubules in testes. <span class="hlt">Fish</span> fed4.0g HLM/kg diet, there was disintegration of spermatids and necrosis in testes and severe atretic follicles inovaries. Reproduction traits and histological observations of gonads in O. <span class="hlt">niloticus</span> fed high dietary HLM levelsrevealed that Hibiscus rosa-sinensis leaves may be effective as a reproduction inhibitor in O. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Temitope JEGEDE</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">109</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::f2a837608d886ef3dc7e161e086b22a2"> <span id="translatedtitle">EVALUATION OF FERMENTED MANGO (Mangifera indica) SEED MEAL IN THE PRACTICAL DIET OF NILE TILAPIA, (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) FINGERLINGS</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">This study evaluated the use of fermented mango (Mangifera indica) seed meal (FMS) to substitute yellow maize in the practical diet for Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings (4.76±0.32 g). Five iso-nitrogeneous (35% crude protein) and approximately iso-energetic (3400 ME Kcal/kg) dietsin which yellow maize was replaced by FMSat 0% (FMS0/Control diet), 25% (FMS25), 50% (FMS50), 75% (FMS75) and 100% (FMS100) levels were formulated. The <span class="hlt">fish</span> were fed on the diets at 5% body weight for...</p> <div class="credits"> <p class="dwt_author">Samuel Olubodun Obasa; Segun Peter Alatise; Isaac Tunde Omoniyi; Wilfred Olusegun Alegbeleye; Francisca Adebukola George</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">110</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::bcc8defd28744a3798afb25582f95628"> <span id="translatedtitle">Characterization and evaluation of the impact of feed management on the effluents of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) culture</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The objective of this study was to evaluate the effect of different feed management on the quality of effluent water generated in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) culture ponds. Feed was supplied as follows: natural food, and pelleted, extruded or minced ration. The study was conducted during 19 weeks in 12 continuous water exchange ponds of 300 m² each, with a population of male Nile tilapia juveniles, in a density equal to 1.7 <span class="hlt">fish</span> m-2. Feeds contained 30% crude protein, 3,000 kcal dig...</p> <div class="credits"> <p class="dwt_author">Ana Eliza Baccarin; Antonio Fernando Monteiro Camargo</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">111</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.sjst.psu.ac.th/journal/26-2.pdf/04-fishmeal.pdf"> <span id="translatedtitle">Replacing palm kernel cake for fishmeal in sex-reversed red tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linn. feed</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Five isonitrogeneous and isocaloric feeds containing various levels of palm kernel cake (0, 10, 20, 30 and 40% as a replacement for fishmeal were fed to four replicate groups of sex-reversed red tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linn. fingerlings, mean initial weight 3.02-3.03 g, in 235-l aquaria fitted with a closed recirculation system for 10 weeks. The results showed declines in growth, feed utilization and digestibility coefficient with increases in the levels of supplemented palm kernel cake. The maximum growth was achieved in the <span class="hlt">fish</span> given the feed with 10% palm kernel cake and was different from that when the basal feed (formula 1 was used. Satisfactory results of feed utilization, (feed conversion ratio, protein efficiency ratio, apparent net protein utilization and digestibility coefficient were noted in the <span class="hlt">fish</span> groups given the feed with a maximum of 20% palm kernel cake in their feeds. The supplementation of palm kernel cake at any levels in the feeds had no effects on <span class="hlt">fish’s</span> blood parameters or hepatosomatic index. It was concluded that the maximum of 20% palm kernel cake could be supplemented in the feed for sex-reversed red tilapia while maintaining satisfactory growth, feed utilization, digestibility coefficient and normal <span class="hlt">fish</span> physiology. Besides, the feed cost was kept minimum compared to the supplementation of other levels of palm kernel cake in their feeds.</p> <div class="credits"> <p class="dwt_author">Nakachart, D.</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">112</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000300012&lang=en"> <span id="translatedtitle">The use of lactic acid bacteria isolated from intestinal tract of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), as growth promoters in <span class="hlt">fish</span> fed low protein diets / Uso de bacterias ácido lácticas aisladas del tracto intestinal de tilapia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) como promotores de crecimiento en peces alimentados con dietas bajas en proteína</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Chile | Language: English Abstract in spanish Se evaluó el efecto como promotores de crecimiento de cinco cepas de bacterias ácido lácticas (Enterococcus faecium, E. durans, Leuconostoc sp., Streptococcus sp. I y Streptococcus sp. II) aisladas del tracto intestinal de tilapia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Se formularon ocho dietas isocalóri [...] cas: una conteniendo 40% de proteína como control positivo y siete con 27% de proteína. Cinco dietas con 27% de proteína fueron suplementadas con cada una de las bacterias aislada a una concentración de 2,5x10(6) ufc g-1 de alimento. Un probiótico comercial a base de S. faecium y Lactobacillus acidophilus a la misma concentración de inclusión bacteriana a una dieta con 27% de proteína como dieta comparativa, y la última dieta no fue suplementada con bacterias (control negativo). Juveniles de tilapia (280 mg de peso basal) fueron distribuidos en acuarios de 15 L de capacidad, a una densidad de dos juveniles por litro, alimentados durante 12 semanas con las dietas experimentales. Los resultados mostraron que los organismos alimentados con las dietas suplementadas con bacterias nativas presentaron crecimiento y asimilación del alimento significativamente mayor que las dietas control. El tratamiento con Streptococcus sp. I, aislada del intestino de la tilapia, produjo el mejor crecimiento y la mejor eficiencia alimenticia, sugiriendo que esta bacteria es apropiada como un promotor de crecimiento nativo de tilapia. Abstract in english In this study, the effect as growth promoter of five lactic acid strains (Enterococcus faecium, E. durans, Leuconostoc sp., Streptococcus sp. I and Streptococcus sp. II), isolated from intestinal tract of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), was evaluated. Eight isocaloric diets were formulated: on [...] e containing 40% of protein as positive control, and seven with 27% protein. Five diets with 27% protein were supplemented with one of the isolated lactic acid bacteria in a concentration of 2.5x10(6) cfu g-1 of diet. A commercial probiotic based on S. faecium and Lactobacillus acidophilus was added at the same concentration to one 27% protein diet as a comparative diet, and the last diet was not supplemented with bacteria (negative control). Tilapia fry (280 mg basal weight) stocked in 15 L aquaria at a density of two per liter were fed for 12 weeks with experimental diets. Results showed that fry fed with native bacteria supplemented diets presented significantly higher growth and feeding performance than those fed with control diet. Treatment with Streptococcus sp. I isolated from the intestine of Tilapia produced the best growth and feeding efficiency, suggesting that this bacteria is an appropriate native growth promoter.</p> <div class="credits"> <p class="dwt_author">Lara-Flores, Maurilio; Olvera-Novoa, Miguel A.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">113</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24497177"> <span id="translatedtitle">Piperonyl butoxide increases oxidative toxicity of fenthion in the brain of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The present study was designed to understand the effects of piperonyl butoxide (PBO), modulator of cytochrome P450 (CYP 450), on the neurotoxicity of organophosphate pesticide fenthion in the brain of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> used as a model organism. <span class="hlt">Fish</span> were exposed to one-fourth of the LC?? value of fenthion (0.567 mg/L) and 0.5 mg/L PBO concentration for 24 h, 96 h, and 15 days. Glutathione (GSH)-related antioxidant system, lipid peroxidation, stress proteins, and acetylcholinesterase (AchE) activity were investigated. Our results showed that PBO induced the neurotoxic effect of fenthion with increasing oxidative stress in long-term exposure. GSH-related antioxidant system might take a role in protecting the brain from these oxidative effects. PBO possibly inhibited the biotransformation of fenthion by inhibiting CYP 450; thereby preventing the brain from AChE inhibition in short-term exposure. Changes in parameters indicated that PBO caused biphasic response by affecting CYP 450 in the brain of O. <span class="hlt">niloticus</span>. PMID:24497177</p> <div class="credits"> <p class="dwt_author">Üner, Nevin; Piner, Petek; Temiz, Özge</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">114</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2013AIPC.1571..687D"> <span id="translatedtitle">Antioxidant activities of red tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) protein hydrolysates as influenced by thermolysin and alcalase</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The hydrolysis process was performed on <span class="hlt">fish</span> meat from Red Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) by enzymes thermolysin and alcalase under optimum conditions. The hydrolysis was performed from 0 - 4 hours at 37°C. Hydrolysates after 2 hours incubation with thermolysin and alcalase had degree of hydrolysis of 76.29 % and 63.49 %, respectively. The freeze dried protein hydrolysate was tested for peptide content and characterized with respect to amino acid composition. The result of increased peptide content in Red Tilapia (O. <span class="hlt">Niloticus</span>) hydrolysates obtained was directly proportional to the increase activities of different proteolytic enzymes. The result of amino acid composition showed that the sample used contained abundant Gly, Ala, Asp, Glu, Lys and Leu in residues or peptide sequences. Both enzymatic hydrolysates were tested for anti-oxidant activity with DPPH and ABTS assay. Alcalase yielded higher anti-oxidative activity than Thermolysin hydrolysates after 1 hour incubation, but both enzymes hydrolysates showed a significant decrease of anti-oxidant activity after 2 hours of incubation. Hydrolysates from Red Tilapia may contribute as a health promoting ingredient in functional foods to reduce oxidation stress caused by accumulated free radicals.</p> <div class="credits"> <p class="dwt_author">Daud, Nur'Aliah; Babji, Abdul Salam; Yusop, Salma Mohamad</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">115</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982003000200002&lang=en"> <span id="translatedtitle">Fibra bruta para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L) / Crude fiber for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L) fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Este experimento objetivou avaliar diferentes níveis de fibra bruta no desempenho e no tempo de retenção do bolo alimentar em alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L). Foram utilizados 125 alevinos (1,39 ± 0,03 g) distribuídos em 25 aquários de 54 L, em um delineamento inteiramente cas [...] ualizado, com cinco tratamentos e cinco repetições. Foram formuladas cinco rações isoenergéticas (3000 kcal/kg de energia digestível) e isoprotéicas (30% de proteína bruta), diferindo quanto aos níveis de fibra bruta (3,65; 4,75; 6,00; 7,25 e 8,50%). O período experimental foi de 64 dias a uma temperatura média de 26,5ºC ± 0,8 de manhã e 27,5ºC ± 0,7 à tarde. Não foram observadas diferenças quanto ao desempenho dos alevinos, entretanto houve decréscimo linear para o tempo de retenção do bolo alimentar com o aumento da fibra. Abstract in english This work aimed to evaluate different crude fiber levels on reverted Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L) fingerlings performance and time of retention of food. One hundred and twenty-five fingerlings of Thai strain, 1.39 ± 0.03 g of initial weight were allotted to twenty-five 54 L aquarium, at f [...] ive treatments and five replications on completely randomized design. Five isoenergy (3000 kcal/kg of digestible energy) and isoprotein (30% of crude protein) diets were formulated with five different crude fiber levels (3.65, 4.75, 6.00, 7.25 and 8.50%), for ranging cellulose and inert material addition. The experimental period was 64 days with 26.5ºC ± 0.8 in the morning and 27.5ºC ± 0.7 in the afternoon temperatures. No difference was observed to fingerlings performance (food conversion, final weight, weight gain), but a linear decrease to time of retention of food with crude fiber addition.</p> <div class="credits"> <p class="dwt_author">Fábio, Meurer; Carmino, Hayashi; Wilson Rogério, Boscolo.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">116</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000900001"> <span id="translatedtitle">Níveis de vitamina C e ferro para tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Levels of vitamin C and iron for nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Os efeitos de diferentes níveis de vitamina C e ferro no desempenho produtivo e parâmetros fisiológicos da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> foram avaliados por um período de 73 dias. O delineamento foi inteiramente casualizado, com tratamentos dispostos em esquema fatorial com três níveis de vitamina C (125; 375 e 1115 mg/kg e três níveis de ferro (30, 90 e 270 mg/kg, mais um tratamento adicional (0 mg/kg de suplementação de vitamina C e ferro, com quatro repetições cada tratamento, totalizando 10 grupos experimentais. Utilizaram-se 240 alevinos revertidos com peso médio inicial de 7,46 ± 0,49 g, distribuídos aleatoriamente em 40 aquários de 250 L, numa lotação de 6 peixes/aquário. Confeccionou-se dieta purificada com 32,0% de proteína bruta e 3300 kcal/kg de energia digestível. A ausência de vitamina C e ferro nas dietas propiciou o aparecimento de anemia microcítica e hipocrômica aos alevinos. A presença dessa vitamina em dosagens elevadas estimulou a liberação de eritrócitos imaturos na corrente sangüínea. Determinou-se, também, que níveis desses acima das exigências nutricionais descritas para a espécie não determinaram efeito detrimental no desempenho produtivo, na produção de proteínas plasmáticas ou nos aspectos morfológicos do fígado.The effects of different levels of vitamin C and iron on growth performance and physiological parameters on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were evaluated for 73 days. A factorial experiment with three levels of vitamin C (125; 375 e 1115 mg/kg and three levels of iron (30, 90 e 270 mg/kg, plus an additional treatment (with 0 mg/kg of vitamin C and iron, was considered on a completely randomized design, with four replicates for each experimental group. It was randomly stocked 240 reverted fingerlings, an average weight of 7.46 ± 0.49 g, into 40, 250L, aquaria at a density of 6 <span class="hlt">fish</span>/aquarium. A albumin-gelatin-diet was formulated to contain 32.0% of crude protein and 3,300 kcal/kg of digestible energy. Fingerlings of Nile tilapia fed diet without supplemental vitamin C and iron developed hypochromic microcytic anemia and the supplemental vitamin C determined the presence of immature erythrocytes on blood. It was also determined that iron serum concentration was influenced by vitamin C and iron supplied on diets, and that levels above to nutritional requirements for the specie did not determined detrimental effect on growth performance, plasmatic protein or morphologic characteristics of liver.</p> <div class="credits"> <p class="dwt_author">Margarida Maria Barros</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">117</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000900001&lang=en"> <span id="translatedtitle">Níveis de vitamina C e ferro para tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Levels of vitamin C and iron for nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Os efeitos de diferentes níveis de vitamina C e ferro no desempenho produtivo e parâmetros fisiológicos da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) foram avaliados por um período de 73 dias. O delineamento foi inteiramente casualizado, com tratamentos dispostos em esquema fatorial com três níveis de [...] vitamina C (125; 375 e 1115 mg/kg) e três níveis de ferro (30, 90 e 270 mg/kg), mais um tratamento adicional (0 mg/kg de suplementação de vitamina C e ferro), com quatro repetições cada tratamento, totalizando 10 grupos experimentais. Utilizaram-se 240 alevinos revertidos com peso médio inicial de 7,46 ± 0,49 g, distribuídos aleatoriamente em 40 aquários de 250 L, numa lotação de 6 peixes/aquário. Confeccionou-se dieta purificada com 32,0% de proteína bruta e 3300 kcal/kg de energia digestível. A ausência de vitamina C e ferro nas dietas propiciou o aparecimento de anemia microcítica e hipocrômica aos alevinos. A presença dessa vitamina em dosagens elevadas estimulou a liberação de eritrócitos imaturos na corrente sangüínea. Determinou-se, também, que níveis desses acima das exigências nutricionais descritas para a espécie não determinaram efeito detrimental no desempenho produtivo, na produção de proteínas plasmáticas ou nos aspectos morfológicos do fígado. Abstract in english The effects of different levels of vitamin C and iron on growth performance and physiological parameters on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were evaluated for 73 days. A factorial experiment with three levels of vitamin C (125; 375 e 1115 mg/kg) and three levels of iron (30, 90 e 270 mg/kg), pl [...] us an additional treatment (with 0 mg/kg of vitamin C and iron), was considered on a completely randomized design, with four replicates for each experimental group. It was randomly stocked 240 reverted fingerlings, an average weight of 7.46 ± 0.49 g, into 40, 250L, aquaria at a density of 6 <span class="hlt">fish</span>/aquarium. A albumin-gelatin-diet was formulated to contain 32.0% of crude protein and 3,300 kcal/kg of digestible energy. Fingerlings of Nile tilapia fed diet without supplemental vitamin C and iron developed hypochromic microcytic anemia and the supplemental vitamin C determined the presence of immature erythrocytes on blood. It was also determined that iron serum concentration was influenced by vitamin C and iron supplied on diets, and that levels above to nutritional requirements for the specie did not determined detrimental effect on growth performance, plasmatic protein or morphologic characteristics of liver.</p> <div class="credits"> <p class="dwt_author">Margarida Maria, Barros; Luiz Edivaldo, Pezzato; Geisa Karine, Kleemann; Hamilton, Hisano; Guilherme Jordão de Magalhães, Rosa.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">118</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/11504339"> <span id="translatedtitle">Environmental cadium exposure and metabolic responses of the Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The contamination of water by metal compounds is a worldwide environmental problem. This study was undertaken to evaluate the impact of short-term cadmium exposure on metabolic patterns of the freshwater <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. The <span class="hlt">fish</span> were exposed to 320, 640, 1,280 and 2,560 microg/l sublethal concentrations of Cd++ (CdCl2) in water for 7 days. The specific activities of the enzymes phosphofructo kinase (PFK-E.C.2.7.1.11.), lactate dehydrogenase (LDH-E.C.1.1.1.27.) and creatine kinase (CKE.C.2.7.3.2.) were decreased in white muscle after cadmium treatments, indicating decreases in the capacity of glycolysis in this tissue. Cadmium exposure induced increased glucose concentration in white muscle of <span class="hlt">fish</span>. On the other hand, cadmium exposure at sublethal concentrations increased phosphofructo kinase and LDH in red muscle of <span class="hlt">fish</span>. Cadmium significantly decreased total protein concentrations in liver and white muscle regardless of tissue glycogen levels. The data suggest that cadmium acts as a stressor, leading to metabolic alterations similar to those observed in starvation. PMID:11504339</p> <div class="credits"> <p class="dwt_author">Almeida, J A; Novelli, E L; Dal Pai Silva, M; Júnior, R A</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">119</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.mdpi.com/2076-2615/2/1/16/"> <span id="translatedtitle">Effects of Dietary Yeast (Saccharomyces cerevisia Supplementation in Practical Diets of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A 51-day feeding trial was carried out to determine the effects of various dietary levels of brewer’s yeast, Saccharomyces cerevisiae, in the growth performance, body composition and nutrient utilization in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, juveniles. <span class="hlt">Fish</span> (7.6 ± 0.3 g were stocked into eighteen 1,000-L tanks (100 <span class="hlt">fish</span> per tank; n = 3 and fed to apparent satiation six isonitrogenous (27% crude protein and isoenergetic (19 kJ/g diets, formulated to contain different dried yeast levels (0%, 10%, 15%, 20%, 30% or 40% diet in substitution to fishmeal. Body weight tripled at the end of the feeding trial for <span class="hlt">fish</span> fed up to 20% dietary yeast incorporation. Daily growth coefficient (DGC, % body weight/day decreased with increasing dietary yeast level (P < 0.0001. Voluntary feed intake (VFI, %BW/day did not vary significantly with increasing yeast level. <span class="hlt">Fish</span> fed 40% yeast showed significant reduction in protein efficiency rate, protein retention and nitrogen gain. Increasing levels of dietary yeast did not significantly affect protein or lipid digestibility. Dietary dried yeast was seemingly palatable to tilapia juveniles and was suitable up to 15% inclusion to promote growth and efficient diet utilization, without affecting body composition.</p> <div class="credits"> <p class="dwt_author">José E. P. Cyrino</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">120</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22331699"> <span id="translatedtitle">Acute exposure to pure cylindrospermopsin results in oxidative stress and pathological alterations in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Cylindrospermopsin (CYN) is increasingly recognized as a potential threat to drinking water safety, due to its ubiquity. This cyanotoxin has been found to cause toxic effects in mammals, and although <span class="hlt">fish</span> could be in contact with this toxin, acute toxicity studies on <span class="hlt">fish</span> are nonexistent. This is the first study showing that single doses of CYN pure standard (200 or 400 ?g CYN/kg <span class="hlt">fish</span> bw) by oral route (gavage) generate histopathological effects in <span class="hlt">fish</span> (Tilapia-<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) exposed to the toxin under laboratory condition. Among the morphological changes, disorganized parenchymal architecture in the liver, dilated Bowman's space in the kidney, fibrolysis in the heart, necrotic enteritis in the intestines, and hemorrhages in the gills, were observed. Moreover, some oxidative stress biomarkers in the liver and kidney of tilapias were altered. Thus, CYN exposure induced increased protein oxidation products in both organs, NADPH oxidase activity was significantly increased with the kidney being the most affected organ, and decreased GSH contents were also detected in both organs, at the higher dose assayed. PMID:22331699</p> <div class="credits"> <p class="dwt_author">Puerto, María; Jos, Angeles; Pichardo, Silvia; Moyano, Rosario; Blanco, Alfonso; Cameán, Ana M</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-04-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_5");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a style="font-weight: bold;">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_7");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">121</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2004NW.....91...90G"> <span id="translatedtitle">Individual protein balance strongly influences ?15N and ?13C values in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Although stable isotope ratios in animals have often been used as indicators of the trophic level and for the back-calculation of diets, few experiments have been done under standardized laboratory conditions to investigate factors influencing ?15N and ?13C values. An experiment using Nile tilapia [<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.)] was therefore carried out to test the effect of different dietary protein contents (35.4, 42.3, and 50.9%) on ?15N and ?13C values of the whole tilapia. The <span class="hlt">fish</span> were fed the isoenergetic and isolipidic semi-synthetic diets at a relatively low level. ?15N and ?13C values of the lipid-free body did not differ between the <span class="hlt">fish</span> fed the diets with different protein contents, but the trophic shift for N and C isotopes decreased with increasing protein accretion in the individual <span class="hlt">fish</span>, for N from 6.5‰ to 4‰ and for C in the lipid-free body from 4‰ to 2.5‰. This is the first study showing the strong influence of the individual protein balance to the degree to which the isotopic signature of dietary protein was modified in tissue protein of <span class="hlt">fish</span>. The extrapolation of the trophic level or the reconstruction of the diet of an animal from stable isotope ratios without knowledge of the individual physiological condition and the feeding rate may lead to erroneous results.</p> <div class="credits"> <p class="dwt_author">Gaye-Siessegger, Julia; Focken, Ulfert; Abel, Hansjörg; Becker, Klaus</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">122</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od______1664::baa9a60094a87f7a4822a3216108480d"> <span id="translatedtitle">Comparative Growth Performance and Feed Utilization of Four Local Strains of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) Collected From Different Locations in Egypt</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Brood stocks of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) were collected from Lakes ofNasser (Aswan), Manzalah, Maryut and Abbassa fishponds. Fingerlings ofFI of each strain was fed diet containing 27% CP for 90 days. The obtained results showed that Aswan strain was superior to other tilapia strains in growth performance. Survival rate was not significantly different among Nile tilapia strains. Crude protein contents in <span class="hlt">fish</span> body was insignificantly different among Abbassa, Aswan and Manzalah ...</p> <div class="credits"> <p class="dwt_author">Abdel Tawwab, Mohsen</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">123</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::91fe61e792f4a71874682cd03a208d41"> <span id="translatedtitle">Distribution of Heavy Metals in Bones, Gills, Livers and Muscles of (Tilapia)<i> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> </i>from Henshaw Town Beach Market in Calabar Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Two sets of samples of commercially important <span class="hlt">fish</span> species <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> of size 29 cm and 20 cm respectively were purchased from the Henshaw town beach market in Calabar, Calabar South Local Government Area of Cross River State, Nigeria in October 2007. The concentrations of five heavy metals (Pb, Zn, Cd, As and Hg) in their bones, gills, livers and muscles were determined using flame atomic absorption spectrophotometer. The result showed the heavy metal concentrations in the ...</p> <div class="credits"> <p class="dwt_author">Edem Christopher A; Osabor Vincent; Iniama Grace; Etiuma Rebecca; Eke Joseph</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">124</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::b30825ca775df21aefa19639f56c27a2"> <span id="translatedtitle">Extruded Leftover Food as Animal Feed: I. Effect of Extruded Feed on Growth and Feed Utilization of Tilapia (<i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></i>) in Saudi Arabia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">A Laboratory experiment was used to evaluate the effect of extruded leftover food as an alternate source of <span class="hlt">fish</span> diet to Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, 76.75±1.27 g). Three experimental diets were used. Two extruded leftover food types [with minerals and vitamins (type-1) and without (type-2) were used to prepare two experimental treatments in duplicate as compared to a commercial tilapia diet (ARASCO) as a control. The final body weight and Specific Growth Rate (SGR) were not a...</p> <div class="credits"> <p class="dwt_author">Al-ruqaie, Ibrahim M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">125</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2011/1117-1123.pdf"> <span id="translatedtitle">Assessment Study on the use of Pawpaw; Carica papaya Seeds to Control <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Breeding</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available This study was carried out to assess the ability of using pawpaw (Carica papaya seeds as a natural reproduction inhibitor for tilapia <span class="hlt">fish</span> (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> culture to control its breeding. Biochemical, physiological and histopathological effects of pawpaw seeds on male tilapia <span class="hlt">fish</span> were also determined. Mature male tilapia were stocked for 4 weeks and treated with low dose (3 g/kg/day and high dose (6 g/kg/day of ground dried pawpaw seeds mixed with their feed. The obtained results showed that the pawpaw seeds induced permanent sterility in the high dose treated <span class="hlt">fish</span> while the low dose treatment showed reversible results. The results also demonstrated that <span class="hlt">fish</span> treated with high dose of pawpaw exhibited higher biochemical and physiological effects as: low meat quality, a progressive fall in erythrocyte (RBCs count, hemoglobin (Hb content and haematocrit values. Also the high dose revealed a significant increase in the leukocytes (WBCs count, serum glucose, total protein, aspartate aminotransferase (AST, alanine aminotransferase (ALT, creatinine and uric acid levels. Moreover, serum total lipids revealed a significant decrease compared to control group. On the other hand, the low dose treatment revealed lower biochemical and physiological changes. Histological sections of testis showed disintegration of sperm cells and focal necrosis of seminefrous tubules in the high dose treated <span class="hlt">fish</span>, hepato-pancreas and posterior kidney tissues also showed severe changes in high dose treated <span class="hlt">fish</span>. Milder degenerative changes in some necrotic foci and slight changes in hepato-pancreas and posterior kidney were observed in the low dose treated <span class="hlt">fish</span>. The study concluded that pawpaw seeds which are cheap and easy to obtain, can be incorporated into <span class="hlt">fish</span> feeds with adjusted amount and be used to control breeding of tilapia <span class="hlt">fish</span> in growing ponds instead of unfavorable and expensive hormonal use.</p> <div class="credits"> <p class="dwt_author">Wafaa T. Abbas</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">126</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:42008651"> <span id="translatedtitle">Bioaccumulation of some heavy metals in adult tilapia <span class="hlt">oreochromis</span> <span class="hlt">niloticus</span> in Southern part of Laguna de Bay</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, one of the most important <span class="hlt">fish</span> species in Philippine aquaculture, is grown abundantly in Laguna de Bay. A preliminary study was conducted to determine the levels of accumulated mercury (Hg), cadmium (Cd) and lead (Pb) in the muscle tissue of this fresh water <span class="hlt">fish</span> collected from February (wet season) to March (dry season) 2008 in the southern part of Laguna de Bay. Heavy metal analyses using atomic absorption spectrophotometer (AAS) showed a higher concentration of Hg and Cd during the wet season than in the dry season. However, analysis of variance revealed significant seasonal variation on only in Cd (P=0.0253). Lead, on the other hand, was not detected in the <span class="hlt">fish</span> samples. The mean concentration set by FAO but the mean level of Cd (0.161 ppm) was almost equal to the limit given for <span class="hlt">fish</span>. This could represent a significant health risk to the consuming public. (author)</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2010-07-14</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">127</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000200018"> <span id="translatedtitle">Edad y crecimiento del híbrido de tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> x <span class="hlt">Oreochromis</span> aureus (Perciformes: Cichlidae en la represa “Zimapán” Hidalgo, México</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available La edad y crecimiento de la tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> x <span class="hlt">Oreochromis</span> aureus fueron determinados por medio de la lectura de escamas. Un total de 382 individuos fueron capturados mediante el uso de redes agalleras y atarrayas. Ocho recolectas mensuales se llevaron a cabo entre septiembre 2003-mayo 2004; se registraron los datos de longitud estándar en cm. (Le, el peso total en g (Pt y se obtuvieron muestras de escamas para registrar el largo de la escama en mm. (Lesc y el número de anillos de crecimiento formados. Las tallas y pesos de recolecta variaron entre 38 a 232mm (Le y de 8.7 a 311.9g de peso total (Pt respectivamente. El recuento de los anillos anuales en escamas, permitió establecer cuatro grupos de edad, siendo el grupo de edad 2 el más representativo, con un 34.3% de la población muestreada. El cálculo de los incrementos marginales del crecimiento mensual de las escamas, sugirió la formación de dos anillos, uno de ellos se forma en los meses de noviembre-enero y otro en los meses de abril-mayo, los cuales coinciden con la época de bajas temperaturas y de madurez gonádica respectivamente. Los parámetros de crecimiento quedaron establecidos en: L?=281.1mm, W?=877.1g, K=0.33 y T0=0.88/año. Las curvas de crecimiento en longitud y peso se describieron mediante las ecuaciones de von Bertalanffy: Le=28.11 [1- e-0.33(t+0.88] y Pt=877.17 [1-e-0.33(t+0.88]³. Finalmente, se concluyó que los peces que se explotan en la represa mediante captura comercial presentan entre un año y año y medio de edad.Age and growth of the hybrid tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> x <span class="hlt">Oreochromis</span> aureus (Perciformes: Cichlidae in the dam “Zimapan” Mexico. Studies on age and growth in <span class="hlt">fishes</span> are essential to establish models on population dynamics. The previos issues were determined in this study by scale growth analyses. Between September 2003 and May 2004, 382 organisms were captured using gill and atarraya nets. Eight samples were developed every month a long this study. Standard length in centimeters (Le, total weight in grams (Pt, scale length in centimeters (Lesc and growth rings were determined. The size and weight ranged from 38 to 232mm (Le and 8.7 to 311.9g (Pt, respectively. The growth rings analyses reveal four age groups, being the sec-ond group the most representative with 34.3% of the total sampled. The scale ring analyses showed two growth rings, one develops between November-January and the other between April-May, in good correlation with low temperature and gonad development, respectively. The growth parameters were established as: L?=281.1mm, W?=877.1g, K=0.33 and T0=0.88year -1. The growth curves based on length and weight were described by using the von Bertalanffy model: Le =28.11[1-e-0.33(t+0.88] and Pt =877.17[1-e-0.33(t+0.88]³. Finally, it is concluded that commercial catches in this dam are between a year and year and half-old when exploited. Rev. Biol. Trop. 59 (2: 761-770. Epub 2011 June 01.</p> <div class="credits"> <p class="dwt_author">M. A. Gómez-Ponce</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">128</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/jbs/2012/287-293.pdf"> <span id="translatedtitle">Health Condition of a Farmed Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Earthen Ponds, Northern Bangladesh</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Investigation on health conditions of a farmed tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in two upazilas of Mymensingh District were carried out through clinical and histopathological observation during September, 2010 to March, 2011. <span class="hlt">Fish</span> sample and water quality parameters (temperature, dissolved oxygen, pH, alkalinity, nitrite and ammonia were monitored on a monthly basis. Clinical observations of the <span class="hlt">fish</span> were also done for any kind of abnormalities at monthly intervals. Samples of skin, muscle, liver and kidney were observed by histological techniques. Among the water quality factors, water temperature and alkalinity were found at unfavourable level for <span class="hlt">fish</span> during the colder months. Clinically, it was observed that the tilapia were more affected from December and January and almost normal in appearance during September, October, November and March. Different clinical symptoms like rough skin, scale loss, red spots and dermal lesions were noticed in December and January. Histopathologically, sampled <span class="hlt">fish</span> were found almost normal in the months of September and October. In the month of November minor pathologies were found to be started. Marked pathological changes like necrosis, pyknosis, hemorrhage, hypertrophy, hyperplasia, missing of primary and secondary gill lamellae, vacuums, fat droplets and fungal granuloma and fungal hyphae were observed in <span class="hlt">fish</span> organs during December and January. Whereas, the pathological condition of <span class="hlt">fish</span> gradually reduced in February. Again when considered individual <span class="hlt">fish</span> pond, <span class="hlt">fishes</span> of pond 1 (P1 in Bhaluka upazila were more affected than other ponds. The study showed that severity of clinical and pathological changes were increased in December and January. During the period of Epizootic Ulcerative Syndrome (EUS, bacterial and protozoan diseases were evident.</p> <div class="credits"> <p class="dwt_author">M. Shamsuddin</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">129</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::1750b17fe839a5f26a9ddf8e05ccf173"> <span id="translatedtitle">Hematological characterization of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, Linnaeus, 1758) reared intensively in a recirculating aquaculture system in relation to water temperature</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The aim of this study was to obtain a basic knowledge of the hematological response of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> mantained in different tchnological condition induced by different temperatures. Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, Linnaeus, 1758) with average weight of 33,5±1,0 g, they were stocked in 12 rearing units at 20, 24,30 and 280C (control) water temperature for 30 days. Diet of 41 % protein was offered as feed, 3 times daily. The sampling of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> bl...</p> <div class="credits"> <p class="dwt_author">Catalina Ciortan Mirea</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">130</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2012/729-735.pdf"> <span id="translatedtitle">Skeletal Ossification Impairment in Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> after Exposure to Lead Acetate</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Heavy metal pollution represents a serious problem facing many of the aquatic organisms. Lead is one of the most toxic elements found in many industrial effluents which are metabolized inside bodies and can cause skeletal deformities by impairing developmental processes and bone formation. This study was undertaken to determine the LC50 of Pb-acetate and detect the effect of 1/10 LC50 exposure on fingerlings of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Modern and accurate diagnostic methods were used; Scanning Electron Microscopy (SEM of gills, plain X-ray and Energy-dispersive X-ray Spectroscopy (EDX of the spinal column to explain the elemental analysis. The results indicated that the 96 h LC50 of lead acetate was 146.8 mg L-1. SEM showed a distinct degeneration in gill filaments and pavement cells with increasing of mucus secretion after lead exposure. X-ray revealed slight dorsal spinal curvature. EDX analysis of the spinal column of treated <span class="hlt">fish</span> showed decrease in calcium and phosphorus weight percents, on the other hand Pb appeared in treated <span class="hlt">fish</span> but not in control ones. Finally this study can spot a light on the dangerous effects of lead toxicity in developing of <span class="hlt">fish</span> and impairment of their skeletal ossification which may lead to skeletal deformities.</p> <div class="credits"> <p class="dwt_author">Taghreed B. Ibrahim</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">131</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24171258"> <span id="translatedtitle">Skeletal ossification impairment in Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) after exposure to lead acetate.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Heavy metal pollution represents a serious problem facing many of the aquatic organisms. Lead is one of the most toxic elements found in many industrial effluents which are metabolized inside bodies and can cause skeletal deformities by impairing developmental processes and bone formation. This study was undertaken to determine the LC50 of Pb-acetate and detect the effect of 1/10 LC50 exposure on fingerlings of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Modern and accurate diagnostic methods were used; Scanning Electron Microscopy (SEM) of gills, plain X-ray and Energy-dispersive X-ray Spectroscopy (EDX) of the spinal column to explain the elemental analysis. The results indicated that the 96 h LC50 of lead acetate was 146.8 mg L(-1). SEM showed a distinct degeneration in gill filaments and pavement cells with increasing of mucus secretion after lead exposure. X-ray revealed slight dorsal spinal curvature. EDX analysis of the spinal column of treated <span class="hlt">fish</span> showed decrease in calcium and phosphorus weight percents, on the other hand Pb appeared in treated <span class="hlt">fish</span> but not in control ones. Finally this study can spot a light on the dangerous effects of lead toxicity in developing of <span class="hlt">fish</span> and impairment of their skeletal ossification which may lead to skeletal deformities. PMID:24171258</p> <div class="credits"> <p class="dwt_author">Hassanain, Mohey A; Abbas, Wafaa T; Ibrahim, Taghreed B</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">132</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::6d33b6e05bf29f3cab890853e0f7706e"> <span id="translatedtitle">Biochemical and cellularchanges in <i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></i> related to the water pollution of a degraded river - doi: 10.4025/actascibiolsci.v35i3.13207</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The effects of polluted water at three sites in the Marinho River, Brazil, on <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Nile tilápia) were investigated using histological, hematological and biochemical approaches. <span class="hlt">Fish</span> exposed to the impacted water demonstrated that histological changes in gills were accompanied by nuclear and micronuclei abnormalities in cells. The activity of liver and plasma biomarkers (alkaline phosphatase (ALP), acid phosphatase (ACP), alanine aminotran...</p> <div class="credits"> <p class="dwt_author">Zilma Maria Almeida Cruz; Rodrigo Roque Lesqueves de Castro; Adriana Canal; Romildo Rocha Azevedo Júnior; Ary Gomes da Silva; Alessandro Ramos</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">133</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scirp.org/journal/PaperDownload.aspx?DOI=10.4236/jep.2012.36060"> <span id="translatedtitle">Evaluation of Nitrogen and Phosphorus Wastes Produced by Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. Fed Azolla-Diets in Earthen Ponds</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Nitrogen (N and phosphorus (P wastes produced by Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. fed Azolla, an aquatic atmospheric nitrogen fixing fern, was evaluated for 90 days in pond experiment. Six isonitrogenous (29.2% crude protein and isoenergetic (16.9 Kj·g–1 diets A0, A10, A20, A30, A40 and A50, containing 0%, 10%, 20%, 30%, 40% and 50% of Azolla meal (AM respectively, as partial fishmeal (FM substitutes, was provided to experimental <span class="hlt">fish</span>. The Azolla-free diet A0 served as a control. <span class="hlt">Fish</span> specific growth rate (SGR was higher with the control diet, the lower values being obtained in A50-fed <span class="hlt">fish</span> (P Azolla could be used in diet to sustain Nile tilapia growth and as “environmentally-friendly” ingredient to limit P loss, while providing N to the field, beneficially in tropical marshland pond where this nutrient is already limiting.</p> <div class="credits"> <p class="dwt_author">Jean-Claude Micha</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">134</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://africanzoology.journals.ac.za/pub/article/view/495"> <span id="translatedtitle">Daily growth of young-of-the-year of the Baringo tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> baringoensis (Trewavas, 1983</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Otolith microstructure analysis was used to validate microincrement deposition rate and to determine  daily growth rates of young-of-the-year (YOY Baringo tilapia,<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> baringoensis. Microincrement  formation was validated as daily by correlating the number of circuli on otoliths with the known  age of cultured <span class="hlt">fish</span>. For wild young-of-the-year <span class="hlt">fish</span> collected from Lake Baringo, Kenya, in August and October 2007 length was positively correlated with  the age of <span class="hlt">fish</span> (total length (mm = 0.1187 age (/day + 1.1344 (r2 = 0.97; standard length (mm =0.0964 age (/day + 0.7082(r2 = 0.97 and growth rate was subsequently estimated at 0.12 cm/day.</p> <div class="credits"> <p class="dwt_author">Charles C. Ngugi</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">135</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000400032"> <span id="translatedtitle">Triguilho na alimentação da tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.: digestibilidade e desempenho Wheat midlings in the nile tilapia feeding (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.: digestibility and performance</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available No presente experimento objetivou-se determinar os coeficientes de digestibilidade aparente (CDa da proteína bruta (PB e da energia bruta (EB do triguilho para a tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> e avaliar a inclusão do triguilho sobre o desempenho de alevinos de tilápia do Nilo. Para a determinação dos CDa, foram utilizadas 40 tilápias com peso e comprimento médios de 80,00g e 15,9cm, respectivamente, submetidas à coleta das fezes por sedimentação. Para a avaliação do desempenho, foram utilizados 125 alevinos de tilápia do Nilo, com peso inicial médio de 0,80g, distribuídos em 25 aquários com capacidade de 30L, em um delineamento inteiramente casualizado, com cinco tratamentos e cinco repetições. As rações experimentais continham níveis de inclusão de 0,00; 7,97; 14,94; 23,91 e 31,88% de triguilho substituindo até 100% do milho. Os CDas da PB e EB do triguilho foram de 91,03 e 78,72%, respectivamente, apresentando 11,92% de proteína digestível e 3134Kcal kg-1 de energia digestível. Não foi observada diferença (P>0,05 no desempenho dos peixes alimentados com as rações contendo os diferentes níveis de inclusão do triguilho. O triguilho é um alimento com bons CDa da PB e EB e pode ser incluído em até 31,88% em rações para alevinos de tilápia do Nilo sem causar prejuízo no desempenho.This experiment was aimed at determining the apparent digestibility coefficients (ADC of the raw protein (RP and of raw energy (RE of the wheat middling given to the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and evaluating the inclusion of wheat middling on the performance of Nile tilapia fingerlings. In order to determine the ADC, 40 tilapias with the average weight and length of 80g and 15.9cm, respectively, were used and submitted to the collection of the excrements by sedimentation. To the evaluation of the performance 125 fingerlings of Nile tilapia were used, with an initial average weight of 0.80g, distributed into 25 aquariums with a 30L capacity at a random design, with five treatments and five repetitions. The experimental <span class="hlt">fish</span> feed had inclusion levels of 0.00; 7.97; 14.94; 23.91 and 31.88% of wheat middling, substituting corn up to 100%. The ADCs of RP and RE of the wheat middling were 91.03% and 78.72, respectively, presenting 11.92% of digestible protein and 3134kcal kg-1 of digestible energy. No difference was observed (P>0.05 in the performance of the <span class="hlt">fish</span> fed with the <span class="hlt">fish</span> feed having the different levels of inclusion of the wheat middling. The wheat middling is a feed with good ADC of RP and RE and can be included in up to 31.88% in <span class="hlt">fish</span> food for Nile tilapia fingerlings without causing damage in its performance.</p> <div class="credits"> <p class="dwt_author">Arcangelo Augusto Signor</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">136</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000400032&lang=en"> <span id="translatedtitle">Triguilho na alimentação da tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.): digestibilidade e desempenho / Wheat midlings in the nile tilapia feeding (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.): digestibility and performance</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese No presente experimento objetivou-se determinar os coeficientes de digestibilidade aparente (CDa) da proteína bruta (PB) e da energia bruta (EB) do triguilho para a tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) e avaliar a inclusão do triguilho sobre o desempenho de alevinos de tilápia do Nilo. Para a det [...] erminação dos CDa, foram utilizadas 40 tilápias com peso e comprimento médios de 80,00g e 15,9cm, respectivamente, submetidas à coleta das fezes por sedimentação. Para a avaliação do desempenho, foram utilizados 125 alevinos de tilápia do Nilo, com peso inicial médio de 0,80g, distribuídos em 25 aquários com capacidade de 30L, em um delineamento inteiramente casualizado, com cinco tratamentos e cinco repetições. As rações experimentais continham níveis de inclusão de 0,00; 7,97; 14,94; 23,91 e 31,88% de triguilho substituindo até 100% do milho. Os CDas da PB e EB do triguilho foram de 91,03 e 78,72%, respectivamente, apresentando 11,92% de proteína digestível e 3134Kcal kg-1 de energia digestível. Não foi observada diferença (P>0,05) no desempenho dos peixes alimentados com as rações contendo os diferentes níveis de inclusão do triguilho. O triguilho é um alimento com bons CDa da PB e EB e pode ser incluído em até 31,88% em rações para alevinos de tilápia do Nilo sem causar prejuízo no desempenho. Abstract in english This experiment was aimed at determining the apparent digestibility coefficients (ADC) of the raw protein (RP) and of raw energy (RE) of the wheat middling given to the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and evaluating the inclusion of wheat middling on the performance of Nile tilapia fingerlings. [...] In order to determine the ADC, 40 tilapias with the average weight and length of 80g and 15.9cm, respectively, were used and submitted to the collection of the excrements by sedimentation. To the evaluation of the performance 125 fingerlings of Nile tilapia were used, with an initial average weight of 0.80g, distributed into 25 aquariums with a 30L capacity at a random design, with five treatments and five repetitions. The experimental <span class="hlt">fish</span> feed had inclusion levels of 0.00; 7.97; 14.94; 23.91 and 31.88% of wheat middling, substituting corn up to 100%. The ADCs of RP and RE of the wheat middling were 91.03% and 78.72, respectively, presenting 11.92% of digestible protein and 3134kcal kg-1 of digestible energy. No difference was observed (P>0.05) in the performance of the <span class="hlt">fish</span> fed with the <span class="hlt">fish</span> feed having the different levels of inclusion of the wheat middling. The wheat middling is a feed with good ADC of RP and RE and can be included in up to 31.88% in <span class="hlt">fish</span> food for Nile tilapia fingerlings without causing damage in its performance.</p> <div class="credits"> <p class="dwt_author">Arcangelo Augusto, Signor; Wilson Rogério, Boscolo; Aldi, Feiden; Altevir, Signor; Adilson, Reidel.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">137</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/academicjournals/ijzr/2010/13-23.pdf"> <span id="translatedtitle">Responses of the Mullet, Liza auratus and the Cichlid, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> from Lake Manzala (Egypt to Heterophyd Infection</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available In this study, the occurrence of heterophyid infection in two well-known hosts of heterophyd in Egyptian lake (Manzala; the mullet, Liza auratus and the cichlid, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was investigated. Furthermore, the potential factors that possibly affect the occurrence of the infection including host sex, length, weight and seasonal variation were considered. The pathological response of the two <span class="hlt">fish</span> host to the infection was studied. Results showed that the prevalence, abundance and intensity of infection in the two <span class="hlt">fish</span> host greatly affected by the factor considered in contradictory way. The responses to infection and the possible effect of the interaction between all the considered factors are discussed in details. In addition, metacercarial infection caused alterations in the histological architecture of the infected tissues and in the composition of the muscle proteins as well which was more pronounced in O. <span class="hlt">niloticus</span> and L. auratus, respectively. In conclusion, many biological and environmental factors do affect the occurrence of heterophyid infection in addition to the anthropogenic activity. L. auratus was more susceptible to the infection as compared to O. <span class="hlt">niloticus</span> from the same habitat.</p> <div class="credits"> <p class="dwt_author">E.A. Hassan</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">138</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000300001"> <span id="translatedtitle">Energia digestível para alevinos de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Digestible energy for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Avaliou-se o efeito de diferentes níveis de energia digestível na dieta sobre o desempenho de alevinos de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Utilizaram-se 125 alevinos com peso e comprimento iniciais de 0,62±0,12 g e 3,25±0,25 cm, respectivamente, distribuídos em 25 aquários com capacidade de 30 L, em um delineamento experimental inteiramente casualizado, com cinco tratamentos e cinco repetições, em que a unidade experimental consistiu de um aquário contendo cinco alevinos. As rações, isoprotéicas (30% de proteína digestível, isofosfóricas e isocalcíticas, foram formuladas para conter 2.900; 3.025; 3.150; 3.275 e 3.400 kcal/kg de energia digestível. A quantidade de ração fornecida (quatro vezes ao dia correspondeu a 10% da biomassa. Os parâmetros físico-químicos da água (oxigênio dissolvido - OD, pH e condutividade elétrica - CE foram mensurados semanalmente, à tarde, e a temperatura, diariamente, antes da primeira e da última sifonagem, apresentando médias de 8,00±0,05 mg/L; 7,91±0,19; 92,11±2,27 µS/cm e 25,61±0,90ºC, respectivamente. Ao final do experimento, foram analisadas as médias de peso final, ganho de peso, comprimento final, conversão alimentar aparente, sobrevivência e fator de condição. Não foram observadas diferenças no desempenho de alevinos entre os diferentes tratamentos. Recomenda-se a utilização de 2.900 a 3.400 kcal de ED/kg na ração de alevinos de tilápia-do-nilo.The different levels of digestible energy on the performance of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings were evaluated. One hundred and twenty-five fingerlings averaging initial length and weight of 0.62±0.12 and 3.25±0.25 cm were allotted to 25 30L-aquariums, as a completely randomized design with five treatments and five replicates (an aquarium with five fingerlings was considered the experimental unit. The diets, formulated to be isonitrogenous (30% of digestible protein, isophosphorous and isocalcium, contained 3,300, 3,525, 3,750, 3,975, and 4,200 kcal/kg of digestible energy. The amount of diet was fed of 10% of biomass four times a day. The abiotic parameters (pH, dissolved oxigen - DO, and electric condutivity - EC were weekly measured at afternoon and the temperature was was daily mensured. The following values were observed: pH of 7.91±0.19, DO of 8.00±0.05 mg/L, EC of 92.11±2.27 µS/cm, and temperature of 25.61±0.90ºC. At the end of experiment, means of final weight, weight gain, final length, apparent feeding conversion, survival rate and condition factor were analyzed. No significant differences on fingerling perfomance were found across the treatments. It can be included from 2,900 to 3,400 kcal of ED/kg in the diet of Nile tilapia fingerlings.</p> <div class="credits"> <p class="dwt_author">Wilson Rogério Boscolo</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">139</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000300001&lang=en"> <span id="translatedtitle">Energia digestível para alevinos de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Digestible energy for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Avaliou-se o efeito de diferentes níveis de energia digestível na dieta sobre o desempenho de alevinos de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Utilizaram-se 125 alevinos com peso e comprimento iniciais de 0,62±0,12 g e 3,25±0,25 cm, respectivamente, distribuídos em 25 aquários com capacidade de [...] 30 L, em um delineamento experimental inteiramente casualizado, com cinco tratamentos e cinco repetições, em que a unidade experimental consistiu de um aquário contendo cinco alevinos. As rações, isoprotéicas (30% de proteína digestível), isofosfóricas e isocalcíticas, foram formuladas para conter 2.900; 3.025; 3.150; 3.275 e 3.400 kcal/kg de energia digestível. A quantidade de ração fornecida (quatro vezes ao dia) correspondeu a 10% da biomassa. Os parâmetros físico-químicos da água (oxigênio dissolvido - OD, pH e condutividade elétrica - CE) foram mensurados semanalmente, à tarde, e a temperatura, diariamente, antes da primeira e da última sifonagem, apresentando médias de 8,00±0,05 mg/L; 7,91±0,19; 92,11±2,27 µS/cm e 25,61±0,90ºC, respectivamente. Ao final do experimento, foram analisadas as médias de peso final, ganho de peso, comprimento final, conversão alimentar aparente, sobrevivência e fator de condição. Não foram observadas diferenças no desempenho de alevinos entre os diferentes tratamentos. Recomenda-se a utilização de 2.900 a 3.400 kcal de ED/kg na ração de alevinos de tilápia-do-nilo. Abstract in english The different levels of digestible energy on the performance of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fingerlings were evaluated. One hundred and twenty-five fingerlings averaging initial length and weight of 0.62±0.12 and 3.25±0.25 cm were allotted to 25 30L-aquariums, as a completely randomized des [...] ign with five treatments and five replicates (an aquarium with five fingerlings was considered the experimental unit). The diets, formulated to be isonitrogenous (30% of digestible protein), isophosphorous and isocalcium, contained 3,300, 3,525, 3,750, 3,975, and 4,200 kcal/kg of digestible energy. The amount of diet was fed of 10% of biomass four times a day. The abiotic parameters (pH, dissolved oxigen - DO, and electric condutivity - EC) were weekly measured at afternoon and the temperature was was daily mensured. The following values were observed: pH of 7.91±0.19, DO of 8.00±0.05 mg/L, EC of 92.11±2.27 µS/cm, and temperature of 25.61±0.90ºC. At the end of experiment, means of final weight, weight gain, final length, apparent feeding conversion, survival rate and condition factor were analyzed. No significant differences on fingerling perfomance were found across the treatments. It can be included from 2,900 to 3,400 kcal of ED/kg in the diet of Nile tilapia fingerlings.</p> <div class="credits"> <p class="dwt_author">Wilson Rogério, Boscolo; Aldi, Feiden; Altevir, Signor; Arcangelo Augusto, Signor; Jandir José, Bard; Fabio Akira, Ishida.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">140</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/21387995"> <span id="translatedtitle">An outbreak of disease caused by Francisella sp. in Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> at a recirculation <span class="hlt">fish</span> farm in the UK.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">This study details the first diagnosis of Francisella sp. in tilapia in the United Kingdom. Losses of tilapia fry at a recirculation <span class="hlt">fish</span> farm in England were investigated, giving a presumptive positive diagnosis of infection with Francisella sp. by histopathological examination. Most <span class="hlt">fish</span> sampled showed moderate to marked pathology of the major organs, with lesions being present in most tissues. The most obvious host response was granuloma formulation. A subsequent follow-up visit provided further evidence for the presence of a Francisella species. PCR amplicons were obtained using Francisella spp.-specific primers that shared 100% sequence identity with the 16S rRNA gene of the type strain of the species F. asiatica previously described as the cause of disease in tilapia in Southeast Asia and Central America. This outbreak and the subsequent investigation emphasise the importance of strict biosecurity at <span class="hlt">fish</span> farms and the care that needs to be taken when using a new supplier of <span class="hlt">fish</span>. PMID:21387995</p> <div class="credits"> <p class="dwt_author">Jeffery, Keith R; Stone, David; Feist, Stephen W; Verner-Jeffreys, David W</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-09-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_6");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a style="font-weight: bold;">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_8");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">141</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2748"> <span id="translatedtitle">Farinha de peixe em rações para alevinos de tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L., linhagem tailandesa Fishmeal in the diets of Nile tilapia fingerlings <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L., Thai strains</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O objetivo desse experimento foi determinar o nível adequado de incorporação de farinha de peixe (FP em rações para alevinos de tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes, Cichlidae linhagem tailandesa. Foram distribuídos 300 animais com peso inicial médio de 0,42 ± 0,01 g, em 25 tanques-rede, em um delineamento em blocos casualizados com cinco tratamentos (0, 4, 8, 16 e 20% de FP na ração e cinco repetições. Foi observado efeito quadrático (p 0,05 dos níveis da FP sobre a sobrevivência e rendimento de carcaça. Conclui-se que o nível adequado de inclusão de farinha de peixe em rações para alevinos de tilapia do Nilo é de 12,15%.The adequate fishmeal (FM inclusion level in diets for Nile tilapia fingerlings, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes, Cichlidae Thai strain, is provided. Three hundred <span class="hlt">fishes</span> with initial mean average weight of 0.42 ± 0.01 g were distributed in 25 net ponds in a randomized block design with five treatments (0, 4, 8, 16 e 20% of FM in diet and five repetitions. Quadratic effect (p 0,05 did not affect survival and carcass yield. It may be concluded that the appropriate fishmeal inclusion is 12.15% in diets for Nile tilapia fingerlings.</p> <div class="credits"> <p class="dwt_author">Eliana Maria Galdioli</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">142</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/10838930"> <span id="translatedtitle">Growth of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different levels of alcohol yeast.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Two hundred and forty 45-day-old fingerlings of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), sexually reverted with an initial average weight of 1.25 +/- 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these <span class="hlt">fishes</span> depends on the availability and occasional cost. The yeast provides <span class="hlt">fish</span> with good resistance to unfavorable environmental conditions, which could be verified since there were no statistical differences among the treatments with different levels of yeast and the witness. The long growth rate in terms of length and weight can be attributed to the little available space for each specimen, not obeying the limit of populational density, as well as reduction of food ingestion, which coincide with the winter season, above of the absence of natural feeding. PMID:10838930</p> <div class="credits"> <p class="dwt_author">Medri, V; Pereira, G V; Leonhardt, J H</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">143</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:41077956"> <span id="translatedtitle">Effect of Poly Aluminium Chloride (PAC) on some blood constituents of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">Poly aluminium chloride (PAC) is an urban drinking water purification substance that was introduced recently in Sudan and used to substitute polymer poly diallyl dimethyl aluminium chloride (DADMAC) and aluminium sulphate in water purification treatments. This study was conducted to determine its effects on <span class="hlt">fish</span> health, which is is considered a biological indicator and an essential component of fresh water ecosystem. In this experiment, PAC was used in three different concentrations (0.1, 0.2 and 0.3 ml/1) in experimental tanks to achieve the desirable doses for the study. The tanks were populated by Nile Tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) with an average weight ranging between 70 and 100 grams. Exposure of this <span class="hlt">fish</span> to PAC resulted in an immediate signification reduction (P<0.01) in haemoglobin concentration, erythrocytes count, packed cell volume, mean corpuscular volume and mean corpuscular haemoglobin concentration of experimental fingerlings blood. The degree of reduction in these parameters was directly proportional to the concentration of PAC used. (Author)</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">144</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://revista.uft.edu.br/index.php/JBB/article/view/184/132"> <span id="translatedtitle">Molecular characterization of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. in Santa Catarina, Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Fishery plays an important role in the supply of food for the increasing population. Tilapia production exceeded twomillion tons, being the second most important group of <span class="hlt">fish</span> worldwide. Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>Linnaeus, 1758 is the most important species due to the fast growth rates and good acceptance by the consumer.<span class="hlt">Fish</span> genetic improvement is highly based on molecular genetics, including RAPD, and the knowledge obtained inthe last decades gave good results in terms of molecular marker-assisted breeding. In the present work the geneticvariability of four populations of Nile tilapia was assessed using molecular techniques. Modifications in the DNAextraction protocol described by Bardakci and Skibinski (1994 were evaluated, which was followed by theapplication of the RAPD technique, using eight primers and twenty specimens of four tilapia lineages (Bouaké,Chitralada, GST and GIFT. The results from the PCR amplifications were evaluated using the programs NTSysand PopGen. GIFT was the most polymorphic group, with 37% of its loci showing polymorphism, and the groupthat presented the highest Shannon index (0,17. All primers but one (OPA-12 for the lineage Chitralada showedbands that can be used as a diagnostic tool for lineage differentiation. The dendrogram generated with thepolymorphic bands clearly separated the four populations; GIFT and Chitralada presented the highest geneticsimilarity (0,88, whereas GIFT and GST presented the highest genetic distance (0,23.</p> <div class="credits"> <p class="dwt_author">Gustavo Emygdio Halfen</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">145</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23786245"> <span id="translatedtitle">Genotyping of Streptococcus dysgalactiae strains isolated from Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Streptococcus dysgalactiae is an emerging <span class="hlt">fish</span> pathogen that is responsible for outbreaks of disease on <span class="hlt">fish</span> farms around the world. Recently, this bacterium was associated with an outbreak at a Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.), farm in Brazil. The aim of this study was to evaluate the genetic diversity, best genotyping method and aspects of molecular epidemiology of S. dysgalactiae infections in Nile tilapia farms in Brazil. Twenty-one isolates from four farms located in different Brazilian states were characterized genetically using pulsed-field gel electrophoresis (PFGE), ERIC-PCR, REP-PCR and sodA gene sequencing. The discriminatory power of the different typing methods was compared using Simpson's index of diversity. Identical sodA gene sequences were obtained from all isolates, and ERIC-PCR and REP-PCR were unable to discriminate among the isolates. PFGE typing detected three different genetic patterns between the 21 strains evaluated; thus, it was the best genotyping method for use with this pathogen. The strains from Ceará State were genetically divergent from those from Alagoas State. The S. dysgalactiae isolates analysed in this study constituted a genetically diverse population with a clear association between geographical origin and genotype. PMID:23786245</p> <div class="credits"> <p class="dwt_author">Costa, F A A; Leal, C A G; Leite, R C; Figueiredo, H C P</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">146</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od______1664::aafc33fdbe7a691cc70227b1db765d5e"> <span id="translatedtitle">Effect of Different Doses of Inorganic Fertilizer on Water Quality, Primary Productivity and Production of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) in Earthen Ponds</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Earthen ponds (surface area 155 m2 each) were used to study the effect of different doses of inorganic fertilizer on water quality and <span class="hlt">fish</span> production. Each pond was stocked with 150 <span class="hlt">fish</span> of Nile tilapia; <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (25-30 g/<span class="hlt">fish</span>). The ponds received inorganic fertilizer (20:20:5 NPK) with doses of 0, 20, 40, 60 and 100 kg/acre/month. The obtained results revealed that fertilization had no significant effect on water temperature, dissolved oxygen, pH value, free ammonia water condu...</p> <div class="credits"> <p class="dwt_author">Abdel Tawwab, Mohsen</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">147</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::3d5180ccda9039a35eb66f62116660fb"> <span id="translatedtitle">Effect of Dietary Protein Levels on Growth Performance and Body Composition of Monosex Nile Tilapia, <i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. </i>Reared in Fertilized Tanks</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Juvenile monosex Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were fed four dietary protein levels (17%, 25%, 30% and 35%) to investigate their effects on growth performance, carcass composition and survival rate. The experiment was carried out in concrete tanks (2.9m x 1.4m x 1m), stocking each tank with 160 <span class="hlt">fish</span> (50 <span class="hlt">fish</span>/m3). The diets were offered to the <span class="hlt">fish</span> (2.5±0.1g average initial weight ) at a level of 3% of body weight, six days a week for 180 days. In addition to the expe...</p> <div class="credits"> <p class="dwt_author">Bahnasawy, Mohamed H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">148</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000400008"> <span id="translatedtitle">Desempenho da tilápia nilótica <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. em gaiolas de pequeno volume Performance of the nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. raised in small volume cages</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Alevinos de tilápia nilótica <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. com peso médio de 18,85 g, foram estocados em gaiolas de 1,7 m3 cada, em densidades de 75, 150, 300 e 600 peixes/m3 (T75; T150; T300 e T600, num delineamento inteiramente casualizado (4 tratamentos e 3 repetições, e criados por 196 dias, com ração comercial extrusada, flutuante, contendo 28% de proteína bruta. A cada 30 dias, 20% do lote de peixes de cada gaiola foi medido e pesado para determinar ganho de peso (GDP e conversão alimentar (CA de cada tratamento. Os resultados finais de CA e GDP para cada tratamento foram, respectivamente: para T75, 6,31:1 e 71,52g; para T150, 4,08:1 e 65.14g; para T300, 3,57:1 e 59,60g; e para T600, 2,96:1 e 69,17g. Em relação ao ganho de peso, T600 e T75 foram semelhantes (P > 0,01 sendo que T600 apresentou melhor CA que T75 (P To determine the carrying capacity and overall performance of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. in small volume cages, 5,850 sexually inverted fingerlings, averaging 18.85 g of live weight, were stocked in 1.3 m3 cages, at densities of 75, 150, 300, and 600 <span class="hlt">fish</span>/m3 (T75; T150; T300, and T600. The 196-day long trial was set up in a totally randomized design, with 4 treatments and 3 replicates. Cages were set up in a 4-ha, 2 m average depth reservoir. Twenty percent (20% of each cage stock were weighed and measured every 30 d to determine growth rate as weight gain (WG, and feed conversion rate (FCR. <span class="hlt">Fish</span> were fed twice-a-day (09:00 and 17:00 h an extruded, floating, 28% crude protein commercial diet. Feed consumption, mortality and water temperature were recorded at feeding time, and pH, dissolved oxygen (DO and water transparency were recorded monthly. The first evaluation (30-d showed FCR values between 0.68 and 2.40:1, and WG between 11.19 and 21.52 g. Best FCR values were recorded for T600. However, the stock could not repeat or maintain the initial performance level, and final results showed: FCR = 6.31:1 and WG = 71.52 g for T75; FCR = 4.08:1 and WG = 65.14 g for T150; FCR = 3.57:1 and WG = 59.60 g for T300; and FCR = 2.96:1 and WG = 69.17 g for T600. The best WG result was attained by T600, which was not significantly different of T75 (P<0.01. The FCR was better for T600 than for T75. The performance of both T150 and T300 was inferior to T600 and T75. Compared to literature data, the performance of Nile tilapia in this trial was very poor. Low cage effective depth (0.85 cm, causing thermal and brightness stress, poor quality of commercial feed and low sex reversal rate of <span class="hlt">fish</span> stock could explain the unsatisfactory results here obtained.</p> <div class="credits"> <p class="dwt_author">Gustavo Luiz Naslausky Bozano</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">149</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2012/895-899.pdf"> <span id="translatedtitle">Heavy Metal (Lead, Cadmium and Antibiotic (Tetracycline and Chloramphenicol Residues in Fresh and Frozen <span class="hlt">Fish</span> Types (Clarias gariepinus, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Ibadan, Oyo State, Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available This study was carried out to assess the level of heavy metals (lead (Pb and cadmium (Cd and antibiotics (tetracycline and chloramphenicol residues in frozen and fresh <span class="hlt">fish</span> types obtained from Eleyele river, Officer’s mess, Alfa farm and a major frozen meat outlet in Ibadan, Oyo State Nigeria. The Atomic Absorption Spectrophotometer (AAS and High Performance Liquid Chromatography (HPLC were used to analyze the heavy metals and antibiotics residue levels in fresh and frozen <span class="hlt">fish</span>, respectively. The results showed mean concentrations of antibiotics was higher (p<0.05 in fresh than in frozen <span class="hlt">fish</span> samples while there were no significant differences in the mean concentrations of heavy metal residue. The differences of mean residue levels in both antibiotics and heavy metals tested in the cranial and caudal parts of the <span class="hlt">fish</span> samples were not significant (p<0.05. However, there was a significant difference between species (tilapia and catfish and sources. The highest heavy metals and tetraxycline residues were observed in Alfa’s farm (Pb: 0.039±0.004 ppm; Cd: 0.020±0.006 ppm; tetraxycline: 2.185±0.412. Chloramphenicol was highest in Officers mess (0.837±0.165 ppm. The heavy metals (Pb and Cd concentrations determined were below the maximum permissible limits set by both local and international safety agencies. Tetraxcycline exceeded international limits of 0.2 ppm while Chloramphenicol which has a zero tolerance level was also detected from all sources. This study accentuates the need for control of heavy metals and antibiotics in <span class="hlt">fish</span> sold for human consumption in Ibadan, Nigeria. The need to ban chloramphenicol in treatment of <span class="hlt">fish</span> and other animals is emphasised.</p> <div class="credits"> <p class="dwt_author">Popoola Amirah Folashade</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">150</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://spasb.ro/index.php/spasb/article/view/200"> <span id="translatedtitle">The Effects of Some Phytobiotics on Biochemical Composition of <span class="hlt">Oreochromis</span> <span class="hlt">Niloticus</span> Meat Reared in a Recirculating Aquaculture System</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The purpose of this experiment is the evaluation of biochemical composition of Nile tilapia meat by administrating  several phytobiotics in feed. <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, with an initial average weight of 125.41±34.33 g/exemplar, were reared, during six weeks in a recirculating aquaculture system. The phytobiotics from this experiment were administered in feed in a concentration of 1%/kg feed and consist in: thyme (Thymus vulgaris, fenugreek (Trigonela foenum graecum, neem (Azadirachta indica. Thus, the experimental variants were: V1-control, V2-thyme, V3-fenugreek and V4-neem. <span class="hlt">Fish</span> were fed with SOPROFISH pelleted feed with 38% crude protein and 7% crude fat. During the experiment, the physico-chemical parameters of technological water were situated in normal range for optimal growth. At the end of the experiment, significant differences (p<0.05 were recorded between the experimental variants, regarding to moisture, protein content, fat content and dry matter; unsignificant differences were recorded regarding the percentage of ash (p>0.05; p=0.68. The highest value of moisture (87.25% was registered in V2; the lowest value of fat content (0.05% was recorded in V4 and the lowest protein content (10.79% in V2. In conclusion, thyme, fenugreek and neem administration, in concentration of 1%/kg feed, influenced significantly the biochemical composition of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Alina Antache</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">151</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::5b1ebbcb536cca62cf157d1748b03972"> <span id="translatedtitle">Agonistic and reproductive behaviors in males of red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae) Comportamento agonístico e reprodutivo nos machos de híbrido vermelho de tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) is a fertile hybrid used in the semi-intensive level of <span class="hlt">fish</span> culture in the Northeast of Brazil. It is a territorial cichlid and is highly aggressive towards conspecifics during the breeding season. The purpose of this study was to investigate and describe the aggressive behaviour displayed by the males of this hybrid in non-reproductive and reproductive contexts. Behavioural observations revealed t...</p> <div class="credits"> <p class="dwt_author">Apt, Medeiros; Chellappa, S.; Me, Yamamoto</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">152</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200031&lang=en"> <span id="translatedtitle">Identities among actin-encoding cDNAs of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and other eukaryote species revealed by nucleotide and amino acid sequence analyses</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in english Actin-encoding cDNAs of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were isolated by RT-PCR using total RNA samples of different tissues and further characterized by nucleotide sequencing and in silico amino acid (aa) sequence analysis. Comparisons among the actin gene sequences of O. <span class="hlt">niloticus</span> and those o [...] f other species evidenced that the isolated genes present a high similarity to other <span class="hlt">fish</span> and other vertebrate actin genes. The highest nucleotide resemblance was observed between O. <span class="hlt">niloticus</span> and O. mossambicus a-actin and b-actin genes. Analysis of the predicted aa sequences revealed two distinct types of cytoplasmic actins, one cardiac muscle actin type and one skeletal muscle actin type that were expressed in different tissues of Nile tilapia. The evolutionary relationships between the Nile tilapia actin genes and diverse other organisms is discussed.</p> <div class="credits"> <p class="dwt_author">Andréia B., Poletto; Adriane P., Wasko; Claudio, Oliveira; Alexandre, Azevedo; Robson F., Carvalho; Maeli Dal Pai, Silva; Fausto, Foresti; Cesar, Martins.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">153</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200031"> <span id="translatedtitle">Identities among actin-encoding cDNAs of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and other eukaryote species revealed by nucleotide and amino acid sequence analyses</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Actin-encoding cDNAs of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were isolated by RT-PCR using total RNA samples of different tissues and further characterized by nucleotide sequencing and in silico amino acid (aa sequence analysis. Comparisons among the actin gene sequences of O. <span class="hlt">niloticus</span> and those of other species evidenced that the isolated genes present a high similarity to other <span class="hlt">fish</span> and other vertebrate actin genes. The highest nucleotide resemblance was observed between O. <span class="hlt">niloticus</span> and O. mossambicus a-actin and b-actin genes. Analysis of the predicted aa sequences revealed two distinct types of cytoplasmic actins, one cardiac muscle actin type and one skeletal muscle actin type that were expressed in different tissues of Nile tilapia. The evolutionary relationships between the Nile tilapia actin genes and diverse other organisms is discussed.</p> <div class="credits"> <p class="dwt_author">Andréia B. Poletto</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">154</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::fec1348d4f61f7aa14edff03a6b3553d"> <span id="translatedtitle">Accumulation of Heavy Metals in Tilapia <span class="hlt">Fish</span> (<i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></i>) from Al-Khadoud Spring, Al-Hassa, Saudi Arabia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Problem statement: Al-Khadoud Spring is one of the largest spring in Al-Hassa governorate (Saudi Arabia). Due to the extended domestic activities and urbanization as well as the continuous industrial and agricultural growth of the region, spring water quality is potentially changing. Approach: This study was conducted to measure toxic heavy metal concentrations in water and <span class="hlt">fish</span> samples along the spring channel. Filtered spring water and tissues (liver and muscle) of capt...</p> <div class="credits"> <p class="dwt_author">Al-kahtani, Mohammed A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">155</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2012000400006&lang=en"> <span id="translatedtitle">Eutrophization process in a system used for rearing the nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), São Paulo State, Brazil / Processo de eutrofização em um sistema utilizado para a criação da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), São Paulo, Brasil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Dos vários aspectos inerentes à aquicultura, a eutrofização devido ao manejo alimentar tem efeitos diretos no viveiro e no sistema aquático no qual ele está inserido. Neste contexto, o presente estudo objetivou analisar a qualidade da água do sistema aquático de um viveiro. Em uma criação de tilápia [...] do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), foram realizadas coletas de água em seis pontos do sistema aquático, durante um ciclo de engorda (seis meses), compreendendo a água de abastecimento, o viveiro, o efluente e sua mistura com as águas do sistema. Das variáveis ambientais analisadas nas amostras, a aplicação de uma análise de componentes principais revelou que as concentrações de clorofila-a, nitrogênio e fósforo total e o teor de matéria orgânica foram responsáveis pelas variações observadas no sistema durante o cultivo. Variações extrínsecas ao viveiro de cultivo deixaram evidente que o manejo deve ser aplicado a todo o sistema aquático, minimizando efeitos ambientais negativos. Abstract in english Aquaculture is composed of various themes of interest, particularly does eutrophization due to feeding have direct effects on <span class="hlt">fish</span> ponds and the whole aquatic system. This study focused on the study of the water quality of an aquatic system related to Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) rearing. Sa [...] mpling was done at six sites during one rearing cycle (six months), taking water from the source of water supply, the <span class="hlt">fish</span> pond itself, the effluent of the <span class="hlt">fish</span> pond and the mixed waters. A principal component analysis revealed that, among all the environmental variables analyzed, chlorophyll-a, total nitrogen and phosphorus and organic matter were responsible for the variations observed during the rearing cycle. Other sources of variability extrinsic to the <span class="hlt">fish</span> pond make it evident that the assessment must take the entire aquatic system related to the rearing into consideration, minimizing negative effects.</p> <div class="credits"> <p class="dwt_author">Jeniffer Sati, Pereira; Cacilda Thais Janson, Mercante; Julio Vicente, Lombardi; André Martins, Vaz-dos-Santos; Clóvis Ferreira do, Carmo; João Alexandre Saviolo, Osti.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">156</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000400008&lang=en"> <span id="translatedtitle">Desempenho da tilápia nilótica <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) em gaiolas de pequeno volume / Performance of the nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) raised in small volume cages</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Alevinos de tilápia nilótica <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) com peso médio de 18,85 g, foram estocados em gaiolas de 1,7 m3 cada, em densidades de 75, 150, 300 e 600 peixes/m3 (T75; T150; T300 e T600), num delineamento inteiramente casualizado (4 tratamentos e 3 repetições), e criados por 196 dias, com [...] ração comercial extrusada, flutuante, contendo 28% de proteína bruta. A cada 30 dias, 20% do lote de peixes de cada gaiola foi medido e pesado para determinar ganho de peso (GDP) e conversão alimentar (CA) de cada tratamento. Os resultados finais de CA e GDP para cada tratamento foram, respectivamente: para T75, 6,31:1 e 71,52g; para T150, 4,08:1 e 65.14g; para T300, 3,57:1 e 59,60g; e para T600, 2,96:1 e 69,17g. Em relação ao ganho de peso, T600 e T75 foram semelhantes (P > 0,01) sendo que T600 apresentou melhor CA que T75 (P Abstract in english To determine the carrying capacity and overall performance of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) in small volume cages, 5,850 sexually inverted fingerlings, averaging 18.85 g of live weight, were stocked in 1.3 m3 cages, at densities of 75, 150, 300, and 600 <span class="hlt">fish</span>/m3 (T75; T150; T300, and T6 [...] 00). The 196-day long trial was set up in a totally randomized design, with 4 treatments and 3 replicates. Cages were set up in a 4-ha, 2 m average depth reservoir. Twenty percent (20%) of each cage stock were weighed and measured every 30 d to determine growth rate as weight gain (WG), and feed conversion rate (FCR). <span class="hlt">Fish</span> were fed twice-a-day (09:00 and 17:00 h) an extruded, floating, 28% crude protein commercial diet. Feed consumption, mortality and water temperature were recorded at feeding time, and pH, dissolved oxygen (DO) and water transparency were recorded monthly. The first evaluation (30-d) showed FCR values between 0.68 and 2.40:1, and WG between 11.19 and 21.52 g. Best FCR values were recorded for T600. However, the stock could not repeat or maintain the initial performance level, and final results showed: FCR = 6.31:1 and WG = 71.52 g for T75; FCR = 4.08:1 and WG = 65.14 g for T150; FCR = 3.57:1 and WG = 59.60 g for T300; and FCR = 2.96:1 and WG = 69.17 g for T600. The best WG result was attained by T600, which was not significantly different of T75 (P</p> <div class="credits"> <p class="dwt_author">Gustavo Luiz Naslausky, Bozano; Samer Ramos Monteiro, Rodrigues; Alexsandra Carmen, Caseiro; José Eurico Possebon, Cyrino.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">157</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/medwelljournals/javaa/2012/853-857.pdf"> <span id="translatedtitle">The Effects of Different Oils Sources on the Growth Performance and Body Composition of Juvenile Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A total of 600 juvenile <span class="hlt">fish</span> with average initial weight of 2.540.07 g were enrolled to this study to investigate the effects of different oil sources (<span class="hlt">fish</span> oil, soybean oil, linseed oil and beef tallow on the growth performance and body composition of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L. during 14 weeks. Experimental diets were prepared as isonitrogenous (30.76% CP and isocaloric (13.09 MJ DE kg-1. At the end of the study, it was observed that there were no significant differences among the groups for average live weight, live weight gain, feed consumption, Condition Factor (CF, Feed Conversion Ratio (FCR, Protein Efficiency Ratio (PER, Specific Growth Rate (SGR and survival rate (p>0.05 but carcass composition (p<0.05.</p> <div class="credits"> <p class="dwt_author">Sezai A. Bozaoglu</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">158</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ibc7.org/article/journal_v.php?sid=233&page=1"> <span id="translatedtitle">Field Study on the Mycotoxin Binding Effects of Clay in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Feeds and Their Impacts on the Health Status throughout the Culture Season</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Total aflatoxin and ochratoxin were detected in 3 naturally contaminated <span class="hlt">fish</span> feed samples using immune-affinity method. The results revealed that the average levels of aflatoxins in the 3 examined samples were (15, 22 and 12 µg / kg respectively while the average levels of ochratoxins were (15, 6 and 6µg / kg.The levels of aflatoxins and ochratoxins after adding different doses of clay as a mycotoxin binder, revealed that the levels of aflatoxin in the treated samples after using clay at dose 2kg / ton detected as (2,1 and zero respectively and levels of ochratoxins were 12, 2 and 2 respectively. The levels of aflatoxins in the treated samples after using clay at a dose 4kg / ton was (1, zero and zero respectively, while the levels of ochratoxins were 1, zero and zero respectively. The results of determination of the effects of clay on the health status and performance of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in comparing with a control group revealed that the survival rate in control group was 81% after the end of the culture season. The results also revealed that the survival rate in group 2 which received clay treated feed was 86%. The results of regular parasitological examination revealed the identification of trichodina as external protozoa in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> from both ponds but without manifestation of disease signs. The results of bacteriological examination revealed the identification of pseudomonas flouresence from some moribund <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Wael Anwar</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">159</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300012"> <span id="translatedtitle">Evaluation of the performance of two strains of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">Niloticus</span> in mixed raising systems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The aim of this study was to evaluate the productive performance of two strains of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in mixed raising systems. A total of 3600 <span class="hlt">fish</span>-larvae species was used, 1800 belonging to Bouaké lineage, and 1800 to Chitralada. The experiment was carried out in three phases; Phase I in an incubator in 18 boxes, in which two treatments (Bouaké and Chitralada were tested by using nine repetitions; Phases II and III were performed in 18 cement tanks with the same treatments. In phase I, regarding the final weight and gain of weight, Chitralada strain showed the highest final weight values. In phase II, Chitralada showed the highest final weight value when compared with Bouaké, and, considering the gain of weight, Bouaké obtained the best result. In phase III, Chitralada showed better final weight results (104 days of raising, final weight, final length and gain of length/cm (152 days of raising; but, after 279 days of the cultivation, Bouaké showed a higher weight and length gain. These findings showed that Chitralada strain presented the best performance.O objetivo deste trabalho foi avaliar o desempenho produtivo de duas linhagens de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> em sistemas de cultivo misto. Foram utilizados 3600 alevinos de tilápia, 1800 da linhagem Bouaké e 1800 da Chitralada. O experimento foi conduzido em três fases, a Fase I realizada em estufa em 18 caixas, nas quais foram testados dois tratamentos (Bouaké e Chitralada e nove repetições; e a Fase II e III realizadas em 18 tanques de alvenaria, com os mesmos tratamentos. Na fase I, a linhagem Chitralada apresentou os maiores valores para peso final e ganho em peso. Na fase II, a Chitralada apresentou o maior valor para peso final em relação à Bouaké, já para o ganho em peso a Bouaké obteve o melhor resultado. Na fase III, a Chitralada apresentou os melhores resultados para peso final (104 dias de cultivo; peso final, comprimento final e ganho em comprimento (152 dias de cultivo e aos 279 dias de cultivo, o ganho em peso e em comprimento foram maiores para a Bouaké. Estes resultados demonstraram que a linhagem de melhor desempenho foi a Chitralada.</p> <div class="credits"> <p class="dwt_author">Patrícia Ribeiro Neves</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">160</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.mdpi.com/2072-6651/6/1/283"> <span id="translatedtitle">Immunohistochemical Approach to Study Cylindrospermopsin Distribution in Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> under Different Exposure Conditions</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Cylindrospermopsin (CYN is a cytotoxic cyanotoxin produced by several species of freshwater cyanobacteria (i.e., Aphanizomenon ovalisporum. CYN is a tricyclic alkaloid combined with a guanidine moiety. It is well known that CYN inhibits both protein and glutathione synthesis, and also induces genotoxicity and the alteration of different oxidative stress biomarkers. Although the liver and kidney appear to be the main target organs for this toxin based on previous studies, CYN also affects other organs. In the present study, we studied the distribution of CYN in <span class="hlt">fish</span> (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> under two different exposure scenarios using immunohistochemical (IHC techniques. In the first method, <span class="hlt">fish</span> were exposed acutely by intraperitoneal injection or by gavage to 200 µg pure CYN/Kg body weight (bw, and euthanized after 24 h or five days of exposure. In the second method, <span class="hlt">fish</span> were exposed by immersion to lyophilized A. ovalisporum CYN-producing cells using two concentration levels (10 or 100 µg/L for two different exposure times (7 or 14 days. The IHC was carried out in liver, kidney, intestine, and gills of <span class="hlt">fish</span>. Results demonstrated a similar pattern of CYN distribution in both experimental methods. The organ that presented the most immunopositive results was the liver, followed by the kidney, intestine, and gills. Moreover, the immunolabeling signal intensified with increasing time in both assays, confirming the delayed toxicity of CYN, and also with the increment of the dose, as it is shown in the sub-chronic assay. Thus, IHC is shown to be a valuable technique to study CYN distribution in these organisms.</p> <div class="credits"> <p class="dwt_author">Remedios Guzmán-Guillén</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_7");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a style="font-weight: bold;">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_9");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">161</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23460558"> <span id="translatedtitle">Neurotoxic effects of lambda-cyhalothrin modulated by piperonyl butoxide in the brain of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The objective of this research was to investigate the neurotoxic effects of pyrethroid pesticide lambda-cyhalothrin by the modulation of cytochrome P450 with piperonyl butoxide in the brain of juvenile <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. The <span class="hlt">fish</span> were exposed to 0.48 ?g L(-1) (1/6 of the 96-h LC50 ) lambda-cyhalothrin and 10 ?g L(-1) piperonyl butoxide for 96 h and 15 days. tGSH, GSSG, TBARS contents, GPx, GR, GST, and AChE enzymes activities were determined by spectrophotometrical methods and Hsp70 content was analyzed by ELISA technique. Lambda-cyhalothrin had no significant effect on the components of GSH redox system, lipid peroxidation and Hsp70 levels but inhibited AChE activity. In the presence of piperonyl butoxide, lambda-cyhalothrin caused increases in tGSH, GSSG, TBARS and Hsp70 contents, GST activity, and decrease in AChE activity. Present results showed that in the presence of piperonyl butoxide, lambda-cyhalothrin caused neurotoxic effects by increasing oxidative stress. Adaptation to its oxidative stress effects may be supplied by GSH-related antioxidant system. Piperonyl butoxide revealed neurotoxic effect of lambda-cyhalothrin. © 2013 Wiley Periodicals, Inc. Environ Toxicol, 2013. PMID:23460558</p> <div class="credits"> <p class="dwt_author">Piner, Petek; Uner, Nevin</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">162</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/16862309"> <span id="translatedtitle">Heterogeneous growth fingerlings of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: effects of density and initial size variability.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">In this study, the effect of initial heterogeneity of weight and density on heterogeneous growth (HetG) evaluated by the coefficient of the variation of weight in the young Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> of the territorial species was tested. <span class="hlt">Fish</span> were maintained in a glass aquarium (8 and 2 L of water) with two levels of initial heterogeneity of weight: low and high, under two density conditions: low and high, thus constituting four conditions (six replications for each). Initially, the weights of the animals were taken after 8, 16, 22 and 30 days (end of experiment). The results, evaluated by the non-parametric test of Kruskal- Wallis, demonstrated that in the groups where the animals were stored under high initial HetG, there was a reduction of the same and that in the groups where the animals were stored under high density, there was exacerbation or maintained high values of HetG. High density in association with high initial heterogeneity caused more exacerbation of HetG in such a way that the density appeared to be a determining factor for exacerbation or the maintenance of high values of HetG, whereas the initial heterogeneity of the weight could be a secondary factor. PMID:16862309</p> <div class="credits"> <p class="dwt_author">Barbosa, J M; Brugiolo, S S S; Carolsfeld, J; Leitão, S S</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">163</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.enggjournals.com/ijet/docs/IJET13-05-03-039.pdf"> <span id="translatedtitle">ISOLATION AND DETERMINATION OF TYPE I COLLAGEN FROM TILAPIA (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> WASTE</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Tilapia are one of the most widely introduced <span class="hlt">fish</span> globally that has clearly emerged as a promising group in aquaculture. <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was the first Tilapia species to be taken up for large Scaleaquaculture. It is consumed widely due to its deliciousness and rich source of protein. During its processing, the scales, Fins, Skins etc are expelled out as waste Acid solubilized collagen (ASC and Pepsin Solubilizedcollagen (PSC were extracted from these processing wastes. Initial extraction by acid yielded 22% of collagen and subsequent digestion with pepsin yielded 56% on dry weight basis. The total protein of ASC and PSC was determined by Bradford method which contains 68.34mg/ml,23.24 mg/ml respectively. The FT-IR Spectrumshowed that ASC and PSC are helpful in prediction and confirmation of Secondary structure of proteins. The denaturation temperature of ASC was 32?C while for PSC it is 29?C.SEM micrograph showed the fibrousnature of Collagen. This report indicates that Tilapia waste might be useful as a new source of collagen apart from usual bovine and pig skin.</p> <div class="credits"> <p class="dwt_author">S.Sujithra</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">164</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24197701"> <span id="translatedtitle">Effect of vitamin C dietary supplementation in reducing the alterations induced by fenitrothion in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The objective of this study was to investigate the dietary effect of vitamin C in amelioration some of studied alterations induced by fenitrothion in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Nile tilapia was exposed to sub-lethal concentration of fenitrothion 0.04 mg/l (96 h LC50 value was 0.8 mg/l), and basal diet was supplemented with two different dose of vitamin C (500 and 1200 mg/kg B wt/day) for 30 days. Vitamin C supplemented groups showed significant decrease in plasma cortisol and glucose level, enzymes activity of liver and gills (catalase, glutathione-S-transferase and superoxide dismutase) and % of tail DNA damage compared to exposed group. Moreover, <span class="hlt">fish</span> revealed significant increase in total plasma protein, albumin, globulin and A/G ratio. High dose of vitamin C dietary supplementation (1200 mg/kg B wt/day) returns these parameters to its normal levels with no significant difference compared to non exposed control group. These results indicated that incorporation of high dose of vitamin C (1200 mg) in aqua feed for 30 days could be potentially less expensive and effective in reducing the alterations induced by fenitrothion in Nile tilapia. PMID:24197701</p> <div class="credits"> <p class="dwt_author">Abd El-Gawad, Eman A; Abdel Hamid, Omnia M</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">165</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2013/121-126.pdf"> <span id="translatedtitle">Impact of Introduced Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> on Non-native Aquatic Ecosystems</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The global invasion of non-native aquatic ecosystems by Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> is well documented and coincides with their increased use as an aquaculture species. Aquaculture can be defined as the farming of <span class="hlt">fish</span> or other aquatic organisms and it varies considerably in terms of production practices. Generally, freshwater finfish, such as Nile tilapia, are reared in inland ponds (closed systems. However, in several countries, floating cages are increasingly used to rear Nile tilapia in open water bodies. In such systems, escape is inevitable. The Nile tilapia is considered an omnivorous species and it ingests zooplankton, phytoplankton, or debris present in rivers. As a consequence, the release of Nile tilapia into non-native aquatic ecosystems may result in competition for food and space, thereby damaging native species. The wide environmental tolerance and high reproductive rate of Nile tilapia facilitate its use for aquaculture, but also render the species highly invasive. Here, we review the high frequency of Nile tilapia in non-native biodiversity and indicate the existence of the species under feral conditions in every country in which it has been introduced through farming systems.</p> <div class="credits"> <p class="dwt_author">C.E. Fonseca-Alves</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">166</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::e8212fdc4b124d4cb222a6731f5a54f3"> <span id="translatedtitle">Growth of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different levels of alcohol yeast Crescimento das tilápias do Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentadas com diferentes níveis de levedura alcooleira</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Two hundred and forty 45-day-old fingerlings of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), sexually reverted with an initial average weight of 1.25 ± 0.14 g, distributed in a totally casualized delineation, during 330 days. The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the...</p> <div class="credits"> <p class="dwt_author">Medri, V.; Pereira, G. V.; Leonhardt, J. H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">167</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:41094314"> <span id="translatedtitle">Nutritional value of Prosopis juliflora Pods in feeding Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) Fries</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">A feeding experiment was conducted to study the effect of different levels of supplemental Prosopis juliflora on growth performance, feed utilization and chemical composition of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fry (1.36+-0.004). Six isonitrigenous (30.46g 100g-1 crude protein) and isocalorific (0.018 NJ g-1) diets were formulated. Diet 1 (control without supplementing P. juliflora), and diets 2, 3, 4, 5 and 6 were supplemented with different levels (20, 40, 60, 80and 100 g Kg-1) of P. juliflora respectively. The results revealed that harvested gain (g <span class="hlt">fish</span>-1) was significantly higher (P0.05) for <span class="hlt">fish</span> fed 60g Kg-1 P. juliflora, while the lowest value of harvested gain was achieved with <span class="hlt">fish</span> fed free. P. juliflora control diet. Despite that the <span class="hlt">fish</span> fed diet (4) obtained the highest harvesting weight, weight gain, average daily gain and specific growth rate, no significant differences (P<0.05) were observed in an average daily gain (g <span class="hlt">fish</span>-1 day-1) between <span class="hlt">fish</span> fed diet 3, 4, 5 and 6 and in specific growth rate (% day-1) when inclusion level of P. juliflora was increased from 20 to 40 g kg-1 in diets 2 and 3 and from 80 to 100g kg-1 in diets 5 and 6, respectively. Feed intake was increased significantly (P<0.05) with in increasing P. juliflora inclusion level in the experimental diets. No significant differences were observed between the experimental <span class="hlt">fish</span> groups in FCR in spite of the occurrence of a slight decreasing up to 80g kg-1 and PER. Protein productive value (PPV g 100g-1) and energy utilization (EUg 100g-1) were increased significantly (P<0.05) with increasing P. juliflora inclusion level in the experimental diets up to 60g kg-1 and then decreased significantly (P<0.05). <span class="hlt">Fish</span> whole body composition of dry matter and protein were significantly (P<0.05) affected by using P. juliflora in <span class="hlt">fish</span> diets. <span class="hlt">Fish</span> fed diet 4 achieved the highest values of dry matter and crude protein. The results suggested that diet supplemented with 60g kg-1 P. juliflora improved growth performances, feed and nutrients utilization and whole body composition (dry matter, protein and energy content) in Nile tilapia fry. (author)</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">168</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=dedup_wf_001::b81404b27a3ffd93ea29d29899bf49f8"> <span id="translatedtitle">Functionality and Antioxidant Properties of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) as Influenced by the Degree of Hydrolysis</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Freeze dried protein powders (Fresh minced meat, FMM and Hot water dip, HWD) from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were hydrolyzed by Alcalase 2.4 L (Alc), Flavourzyme (Flav) and Neutrase (Neut), and investigated for antioxidant activity and their functional properties. FMM and HWD hydrolysed by Alc, exhibiting superior antioxidant activity, had estimated degrees of hydrolysis (DH) of 23.40% and 25.43%, respectively. The maximum values of the 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2-azino-bis...</p> <div class="credits"> <p class="dwt_author">Mohamed Beva Kelfala Foh; Issoufou Amadou; Betty Mabel Foh; Mohamed Tabita Kamara; Wenshui Xia</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">169</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::979c8502c6c7981b9fd291c668c22af7"> <span id="translatedtitle">Genetic characterisation of four strains of Nile tilapia (<span class="hlt">Oreochromie</span> <span class="hlt">Niloticus</span> L.) using microsatellite markers</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Four domesticated strains of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) were genetically characterized using 14 microsatellite markers and 64 animals per strain. Two strains, Chitralada (AIT) and International Development Research Centers (IDRC) were obtained from the AIT institute, Bangkok, Thailand. The GIFT strain (5th generation) came from NAGRI, Thailand, and the GÖTT strain was supplied by the University of Göttingen, Germany. The average numbers of alleles per marker were 5.0 (GÖTT), 5...</p> <div class="credits"> <p class="dwt_author">Rutten, M. J. M.; Komen, J.; Deerenberg, R. M.; Siwek-gapinska, M. Z.; Bovenhuis, H.</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">170</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400004"> <span id="translatedtitle">Colina e betaína em rações purificadas na nutrição da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Choline and betaine in purified diets for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Problemas metabólicos observados em produções intensivas de tilápias do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> têm sido relacionados à deficiência de colina nas rações. Com o objetivo de avaliar o efeito da suplementação dietética da colina na nutrição da espécie, rações purificadas contendo 0; 375; 750; 1.125; 1.500 ou 1.875 mg de cloreto de colina por kg, foram administradas ad libitum por 42 dias a tilápias do Nilo (5,09 ± 0,14 g, estocados em gaiolas de PVC atóxico (volume = 60 L, alojadas em caixas de polipropileno de 1000 L, em ambiente com condições controladas de temperatura e luminosidade, num delineamento experimental em blocos incompletos casualizados, com três parcelas por bloco (n=5. O ganho de peso (GDP e o índice de conversão alimentar (ICA de todos os tratamentos foram superiores ao controle. Não foram observadas diferenças para a quantidade de lipídios no fígado e tecido corporal, e sobrevivência (S%. Num segundo experimento, os peixes foram alimentados com rações suplementadas com 1.250 ou 2.500 mg de cloreto de colina por kg; ou 1.000; 2.000 ou 3.000 mg de betaína por kg. Não foram observadas diferenças significativas para S% e acúmulo de lipídeos hepáticos ou corporais; o ICA e GDP dos tratamentos suplementados com colina foram superiores aos dos tratamentos suplementados com betaína, mas não diferiram entre si. Níveis de suplementação superiores a 375 mg de cloreto de colina por kg de alimento melhoram o ICA e o GDP da tilápia do Nilo, mas a betaína não substitui efetivamente a colina em rações para a espécie.Metabolic problems detected in intensively raised Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> are credited to possible sub-supplementation of coline in commercial feeds. To investigate the utilization of choline and betaine as feed supplement for the Nile tilapia, groups of 10 fingerlings (5.09 ± 0.14 g stocked in 30 PVC cages (60 L, kept under controlled environmental conditions inside 1000-L plastic pools, were fed to satiation, for 42 days, with purified diets supplemented with 0, 375, 750, 1125, 1500 or 1875 mg of choline chloride per kg of feed. Trial was set up in an incomplete, totally randomized block design (n=5. There were no significant differences among treatments for total body and liver lipid contents, and survival rate (S%; there were significant differences for weight gain (WG and food conversion ratio (FCR between the control and all the other treatments, but not between supplementation levels. A second trial (52 days evaluated the effects of higher rates of choline -- 1250 or 2500 mg per kg of feed, and the substitution of choline by betaine in the diets -- 1000, 2000 or 3000 mg of betaine per kg of feed. There were no significant differences among treatments for total body and liver lipid contents, and S%, but the FCR and WG of <span class="hlt">fish</span> fed betaine-supplemented and control diets were significantly worse. There were no differences on the performance among groups fed the choline-supplemented diets. Supplementation of 375 mg of choline per kg of feed met nutritional requirements of Nile tilapia, and betaine did not substitute choline effectively in diets for the species.</p> <div class="credits"> <p class="dwt_author">Ivan Vieira</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">171</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______908::37c388edc83d7ea359b55c437fdb8a91"> <span id="translatedtitle">A comparative study on the effects of a pesticide (cypermethrin) and two metals (copper, lead) to serum biochemistry of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The present study was designed to compare the responses in freshwater <span class="hlt">fish</span> <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to a synthetic pyrethroid, cypermethrin (CYP); an essential metal, copper (Cu); and a nonessential metal, lead (Pb). <span class="hlt">Fish</span> were exposed to 0.05 ?g/l CYP, 0.05 mg/l Cu, and 0.05 mg/l Pb for 4 and 21 days, and the alterations in serum enzyme activities, metabolite, and ion levels were determined. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities increased in ...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">172</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::2b15e9e93ea759bdabd6d92115979dd3"> <span id="translatedtitle">Eco-Histopathology of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and African Catfish (Clarias gariepinus) from Industrially Contaminated Locations of Ologe Lagoon, South-western, Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary"><p>A study was carried out to assess the physico-chemical, heavy-metals parameter and Histopathology of adult <span class="hlt">fish</span> specimen of <em><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></em> and <em>Clarias gariepinus</em> collected from effluents sources of Ologe lagoon. The aim of the study is to assess the impact of industrial effluents on the lagoon, and on the health of resident <span class="hlt">fish</span> fauna. 5 sample stations were marked out. Water samples were collected in triplicates; once every two months...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">173</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::7ada8761bba6496c56acf884761d2099"> <span id="translatedtitle">The Effects of Different Oils Sources on the Growth Performance and Body Composition of Juvenile Nile Tilapia (<I><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></I>, L.)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">A total of 600 juvenile <span class="hlt">fish</span> with average initial weight of 2.540.07 g were enrolled to this study to investigate the effects of different oil sources (<span class="hlt">fish</span> oil, soybean oil, linseed oil and beef tallow) on the growth performance and body composition of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, L.) during 14 weeks. Experimental diets were prepared as isonitrogenous (30.76% CP) and isocaloric (13.09 MJ DE kg-1). At the end of the study, it was observed that there were no significa...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">174</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:34003601"> <span id="translatedtitle">Determination of some heavy metals in <span class="hlt">oreochromis</span> <span class="hlt">niloticus</span>, clarias gariepinus and synodontis spp from the coastal water of Ondo State, Nigeria</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">Some heavy metals (Pb, Ni, Fe, Cu, Zn, Cd, Co, Mn, and Cr) were determined in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, Clarias graiepinus and Synodontis spp obtained from the coastal water of Ondo State. All metals examined and detected in all <span class="hlt">fish</span> samples. Iron, manganese and cadmium were found to be the most abundant metals in the <span class="hlt">fish</span> samples with an average values of 35.8, 31.3, and 12.5 mg kg-1 respectively. Except for manganese, iron and cadmium, Syndrontis spp has the highest concentration for virtually all the metals under examination. (author)</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2002-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">175</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::67722d9679e8d3db28a6dd3d943819d4"> <span id="translatedtitle">Simulation of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> <span class="hlt">niloticus</span> L.) culture in ponds, through individual-based modelling, using a population dynamic approach</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">A simulation model for the production of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> <span class="hlt">niloticus</span> L.) for mixed- or mono-sex culture and for poly-culture with the African catfish (Clarias gariepinus Burchell 1822) or African snakehead (Parachanna obscura Günther 1861) is presented. The model is based on an exponential decay model used in population dynamics and follows an individual-based approach. The model consists of a tilapia sub-model representing population dynamics, growth and recruitment an...</p> <div class="credits"> <p class="dwt_author">Graaf, G. J.; Dekker, P. J.; Huisman, E. A.; Verreth, J. A. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">176</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2441"> <span id="translatedtitle">Desempenho produtivo da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. em diferentes densidades e trocas de água em “raceway” Productive performance of the nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. in tanks with different water exchanges and stocking density in raceway</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Avaliou-se o desempenho produtivo dos alevinos de tilápia do Nilo, (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. (Perciformes Cichlidae estocados nas densidades de 90, 120 e 150 peixes/tanque, em 24 tanques circulares com 0,5 m³, em duas trocas totais de água (30 e 60 minutos, no sistema “raceway”. Utilizou-se o delineamento inteiramente casualizado, em esquema fatorial 3x2, para análise dos dados. Após 128 dias, o peso final e o ganho de peso foram superiores na maior troca de água e menor densidade; a conversão alimentar não alterou significativamente; a biomassa total aumentou com o aumento da renovação de água e densidade de estocagem de 120 e 150 peixes/m³; a taxa de crescimento específico aumentou na maior renovação da água; os rendimentos de filé e de carcaça diminuíram com a menor troca de água nas maiores densidades de estocagem. Os melhores resultados ocorreram com troca total de água em 30 minutos, nas densidades de estocagem de 120 e 150 peixes/m³.Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. (Perciformes Cichlidae fingerlings were stocked at 90, 120 and 150 <span class="hlt">fishes</span> in 24 circular tanks (0,5 m³, submitted to two full water exchanges, in a 30 and 60 minutes, in raceway system, to evaluate productive performance. The performance results were analyzed through a completely randomized design, in a 3x2 factorial scheme. After 128 days, the final weight and the weight gain were higher in larger water exchange and lower stocking density. The feed conversion ratio with non-significant statistical differences. The total biomass increased with the water exchange and stocking density increasing for 120 and 150 <span class="hlt">fishes</span>/m³; the specific growth ratio increased with water exchange increasing; the fillet yield and the carcass yield decreased significantly with lower water exchange and bigger stocking density. In this research, it was concluded that the best performance parameters were obtained with full water exchange in 30 minutes, at bigger stocking densities.</p> <div class="credits"> <p class="dwt_author">Paulo César Silva</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">177</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.etde.org/etdeweb/details.jsp?query_id=1&page=0&osti_id=20686788"> <span id="translatedtitle">Induction of micronuclei and nuclear abnormalities in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> following exposure to petroleum refinery and chromium processing plant effluents</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="https://www.etde.org/etdeweb/fieldedsearch.jsp">Energy Technology Data Exchange (ETDEWEB)</a></p> <p class="result-summary">The genotoxic effects of effluents from a petroleum refinery and a chromium processing plant were evaluated in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces: Perciformes) using the micronucleus test. <span class="hlt">Fish</span> were exposed to different concentrations (5, 10 and 20%, v/v) of the effluents for 3, 6 and 9 days. Micronucleus analyses were carried out on gill epithelial cells and peripheral blood erythrocytes. Nuclear abnormalities other than micronuclei, considered as genetic damage indicators, were also evaluated on erythrocytes. Cyclophosphamide at a single dose of 4 mg/L was used as a positive control. The results of this study showed that both effluents had genotoxic potential. On the other hand, the level of genetic damage induced by petroleum refinery effluent was considerably higher than that of chromium processing plant effluent. Our results further indicate that nuclear abnormalities other than micronuclei, such as blebbed and lobed nuclei, may also be used as indicators of genotoxic damage.</p> <div class="credits"> <p class="dwt_author">Cavas, Tolga [Mersin University, Faculty of Sciences and Letters, Department of Biology, 33342 Mersin (Turkey)]. E-mail: tcavas@mersin.edu.tr; Ergene-Goezuekara, Serap [Mersin University, Faculty of Sciences and Letters, Department of Biology, 33342 Mersin (Turkey)</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-09-10</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">178</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______370::4d3d43bbf51e66b8a3e023f768aa003a"> <span id="translatedtitle">Mating systems and male reproductive success in Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) in breeding hapas: A microsatellite analysis</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Fry production in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> is typically achieved by mass spawning of males and females stocked in large hapas suspended in ponds. In such spawning aggregations, territorial behavior and reproductive competition among males may lead to a large variance in reproductive success among individual males. We analyzed parentage and quantified male reproductive success of O. <span class="hlt">niloticus</span> under commercial hatchery conditions in two breeding hapas each stocked with 12 males and 2...</p> <div class="credits"> <p class="dwt_author">Fessehaye, Y.; El-bialy, Z.; Rezk, M. A.; Crooijmans, R. P. M. A.; Bovenhuis, H.; Komen, J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">179</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::0e9b34b79c9048c3cef26054d5348a1f"> <span id="translatedtitle">Reproduction, food dynamics and exploitation level of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes: Cichlidae) from artisanal fisheries in Barra Bonita Reservoir, Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), which is exotic to South America, is the most common species caught in artisanal fisheries at the Barra Bonita Reservoir, Southeastern Brazil. This species is of great socioeconomic importance for the region and keeps active a population of about 500 fishers. In the present study we assess reproduction, food dynamics and level of exploitation of O. <span class="hlt">niloticus</span>, caught by artisanal fisheries in the Barra Bonita Reservoir. Specimens were collected monthly, fr...</p> <div class="credits"> <p class="dwt_author">José Luis Costa Novaes; Edmir Daniel Carvalho</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">180</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2920"> <span id="translatedtitle">Fontes de fibra bruta em dietas de alevinos de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Fiber sources in diet performance of Nile tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O presente trabalho, realizado no Laboratório de Aquicultura DBI/UEM, avaliou o bagaço de cana (BC, bagaço de cana hidrolizado (BH, sabugo de milho (SM e casca de arroz (CA como fontes de fibra bruta em rações para alevinos de tilápia-do-nilo, durante 37 dias. Foram utilizados 240 alevinos de tilápia-do-nilo, com peso inicial de 0,60 ? 0,01g, distribuídos em um delineamento em blocos casualizados com quatro tratamentos e seis repetições, sendo cada unidade experimental constituída por um tanque-rede com capacidade para 160L. O peso final dos animais alimentados com a ração contendo SM foi superior (p 0,05 do BH e CA, para o comprimento final o SM foi superior (p 0,05. Para a percentagem de ganho de peso o SM e o BH foram similares (p > 0,05 e superiores (p Fiber sources, namely, sugar cane bagasse (CB, hydrolyzed sugar cane bagasse (HB, corn cob (CC and rice hulls (RH, were evaluated for their performance in diets of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerling. Experiment lasted 37 days and was done at the Aquaculture Lab of the State University of Maringá, Maringá PR Brazil. 240 fingerlings, mean initial weight 0,60?0,01g, were employed. Distributed in completely randomized blocks design, the <span class="hlt">fish</span> underwent four treatments and six replications. Each experimental unit consisted of 160 L pens. Mean final weight of Nile tilapia fingerlings fed on CC diet was higher than those fed on CB (p < 0.05. HB and RH, however, showed no difference from results with other diets. In final length CC was better (p < 0.05 than CB and RH and there was no difference in HB when compared to other treatments. Concerning weight gain ratio, CC and HB were alike and both were better than RH and CB. With regard to Nile tilapia fingerling performance CC and HB have better fiber sources than CB and RH.</p> <div class="credits"> <p class="dwt_author">Wilson Rogério Boscolo</p> <p class="dwt_publisher"></p> <p class="publishDate">2000-05-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_8");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a style="font-weight: bold;">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_10");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">181</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::86416f52fd16abc8f2276abdd67979e1"> <span id="translatedtitle">Effect of Feeding Different Grain Sources on the Growth Performance and Body Composition of Tilapia, (<i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></i>) Fingerlings Fed in Outdoor Hapas</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The study investigated the growth performance and body composition of tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L) fingerlings (4.70g ? 0.09) fed Isonitrogenous and Isoenergetic diet of 25% crude protein containing different grain sources (maize, wheat, rice, sorghum and millet) designated DT1, DT2, DT3, DT4 and DT5 respectively. The study lasted for 56 days. <span class="hlt">Fish</span> fed a diet containing maize gave the highest mean weight gain (MWG) of 6.05g; highest specific growth rate (SGR) of 1.47; be...</p> <div class="credits"> <p class="dwt_author">Solomon, S. G.; Tiamiyu, L. O.; Agaba, U. J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">182</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od______1688::0f7909d7a3189d6c604bd0786272b94c"> <span id="translatedtitle">First evidence for family-specific QTL for temperature-dependent sex reversal in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">This study for the first time screens microsatellite markers for associations with the temperature-dependent sex of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Previous studies revealed markers on linkage groups (LG) 1, 3, and 23 to be linked to the phenotypic sex of <span class="hlt">Oreochromis</span> spp. at normal rearing temperatures. Moreover, candidate genes for sex determination and differentiation have been mapped to these linkage groups. Here, 6 families of a temperature-treated genetically all-female (XX) F(1)-population were ...</p> <div class="credits"> <p class="dwt_author">Lu?hmann, L. M.; Knorr, C.; Ho?rstgen-schwark, G.; Wessels, S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">183</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100012&lang=en"> <span id="translatedtitle">Characterization and evaluation of the impact of feed management on the effluents of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) culture</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese O objetivo deste trabalho foi avaliar o efeito da utilização de diferentes manejos alimentares: alimento natural, ração peletizada, extrusada ou farelada, sobre a qualidade da água dos efluentes gerados em uma criação de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). O experimento foi desenvolvido durante [...] 19 semanas em doze viveiros de 300 m², com renovação contínua de água, povoados com juvenis machos de tilápia do Nilo na densidade de 1,7 peixes m-2. As rações isoproteícas (30% de proteína bruta) e isoenergéticas (3.000kcal de energia digestível) foram fornecidas duas vezes ao dia. Quanto ao tratamento alimento natural, foi utilizado esterco de galinha poedeira. Semanalmente, foram aferidos na água de abastecimento e nos efluentes, temperatura, oxigênio dissolvido, pH, fósforo total, nitrogênio total, clorofila a e material em suspensão. De maneira geral, houve piora na qualidade da água dos efluentes de todos os tratamentos estudados, em comparação a água de abastecimento, evidenciando o impacto ambiental desta atividade produtiva, podendo levar a eutrofização dos corpos d'água receptores. Abstract in english The objective of this study was to evaluate the effect of different feed management on the quality of effluent water generated in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) culture ponds. Feed was supplied as follows: natural food, and pelleted, extruded or minced ration. The study was conducted during 19 [...] weeks in 12 continuous water exchange ponds of 300 m² each, with a population of male Nile tilapia juveniles, in a density equal to 1.7 <span class="hlt">fish</span> m-2. Feeds contained 30% crude protein, 3,000 kcal digestible energy, and were supplied twice a day. Natural food consisted of chicken manure. Temperature, dissolved oxygen, pH, total phosphorus, total nitrogen, chlorophyll a and suspended solids were monitored weekly in the supplying and effluent water. Water residence time was also determined for the ponds. In general, effluent water quality decreased in all treatments.</p> <div class="credits"> <p class="dwt_author">Ana Eliza, Baccarin; Antonio Fernando Monteiro, Camargo.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">184</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100012"> <span id="translatedtitle">Characterization and evaluation of the impact of feed management on the effluents of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> culture</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The objective of this study was to evaluate the effect of different feed management on the quality of effluent water generated in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> culture ponds. Feed was supplied as follows: natural food, and pelleted, extruded or minced ration. The study was conducted during 19 weeks in 12 continuous water exchange ponds of 300 m² each, with a population of male Nile tilapia juveniles, in a density equal to 1.7 <span class="hlt">fish</span> m-2. Feeds contained 30% crude protein, 3,000 kcal digestible energy, and were supplied twice a day. Natural food consisted of chicken manure. Temperature, dissolved oxygen, pH, total phosphorus, total nitrogen, chlorophyll a and suspended solids were monitored weekly in the supplying and effluent water. Water residence time was also determined for the ponds. In general, effluent water quality decreased in all treatments.O objetivo deste trabalho foi avaliar o efeito da utilização de diferentes manejos alimentares: alimento natural, ração peletizada, extrusada ou farelada, sobre a qualidade da água dos efluentes gerados em uma criação de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. O experimento foi desenvolvido durante 19 semanas em doze viveiros de 300 m², com renovação contínua de água, povoados com juvenis machos de tilápia do Nilo na densidade de 1,7 peixes m-2. As rações isoproteícas (30% de proteína bruta e isoenergéticas (3.000kcal de energia digestível foram fornecidas duas vezes ao dia. Quanto ao tratamento alimento natural, foi utilizado esterco de galinha poedeira. Semanalmente, foram aferidos na água de abastecimento e nos efluentes, temperatura, oxigênio dissolvido, pH, fósforo total, nitrogênio total, clorofila a e material em suspensão. De maneira geral, houve piora na qualidade da água dos efluentes de todos os tratamentos estudados, em comparação a água de abastecimento, evidenciando o impacto ambiental desta atividade produtiva, podendo levar a eutrofização dos corpos d'água receptores.</p> <div class="credits"> <p class="dwt_author">Ana Eliza Baccarin</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">185</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22387602"> <span id="translatedtitle">Oxidative and apoptotic effects of lambda-cyhalothrin modulated by piperonyl butoxide in the liver of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The aim of this study was to investigate the toxic effects of pyrethroid pesticide lambda-cyhalothrin in the presence of piperonyl butoxide as a modulator in the liver of juvenile <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. LC(50) (96h) value of lambda-cyhalothrin was determined as 2.901?g/L for O. <span class="hlt">niloticus</span>. The <span class="hlt">fish</span> were exposed to 0.48?g/L (1/6 of the 96-h LC(50)) lambda-cyhalothrin and 10?g/L piperonyl butoxide for 96-h and 15-d. tGSH, GSH, GSSG, Hsp70 and TBARS contents, GPx, GR, GST and caspase-3 enzymes activities were determined. Lambda-cyhalothrin caused increases in tGSH, GSH, TBARS contents, and GST activity. Piperonyl butoxide treatment with lambda-cyhalothrin caused significant increases in tGSH GSH, Hsp70, TBARS contents, and GPx and GST activities while caspase-3 activity was decreased. The results of the present study revealed that lambda-cyhalothrin caused oxidative stress which upregulated GSH and GSH-related enzymes. Piperonyl butoxide increased the oxidative stress potential and apoptotic effects of lambda-cyhalothrin. PMID:22387602</p> <div class="credits"> <p class="dwt_author">Piner, Petek; Uner, Nevin</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">186</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24051243"> <span id="translatedtitle">Oxidative stress and apoptosis was induced by bio-insecticide spinosad in the liver of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">This study was conducted to investigate acute toxic effects of spinosad on Glutathione-related oxidative stress markers, lipid peroxidation, heat shock proteins, apoptosis in the liver of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> selected as a model organism. The <span class="hlt">fish</span> were exposed to sublethal spinosad concentrations (25, 50, 75 mg/L) for 24-48-72 h. tGSH, GSH, GSSG, and TBARS contents, GSH/GSSG ratio, and GPx, GR, GST and caspase enzyme activities were measured using spectrophotometrical methods, and Hsp70 content was measured by ELISA technique. The results demonstrated that spinosad exposure caused significant alterations in the GSH-related oxidative stress markers, and also caused increases in lipid peroxidation and stress proteins with inducing ROS generation in the liver. Apoptosis initiated with the induction of caspase-3 and Hsp70 could not protect the liver cells. Our results indicated that GSH-related antioxidant system tried to protect the liver cells from spinosad-induced hepatotoxicity however, the oxidative stress resulting from induction of ROS generation induced apoptosis in the liver of O. <span class="hlt">niloticus</span>. PMID:24051243</p> <div class="credits"> <p class="dwt_author">Piner, Petek; Üner, Nevin</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">187</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://journal.frontiersin.org/Journal/10.3389/fendo.2013.00184/full"> <span id="translatedtitle">Thyroid Hormone Upregulates Hypothalamic kiss2 Gene in the Male Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Kisspeptin has recently been recognized as a critical regulator of reproductive function in vertebrates. During the sexual development, kisspeptin neurons receive sex steroids feedback to trigger gonadotropin-releasing hormone (GnRH neurons. In teleosts, a positive correlation has been found between the thyroid status and the reproductive status. However, the role of thyroid hormone in the regulation of kisspeptin system remains unknown. We cloned and characterized a gene encoding kisspeptin (kiss2 in a cichlid <span class="hlt">fish</span>, the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Expression of kiss2 mRNA in the brain was analyzed by in situ hybridization. The effect of thyroid hormone (triiodothyronine, T3 and hypothyroidism with methimazole (MMI on kiss2 and the three GnRH types (gnrh1, gnrh2 and gnrh3 mRNA expression was analyzed by real-time PCR. Expression of thyroid hormone receptor mRNAs were analyzed in laser-captured kisspeptin and GnRH neurons by RT-PCR. The kiss2 mRNA expressing cells were seen in the nucleus of the lateral recess in the hypothalamus. Intraperitoneal administration of T3 (5µg/g body weight to sexually mature male tilapia significantly increased kiss2 and gnrh1 mRNA levels at 24 hr post injection (P < 0.001, while the treatment with an anti-thyroid, MMI (100 ppm for 6 days significantly reduced kiss2 and gnrh1 mRNA levels (P < 0.05. gnrh2, gnrh3 and thyrotropin-releasing hormone mRNA levels were insensitive to the thyroid hormone manipulations. Furthermore, RT-PCR showed expression of thyroid hormone receptor mRNAs in laser-captured GnRH neurons but not in kiss2 neurons. This study shows that GnRH1 may be directly regulated through thyroid hormone, while the regulation of Kiss2 by T3 is more likely to be indirect.</p> <div class="credits"> <p class="dwt_author">SatoshiOgawa</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">188</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3839095&rendertype=abstract"> <span id="translatedtitle">Thyroid Hormone Upregulates Hypothalamic kiss2 Gene in the Male Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Kisspeptin has recently been recognized as a critical regulator of reproductive function in vertebrates. During the sexual development, kisspeptin neurons receive sex steroids feedback to trigger gonadotropin-releasing hormone (GnRH) neurons. In teleosts, a positive correlation has been found between the thyroid status and the reproductive status. However, the role of thyroid hormone in the regulation of kisspeptin system remains unknown. We cloned and characterized a gene encoding kisspeptin (kiss2) in a cichlid <span class="hlt">fish</span>, the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Expression of kiss2 mRNA in the brain was analyzed by in situ hybridization. The effect of thyroid hormone (triiodothyronine, T3) and hypothyroidism with methimazole (MMI) on kiss2 and the three GnRH types (gnrh1, gnrh2, and gnrh3) mRNA expression was analyzed by real-time PCR. Expression of thyroid hormone receptor mRNAs were analyzed in laser-captured kisspeptin and GnRH neurons by RT-PCR. The kiss2 mRNA expressing cells were seen in the nucleus of the lateral recess in the hypothalamus. Intraperitoneal administration of T3 (5??g/g body weight) to sexually mature male tilapia significantly increased kiss2 and gnrh1 mRNA levels at 24?h post injection (P?<?0.001), while the treatment with an anti-thyroid, MMI (100?ppm for 6?days) significantly reduced kiss2 and gnrh1 mRNA levels (P?<?0.05). gnrh2, gnrh3, and thyrotropin-releasing hormone mRNA levels were insensitive to the thyroid hormone manipulations. Furthermore, RT-PCR showed expression of thyroid hormone receptor mRNAs in laser-captured GnRH neurons but not in kiss2 neurons. This study shows that GnRH1 may be directly regulated through thyroid hormone, while the regulation of Kiss2 by T3 is more likely to be indirect.</p> <div class="credits"> <p class="dwt_author">Ogawa, Satoshi; Ng, Kai We; Xue, Xiaoyu; Ramadasan, Priveena Nair; Sivalingam, Mageswary; Li, Shuisheng; Levavi-Sivan, Berta; Lin, Haoran; Liu, Xiaochun; Parhar, Ishwar S.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">189</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23226256"> <span id="translatedtitle">Five different piscidins from Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: analysis of their expressions and biological functions.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Piscidins are antimicrobial peptides (AMPs) that play important roles in helping <span class="hlt">fish</span> resist pathogenic infections. Through comparisons of tilapia EST clones, the coding sequences of five piscidin-like AMPs (named TP1?5) of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, were determined. The complete piscidin coding sequences of TP1, -2, -3, -4, and -5 were respectively composed of 207, 234, 231, 270, and 195 bases, and each contained a translated region of 68, 77, 76, 89, and 64 amino acids. The tissue-specific, Vibrio vulnificus stimulation-specific, and Streptococcus agalactiae stimulation-specific expressions of TP2, -3, and -4 mRNA were determined by a comparative RT-PCR. Results of the tissue distribution analysis revealed high expression levels of TP2 mRNA in the skin, head kidneys, liver, and spleen. To study bacterial stimulation, S. agalactiae (SA47) was injected, and the TP4 transcript was upregulated by >13-fold (compared to the wild-type (WT) control, without injection) and was 60-fold upregulated (compared to the WT control, without injection) 24 h after the S. agalactiae (SA47) injection in the spleen and gills. Synthesized TP3 and TP4 peptides showed antimicrobial activities against several bacteria in this study, while the synthesized TP1, -2, and -5 peptides did not. The synthesized TP2, -3, and -4 peptides showed hemolytic activities and synthesized TP3 and TP4 peptides inhibited tilapia ovary cell proliferation with a dose-dependent effect. In summary, the amphiphilic ?-helical cationic peptides of TP3 and TP4 may represent novel and potential antimicrobial agents for further peptide drug development. PMID:23226256</p> <div class="credits"> <p class="dwt_author">Peng, Kuan-Chieh; Lee, Shu-Hua; Hour, Ai-Ling; Pan, Chieh-Yu; Lee, Lin-Han; Chen, Jyh-Yih</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">190</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22797471"> <span id="translatedtitle">First evidence for family-specific QTL for temperature-dependent sex reversal in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">This study for the first time screens microsatellite markers for associations with the temperature-dependent sex of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Previous studies revealed markers on linkage groups (LG) 1, 3, and 23 to be linked to the phenotypic sex of <span class="hlt">Oreochromis</span> spp. at normal rearing temperatures. Moreover, candidate genes for sex determination and differentiation have been mapped to these linkage groups. Here, 6 families of a temperature-treated genetically all-female (XX) F(1)-population were genotyped for 21 microsatellites on the 3 LGs. No population-wide QTL (quantitative trait loci) or marker trait associations could be detected. However, family-specific QTL were found on LG 1 flanked by UNH995 and UNH104, on LG 3 at the position of GM213, and on LG 23 next to GM283. Moreover, family-specific single marker associations for UNH995 and UNH104 on LG 1, GM213 on LG 3, as well as for UNH898 and GM283 on LG 23 were detected. Yet, marker trait associations could not explain the temperature-dependent sex of all <span class="hlt">fish</span> in the respective families. The molecular cue for the temperature-dependent sex in Nile tilapia might partially coincide with allelic variants at major and minor genetic sex determining factors. Moreover, additional QTL contributing to variable liabilities towards temperature might persist on other LGs. PMID:22797471</p> <div class="credits"> <p class="dwt_author">Lühmann, L M; Knorr, C; Hörstgen-Schwark, G; Wessels, S</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">191</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/18662361"> <span id="translatedtitle">Effect of housefly maggot meal (magmeal) diets on the performance, concentration of plasma glucose, cortisol and blood characteristics of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">A 56-day feeding trial was conducted to access the effect of housefly maggot meal (magmeal) diets on the performance, concentration of plasma glucose, cortisol and blood characteristics of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings. Seven feeds formulated to contain 36% protein and 20 kJ g(-1) gross energy (dry matter basis), were prepared by replacing <span class="hlt">fish</span> meal with magmeal. Fifteen fingerlings (initial average weight 2.0 +/- 0.1 g) stocked per experimental tank were fed in triplicates at 5% body weight in two portions per day (a level previously established). Growth and food conversion ratio were adequate and comparable without any significant differences (p <span class="hlt">niloticus</span> fingerling with magmeal diets did not cause any form of physiological stress. Magmeal can be used as a good alternative protein source in tilapia diets. PMID:18662361</p> <div class="credits"> <p class="dwt_author">Ogunji, J O; Kloas, W; Wirth, M; Neumann, N; Pietsch, C</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">192</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/18278323"> <span id="translatedtitle">Agonistic and reproductive behaviors in males of red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) is a fertile hybrid used in the semi-intensive level of <span class="hlt">fish</span> culture in the Northeast of Brazil. It is a territorial cichlid and is highly aggressive towards conspecifics during the breeding season. The purpose of this study was to investigate and describe the aggressive behaviour displayed by the males of this hybrid in non-reproductive and reproductive contexts. Behavioural observations revealed that aggression displayed by the reproductive males of red hybrid tilapia included threatening, undulation, parallel, lateral and frontal attacks, chasing, escape and submission. Possession of a territory influenced male aggressiveness, which was more intense in their own territory than that observed in a neutral situation. The males built nests, irrespective of female presence. All the behavioural patterns were in accordance with those previously described for one parental species, the Nile tilapia, O. <span class="hlt">niloticus</span>. PMID:18278323</p> <div class="credits"> <p class="dwt_author">Medeiros, A P T; Chellappa, S; Yamamoto, M E</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">193</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2004/2173-2176.pdf"> <span id="translatedtitle">Apparent Digestibility Coefficients of Protein in Selected Feedstuffs for Juvenile Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linnaeus, 1758</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Apparent Digestibility Coefficients (ADC of protein in anchovy (Engraulis encrasicolus, corn (Zea mays gluten, soybean (Glycine hispida, gammarid (Gammarus kischineffensis and crayfish (Astacus leptodactylus leptodactylus exoskeleton meals was determined for juvenile Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. In each of five trials, a reference diet was mixed with test ingredients in a 70:30 ratio to produce a series of test diets. Chromic oxide was added as a marker to the reference diet. The ADC for protein were; anchovy (90.2%, corn gluten (88.5%, soybean (87.6%, gammarid (76.3% and crayfish exoskeleton (70.9% meals (p<0.05 for each case, except for anchovy, corn gluten and soybean meals. The results of the study indicated that O. <span class="hlt">niloticus</span> may efficiently utilise gammarid and crayfish exoskeleton meals as dietary protein source, like anchovy, corn gluten and soybean meals.</p> <div class="credits"> <p class="dwt_author">Kenan Koprucu</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">194</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/17943223"> <span id="translatedtitle">The effect of some selected pesticides on the growth and reproduction of fresh water <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, Chrysicthys nigrodigitatus and Clarias gariepinus.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Studies were carried out to determine the toxicity of some selected pesticides on fresh water <span class="hlt">fish</span> in a tropical environment. The uptake of the pesticides lindane, pentachlorophenol (PCP), and propoxur, which are frequently used on farms, and in industries as well as by loggers and timber men on wood were studied in concrete ponds at the University of Cape Coast, in Ghana. The <span class="hlt">fish</span> used for the study were <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, Clarias gariepinus, and Chrysicthys nigrodigitatus. They were obtained from cultured ponds in the Cape Coast and Mankessim districts in the Central Region and Weija Dam, in the Greater Accra region of Ghana. Single high lethal concentration (SD) or acute treatment and cumulative/chronic (or multiple minor) lethal concentration (CD) treatment were employed in administering the pesticides to the <span class="hlt">fish</span> via water. Gas chromatograph electron capture detector analysis was done on the dead <span class="hlt">fish</span> to see the extent of ingestion. The LC(50 )values obtained for lindane on the three <span class="hlt">fish</span> samples were as follows: Chrysicthys - 0.38 mg L(-1); <span class="hlt">Oreochromis</span> - 0.42 mg L(-1), and Clarias - 1.2 mg L(-1). Mortalities occurred in <span class="hlt">fish</span> within 3-5 days of application. For the PCP on Chrysicthys, <span class="hlt">Oreochromis</span>, and Clarias species the LC(50) values were 0.42, 0.32 and 0.64 mg L(-1), respectively, for over a 2- to 3-day period. For a three-time influx period of propoxur the LC(50) for Chrysicthys, <span class="hlt">Oreochromis</span>, and Clarias, were 22.0, 30.40, and 45.04 (all in mg L(-1)), respectively. The results obtained indicated that the pesticides had adverse effects on the general growth and reproduction of <span class="hlt">fish</span> as shown by gonadosomatic indices. PMID:17943223</p> <div class="credits"> <p class="dwt_author">Hanson, R; Dodoo, D K; Essumang, D K; Blay, J; Yankson, K</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">195</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::868ca4fab98b78be32942499254b0e33"> <span id="translatedtitle">Hematological parameters in Nile Tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to sub-letal concentrations of mercury</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Mercury toxicity in tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, (Linnaeus, 1758) was investigated by the hematological parameters after long-term (14 days) exposure to various Hg concentrations (0.02, 0.002, 0.0002mg/L Hg). Test groups were set up with three replicates for each concentration, plus the control group. Blood samples were collected from six individuals for each concentration at 0, 3, 7, 10 and 14 days of exposure. The hematological parameters analyzed were: total red blood cell count (RBC), ...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">196</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://journals.upd.edu.ph/index.php/sciencediliman/article/view/274"> <span id="translatedtitle">Quantitative and Qualitative Changes in the Skeletal Muscle Acetylcholinesterase Activity of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Exposed to Methylparathion</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Spectrophotometric assays and histochemical tests for acetylcholinesterase activity in the epaxial skeletal muscle of maturing <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> after in-vivo exposure to 0.10 mg/L methylparathion showed significant inhibition of the enzyme by the pesticide. The assays manifested enzyme inhibition, after 48 and 96 hours of exposure, of 43.19% and 56.62%, respectively. These results were confirmed by the occurrences of decreased sites of acetylcholinesterase activity in the muscle fibers as exhibited upon performance of histochemical tests.</p> <div class="credits"> <p class="dwt_author">Elena Catap</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">197</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::422e1d34113b38fc2cd07db2b087db10"> <span id="translatedtitle">Application of the comet assay in erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces): a methodological comparison</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The present study applied the comet assay to erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> with the aim of improving protocols to detect DNA damage in these cells, by using two distinct pHs (pH = 12.1 and pH > 13) and evaluating whether there is a correspondence between silver and ethidium bromide staining. Comets were visually examined and, the frequency of cells with and without damage was obtained, as well as the distribution of classes and scores. By using the Kruskal-Wallis test, our results rev...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">198</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______908::b180e19e19170ab51397c9433e1f7fac"> <span id="translatedtitle">Application of the comet assay in erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces): A methodological comparison</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The present study applied the comet assay to erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> with the aim of improving protocols to detect DNA damage in these cells, by using two distinct pHs (pH = 12.1 and pH > 13) and evaluating whether there is a correspondence between silver and ethidium bromide staining. Comets were visually examined and, the frequency of cells with and without damage was obtained, as well as the distribution of classes and scores. By using the Kruskal-Wallis test, our results rev...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">199</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::d3c7c1e62ffadc7473644c1e53c87bcb"> <span id="translatedtitle">Formation of ring marks in stocked tilapia juveniles (<span class="hlt">Oreochromis</span> aureus/O. <span class="hlt">niloticus</span>) (Perciformes: Cichlidae)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Lake Metztitlán was dried up completely in the spring of 1998 and refilled in August of that year. In the period September-November, two cohorts of 1.6 million juveniles of a tilapia hybrid were stocked (<span class="hlt">Oreochromis</span> aureus/O. <span class="hlt">niloticus</span>), and monitored every month for one year. Since the date of birth of these juveniles was known, the analyses focused on whether the ring marks of the scales, sagittae and opercula or the circuli of the scales could be used to age them. The ring marks of the sc...</p> <div class="credits"> <p class="dwt_author">Iban?ez, Ana L.; Romo-coronel, Marco A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">200</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23874606"> <span id="translatedtitle">Mapping and validation of the major sex-determining region in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) Using RAD sequencing.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Sex in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Nile tilapia) is principally determined by an XX/XY locus but other genetic and environmental factors also influence sex ratio. Restriction Associated DNA (RAD) sequencing was used in two families derived from crossing XY males with females from an isogenic clonal line, in order to identify Single Nucleotide Polymorphisms (SNPs) and map the sex-determining region(s). We constructed a linkage map with 3,802 SNPs, which corresponded to 3,280 informative markers, and identified a major sex-determining region on linkage group 1, explaining nearly 96% of the phenotypic variance. This sex-determining region was mapped in a 2 cM interval, corresponding to approximately 1.2 Mb in the O. <span class="hlt">niloticus</span> draft genome. In order to validate this, a diverse family (4 families; 96 individuals in total) and population (40 broodstock individuals) test panel were genotyped for five of the SNPs showing the highest association with phenotypic sex. From the expanded data set, SNPs Oni23063 and Oni28137 showed the highest association, which persisted both in the case of family and population data. Across the entire dataset all females were found to be homozygous for these two SNPs. Males were heterozygous, with the exception of five individuals in the population and two in the family dataset. These <span class="hlt">fish</span> possessed the homozygous genotype expected of females. Progeny sex ratios (over 95% females) from two of the males with the "female" genotype indicated that they were neomales (XX males). Sex reversal induced by elevated temperature during sexual differentiation also resulted in phenotypic males with the "female" genotype. This study narrows down the region containing the main sex-determining locus, and provides genetic markers tightly linked to this locus, with an association that persisted across the population. These markers will be of use in refining the production of genetically male O. <span class="hlt">niloticus</span> for aquaculture. PMID:23874606</p> <div class="credits"> <p class="dwt_author">Palaiokostas, Christos; Bekaert, Michaël; Khan, Mohd G Q; Taggart, John B; Gharbi, Karim; McAndrew, Brendan J; Penman, David J</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_9");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a style="font-weight: bold;">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_11");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">201</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24610354"> <span id="translatedtitle">Response of antioxidant system of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) following exposure to chromium and copper in differing hardness.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Tilapias (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were exposed to copper or chromium in soft water (SW) (~80 mg CaCO3/L, conductivity 1.77 mS/cm) or hard water (HW) (~320 mg CaCO3/L, conductivity 5.80 mS/cm) using 2 exposure protocols (20 ?M for 48 h and 10 ?M for 144 h). Following the exposures, antioxidant enzyme activities [superoxide dismutase (SOD); catalase (CAT); glutathione peroxidase; glutathione reductase; and glutathione S-transferase (GST)] and glutathione (GSH) levels were measured in the liver of <span class="hlt">fish</span>. SOD and CAT activities of control <span class="hlt">fish</span> kept in SW were significantly lower than control <span class="hlt">fish</span> kept in HW. However, the other antioxidant indices (glutathione metabolism) of both control <span class="hlt">fish</span> were unaffected from water hardness. Acute metal exposures did not alter the glutathione metabolism, whereas SOD activity in SW and CAT activity in both waters changed significantly. In subchronic duration, Cu exposure caused significant decreases in measured parameters, except for GST activity and GSH level. Similarly, GST activity and GSH level were unaffected from Cr exposure. This study showed that SOD and CAT were the most sensitive antioxidant indices, and that glutathione metabolism, in general, was not altered following metal exposures in different waters. PMID:24610354</p> <div class="credits"> <p class="dwt_author">Dogan, Zehra; Eroglu, Ali; Kanak, Esin G; Atli, Gülüzar; Canli, Mustafa</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">202</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.rdoapp.psu.ac.th/sjst/ejournal/journal/31-1/0125-3395-31-1-105-110.pdf"> <span id="translatedtitle">Effects of replacing fishmeal with wastes derived from local fisheries on the growth of juvenile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A feeding trial was conducted to investigate the effects of partially and totally replacing fishmeal with by-product derived from local fisheries on growth performances of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Tilapia fingerlings (average initialweight 0.38±0.05 g were fed with 5 different diet formulas composing of <span class="hlt">fish</span> meal protein replacement levels of 0%, 25%,50%, 75, and 100%. Tilapia were raised in 80 x 80 x 80 cm3 hapa in an earthen pond for 8 weeks. Each treatment contained3 replications. No feeding trial was applied as negative control. The result showed that <span class="hlt">fish</span> by-product powder could substitute for fishmeal on a crude protein basis at a level of not more than 25%. As a result, feed cost can only be cut down approximately 3 US cents/kg. Specific growth rate, weight gain, survival rate and feed conversion ratio were not significantly different between the <span class="hlt">fish</span> fed with the 75% and 100% fishmeal containing diets (P>0.05. The outcome would beapplied to reduce the solid wastes from <span class="hlt">fish</span> processing and partially replace the imported fishmeal. This can also be used as guideline for farmers in small communities to produce their own tilapia feed.</p> <div class="credits"> <p class="dwt_author">Chanagun Chitmanat</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">203</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/20116455"> <span id="translatedtitle">Effects of chronic exposure to ammonia concentrations on brain monoamines and ATPases of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The effects of chronic exposure to total ammonia nitrogen (TAN) concentrations on the brain monoamines and ATPases of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings, were studied. The period of exposure was 70 consecutive days, and the initial weight of the fingerlings was 18+/-2.1g. In addition to the control, three treatment groups exposed to 2.5 (low), 5 (medium), and 10 (high) mg TANL(-)(1) concentrations were tested. The unionized ammonia nitrogen (NH(3)) levels calculated in mgL(-)(1) were 0.059, 0.185, and 0.575 in aquaria at 26 degrees C. The brain monoamines were serotonin (5-HT), dopamine (DA), and norepinephrine (NE), as well as their derivatives, 5-hydroxyindoleacetic acid (5-HIAA) and dihydroxyphenylacetic acid (DOPAC). Compared with the controls, the levels of brain monoamines and Na(+)/K(+)- and Ca(2+)-ATPase activities were not significantly altered in <span class="hlt">fish</span> exposed to low TAN concentration. However, there was a significant decrease in 5-HT, DA, and NE levels, and a significant increase in both serotonergic (5-HIAA/5-HT) and dopaminergic (DOPAC/DA) activities of <span class="hlt">fish</span> exposed to medium TAN and high TAN concentrations. The activities of brain Na(+)/K(+)- and Ca(2+)-ATPases of <span class="hlt">fish</span> exposed to medium TAN and high TAN concentrations significantly increased, while Mg(2+)-ATPase did not significantly change compared with that of the controls. The quantity of the detected alterations increased in <span class="hlt">fish</span> exposed to high TAN concentration. PMID:20116455</p> <div class="credits"> <p class="dwt_author">Hegazi, Mona M; Hasanein, Soha S</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">204</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22511408"> <span id="translatedtitle">Protective role of dietary N-acetylcysteine on the oxidative stress induced by cylindrospermopsin in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Cylindrospermopsin (CYN) is a toxin produced by various cyanobacteria species. <span class="hlt">Fish</span> can be exposed to this cyanotoxin in their natural environments and in aquaculture ponds, and toxic effects can be derived. The present study investigated the effects of dietary N-acetylcysteine (NAC) on the oxidative stress induced by pure CYN and CYN from lyophilized cells of Aphanizomenon ovalisporum in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). <span class="hlt">Fish</span> were pretreated with 0, 22, and 45 mg NAC/<span class="hlt">fish</span>/d for a week, and on day seven, they received a single dose of 200 µg/kg CYN and were killed after 24 h. Oxidative biomarkers evaluated included lipid peroxidation, protein oxidation, glutathione (GSH)/oxidized glutathione (GSSG) ratio, activity of the enzyme ?-glutamylcysteine synthetase, and activity and gene expression of glutathione-S-transferase and glutathione peroxidase. Results showed that CYN induced oxidative stress as evidenced by the increase of lipid peroxidation and protein oxidation, the decrease in GSH/GSSG, and the alteration of the enzymatic activities assayed. Moreover, exposure to cyanobacterial cells containing CYN induced higher toxic effects in comparison to pure CYN. N-acetylcysteine supplementation was effective at reducing the toxicity induced by CYN, particularly at the highest dose employed, with a recovery of some of the biomarkers assayed to basal levels. Therefore, NAC can be considered a useful chemoprotectant that reduces hepatic and renal oxidative stress in the prophylaxis and treatment of CYN-related intoxication in <span class="hlt">fish</span>. PMID:22511408</p> <div class="credits"> <p class="dwt_author">Gutiérrez-Praena, Daniel; Puerto, María; Prieto, Ana Isabel; Jos, Ángeles; Pichardo, Silvia; Vasconcelos, Vitor; Cameán, Ana M</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-07-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">205</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1462/882"> <span id="translatedtitle">Toxicidade aguda e efeitos histopatológicos do herbicida diquat na brânquia e no fígado da tilápia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> = Acute toxicity and histopathologic effects of diquat herbicide on the gill and liver of nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A concentração letal 50% e os efeitos histopatológicos do herbicida diquat para a tilápia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> foram avaliados em três experimentos. Os peixes foram expostos às concentrações de 0; 25; 30; 35; 40; 45; 50; 55; e 60 mg de diquat L-1 e a histologia da brânquia e do fígado foi avaliada nos peixes sobreviventes. A CL (I 50-96h do diquat estimada foi de 37,28 mg L-1, com limite inferior de 33,12 mg L-1 e superior de 41,44mg L-1. No tratamento com 30, 35 e 40 mg L-1, ocorreram início de fusão apical das lamelas secundárias; com 45 e 50 mg L-1 ocorreram congestão nas lamelas primárias e no tratamento com 55 mg L-1, ocorreu congestão sangüínea nas lamelas secundárias. O fígado dos peixes dos tratamentos controle, 30 e 35 mg L-1 estavam com organização cordonal dos hepatócitos. Nos tratamentos com 40 e 45 mg L-1, ocorreram hipertrofia dos hepatócitos; com 50 e 55 mg L-1 ocorreram fusão celular e presença de vacúolos. O diquat apresentoubaixo risco de intoxicação à tilápia nilótica e as alterações histopatológicas mais severas ocorreram somente nas concentrações mais elevadas.The lethal concentration of 50% (LC (I 50-96h and the histopathologic effects of diquat herbicide on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> <span class="hlt">fish</span> were evaluated in three experiments. The <span class="hlt">fishes</span> were exposed to concentrations of 0, 25, 30, 35, 40, 45, 50, 55 and 60 mg diquat L-1, and gill and liver histology were evaluated in the surviving <span class="hlt">fishes</span>. The estimated LC (I (50-96h of diquat was37.28 mg L-1, with lower limits of 33.12 mg L-1 and upper limits of 41.44 mg L-1. In the treatment with 30, 35 and 40 mg L-1, signs of apical fusion of the secondary lamellae were observed; with 45 and 50 mg L-1, congestion of the primary lamellae was observed; in thetreatment with 55 mg L-1, congestion of blood vessels on secondary lamellae took place. The livers of <span class="hlt">fishes</span> in treatments with 0, 25, 30 and 35 mg L-1 showed cordonal organization of hepatocytes. In the treatments with 40 and 45 mg L-1, hypertrophy of hepatocytes took place; with 50 and 55 mg L-1, cell fusion and the presence of vacuolesinside hepatocytes were observed. Diquat presented low risk of toxicity for nile tilapia, as the more severe histopathologic alterations occurred only in higher concentrations.</p> <div class="credits"> <p class="dwt_author">Matheus Nicolino Peixoto Henares</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">206</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://dx.doi.org/10.1051/kmae:2007001"> <span id="translatedtitle">QUALITÉ NUTRITIVE DE L’ALIMENTATION NATURELLE DU TILAPIA <span class="hlt">OREOCHROMIS</span> <span class="hlt">NILOTICUS</span> EN ÉLEVAGE EXTENSIF DANS DES ÉTANGS DE BARRAGE (CÔTE D’IVOIRE NUTRITIVE VALUE OF NATURAL FOOD OF TILAPIA <span class="hlt">OREOCHROMIS</span> <span class="hlt">NILOTICUS</span> IN EXTENSIVE AQUACULTURE RESERVOIRS (IVORY COAST</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available La composition chimique des sources alimentaires (périphyton, matières en suspension et sédiment et celle des contenus stomacaux d’<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> en élevage extensif dans deux barrages situés en zone rurale (Gueyo, Sud-Ouest de la Côte d’Ivoire ont été déterminées afin d’apprécier la qualité de la nourriture naturelle ingérée par ces poissons. Les proportions des différents constituants chimiques mesurés dans ces trois sources alimentaires laissent apparaître la part importante que représentent les matières organiques hydrolysables dans le périphyton (65 et 67 % aux barrages 1 et 2, respectivement, alors que les matières minérales constituent plus de la moitié du poids sec total des matières en suspension (59 et 63 % et de la ressource sédimentaire (76 et 63 %. Sur les deux sites, les fibres représentent moins de 15 % de ces trois ressources. Les teneurs en protéines (19 % et le ratio Protéines/Énergie (17 mg.kJ-1 observés dans la ressource périphytique sont respectivement 2 et 3 fois supérieurs aux valeurs mesurées dans les deux autres ressources. L’analyse biochimique des contenus stomacaux montre que les protéines sont présentes en très faibles proportions dans la nourriture ingérée par O. <span class="hlt">niloticus</span> (7 et 11 % dans les deux barrages. Par contre, les proportions en fibres (12 et 16 % et lipides (11 et 8 % de même que les ratios Protéines/Énergie (6 et 12 mg.kJ-1 caractérisant l’alimentation semblent répondre aux exigences de croissance chez cette espèce de tilapia. Les poids moyens des poissons en fin de cycle d’élevage traduisent la capacité d’O. <span class="hlt">niloticus</span> à présenter une croissance correcte à partir d’une alimentation pauvre en matières azotées pourvu qu’une faible densité soit appliquée dans les sites d’élevage. The chemical composition of natural food sources (periphyton, suspended solids and sediment and gut content of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in two extensive aquaculture reservoirs from a rural area (Gueyo, southwest of Ivory Coast were determined in order to assess the quality of the natural food ingested. The percentage of the chemical components in the three food sources in the two sites show an important part of hydrolysable organic matter in the periphyton (65 and 67%, even though the mineral matter represents more than half of the total dry weight of suspended solids (59 and 63% and sediment (76 and 63%. In the two sites, fibers represent less than 15% of these three resources. Protein contents (19% and Proteins/ Energy ratio (17 mg.kJ-1 in periphyton are respectively 2 and 3 times above the values measured for the two other resources. The biochemical analysis of the gut contents shows that proteins are in low percentage in the food ingested by O. <span class="hlt">niloticus</span> (7 and 11% in the two sites. On the other hand, the percentages of fibers (12 and 16% and lipids (11 and 8% as well as the Proteins/Energy ratios (6 and 12 mg.kJ-1 seem to meet the growth requirements of the studied species. The average weights of the <span class="hlt">fishes</span> at the end of the farming cycle are indicative of the ability of O. <span class="hlt">niloticus</span> to grow on a poor food context characterized by low nitrogen compounds, as long as a low density is applied in the aquaculture sites.</p> <div class="credits"> <p class="dwt_author">BLE M. C.</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">207</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300011"> <span id="translatedtitle">Antibiotic resistence of Aeromonas hydrophila isolated from Piaractus mesopotamicus (Holmberg, 1887 and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 Resistência de Aeromonas hydrophila isolada de Piaractus mesopotamicus (Holmberg, 1887 e <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 a antibióticos</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available One of the most important problems involving treatments with antibiotics against Aeromonas hydrophila isolated from <span class="hlt">fishes</span> is that antibiotic resistance develops readily. The antimicrobial activity of chemotherapeutants in isolates from pacu Piaractus mesopotamicus (Holmberg, 1887 and tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 was tested by the Kirby-Bauer disk method, over Mueller-Hinton surface agar previously inoculated with 100 µL of bacterial suspensions. After regular incubation, isolates from tilapia and pacu were uniformly resistant to amoxicillin, ampicillin, lincomycin, novobiocin, oxacillin, penicillin, and trimetoprim+sulfametoxazole. The A. hydrophila type strain presented resistance to the same antimicrobial substances and also against rifampicin; the bacterial isolate from pacu were the only strain resistant to tetracyclin. Isolates from both pacu and tilapia had intermediate reaction with erytromycin. The use of drugs in commercial <span class="hlt">fish</span> farms in Brazil can favor the development of resistant bacterial strains in native <span class="hlt">fish</span> species as already observed for exotic species, commercially produced for longer time.Um dos maiores problemas envolvendo o tratamento com antibióticos contra Aeromonas hydrophila isolada de peixes confinados é a rápida resistência ao antibiótico desenvolvida pela bactéria. A atividade antimicrobiana de quimioterapêuticos em isolados a partir de pacu Piaractus mesopotamicus (Holmberg, 1887 e tilápia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 foi verificada pelo método de difusão de antibiótico em discos de Kirby-Bauer, sobre uma superfície de Agar Mueller-Hinton previamente inoculada com 100 µL de suspensão bacteriana. Após o período de incubação, os isolados de tilápia e pacu foram uniformemente resistentes a amoxicilina, ampicilina, lincomicina, novobiocina, oxacilina, penicilina e trimetoprim+sulfametoxazol. A cepa tipo para A. hydrophila apresentou resistência às mesmas substâncias antimicrobianas e também contra a rifampicina; o isolado bacteriano de pacu foi a única linhagem resistente a tetraciclina. Isolados de pacu e tilápia apresentaram resistência intermediária frente a eritromicina. O uso de medicamentos em pisciculturas comerciais no Brasil pode favorecer o desenvolvimento de linhagens bacterianas resistentes em espécies de peixes nativos, como já observado em espécies exóticas comercialmente produzidas há mais tempo.</p> <div class="credits"> <p class="dwt_author">Andréa Belém-Costa</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">208</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od______1326::2c810968fbf8fa20e22cd97a57d5884f"> <span id="translatedtitle">Evaluación preliminar de las poblaciones bacterianas asociadas al tracto intestinal de la tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) expuesta a aceites esenciales de orégano en la dieta</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Núñez De La Rosa, Melisa Giset (2011) Evaluación preliminar de las poblaciones bacterianas asociadas al tracto intestinal de la tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) expuesta a aceites esenciales de orégano en la dieta. Maestría thesis, Universidad Nacional de Colombia.</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">209</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22554573"> <span id="translatedtitle">The effect of mistletoe, Viscum album coloratum, extract on innate immune response of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The purpose of the present study was to evaluate the effect of dietary mistletoe extracts on non-specific immune response and disease resistance of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) against Aeromonas hydrophila infection. Tilapia fingerlings were fed with a diet containing 0 mg as a control, 10 mg, 50 mg, and 200 mg mistletoe powder kg(-1) dry diet for 80 days. The immunological parameters, respiratory burst activity, lysozyme activity, alternative complement haemolysis activity (ACH(50)), and phagocytic activity of <span class="hlt">fish</span> were investigated following 20, 40 and 80 days of feeding. <span class="hlt">Fish</span> were challenged with A. hydrophila on 80 days after feeding and mortalities were checked over 10 days post-infection. The results show that <span class="hlt">fish</span> fed with mistletoe extract exhibited an increase in activity in all immunological parameters (P < 0.05) compared to the control group depending on feeding periods and doses of mistletoe. Following challenge with A. hydrophila, 42% less survivability was observed in the control group than in other experimental diet groups. The highest survival rate (83%) was shown in the group fed with a 50 mg mistletoe kg(-1) diet. The results suggest that mistletoe enables tilapia to promote immunity and be more resistant to A. hydrophila infection. PMID:22554573</p> <div class="credits"> <p class="dwt_author">Park, Kwan-Ha; Choi, Sang-Hoon</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">210</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://ribarstvo.agr.hr/articles/75146_UPOTREBA_SJEMENA_FERMENTIRANOG_MANGA_(Mangifera_indica_U_HRANIDBI_MLA_I_TILAPIJE_(Oreochromis_niloticus__hr.pdf"> <span id="translatedtitle">EVALUATION OF FERMENTED MANGO (Mangifera indica SEED MEAL IN THE PRACTICAL DIET OF NILE TILAPIA, (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> FINGERLINGS</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available This study evaluated the use of fermented mango (Mangifera indica seed meal (FMS to substitute yellow maize in the practical diet for Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings (4.76±0.32 g. Five iso-nitrogeneous (35% crude protein and approximately iso-energetic (3400 ME Kcal/kg dietsin which yellow maize was replaced by FMSat 0% (FMS0/Control diet, 25% (FMS25, 50% (FMS50, 75% (FMS75 and 100% (FMS100 levels were formulated. The <span class="hlt">fish</span> were fed on the diets at 5% body weight for 84 days. Alkaloids were highest (2.32% among the anti-nutritional factors analyzed in FMS, while oxalate (0.84% was lowest. Potassium was highest (8.91 mg/g among the minerals, while copper was lowest (0.01 mg/g. Weight gain, specific growth rate and feed conversion ratio were similar (p>0.05 in <span class="hlt">fish</span> fed diets FMS0 and FMS50. The <span class="hlt">fish</span> fed diet FMS0 had the highest protein efficiency ratio (1.88. Protein digestibility decreased (p<0.05 as dietary FMS increased, while carbohydrate digestibility gave an inverse relationship. Results obtained show that FMS could replace yellow maize at 50% level without affecting growth, nutrient utilization and apparent protein digestibility in diets for Nile tilapia fingerlings.</p> <div class="credits"> <p class="dwt_author">Samuel Olubodun Obasa</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">211</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24925761"> <span id="translatedtitle">Immunostimulatory effects of artificial feed supplemented with a Chinese herbal mixture on <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> against Aeromonas hydrophila.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The effects of a Chinese herbal mixture (CHM) composed of astragalus, angelica, hawthorn, Licorice root and honeysuckle on immune responses and disease resistant of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> GIFT strain) were investigated in present study. <span class="hlt">Fish</span> were fed diets containing 0 (control), 0.5%, 1.0%, 1.5% or 2.0% CHM (w/w) for 4 weeks. And series of immune parameters including lysozyme, cytokine genes TNF-? and IL-1?, superoxide dismutase (SOD), peroxidase (POD), malondialdehyde (MDA) were measured during test period. After four weeks of feeding, <span class="hlt">fish</span> were infected with Aeromonas hydrophila and mortalities were recorded. Results of this study showed that feeding Nile tilapia with CHM-supplementation diet stimulated lysozyme activity, SOD activity and POD activity in serum, induced TNF-? and IL-1? mRNA expression in head kidney and spleen, but decreased serum MDA content. All CHM-supplemental groups showed reduced mortalities following A. hydrophila infection compared with the group fed the control diet. These results suggested that this CHM can be applied as a tilapia feed supplement to elevate <span class="hlt">fish</span> immunity and disease resistance against A. hydrophila. PMID:24925761</p> <div class="credits"> <p class="dwt_author">Tang, Jufen; Cai, Jia; Liu, Ran; Wang, Jiamin; Lu, Yishan; Wu, Zaohe; Jian, Jichang</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">212</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/21695509"> <span id="translatedtitle">Acute effects of pure cylindrospermopsin on the activity and transcription of antioxidant enzymes in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) exposed by gavage.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The cyanobacterial toxin cylindrospermopsin (CYN) is a widely distributed contaminant of freshwater systems with the consequent risk for human and wildlife, particularly <span class="hlt">fish</span>. However, CYN toxicity data on <span class="hlt">fish</span> are still scarce. It is known that CYN inhibits glutathione synthesis and this could contribute to oxidative damage. In the present work tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were exposed by gavage to 200 and 400 ?g/kg bw of pure CYN and sacrificed after 24 h. The activity and relative mRNA expression by real-time PCR of antioxidant enzymes glutathione peroxidase (GPx) and soluble glutathione-S-transferases (sGST) and the sGST protein abundance by Western blot analysis were evaluated in liver and kidney. Also the induction of lipid peroxidation (LPO) was assayed. Results show an increase of LPO products in both organs. Moreover, CYN altered the activity, gene expression and protein abundance of the enzymes, indicating the importance of GPx and sGST in CYN pathogenicity. This is the first time that CYN is reported to affect these enzymes in <span class="hlt">fish</span> and they have shown to be responsive biomarkers of CYN toxicity. PMID:21695509</p> <div class="credits"> <p class="dwt_author">Puerto, María; Jos, Angeles; Pichardo, Silvia; Gutiérrez-Praena, Daniel; Cameán, Ana M</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">213</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/download/9971/pdf"> <span id="translatedtitle">Ontogenetic diet shifts of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Tilapia rendalli of the Barra Bonita reservoir (Tietê river, São Paulo State, Brazil=Mudanças ontogenéticas na dieta de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Tilapia rendalli da represa de Barra Bonita (rio Tietê, Estado de São Paulo, Brasil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, and the Congo Tilapia, Tilapia rendalli, are important members of the African cichlids, and have been introduced to many Brazilian lakes and reservoirs. These species exhibit a large feeding flexibility and may modify their habits during their growth. In the Barra Bonita reservoir, these species are well adapted, representing more than 80% of <span class="hlt">fish</span>. This study aimed to analyze ontogenetic variation with regard to the diet of these species in this important reservoir. Samples were taken monthly, from March 2007 to February 2008, in Anhembi, São Paulo State. Both species were analyzed by grouping individuals according to size classes. The coexistence of these species was observed in this environment, to which <span class="hlt">fish</span> were introduced, as well as discreet differences in diet, being that <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was considered as an detritivorous, since the detritus was constant in the diet of almost all size classes, and presents some changes in its diet according to the different size classes. While T. rendalli may was defined as herbivorous, and the contribution of food resources to the diet of T. rendalli seems to be different from that of O. <span class="hlt">niloticus</span> along the size classes.A Tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, e a Tilapia do Congo, Tilapia rendalli, são importantes membros do grupo dos ciclídeos africanos, e têm sido introduzidas em diversos lagos e reservatórios brasileiros. Estas espécies exibem uma grande flexibilidade em suas dietas e podem modificar seus hábitos alimentares durante o crescimento. No reservatório de Barra Bonita, estas espécies estão bem adaptadas, representando mais de 80% da pesca. Este estudo teve como objetivo analisar a variação ontogenética na dieta destas duas espécies neste importante reservatório. Foram realizadas amostras mensais, de Março de 2007 a Fevereiro de 2008, no município de Anhembi, Estado de São Paulo. Ambas as espécies foram analisadas agrupando os indivíduos de acordo com a classe de tamanho. Foi possível observar a coexistência e uma discreta diferença na dieta das duas espécies neste ambiente, sendo que <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> foi considerada como detritívora, pois o detrito foi constante na dieta na maioria das classes de tamanho e apresentou algumas mudanças na dieta nas diferentes classes de tamanho. Já T. rendalli foi considerada herbívora, e houve diferença quanto à contribuição dos recursos alimentares na dieta ao longo das classes de tamanho comparando as duas espécies.</p> <div class="credits"> <p class="dwt_author">Edmir Daniel Carvalho</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">214</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______642::957ab42e52c68ae692089fb5b17e6370"> <span id="translatedtitle">Trophic interrelationships between the exotic Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and indigenous tilapiine cichlids in a subtropical African river system (Limpopo River, South Africa)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The stable isotope ratio and seasonal changes in diet of two indigenous (<span class="hlt">Oreochromis</span> mossambicus, Tilapia rendalli) and one exotic (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) tilapiine cichlids in the subtropical Limpopo River, South Africa were investigated to determine patterns of resource partitioning. Stomach contents of O. <span class="hlt">niloticus</span> and O. mossambicus indicated high dietary overlap across size class, habitat and season, with both species primarily feeding on vegetative detritus. However, stable isotope anal...</p> <div class="credits"> <p class="dwt_author">Zengeya, Tsungai Alfred; Booth, Anthony J.; Bastos, Armanda D. S.; Chimimba, Christian Timothy</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">215</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24859646"> <span id="translatedtitle">Characterization of two paralogous StAR genes in a teleost, Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Steroidogenic acute regulatory protein (StAR) transports cholesterol, the substrate for steroid synthesis, to the inner membranes of mitochondria. It is well known that estrogen is essential for female sex determination/differentiation in <span class="hlt">fish</span>. However, no reports showed that the conventional StAR, which was supposed to be essential for estrogen production, was expressed in female gonads during the critical timing of sex determination/differentiation. In this study, two different StAR isoforms, named as StAR1 and StAR2, were characterized from the gonads of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Phylogenetic and synteny analysis revealed that two StAR genes existed in teleosts, Xenopus and chicken indicating that the duplication event occurred before the divergence of teleosts and tetrapods. Real-time PCR revealed that StAR1 was dominantly expressed in the testis, head kidney and kidney; while StAR2 was expressed exclusively in the gonads. In situ hybridization and immunohistochemistry demonstrated that StAR1 was expressed in the interrenal cells of the head kidney and Leydig cells of the testis; while StAR2 was expressed in the Leydig cells of the testis and the interstitial cells of the ovary. Ontogenic analysis demonstrated that StAR2 was expressed abundantly from 5days after hatching (dah) in the somatic cells in XX gonads, whereas in XY gonads, both StARs could be detected from 30dah until adulthood. Intraperitoneal injection of human chorionic gonadotropin experiments showed that expression of StAR1 and 2 was significantly elevated at 8h and persisted until 24h after injection in the testis. Taken together, our data suggested that StAR1 is likely to be required for cortisol production in the head kidney, and StAR2 is probably involved in estrogen production during early sex differentiation in XX gonads. In contrast, both StARs might be required for androgen production in testes. For the first time, our data demonstrated that two <span class="hlt">fish</span> StARs might be involved in steroidogenesis in a tissue and developmental stage dependent manner. PMID:24859646</p> <div class="credits"> <p class="dwt_author">Yu, Xiangguo; Wu, Limin; Xie, Lang; Yang, Shijie; Charkraborty, Tapas; Shi, Hongjuan; Wang, Deshou; Zhou, Linyan</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">216</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22137346"> <span id="translatedtitle">Trials for the control of trichodinosis and gyrodactylosis in hatchery reared <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fries by using garlic.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The present work was designed to study the prevalence of trichodinosis and gyrodactylosis in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fries, and to test the therapeutic efficacy and preventive efficacy of garlic oil and crushed garlic cloves. Trichodinosis and gyrodactylosis are ectoparasitic diseases that affect most warm freshwater <span class="hlt">fish</span>, especially fries and fingerlings. In a private O. <span class="hlt">niloticus</span> <span class="hlt">fish</span> hatchery, the prevalence of trichodinosis in 5-, 15- and 30-day-old-fries was 37%, 23% and 40.5%, respectively. The highest infection intensity was detected in 30-day-old-fries. The gyrodactylosis was reported only in combination with trichodinosis. In addition, we found that its prevalence in 5-, 15- and 30-day-old-fries was 17%, 19.5% and 29%, respectively. Mortality rate of fry in the first month of life was 53% as a result of injury to these two types of parasites. The garlic oil and crushed garlic cloves were tested in both in vitro and earthen ponds of the hatchery. Using 2-, 2.5- and 3-ppt (parts per thousand) garlic oil for 4h in vitro water bath treatment resulted in 100% recovery, while 1 and 1.5 ppt garlic oil, respectively, needed 24 and 16 h to treat the infected fries. The treatment by 3 ppt garlic oil as a water bath for 1h treated the two diseases in 55% in 7 days from application in the hatchery earthen pond. In the mean time, 300 mg L(-1) crushed garlic cloves as an indefinite bath in the hatchery earthen pond eliminated 68% of the diseases. The same protocol for preventing the two diseases resulted in obtaining 65% and 75% of parasite free fries, for garlic oil and crushed garlic cloves, respectively, compared to 53% of the control fries. PMID:22137346</p> <div class="credits"> <p class="dwt_author">Abd El-Galil, Mohamed A A; Aboelhadid, Shawky M</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-04-30</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">217</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/17091506"> <span id="translatedtitle">Acute toxicity, behavioral changes, and histopathological effects of deltamethrin on tissues (gills, liver, brain, spleen, kidney, muscle, skin) of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) fingerlings.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Deltamethrin, a synthetic pyrethroid contaminating aquatic ecosystems as a potential toxic pollutant, was investigated in the present study for acute toxicity. The purpose of this study was to evaluate LC(50) values of deltamethrin on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.) fingerlings and investigate histopathological responses of <span class="hlt">fish</span> exposed to deltamethrin. The 48 h LC(50) value for Nile tilapia fingerlings was estimated as 4.85 microg/L using static test system. In addition, behavioral changes at each deltamethrin concentration were observed closely. All <span class="hlt">fish</span>, exposed to 5 microg/L deltamethrin revealed severe morphological alterations in the gills and liver. In the gills hyperemia, fusion of secondary lamellae and telangiectasis were observed; whereas hydropic degenerations in liver were observed in all examined <span class="hlt">fish</span>. The results are significant for reporting acute deltamethrin toxicity in terms of behavioral and histopathological changes: Deltamethrin is highly toxic to fingerlings. PMID:17091506</p> <div class="credits"> <p class="dwt_author">Yildirim, M Ziynet; Benli, A Ca?lan Karasu; Selvi, Mahmut; Ozkul, Ayhan; Erkoç, Figen; Koçak, Oner</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">218</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://ejournal.litbang.depkes.go.id/index.php/MPK/article/view/1014"> <span id="translatedtitle">EFEKTIVITAS IKAN NILA MERAH (<span class="hlt">OREOCHROMIS</span> <span class="hlt">NILOTICUS</span> SEBAGAI PEMAKAN JENTIK NYAMUK</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Ikan nila merah (Oreachromis <span class="hlt">niloticus</span> merupakan ikan yang berasal dari luar negeri yang sudah dibudidayakan secara meluas di Indonesia. Ikan tersebut mempunyai arti ekonomis penting karena harganya mahal. Dalam percobaan laboratorium, ikan nila merah memakan jentik nyamuk dan ganggang Enteromorpha, yaitu ganggang yang dipakai untuk bertelur nyamuk Anopheles sundaicus. Dalam suatu percobaan, efektivitas ikan nila merah sebagai agen biologi untuk mengendalikan jentik nyamuk vektor malaria, telah dilakukan dengan membuat kolam-kolam percobaan sebanyak 12 kolam yang diisi dengan, ikan nila merah, ikan nila merah, dan ikan nila merah dan ikan mas, serta kolam kosong sebagai kontrol. Hasilnya menunjukkan bahwa dalam kolam yang diisi dengan ikan nila merah dan ikan mas jentik nyamuknya lebih sedikit. Hal ini berbeda nyata dengan kolam yang diisi ikan mas saja dan kolam kontrol.</p> <div class="credits"> <p class="dwt_author">M. Sudomo</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">219</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000500008"> <span id="translatedtitle">Effect of cortisol on some osmoregulatory parameters of the teleost, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., after transference from freshwater to seawater Efeito do cortisol sobre parâmetros de osmorregulação do teleósteo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., após a transferência de água doce para água salgada</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available This trial was conducted in order to determine the effects of cortisol on salt water acclimation of tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.. Tilapia (n=42 were injected intraperitoneally with cortisol and then were directly transferred from freshwater (FW to 15‰ salt water (SW. Changes in plasma osmolality, chloride ion concentration (Cl-, plasma level of cortisol and gill Na+, K+-ATPase activity were measured at 6, 12, 24, 48, 72 and 168 hours after transference to 15‰ SW. Plasma osmolality and Cl- increased immediately after transference until 12-24 h. The <span class="hlt">fish</span> injected with cortisol (F showed higher plasma levels of cortisol than those from control group (C that maintained the initial levels during the experiment. Gill Na+, K+-ATPase activity of C <span class="hlt">fish</span> began to increase at first hours after transference and peak at 48h. The differences between gill Na+, K+-ATPase activity of F and C groups were significant (PEste estudo foi realizado com o objectivo de testar os efeitos do cortisol na aclimatação da tilápia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. à água salgada. As tilápias (n=42 foram injectadas intraperitonealmente com cortisol e directamente transferidas de água doce para água salobra (15‰. As alterações da osmolaridade, concentração em cloretos (Cl-, os níveis plasmáticos de cortisol e a actividade branquial da Na+, K+-ATPase foram medidas (6, 12, 24, 48, 72 e 168 horas após a transferência para água salobra. A osmolaridade e a concentração em Cl- aumentou imediatamente após a transferência até às 12-24h. O grupo injectado com cortisol (F mostrou níveis plasmáticos de cortisol mais elevados do que o grupo controlo (C que manteve os níveis iniciais durante a experiência. A actividade branquial da Na+, K+-ATPase dos peixes do grupo C começou às primeiras horas após a transferência e teve um pico às 48h. As diferenças entre a actividade enzimática da Na+, K+-ATPase dos grupos F e C foram significativas (P<0,05 em água doce, o que confirma o efeito exógeno do cortisol.</p> <div class="credits"> <p class="dwt_author">A. Fontaínhas-Fernandes</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-10-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">220</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23589025"> <span id="translatedtitle">Protective effect of hydroferrate fluid, MRN-100, against lethality and hematopoietic tissue damage in ?-radiated Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Hydroferrate fluid, MRN-100, an iron-based compound derived from bivalent and trivalent ferrates, is a potent antioxidant compound. Therefore, we examined the protective effect of MRN-100 against ?-radiation-induced lethality and damage to hematopoietic tissues in <span class="hlt">fish</span>. A total of 216 Nile tilapia <span class="hlt">fish</span> (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were randomly divided into four groups. Group 1 served as a control that was administered no radiation and no MRN-100 treatment. Group 2 was exposed only to ?-radiation (15 Gy). Groups 3 and 4 were pre-treated with MRN-100 at doses of either 1 ml/l or 3 ml/l in water for 1 week, and subsequently exposed to radiation while continuing to receive MRN-100 for 27 days. The survival rate was measured, and biochemical and histopathological analyses of hematopoietic tissues were performed for the different treatment groups at 1 and 4 weeks post-radiation. Exposure to radiation reduced the survival rate to 27.7%, while treatment with MRN-100 maintained the survival rate at 87.2%. In addition, <span class="hlt">fish</span> exposed to ?-radiation for 1 week showed a significant decrease in the total number of white blood cells (WBCs) and red blood cells (RBCs) series. However, treatment with MRN-100 protected the total WBC count and the RBCs series when compared with irradiated <span class="hlt">fish</span>. Furthermore, significant histological lesions were observed in the hepatopancreas, spleen and gills of irradiated <span class="hlt">fish</span>. However, treatment with MRN-100 protected the histopathology of various organs. We conclude that MRN-100 is a radioprotective agent in <span class="hlt">fish</span> and may be useful as an adjuvant treatment to counteract the adverse side effects associated with radiation exposure. PMID:23589025</p> <div class="credits"> <p class="dwt_author">Ghoneum, Mamdooh; Elbaghdady, Heba Allah M; El-Shebly, Abdallah A; Pan, Deyu; Assanah, Edward; Lawson, Greg</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_10");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a style="font-weight: bold;">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_12");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">221</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:45012042"> <span id="translatedtitle">Protective effect of hydroferrate fluid, MRN-100, against lethality and hematopoietic tissue damage in ?-radiated Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">Hydroferrate fluid, MRN-100, an iron-based compound derived from bivalent and trivalent ferrates, is a potent antioxidant compound. Therefore, we examined the protective effect of MRN-100 against ?-radiation-induced lethality and damage to hematopoietic tissues in <span class="hlt">fish</span>. A total of 216 Nile tilapia <span class="hlt">fish</span> (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were randomly divided into four groups. Group 1 served as a control that was administered no radiation and no MRN-100 treatment. Group 2 was exposed only to ?-radiation (15 Gy). Groups 3 and 4 were pre-treated with MRN-100 at doses of either 1 ml/l or 3 ml/l in water for 1 week, and subsequently exposed to radiation while continuing to receive MRN-100 for 27 days. The survival rate was measured, and biochemical and histopathological analyses of hematopoietic tissues were performed for the different treatment groups at 1 and 4 weeks post-radiation. Exposure to radiation reduced the survival rate to 27.7%, while treatment with MRN-100 maintained the survival rate at 87.2%. In addition, <span class="hlt">fish</span> exposed to ?-radiation for 1 week showed a significant decrease in the total number of white blood cells (WBCs) and red blood cells (RBCs) series. However, treatment with MRN-100 protected the total WBC count and the RBCs series when compared with irradiated <span class="hlt">fish</span>. Furthermore, significant histological lesions were observed in the hepatopancreas, spleen and gills of irradiated <span class="hlt">fish</span>. However, treatment with MRN-100 protected the histopathology of various organs. We conclude that MRN-100 is a radioprotective agent in <span class="hlt">fish</span> and may be useful as an adjuvant treatment to counteract the adverse side effects associated with radiation exposure. (author)</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">222</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23072785"> <span id="translatedtitle">Cyanobacterium producing cylindrospermopsin cause oxidative stress at environmentally relevant concentrations in sub-chronically exposed tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Cylindrospermopsin (CYN) is a potent cyanobacterial cytotoxin produced by certain freshwater cyanobacteria. Structurally, it is an alkaloid with a tricyclic guanidine moiety combined with hydroxymethyluracil. It has proved to be a potent inhibitor of protein synthesis, and to deplete hepatic glutathione. Recently, some studies have shown that CYN produces changes in some oxidative stress biomarkers in <span class="hlt">fish</span> acutely exposed to pure CYN by oral and intraperitoneal (i.p.) routes. In the present study tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were exposed by immersion to lyophilized Aphanizomenon ovalisporum cells added to the aquaria using two concentration levels, 10 or 100 ?g CYN L(-1), during two different exposure times: 7 and 14 d. <span class="hlt">Fish</span> were sacrificed and liver and kidney were extracted. The oxidative status of <span class="hlt">fish</span> was evaluated by analyzing in both organs the following biomarkers: lipid peroxidation (LPO), protein oxidation, DNA oxidation, reduced-oxidized glutathione ratio (GSH/GSSG), and changes in the activity of Glutathione-S-transferase (GST), Glutathione Peroxidase (GPx), Superoxide dismutase (SOD), Catalase (CAT), and ?-Glutamyl-cysteine synthetase (GCS). In general, major changes were observed in tilapia treated with 100 ?g CYN L(-1) after 14 d of exposure. However, some endpoints were altered at the lowest concentration assayed only after 7d of exposure, such as DNA oxidation and ?-GCS in kidney, and CAT and GSH/GSSG decrease in the liver and kidney. The kidney was the most affected organ. These findings confirm that the oxidative stress play a role in the pathogenicity induced by CYN in this <span class="hlt">fish</span> species, and the results obtained could be useful for future ecotoxicological risks assessment studies, for the protection of <span class="hlt">fish</span> and aquatic ecosystems. To our knowledge this is the first study dealing with the oxidative stress changes induced by cyanobacterial cells containing CYN and its derivative deoxy-CYN on <span class="hlt">fish</span> exposed sub-chronically under laboratory conditions. PMID:23072785</p> <div class="credits"> <p class="dwt_author">Guzmán-Guillén, R; Prieto, A I; Vasconcelos, V M; Cameán, A M</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">223</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/jbs/2013/559-562.pdf"> <span id="translatedtitle">Effect of Fermented Kitchen Waste on Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Growth Performance and Water Quality as a Water Additive</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Aquaculture contributes about 20% of domestic <span class="hlt">fish</span> production in Malaysia. Tilapia has been identified as one of the main species for freshwater aquaculture in the Third National Agriculture Policy (DPN3. However, feed cost and water quality management remain as two major challenges to the industry. This study aim to analyse the effects of Fermented Kitchen Waste (FKW as water additives on water quality and growth performance of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Different concentration (0.05, 0.1 and 0.2% of FKW were used to treat tilapia in tank culture for a period of twelve weeks. Physico-chemical parameters were also taken every week. Treatment with 0.1% FKW resulted in significant (p<0.05 decrease in ammonia, nitrite and nitrate levels. The survival rates of tilapia treated with 0.05 and 0.1% FKW were comparable to the untreated control. Growth performance of the tilapia was measured in term of length and weight. Highest relative growth rate was observed in tilapia treated with 0.05% FKW. However, all the <span class="hlt">fish</span> died in 0.2% FKW due to severe pH drop. Therefore, low concentration of FKW could severe as a potential water additive to improve water quality and promote growth in tilapia aquaculture.</p> <div class="credits"> <p class="dwt_author">S.K. Wong</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">224</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23134104"> <span id="translatedtitle">Efficacy of florfenicol for control of mortality associated with Francisella noatunensis subsp. orientalis in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Francisella noatunensis subsp. orientalis (Fno) (syn. F. asiatica) is an emergent Gram-negative facultative intracellular bacterium. Although it is considered one of the most pathogenic bacteria in <span class="hlt">fish</span>, there are no commercially available treatments or vaccines. The objective of this project was to determine the most efficacious concentration of florfenicol (FFC) [10, 15 or 20 mg FFC kg(-1) body weight (bw) per days for 10 days] administered in feed to control experimentally induced infections of Fno in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.), reared in a recirculating aquaculture system. The cumulative mortality of <span class="hlt">fish</span> that received 0, 10, 15 or 20 mg FFC kg(-1)  bw per day was 60, 37, 14 and 16%, respectively. Francisella noatunensis subsp. orientalis genome equivalents were detected in water from all challenged groups with slight reduction in the concentration in the florfenicol-treated groups 4 days after treatment. The mean LOG of CFU Fno mg(-1) spleen was 3-5 and was present in all challenged groups at necropsy 11 days after treatment (21 days after challenge). Results show that florfenicol administered at doses of 15 and 20 mg FFC kg(-1)  bw per days for 10 days significantly reduced mortality associated with francisellosis in Nile tilapia. PMID:23134104</p> <div class="credits"> <p class="dwt_author">Soto, E; Kidd, S; Gaunt, P S; Endris, R</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">225</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______642::e7e188e94dc6141d0a16dd783310034f"> <span id="translatedtitle">Ecological niche modeling of the invasive potential of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in African river systems : concerns and implications for the conservation of <span class="hlt">Oreochromis</span> species</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">This study applied ecological niche models to determine the potential invasive range of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, with a particular focus on river systems in southern Africa where it is now established and spreading. Computational tools such as niche models are useful in predicting the potential range of invasive species, but there are limitations to their application. In particular, models trained on native records may fail to predict the full extent of an invasion. This failure i...</p> <div class="credits"> <p class="dwt_author">Zengeya, Tsungai Alfred; Robertson, Mark P.; Booth, Anthony J.; Chimimba, Christian Timothy</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">226</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::31fd4faa2c76814bd69e4e47299ee811"> <span id="translatedtitle">Metallic Micropollutants in the Harvest of <i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> </i>(Linnaeus, 1757)from Polluted Waters: Wildlife and Human Concerns</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were sampled at four locations along Lake Mary?t for eleven metal residues. Data were compared to certified levels for possible metal contamination. Generally, cadmium, lead, mercury, manganese and copper were above standard levels for unpolluted waters. The kidneys in O. <span class="hlt">niloticus</span> were the principal store organs for most of the metals tested. In an outstanding result, the muscular edible tissue in O. <span class="hlt">niloticus</span> was the principal dest...</p> <div class="credits"> <p class="dwt_author">Adham, K. G.</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">227</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2871142&rendertype=abstract"> <span id="translatedtitle">Functionality and Antioxidant Properties of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) as Influenced by the Degree of Hydrolysis</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Freeze dried protein powders (Fresh minced meat, FMM and Hot water dip, HWD) from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were hydrolyzed by Alcalase 2.4 L (Alc), Flavourzyme (Flav) and Neutrase (Neut), and investigated for antioxidant activity and their functional properties. FMM and HWD hydrolysed by Alc, exhibiting superior antioxidant activity, had estimated degrees of hydrolysis (DH) of 23.40% and 25.43%, respectively. The maximum values of the 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), 3-(2-pyridyl) 5,6-bis(4-phenyl-sulphonic acid)-1,2,4-triazine (ferrozine), radical scavenging activities and metal chelating properties were 86.67%, 91.27% and 82.57%, and 84.67%, 92.60% and 78.00% for FMM and HWD, respectively, with a significant difference (P 8,000 Da. At pH 2, FMM and HWD hydrolysates have varying solubilities above 85% (Alc FMM; 91.33%, Flav FMM; 79.5%, Neut FMM; 83.8% and Alc HWD; 90.45%, Flav HWD; 83.5%, and Neut HWD; 85.8%). They have ‘U’ shaped solubility curves, water holding capacity was in the range of 2.77 and 1.77 mL/g, while oil holding capacity ranged between 3.13 and 2.23 mL/g. FMM and HWD have the highest bulk density of 0.53 and 0.53 for Neutrase and Alcalase 2.4 L, respectively. Foam capacity and stability ranged from 125.5 to 61.4, 138.5 to 45.2, 130.0 to 62.5, and 124.5 to 55.0, 137.5 to 53.3, 129.6 to 62.7 for FMM and HWD hydrolyzed with Alcalase 2.4 L, Flavourzyme and Neutrase, respectively. Tilapia <span class="hlt">fish</span> protein hydrolysates are thus potential functional food ingredients.</p> <div class="credits"> <p class="dwt_author">Foh, Mohamed Beva Kelfala; Amadou, Issoufou; Foh, Betty Mabel; Kamara, Mohamed Tabita; Xia, Wenshui</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">228</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.mdpi.com/1422-0067/11/4/1851/"> <span id="translatedtitle">Functionality and Antioxidant Properties of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> as Influenced by the Degree of Hydrolysis</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Freeze dried protein powders (Fresh minced meat, FMM and Hot water dip, HWD from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were hydrolyzed by Alcalase 2.4 L (Alc, Flavourzyme (Flav and Neutrase (Neut, and investigated for antioxidant activity and their functional properties. FMM and HWD hydrolysed by Alc, exhibiting superior antioxidant activity, had estimated degrees of hydrolysis (DH of 23.40% and 25.43%, respectively. The maximum values of the 1,1-diphenyl-2-picrylhydrazyl (DPPH, 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid diammonium salt (ABTS, 3-(2-pyridyl 5,6-bis(4-phenyl-sulphonic acid-1,2,4-triazine (ferrozine, radical scavenging activities and metal chelating properties were 86.67%, 91.27% and 82.57%, and 84.67%, 92.60% and 78.00% for FMM and HWD, respectively, with a significant difference (P < 0.05 between the samples. Essential amino acids were above the amounts recommended by the Food and Agricultural Organization/World Health Organization (FAO/WHO/UNU for humans. Lower molecular weight sizes 8,000 Da. At pH 2, FMM and HWD hydrolysates have varying solubilities above 85% (Alc FMM; 91.33%, Flav FMM; 79.5%, Neut FMM; 83.8% and Alc HWD; 90.45%, Flav HWD; 83.5%, and Neut HWD; 85.8%. They have ‘U’ shaped solubility curves, water holding capacity was in the range of 2.77 and 1.77 mL/g, while oil holding capacity ranged between 3.13 and 2.23 mL/g. FMM and HWD have the highest bulk density of 0.53 and 0.53 for Neutrase and Alcalase 2.4 L, respectively. Foam capacity and stability ranged from 125.5 to 61.4, 138.5 to 45.2, 130.0 to 62.5, and 124.5 to 55.0, 137.5 to 53.3, 129.6 to 62.7 for FMM and HWD hydrolyzed with Alcalase 2.4 L, Flavourzyme and Neutrase, respectively. Tilapia <span class="hlt">fish</span> protein hydrolysates are thus potential functional food ingredients.</p> <div class="credits"> <p class="dwt_author">Mohamed Tabita Kamara</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-04-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">229</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400007"> <span id="translatedtitle">Hematological parameters in Nile Tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to sub-letal concentrations of mercury</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Mercury toxicity in tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, (Linnaeus, 1758 was investigated by the hematological parameters after long-term (14 days exposure to various Hg concentrations (0.02, 0.002, 0.0002mg/L Hg. Test groups were set up with three replicates for each concentration, plus the control group. Blood samples were collected from six individuals for each concentration at 0, 3, 7, 10 and 14 days of exposure. The hematological parameters analyzed were: total red blood cell count (RBC, hemoglobin concentration (Hb, hematocrit (Ht, mean corpuscular volume (MCV, mean corpuscular hemoglobin (MCH, mean corpuscular hemoglobin concentration (MCHC, total white blood cell count (WBC and differential leukocyte counts and total thrombocyte count (Tr. There were no significant differences among the mean hematological values at the different Hg concentrations indicating that Hg at the concentrations studied was not toxic to tilapia.A toxicidade do mercúrio foi avaliada em tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaues, 1758 através da análise dos parâmetros hematológicos após exposição a diferentes concentrações sub-letais, durante um período de 14 dias. O bioensaio foi conduzido no laboratório de toxicologia do Instituto de Pesca, SP. Foram utilizados alevinos (12.44 ± 0.84 cm, e 27.13 ± 4.67 g e aquários com capacidade para 50 litros e preenchidos com água declorada e mais a quantidade de solução de mercúrio (HgCl2 correspondendo as seguintes concentrações: 0,02; 0,002; 0.0002 mg.L-1 Hg. Foram utilizadas 3 repetições de cada concentração e grupo controle. Amostras de sangue foram coletadas de seis animais de cada concentração nos tempos 0, 3, 7, 10 e 14 dias de exposição. Foram avaliados: a contagem de eritrócitos (RBC, concentração de hemoglobina (Hb, hematócrito (Ht, volume corpuscular médio (VCM, hemoglobina corpuscular média (HCM e concentração de hemoglobina corpuscular média (CHCM, trombócitos totais (Tr, contagem diferencial e total de leucócitos (Lc. Os resultados demonstram que as concentrações de Hg testadas, não alteraram significativamente os parâmetros hematológicos, permitindo concluir que a quantidade de Hg na água não foram suficientes para afetar o quadro hematológico de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Nilton Massuo Ishikawa</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">230</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400007&lang=en"> <span id="translatedtitle">Hematological parameters in Nile Tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> exposed to sub-letal concentrations of mercury</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese A toxicidade do mercúrio foi avaliada em tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaues, 1758) através da análise dos parâmetros hematológicos após exposição a diferentes concentrações sub-letais, durante um período de 14 dias. O bioensaio foi conduzido no laboratório de toxicologia do Instituto de Pesca, [...] SP. Foram utilizados alevinos (12.44 ± 0.84 cm, e 27.13 ± 4.67 g) e aquários com capacidade para 50 litros e preenchidos com água declorada e mais a quantidade de solução de mercúrio (HgCl2) correspondendo as seguintes concentrações: 0,02; 0,002; 0.0002 mg.L-1 Hg. Foram utilizadas 3 repetições de cada concentração e grupo controle. Amostras de sangue foram coletadas de seis animais de cada concentração nos tempos 0, 3, 7, 10 e 14 dias de exposição. Foram avaliados: a contagem de eritrócitos (RBC), concentração de hemoglobina (Hb), hematócrito (Ht), volume corpuscular médio (VCM), hemoglobina corpuscular média (HCM) e concentração de hemoglobina corpuscular média (CHCM), trombócitos totais (Tr), contagem diferencial e total de leucócitos (Lc). Os resultados demonstram que as concentrações de Hg testadas, não alteraram significativamente os parâmetros hematológicos, permitindo concluir que a quantidade de Hg na água não foram suficientes para afetar o quadro hematológico de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Abstract in english Mercury toxicity in tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, (Linnaeus, 1758) was investigated by the hematological parameters after long-term (14 days) exposure to various Hg concentrations (0.02, 0.002, 0.0002mg/L Hg). Test groups were set up with three replicates for each concentration, plus the control g [...] roup. Blood samples were collected from six individuals for each concentration at 0, 3, 7, 10 and 14 days of exposure. The hematological parameters analyzed were: total red blood cell count (RBC), hemoglobin concentration (Hb), hematocrit (Ht), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), total white blood cell count (WBC) and differential leukocyte counts and total thrombocyte count (Tr). There were no significant differences among the mean hematological values at the different Hg concentrations indicating that Hg at the concentrations studied was not toxic to tilapia.</p> <div class="credits"> <p class="dwt_author">Nilton Massuo, Ishikawa; Maria José Tavares, Ranzani-Paiva; Julio Vicente, Lombardi; Cláudia Maris, Ferreira.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">231</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842006000300020"> <span id="translatedtitle">Heterogeneous growth fingerlings of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: effects of density and initial size variability Crescimento heterogêneo em juvenis de Tilápia-do-Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: efeito da heterogeneidade inicial de peso e da densidade</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available In this study, the effect of initial heterogeneity of weight and density on heterogeneous growth (HetG evaluated by the coefficient of the variation of weight in the young Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> of the territorial species was tested. <span class="hlt">Fish</span> were maintained in a glass aquarium (8 and 2 L of water with two levels of initial heterogeneity of weight: low and high, under two density conditions: low and high, thus constituting four conditions (six replications for each. Initially, the weights of the animals were taken after 8, 16, 22 and 30 days (end of experiment. The results, evaluated by the non-parametric test of Kruskal- Wallis, demonstrated that in the groups where the animals were stored under high initial HetG, there was a reduction of the same and that in the groups where the animals were stored under high density, there was exacerbation or maintained high values of HetG. High density in association with high initial heterogeneity caused more exacerbation of HetG in such a way that the density appeared to be a determining factor for exacerbation or the maintenance of high values of HetG, whereas the initial heterogeneity of the weight could be a secondary factor.Neste trabalho, testou-se o efeito da heterogeneidade inicial de peso e da densidade sobre o crescimento heterogêneo (CHet, avaliado pelo coeficiente de variação do peso em juvenis de tilápia-do-Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, espécie territorial. Os peixes foram mantidos em aquários de vidro (8 e 2 L d’água com dois níveis de heterogeneidade inicial de peso: baixo e alto, sob duas densidades: baixa e alta, configurando-se quatro condições (6 réplicas cada uma. Os pesos dos animais foram tomados no início, aos 8, 16, 22 e 30 dias (final do experimento. Os resultados, avaliados pelo teste não paramétrico de Kruskal-Wallis, demonstraram que nos grupos em que os animais foram estocados com alto CHet inicial houve redução e que nos grupos em que os animais foram estocados em alta densidade houve exacerbação ou manutenção dos altos valores de CHet. A alta densidade quando associada à alta heterogeneidade inicial provocou maior exacerbação do CHet de forma que a densidade parece ser um fator determinante da exacerbação ou da manutenção de altos valores de CHet, enquanto a heterogeneidade inicial de peso pode ser um fator secundário.</p> <div class="credits"> <p class="dwt_author">J. M. Barbosa</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">232</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842006000300020&lang=en"> <span id="translatedtitle">Heterogeneous growth fingerlings of the Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: effects of density and initial size variability / Crescimento heterogêneo em juvenis de Tilápia-do-Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: efeito da heterogeneidade inicial de peso e da densidade</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Neste trabalho, testou-se o efeito da heterogeneidade inicial de peso e da densidade sobre o crescimento heterogêneo (CHet, avaliado pelo coeficiente de variação do peso) em juvenis de tilápia-do-Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, espécie territorial. Os peixes foram mantidos em aquários de vidro (8 e 2 L [...] d’água) com dois níveis de heterogeneidade inicial de peso: baixo e alto, sob duas densidades: baixa e alta, configurando-se quatro condições (6 réplicas cada uma). Os pesos dos animais foram tomados no início, aos 8, 16, 22 e 30 dias (final do experimento). Os resultados, avaliados pelo teste não paramétrico de Kruskal-Wallis, demonstraram que nos grupos em que os animais foram estocados com alto CHet inicial houve redução e que nos grupos em que os animais foram estocados em alta densidade houve exacerbação ou manutenção dos altos valores de CHet. A alta densidade quando associada à alta heterogeneidade inicial provocou maior exacerbação do CHet de forma que a densidade parece ser um fator determinante da exacerbação ou da manutenção de altos valores de CHet, enquanto a heterogeneidade inicial de peso pode ser um fator secundário. Abstract in english In this study, the effect of initial heterogeneity of weight and density on heterogeneous growth (HetG) evaluated by the coefficient of the variation of weight in the young Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> of the territorial species was tested. <span class="hlt">Fish</span> were maintained in a glass aquarium (8 and 2 L o [...] f water) with two levels of initial heterogeneity of weight: low and high, under two density conditions: low and high, thus constituting four conditions (six replications for each). Initially, the weights of the animals were taken after 8, 16, 22 and 30 days (end of experiment). The results, evaluated by the non-parametric test of Kruskal- Wallis, demonstrated that in the groups where the animals were stored under high initial HetG, there was a reduction of the same and that in the groups where the animals were stored under high density, there was exacerbation or maintained high values of HetG. High density in association with high initial heterogeneity caused more exacerbation of HetG in such a way that the density appeared to be a determining factor for exacerbation or the maintenance of high values of HetG, whereas the initial heterogeneity of the weight could be a secondary factor.</p> <div class="credits"> <p class="dwt_author">J. M., Barbosa; S. S. S., Brugiolo; J., Carolsfeld; S. S., Leitão.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">233</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000100012"> <span id="translatedtitle">Concentrado protéico de resíduos da filetagem de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: caracterização físico-química e aceitação sensorial Protein concentrate from the residues left after filleting Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: physical-chemical characterization and sensory acceptance</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Este estudo objetivou o aproveitamento da carne mecanicamente separada (CMS de resíduos da filetagem de tilápia-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linnaeus, 1757 na obtenção de um concentrado protéico de tilápia (CPT para o consumo humano, caracterizando-o quanto aos parâmetros físico-químicos e sensoriais. O CPT foi caracterizado quanto aos seguintes aspectos: rendimento, umidade, proteína, gordura, cinzas, atividade de água (Aw e aceitação sensorial. O CPT apresentou rendimento de 18,34%, baixos níveis de umidade e cinza e alto conteúdo protéico e lipídico, quando comparado à matéria-prima original (CMS e baixa Aw. Na avaliação sensorial do CPT, a freqüência de aceitação dos provadores foi de 60,4% para a cor, 51,1% para o aspecto geral e 41,7% para o aroma. A descrição do aroma com termos como característico de pescado foi relatada por 44,2% dos provadores, sugerindo a necessidade de uma desodorização parcial do material, e indicando um equilíbrio em relação ao grupo dos provadores que não perceberam o odor característico. Esta pesquisa mostra agregação de valor a um material de descarte, gerando possibilidades de oferta de uma fonte proteica alternativa, de custo relativamente baixo.This study aimed to use mechanically separated mince (MSM from the residues left after filleting Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linnaeus, 1757 to obtain a protein concentrate for human consumption and to assess its proximal composition and sensory characteristics. Yield, proximal composition, water activity and sensory evaluation were analyzed on the dry TPC. The TPC has a yield of 18.34%, and contained 1.38% moisture, 62.39% protein, 32.63% fat, 2.26% ash and had 0.16 Aw. Sensory evaluation of dry FPC powder expressed as frequency of acceptance by panelists was 60.4% for color, 51.1% for general appearance and 41.7% for aroma. Description of flavor using terms like "typical of <span class="hlt">fish</span>" was reported by only 44.2% of the panelists, suggesting the need for a more efficient deodorizing process and showing a balance in relation to the group of panelists that did not notice the characteristic smell. The study shows the possibility of adding value to a residual food material offering an alternative source of protein at a relatively low cost.</p> <div class="credits"> <p class="dwt_author">Juliana Maria Aderaldo Vidal</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">234</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542006000600027"> <span id="translatedtitle">Silagem de resíduos da filetagem de tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, com ácido fórmico - análise Bromatológica, físico-química e microbiológica Silage of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> filetage residues with formic acid Bromatological, phisico-chemical and microbiological analyses</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O experimento avaliou o valor nutritivo da silagem ácida da filetagem da tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linneaus, 1758, visando sua utilização em substituição à farinha de peixe na alimentação de organismo aquático. A silagem consistiu de resíduos da filetagem de tilápia (carcaça e 3% de ácido fórmico, armazenada em temperatura ambiente (máxima média de 21,5ºC e temperatura mínima média de 15ºC, por trinta dias, em baldes de polietileno com um orifício, por onde os gases saiam. O pH foi monitorado no 1º, 15º e 30º dia. Foram realizadas análises microbiológicas para contagem total de microrganismos e coliformes a 35ºC e 45ºC. O pH apresentou média de 3,95 ao final dos 30 dias. Nas análises microbiológicas observou-se a ausência de coliformes a 45ºC e, que a quantidade de microrganismos diminuiu gradativamente. Do ponto de vista microbiológico, a silagem ácida de resíduo da filetagem de tilápia mostrou-se como alimento alternativo viável para a alimentação animal.The experiment was carried out for evaluate the nutritional value of the silage of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linneaus, 1758 filetage residues with formic acid as a replace of <span class="hlt">fish</span> meal in aquatic organisms feeding as protein source. The silage consisted of tilapia filetage residues (carcass and 3% formic acid, and it was stored in environmental temperature with a maximum average of 21,5º C and a minimum average of 15 º C, during thirty days, in polyethylene pails with an orifice for the exhaustion of gases. The pH was monitored on the 1st, 15th and 30th day. The microbiological analyses were made for the total count of microorganisms and coliforms at 35º C and 45º C. The average pH was 3.95 at the end of 30 days. The microbiological analyses showed absence of coliformes at 45º C and a gradual reduction in the quantity of microorganisms. From the microbiological standpoint, the acid silage of tilapia residues was shown to be an alternative viable diet for animal feeding.</p> <div class="credits"> <p class="dwt_author">Marinez Moraes de Oliveira</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">235</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000100032&lang=en"> <span id="translatedtitle">Custos de produção de tilápias (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) em um modelo de propriedade da região oeste do Estado do Paraná, Brasil / Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) production costs in a farm model of the west region of the State of Paraná, Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese O objetivo do estudo foi analisar os custos de produção da piscicultura praticada na região oeste do Paraná. Os custos são apurados mensalmente pela equipe do GEPEC/Piscicultura. Em linhas gerais, os custos referem-se à exploração comercial de uma área de 24.000m², em oito tanques, o que proporciona [...] a produção de 14,4t de tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) por ciclo de produção, com o peso unitário médio de 0,4kg. Para o custo total de implantação, a taxa de crescimento foi de 0,47% am (ao mês) e para os custos de terraplanagem, 0,63% am, sendo que o último representa em torno de 70% dos investimentos iniciais. Os custos fixos apresentaram uma taxa de crescimento de 0,032% am, o custo variável representou 70,18% do custo total de produção e uma taxa de crescimento de 0,32% am, o que exige a necessidade de se verificar alternativas para diminuir esses custos, que são bastante sensíveis às variações nos preços das matérias-primas. Ficou evidenciada a necessidade do estabelecimento de um agente responsável pela governança da cadeia, para garantir sua sobrevivência. Abstract in english The objective of this research was to analyze the production cost of <span class="hlt">fish</span> production in the western region of Paraná, Brazil. The costs were obtained monthly by the GEPEC/Pisciculture group. In general, the costs refer to the commercial exploration of a 24,000m² area, in eight tanks, which enable th [...] e production of 14.4t of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) per production cycle, with an average unit weight of 0.4kg. For the total cost of the implantation, the growth rate was of 0.47% pm (per month) and for the earthwork costs, 0.63% pm, representing around 70% of the initial investments. The fixed costs represented a growth rate of 0.032% pm, the variable cost represented 70.18% of the total production cost and a growth rate of 0.32% pm which demands the necessity of verifying alternatives to decrease these costs, which are very sensitive to the variation of raw material prices. The necessity of the establishment of a responsible agent for the leadership of the food chain was exposed to guarantee its survival.</p> <div class="credits"> <p class="dwt_author">Andrade, Rafael Luiz Barboza de; Wagner, Ricardo Luiz; Mahl, Ilson; Martins, Ricardo Silveira.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">236</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000100032"> <span id="translatedtitle">Custos de produção de tilápias (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> em um modelo de propriedade da região oeste do Estado do Paraná, Brasil Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> production costs in a farm model of the west region of the State of Paraná, Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O objetivo do estudo foi analisar os custos de produção da piscicultura praticada na região oeste do Paraná. Os custos são apurados mensalmente pela equipe do GEPEC/Piscicultura. Em linhas gerais, os custos referem-se à exploração comercial de uma área de 24.000m², em oito tanques, o que proporciona a produção de 14,4t de tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> por ciclo de produção, com o peso unitário médio de 0,4kg. Para o custo total de implantação, a taxa de crescimento foi de 0,47% am (ao mês e para os custos de terraplanagem, 0,63% am, sendo que o último representa em torno de 70% dos investimentos iniciais. Os custos fixos apresentaram uma taxa de crescimento de 0,032% am, o custo variável representou 70,18% do custo total de produção e uma taxa de crescimento de 0,32% am, o que exige a necessidade de se verificar alternativas para diminuir esses custos, que são bastante sensíveis às variações nos preços das matérias-primas. Ficou evidenciada a necessidade do estabelecimento de um agente responsável pela governança da cadeia, para garantir sua sobrevivência.The objective of this research was to analyze the production cost of <span class="hlt">fish</span> production in the western region of Paraná, Brazil. The costs were obtained monthly by the GEPEC/Pisciculture group. In general, the costs refer to the commercial exploration of a 24,000m² area, in eight tanks, which enable the production of 14.4t of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> per production cycle, with an average unit weight of 0.4kg. For the total cost of the implantation, the growth rate was of 0.47% pm (per month and for the earthwork costs, 0.63% pm, representing around 70% of the initial investments. The fixed costs represented a growth rate of 0.032% pm, the variable cost represented 70.18% of the total production cost and a growth rate of 0.32% pm which demands the necessity of verifying alternatives to decrease these costs, which are very sensitive to the variation of raw material prices. The necessity of the establishment of a responsible agent for the leadership of the food chain was exposed to guarantee its survival.</p> <div class="credits"> <p class="dwt_author">Rafael Luiz Barboza de Andrade</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">237</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2347"> <span id="translatedtitle">Digestibilidade aparente pela tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. de rações contendo sorgo (alto e baixo tanino e metionina Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. apparent digestibility of diets containing (high and low tannin sorghum and methionine</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Esse estudo teve por objetivo avaliar os efeitos da inclusão de duas variedades de sorgo (alto e baixo tanino e da metionina em rações para tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. (Perciformes, Cichlidae. Foi avaliada a digestibilidade aparente da matéria seca, proteína bruta e energia bruta. Empregaram-se 100 peixes distribuídos em 10 grupos, os quais receberam rações contendo sorgo alto e baixo tanino e 0,0%; 0,60% e 0,90% de metionina. Após um período de aclimação de três dias, foram colhidas amostras representativas das fezes produzidas diariamente até completar seis repetições de cada tratamento. A partir das análises químicas das rações e das fezes e utilizando-se o óxido de crômio como marcador inerte, foram calculados os coeficientes de digestibilidade aparente. Pode-se concluir que para tilápia do Nilo, o sorgo variedade baixo tanino apresenta coeficientes de digestibilidade aparente que podem ser considerados semelhantes aos do milho; que a variedade alto tanino apresenta coeficientes de digestibilidade aparente significativamente inferiores aos do milho e da variedade baixo tanino e; que a suplementação de metionina não é suficiente para controlar a ação antinutricional do tanino.This study was carried out in order to evaluate the effects of two sorghum varieties (high and low tannin and levels of methionine (0.0%, 0.60% and 0.90% in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. (Perciformes, Cichlidae, diets on apparent digestibility of dry matter, crude protein and crude energy. 100 <span class="hlt">fish</span> were distributed in ten aquarium (250L. After a climatization period of three days, representative samples of feces were obtained daily until reach six replicates each treatment. The apparent digestibility coefficient was calculated based in chemical analysis of diets and feces to determine chemical composition and chromic oxide. It was concluded that for Nile tilapia the low tannin sorghum has similar apparent digestibility to corn and that the high tannin variety has significant lower apparent digestibility than corn and low tannin. The supplementation of methionine it is not enough to control the anti-nutritional effect of tannin.</p> <div class="credits"> <p class="dwt_author">Giovani Sampaio Gonçalves</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">238</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.etde.org/etdeweb/details.jsp?query_id=1&page=0&osti_id=21365413"> <span id="translatedtitle">Effects of irradiation and refrigeration on the nutrients and shelf-life of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>);Efeitos da irradiacao e refrigeracao na qualidade e no valor nutritivo da tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="https://www.etde.org/etdeweb/fieldedsearch.jsp">Energy Technology Data Exchange (ETDEWEB)</a></p> <p class="result-summary">The objective of this study is to enhance the shelf-life of processed <span class="hlt">fish</span>, combining ionizing radiation and refrigeration with minimal processing. The physical, chemical, nutritional and microbiological characteristics of the specie Tilapia nilotica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were studied in eviscerated samples and in commercial cuts. The <span class="hlt">fish</span> were separated into samples irradiated with 1.0, 2.2 and 5 kGy and non-irradiated samples. They were stored at temperatures ranging from 0.5 deg C to -2 deg C for 20 and 30 days. During storage, the level of moisture in the non-irradiated samples decreased and the levels of protein and lipid increased while the irradiated samples remained stable. The levels of pH, TVB-N and NPN increased in the non-irradiated samples but tended to remain stable in the irradiated <span class="hlt">fish</span> samples. During storage, microbiological analyses for the presence of coliforms proved the efficiency of the irradiation process. The irradiated samples had a microbiological content below the levels established by the Brazilian seafood legislation, whereas the non-irradiated samples had a higher microbiological content and were not in conformity with the officially permitted levels. Salmonella spp. and Staphylococcus aureus were not detected. The levels of amino acids in muscles and fatty acids in oil remained stable in the irradiated <span class="hlt">fish</span> stored samples but decreased in the non-irradiated ones. Lipid-oxidation, measured by the TBARS test, showed a tendency to increase when the dose of irradiation increased. The storage products after 30 days showed good acceptability for sensorial parameters, appearance, odour, color and texture, so it is possible to increase the shelf life of a minimally processed tilapia using combined irradiation and refrigeration. (author)</p> <div class="credits"> <p class="dwt_author">Siqueira, Alessandra Aparecida Zilio Cozzo de</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-07-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">239</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2007/3248-3253.pdf"> <span id="translatedtitle">Extruded Leftover Food as Animal Feed: I. Effect of Extruded Feed on Growth and Feed Utilization of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Saudi Arabia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A Laboratory experiment was used to evaluate the effect of extruded leftover food as an alternate source of <span class="hlt">fish</span> diet to Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, 76.75±1.27 g. Three experimental diets were used. Two extruded leftover food types [with minerals and vitamins (type-1 and without (type-2 were used to prepare two experimental treatments in duplicate as compared to a commercial tilapia diet (ARASCO as a control. The final body weight and Specific Growth Rate (SGR were not affected by different types of leftover feed. Whereas, the Feed Conversion Ratio (FCR and the Protein Efficiency Ratio (PER were significantly affected by the different feeds. The highest significant values of FCR was shown for <span class="hlt">fish</span> fed with extruded leftover feed without premix, while Nile tilapia fed with control diet recorded the highest values of PER. The present study showed that the extruded leftover food could be used to prepare least cost diet for Nile tilapia.</p> <div class="credits"> <p class="dwt_author">Ibrahim M. Al-Ruqaie</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">240</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://dx.doi.org/10.1016/j.aquaculture.2010.01.020"> <span id="translatedtitle">Depletion of florfenicol amine, marker residue of florfenicol, from the edible fillet of tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> x O. <span class="hlt">niloticus</span> and O. <span class="hlt">niloticus</span> x O. aureus) following florfenicol administration in feed</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Aquaflor??, a 50% feed premix containing the broad spectrum antibacterial agent florfenicol is available globally to control mortality associated with economically significant systemic bacterial diseases of <span class="hlt">fish</span>. Florfenicol (FFC) is effective in controlling mortality associated with Streptococcus iniae in tilapia <span class="hlt">Oreochromis</span> sp. when administered in medicated feed at a dose of 15 mg/kg bodyweight (BW)/d for 10 consecutive days. Our objective was to characterize the depletion of the FFC marker residue, florfenicol amine (FFA), from the edible tissue of market-weight Nile tilapia O. <span class="hlt">niloticus</span> x O. <span class="hlt">niloticus</span> and hybrid tilapia O. <span class="hlt">niloticus</span> x O. aureus offered feed medicated with FFC at a nominal dose rate of 15 mg/kg BW/d for 12 days. Near market-weight tilapia were obtained from a commercial tilapia farm, distributed to 2 single pass (one for Nile tilapia and one for hybrid tilapia), flow-through systems and maintained at 27 ??C under a 15 h light:9 h dark photoperiod over a 41-d pre-dosing period. During the dosing period, tilapia were offered feed medicated with FFC at a concentration of 1.479 g/kg at 1% BW daily divided in three equal offerings. The initial 10-d dosing period was extended to 12 d because one tank did not consume > 75% of the feed offered during the first two dosing days. The total dose consumed by <span class="hlt">fish</span> in each of the 2 tanks ranged from 147 to 167 mg/kg. Once during the pre-dose period and on days 1, 2, 4, 7, 14, 21, and 28 of the post-dose period, groups of <span class="hlt">fish</span> were indiscriminately removed from each tank, measured for weight and length, scaled, filleted, and the skin-on fillets stored at amine is rapidly eliminated from tilapia fillet after withdrawal from medication and depletion followed first-order kinetics with an estimated half-life of 2.32 d. The FFA tolerance limit, calculated as the 99th percentile of the potential residue level at 95% confidence, had depleted to less than the 1 ??g/g maximum residue level by 6.14 d after the dosing period.</p> <div class="credits"> <p class="dwt_author">Gaikowski, M. P.; Mushtaq, M.; Cassidy, P.; Meinertz, J. R.; Schleis, S. M.; Sweeney, D.; Endris, R. G.</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_11");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a style="font-weight: bold;">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_13");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">241</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/download/9400/9400"> <span id="translatedtitle">Purificação, caracterização físico-química e atividade anticoagulante de glicosaminoglicanos isolados da pele de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>=Purification, physical and chemical characterization, and anticoagulant activity of glycosaminoglycans isolated from the skin of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Os glicosaminoglicanos (GAGs constituem a matriz extracelular de tecidos animais e os resíduos do processamento de peixes comercialmente cultivados podem oferecer novos agentes anticoagulantes em substituição à heparina (HEP nas ciências médicas. Objetivou-se purificar, caracterizar físico-quimicamente e avaliar a atividade anticoagulante dos GAGs isolados da pele da tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Os GAGs foram extraídos com papaína em tampão acetato de sódio 100 mM (pH 5,0 contendo cisteína e EDTA (5 mM, seguido por cromatografia de troca iônica em coluna de DEAE-celulose, utilizando um gradiente de NaCl. As frações obtidas foram liofilizadas e submetidas à eletroforese em gel de agarose a 0,5%. A atividade anticoagulante foi avaliada por meio do tempo de tromboplastina parcial ativada (TTPA, usando-se plasma humano normal e HEP padrão (193 UI mg-1. O perfil cromatográfico mostrou a separação de duas diferentes frações de GAGs (F I e F II, eluídas com 0,50 e 0,75 M de NaCl, respectivamente, revelando, por eletroforese, frações distintas em densidade de cargas, porém ambas mostrando GAGs com mobilidades semelhantes ao dermatam sulfato (DS padrão, sugerindo-se a identificação preliminar desse GAG. Os GAGs modificaram o TTPA, cujas atividades perfizeram, respectivamente, 4,72 (F I e 23,80 (F II UI mg-1, e expressaram-se dose-dependente. Portanto, o DS anticoagulante da pele de O. <span class="hlt">niloticus</span> sugere uma fonte interessante para estudos posteriores de atividade antitrombótica.Glycosaminoglycans (GAGs comprise the extracellular matrix of animal tissues, and residues from processing <span class="hlt">fish</span> commercially harvested may offer new anticoagulant agents to substitute the heparin (HEP in medical sciences. The aim of this study was to purify, characterize physico-chemically and evaluate the anticoagulant activity of GAGs isolated from the skin of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. The GAGs were extracted with papain in 100 mM sodium acetate buffer (pH 5.0 containing cystein and EDTA (5 mM, followed by ion-exchange chromatography on a DEAE-cellulose column using a NaCl gradient. The obtained fractions were lyophilizated and submitted to 0.5% agarose gel electrophoresis. The anticoagulant activity was assessed by the activated partial thromboplastin time (APTT using normal human plasma and HEP standard (193 IU mg-1. The chromatographic profile separated into two different GAGs fractions (F I and F II eluted at 0.50 and 0.75 M of NaCl, respectively, revealing fractions pattern distinct in the charge densities, but both showing GAGs with mobilities similar to standard dermatan sulfate (DS, suggesting the preliminary identification of this GAG. The GAGs modified the APTT, whose activities were, respectively, 4.72 (F I and 23.80 (F II IU mg-1, and expressed themselves dose-dependent. Therefore, the anticoagulant DS from O. <span class="hlt">niloticus</span> suggests an interesting source for posterior studies of antithrombotic activity.</p> <div class="credits"> <p class="dwt_author">José Ariévilo Gurgel Rodrigues</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">242</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000600005&lang=en"> <span id="translatedtitle">Cytochemical aspects of the peripheral blood cells of <span class="hlt">Oreochromis</span> (Tilapia) <span class="hlt">niloticus</span>. (Linnaeus, 1758) (Cichlidae, Teleostei): part II / Aspectos citoquímicos das células do sangue periférico de <span class="hlt">Oreochromis</span> (Tilapia) <span class="hlt">niloticus</span>. (Linnaeus, 1758) (Cichlidae, Teleostei): parte II</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Morfologicamente foram identificados no sangue de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> sete tipos de células: eritrócitos, trombócitos, neutrófilos, eosinófilos, basófilos, linfócitos e monócitos. Em relação aos resultados citoquímicos foi contastada a presença de glicogênio em neutrófilos, trombócitos e em alguns [...] linfócitos e monócitos. Os grânulos citoplasmáticos de neutrófilos e eosinófilos mostraram positividade para mieloperoxidade e Sudan black. O azul de bromofenol foi totalmente positivo em eritrócitos e eosinófilos. Abstract in english Morphologicaly, seven types of cells were identified in the blood of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>: erythrocytes, thrombocytes, neutrophils, eosinophils, basophils, lymphocytes and monocytes. Glycogen was present not only in the cytoplasm of neutrophils and thrombocytes but also in some lymphocytes and mono [...] cytes. The positive reaction for myeloperoxidase and Sudan black was observed in neutrophils and eosinophils. The bromphenol blue method was strongly positive for erythrocytes and eosinophils.</p> <div class="credits"> <p class="dwt_author">UEDA, Ivete Kotomi; EGAMI, Mizue Imoto; SASSO, Wilson da Silva; MATUSHIMA, Eliana Reiko.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">243</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.ve/scielo.php?script=sci_arttext&pid=S0004-06222004000400010&lang=en"> <span id="translatedtitle">Evaluación de la calidad bacteriológica de tilapia fresca (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) proveniente de la Zona Norte de Costa Rica</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish El presente trabajo evaluó la flora normal y patógena asociada a la tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), ya que no existen estudios previos, a nivel nacional, sobre la calidad microbiológica de este producto. Con este propósito, se determinó el Recuento Total Aerobio (RT), el número de coliformes totale [...] s (CT) y coliformes fecales (CF), Enterococcus sp., Aeromonas sp., bacterias lácticas y la presencia de Listeria sp y Salmonella spp. a partir de la superficie externa de la tilapia. Se recolectaron 50 muestras provenientes de las zonas de San Carlos y Cañas y se transportaron en frío hasta el Laboratorio de Microbiología de Alimentos y Aguas de la Facultad de Microbiología, Universidad de Costa Rica, donde se efectuaron los análisis señalados según la metodología presentada por la American Publilc Health Association, 1998. Los resultados obtenidos confirman, desde el punto de vista microbiológico, la frescura de las tilapias al momento de su análisis, sin embargo, los niveles de coliformes encontrados fueron inaceptables para el consumo humano. No se logró aislar Listeria sp., pero el aislamiento de Salmonella spp. confirmó la contaminación fecal de las aguas de crianza de la tilapia, aparte de su importancia a nivel de salud pública. También se encontró que la tilapia presenta un número elevado de Aeromonas sp. como parte de su flora normal, por lo que se recomienda incluir este género dentro de las normas de calidad para pescado fresco. Según los datos obtenidos, no existe diferencia significativa (95% de confianza) entre el RT, los niveles de CT y CF, Enterococcus sp y Aeromonas sp. a partir de la tilapia proveniente de los criaderos de las zonas de San Carlos y Cañas. Abstract in english SUMMARY Bacteriological evaluation of fresh tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) coming from the northern region of Costa Rica. The following work presents an evaluation of the normal and pathogenic flora associated to tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), since there are no previous national studies referred [...] to the microbiological quality of this product. The total aerobic plate count, lactic bacteria, Enterococcus sp and Aeromonas sp and fecal and total coliform count, and the presence of Listeria sp and Salmonella spp from the external surface of tilapias were evaluated. A total of 50 samples, coming from San Carlos and Cañas zones were transported in ice to the Food and Water Microbiology Laboratory, Universidad de Costa Rica, where the laboratory analysis were performed, according to the methodology presented by de American Public Health Association, 1998. The results obtained confirm the microbiological freshness of the product when the analysis was performed, although coliform levels were unacceptable. Listeria sp was not found, but the isolation of Salmonella spp. confirms the fecal contamination of water where the tilapia is grown, aside of the Public Health concern. Also, it was found a high number of Aeromonas sp, as part of its normal flora, so we recommend including this genus in the quality standards for fresh <span class="hlt">fish</span>. According to the data obtained, there was no significant difference (95% confidence) between the total plate count, fecal and total coliforms, Enterococcus sp. and Aeromonas sp. from the samples coming from the zones of San Carlos and Cañas.</p> <div class="credits"> <p class="dwt_author">Graciela, Morales; Laura, Blanco; María Laura, Arias; Carolina, Chaves.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">244</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ccsenet.org/journal/index.php/jas/article/view/24010"> <span id="translatedtitle">The Role of Spirulina platensis (Arthrospira platensis in Growth and Immunity of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Its Resistance to Bacterial Infection</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The current study was designed to optimize the dietary levels of Spirulina platensis in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>; this was tested via graded levels. Six isonitrogenous and isocaloric rations containing graded levels of dried spirulina 0, 5, 7.5, 10, 15 and 20 g/kg diet were fed separately to six equal groups of O. <span class="hlt">niloticus</span> fingerlings for 3 months. Growth performance, non-specific immune parameters, tissue reactions and resistance of tilapias post challenge infection with Pseudomonas fluorescens were estimated monthly. There were significant increase in growth performance parameters and survival rates in spirulina-supplemented groups at concentration level of 10 g/kg for 2 months. Significant increases in hematocrit, nitroblue tetrazolium and lysozyme activity were observed in most of the supplemented groups. Bacterial challenge infections resulted in significantly lower mortality rate in all Spirulina groups with remarkable increase in protection of <span class="hlt">fish</span> received 10 g/kg. In sum, it advisable to incorporate 10 g/kg diet of spirulina for 2 months for maximum growth performance, immunity and disease resistance in O. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Mai D. Ibrahem</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">245</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::93658676129ae72340a7a2302e16ca76"> <span id="translatedtitle">Effect of cortisol on some osmoregulatory parameters of the teleost, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., after transference from freshwater to seawater Efeito do cortisol sobre parâmetros de osmorregulação do teleósteo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., após a transferência de água doce para água salgada</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">This trial was conducted in order to determine the effects of cortisol on salt water acclimation of tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.). Tilapia (n=42) were injected intraperitoneally with cortisol and then were directly transferred from freshwater (FW) to 15‰ salt water (SW). Changes in plasma osmolality, chloride ion concentration (Cl-), plasma level of cortisol and gill Na+, K+-ATPase activity were measured at 6, 12, 24, 48, 72 and 168 hours after transference to 15‰ SW. Plasma ...</p> <div class="credits"> <p class="dwt_author">Fontai?nhas-fernandes, A.; Gomes, E. F.; Reis-henriques, Mª A.; Coimbra, J.</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">246</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.sjst.psu.ac.th/journal/aquatic-suppl-pdf/12-fish-waste-Nile-tilapia.pdf"> <span id="translatedtitle">Use of <span class="hlt">fish</span> processing waste as protein source in diet for Nile tilapia (Orechromis <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Five diets were prepared using <span class="hlt">fish</span> processing waste meal (FMFP to replace <span class="hlt">fish</span> meal (FM at inclusion levels of 0, 25, 50, 75 and 100%. Frog diet was used as a control diet. Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were reared in laboratory conditions for 8 weeks. It was found that substitution levels of protein from FMFP in the tested diets reduced growth and feed efficiency of tilapia (p<0.05. However, the differences looks like significant trend especially that between the 100% substitution level and the frog diet. Substitution of FM by FMFD at 75% reduced cost of feed by 15.35%. It was concluded that up to 75% inclusion of FMFD in the diet of tilapia could support normal growth of Nile tilapia with the potential for substitution of FM.</p> <div class="credits"> <p class="dwt_author">Chotipuntu, P.</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">247</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000300002"> <span id="translatedtitle">Digestibilidade aparente da energia e nutrientes do farelo de canola pela tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Este estudo foi realizado para determinar a energia digestível e a digestibilidade aparente de nutrientes do farelo de canola pela tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. O óxido de crômio (0,1% foi utilizado como indicador inerte em dieta semi-purificada, com coleta de fezes pelo sistema Guelph. Os peixes foram alimentados até saciedade aparente. O farelo de canola apresentou valores de energia e nutrientes digestíveis de: 77,84; 71,99; 86,92; 88,19; 67,16 e 29,86% para a matéria seca, energia, proteína, lipídios, cálcio e fósforo, respectivamente, correspondendo a 2969,98 (kcal/kg; 69,97; 32,6; 1,2; 0,41 e 0,28%, de energia digestível, matéria seca, proteína e lipídios digestíveis e cálcio e fósforo disponíveis, respectivamente. Os resultados obtidos neste trabalho evidenciam que a tilápia do Nilo pode utilizar eficientemente o farelo de canola.</p> <div class="credits"> <p class="dwt_author">Furuya Wilson Massamitu</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">248</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100024"> <span id="translatedtitle">Application of the comet assay in erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces: a methodological comparison</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The present study applied the comet assay to erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> with the aim of improving protocols to detect DNA damage in these cells, by using two distinct pHs (pH = 12.1 and pH > 13 and evaluating whether there is a correspondence between silver and ethidium bromide staining. Comets were visually examined and, the frequency of cells with and without damage was obtained, as well as the distribution of classes and scores. By using the Kruskal-Wallis test, our results revealed that pH 12.1 is more effective, although both pHs can be used. Our findings also suggest that silver staining can substitute ethidium bromide, an expensive and highly toxic stain that requires specific equipment for examination.</p> <div class="credits"> <p class="dwt_author">Cintya A. Christofoletti</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">249</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000100024&lang=en"> <span id="translatedtitle">Application of the comet assay in erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Pisces): a methodological comparison</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in english The present study applied the comet assay to erythrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> with the aim of improving protocols to detect DNA damage in these cells, by using two distinct pHs (pH = 12.1 and pH > 13) and evaluating whether there is a correspondence between silver and ethidium bromide staining. [...] Comets were visually examined and, the frequency of cells with and without damage was obtained, as well as the distribution of classes and scores. By using the Kruskal-Wallis test, our results revealed that pH 12.1 is more effective, although both pHs can be used. Our findings also suggest that silver staining can substitute ethidium bromide, an expensive and highly toxic stain that requires specific equipment for examination.</p> <div class="credits"> <p class="dwt_author">Christofoletti, Cintya A.; David, José Augusto O.; Fontanetti, Carmem S..</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">250</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2006/2236-2242.pdf"> <span id="translatedtitle">Toxicity and Efficacy of Lidocaine as an Anesthetic for Nile Tilapia; <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The anesthetic lidocaine was tested for its toxicity, efficacy and safety on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Toxicity values were variable and depended mainly on concentration and time of exposure. Concentrations of 60, 80 and 100 mg L-1 lidocaine were all effective for rapid anesthesia with 100% survival. In moderately rapid anesthesia, 40 mg L-1 lidocaine induced loss of equilibrium in Nile tilapia within 20 min exposure and 100% survival. Safety Index (SI values for lidocaine on Nile tilapia indicated that the shorter the exposure time, the higher SI values. Repeated anesthesia in freshly prepared solution of lidocaine did not appear to affect on Nile tilapia sensitivity in terms of anesthetization, recovery and survival. However, results were in contrast and variable when previously prepared (old solutions of lidocaine were used.</p> <div class="credits"> <p class="dwt_author">H.H.H. Abbas</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">251</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://dx.doi.org/10.1300/J028v14n01_06"> <span id="translatedtitle">Phosphorous digestibility and activity of intestinal phytase in hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> X O. aureus</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Experiments were conducted to determine the degree to which phytate-bound phosphorus from plant protein sources could be used by hybrid tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> X O. aureus). Utilizing an inert marker technique with chromic oxide, hybrid tilapia in our study were effective at utilizing both inorganic and phytate phosphorus as evidenced by average apparent digestibility values of 93.2% and 90.0% for total and phytate phosphorus, respectively. Analysis of the intestinal brush border membrane of the tilapia revealed enzyme activity that was capable of hydrolyzing phytic acid. The presence of phytic acid hydrolyzing enzyme activity in the intestinal brush border provides a probable mechanism by which these hybrid tilapia are able to utilize phytate phosphorus effectively. ?? 2003 by The Haworth Press, Inc. All rights reserved.</p> <div class="credits"> <p class="dwt_author">La, Vorgna, M. W.; Hafez, Y.; Hughes, S. G.; Handwerker, T.</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">252</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.etde.org/etdeweb/details.jsp?query_id=1&page=0&osti_id=21050955"> <span id="translatedtitle">Mechanical and thermal properties of irradiated films based on Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) proteins</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="https://www.etde.org/etdeweb/fieldedsearch.jsp">Energy Technology Data Exchange (ETDEWEB)</a></p> <p class="result-summary">Proteins are considered potential material in natural films as alternative to traditional packaging. When gamma radiation is applied to protein film forming solution it resulted in an improvement in mechanical properties of whey protein films. The objective of this work was the characterization of mechanical and thermal properties of irradiated films based on muscle proteins from Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The films were prepared according to a casting technique with two levels of plasticizer: 25% and 45% glycerol and irradiated in electron accelerator type Radiation Dynamics, 0.550 MeV at dose range from 0 to 200 kGy. Thermal properties and mechanical properties were determined using a differential scanning calorimeter and a texture analyzer, respectively. Radiation from electron beam caused a slightly increase on its tensile strength characteristic at 100 kGy, while elongation value at this dose had no reduction.</p> <div class="credits"> <p class="dwt_author">Sabato, S.F. [Radiation Technology Center, IPEN-CNEN/SP, Av. Lineu Prestes 2242, 05508 900 Sao Paulo, SP (Brazil)], E-mail: sfsabato@ipen.br; Nakamurakare, N.; Sobral, P.J.A. [Food Engineering Department, ZEA/FZEA/USP, Av. Duque de Caxias Norte 225, 13635 900 Pirassununga, SP (Brazil)</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-15</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">253</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://inis.iaea.org/search/search.aspx?orig_q=RN:39067780"> <span id="translatedtitle">Mechanical and thermal properties of irradiated films based on Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) proteins</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://inis.iaea.org/search/">International Nuclear Information System (INIS)</a></p> <p class="result-summary">Proteins are considered potential material in natural films as alternative to traditional packaging. When gamma radiation is applied to protein film forming solution it resulted in an improvement in mechanical properties of whey protein films. The objective of this work was the characterization of mechanical and thermal properties of irradiated films based on muscle proteins from Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The films were prepared according to a casting technique with two levels of plasticizer: 25% and 45% glycerol and irradiated in electron accelerator type Radiation Dynamics, 0.550 MeV at dose range from 0 to 200 kGy. Thermal properties and mechanical properties were determined using a differential scanning calorimeter and a texture analyzer, respectively. Radiation from electron beam caused a slightly increase on its tensile strength characteristic at 100 kGy, while elongation value at this dose had no reduction</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">254</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://adsabs.harvard.edu/abs/2007RaPC...76.1862S"> <span id="translatedtitle">Mechanical and thermal properties of irradiated films based on Tilapia ( <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) proteins</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Proteins are considered potential material in natural films as alternative to traditional packaging. When gamma radiation is applied to protein film forming solution it resulted in an improvement in mechanical properties of whey protein films. The objective of this work was the characterization of mechanical and thermal properties of irradiated films based on muscle proteins from Nile Tilapia ( <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The films were prepared according to a casting technique with two levels of plasticizer: 25% and 45% glycerol and irradiated in electron accelerator type Radiation Dynamics, 0.550 MeV at dose range from 0 to 200 kGy. Thermal properties and mechanical properties were determined using a differential scanning calorimeter and a texture analyzer, respectively. Radiation from electron beam caused a slightly increase on its tensile strength characteristic at 100 kGy, while elongation value at this dose had no reduction.</p> <div class="credits"> <p class="dwt_author">Sabato, S. F.; Nakamurakare, N.; Sobral, P. J. A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">255</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23501490"> <span id="translatedtitle">The protective role of l-carnitine against cylindrospermopsin-induced oxidative stress in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Cylindrospermopsin (CYN) is one of the most important cyanotoxins in terms of both human health and environmental quality and is produced by several different species of cyanobacteria, including Aphanizomenon ovalisporum. The principal mechanisms of action of CYN involve inhibition of protein and glutathione synthesis. In addition, CYN-mediated genotoxicity results from DNA fragmentation. The results of both in vivo and in vitro studies suggest that oxidative stress also plays a significant role in CYN pathogenesis in <span class="hlt">fish</span>. We investigated the protective effects of l-carnitine (LC) pre-treatment on A. ovalisporum-induced oxidative stress in cells containing CYN and deoxy-CYN, or pure standard CYN, in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) that had been acutely exposed via oral administration. Various oxidative stress markers, including lipid peroxidation (LPO), protein oxidation, DNA oxidation, and the ratio of reduced glutathione to oxidised glutathione (GSH/GSSG), and the activities of NADPH oxidase, superoxide dismutase (SOD), catalase (CAT), and gamma-glutamyl-cysteine synthetase (?-GCS), were evaluated in the livers and kidneys of <span class="hlt">fish</span> in the absence and presence of 400 or 880mgLC/kgfish/day during a 21 day period prior to CYN-intoxication. The results of our study demonstrated for the first time the beneficial antioxidant effects of LC dietary supplementation on oxidative stress status in <span class="hlt">fish</span>. No pro-oxidant effects were detected at any of the LC doses assayed, suggesting that LC is a chemoprotectant that reduces hepatic and renal oxidative stress and may be effective when used for the prophylaxis and treatment of CYN-related intoxication in <span class="hlt">fish</span>. PMID:23501490</p> <div class="credits"> <p class="dwt_author">Guzmán-Guillén, R; Prieto, A I; Vázquez, C M; Vasconcelos, V; Cameán, A M</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-05-15</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">256</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5470"> <span id="translatedtitle">Predation of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae by Pantala flavescens with different length classes - doi: 10.4025/actascibiolsci.v33i4.5470 Predation of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae by Pantala flavescens with different length classes - doi: 10.4025/actascibiolsci.v33i4.5470</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The experiment had as objective to study the survival of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. <span class="hlt">niloticus</span>, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L containing one larvae of Odonate and 10 larvae of <span class="hlt">fish</span> were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h, the remnant larvae of <span class="hlt">fish</span> (alive in each experimental unit was quantified, and we replaced the consumed larvae, so that we always had 10 larvae of <span class="hlt">fish</span> at each aquarium after each counting. For both <span class="hlt">fish</span> species, there was a slight increase in consumption by the Odonate with intermediate size, but the values did not differ statistically (p > 0.05. Larvae of Odonate in the treatments with greater length presented a lower consumption (p The experiment had as objective to study the survival of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. <span class="hlt">niloticus</span>, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L containing one larvae of Odonate and 10 larvae of <span class="hlt">fish</span> were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h, the remnant larvae of <span class="hlt">fish</span> (alive in each experimental unit was quantified, and we replaced the consumed larvae, so that we always had 10 larvae of <span class="hlt">fish</span> at each aquarium after each counting. For both <span class="hlt">fish</span> species, there was a slight increase in consumption by the Odonate with intermediate size, but the values did not differ statistically (p > 0.05. Larvae of Odonate in the treatments with greater length presented a lower consumption (p < 0.05 than in other treatments.</p> <div class="credits"> <p class="dwt_author">Carlos Eduardo Bento Fernandes</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">257</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.mdpi.com/2071-1050/6/2/652"> <span id="translatedtitle">Effects of Two Environmental Best Management Practices on Pond Water and Effluent Quality and Growth of Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The trajectory of aquaculture growth in sub-Saharan Africa has necessitated closer attention to the use of environmental best management practices (BMPs. Two BMPs in particular, water reuse and floating feeds, are being promoted for adoption by pond <span class="hlt">fish</span> farmers in sub-Saharan Africa. In this study, we investigated: (1 the effect of water source and feed type on water quality; (2 the effect of water source and feed type on tilapia growth; and (3 the quality of potential effluents from ponds using different water source and feed types. The study was conducted in Ghana using on-farm experiments involving monitoring of water quality and growth of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> for 160 days. Although considered low-intensity production systems, nutrients and solids in the study ponds exceeded levels expected in intensive culture ponds by wide margins, whereas BOD5 was within the range for semi-intensive ponds. Floating feed was associated with higher water quality, especially dissolved oxygen, and higher growth, but water source did not significantly affect growth. Water reuse appears to be a viable BMP for sustainable aquaculture in the region, but the use of floating feed as BMP will depend on the economic profitability of floating feed use.</p> <div class="credits"> <p class="dwt_author">Emmanuel A. Frimpong</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">258</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842007000400016&lang=en"> <span id="translatedtitle">Agonistic and reproductive behaviors in males of red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae) / Comportamento agonístico e reprodutivo nos machos de híbrido vermelho de tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese O híbrido vermelho de tilápia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) é um híbrido fértil utilizado na piscicultura numa escala semi-intensiva no Nordeste brasileiro. É um ciclídeo territorial e altamente agressivo frente a coespecíficos na época reprodutiva. O objetiv [...] o deste estudo foi investigar e descrever os comportamentos agressivos exibidos pelos machos deste híbrido em contextos não-reprodutivos e reprodutivos. As observações comportamentais mostraram que as agressões exibidas pelos machos de híbrido vermelho de tilápia incluíram ameaça, ondulação, confronto paralelo, lateral e frontal, perseguição, fuga e submissão. A posse do território influenciou a agressividade dos machos, cuja intensidade foi maior no próprio território em relação àquela observada em situação neutra. Os ninhos foram escavados pelos machos independente da presença das fêmeas. Todos os padrões comportamentais descritos estavam de acordo com os padrões previamente descritos para uma das espécies parentais, a Tilápia do Nilo, O. <span class="hlt">niloticus</span>. Abstract in english The red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) x O. mossambicus (Peters, 1852) is a fertile hybrid used in the semi-intensive level of <span class="hlt">fish</span> culture in the Northeast of Brazil. It is a territorial cichlid and is highly aggressive towards conspecifics during the breeding season. The pu [...] rpose of this study was to investigate and describe the aggressive behaviour displayed by the males of this hybrid in non-reproductive and reproductive contexts. Behavioural observations revealed that aggression displayed by the reproductive males of red hybrid tilapia included threatening, undulation, parallel, lateral and frontal attacks, chasing, escape and submission. Possession of a territory influenced male aggressiveness, which was more intense in their own territory than that observed in a neutral situation. The males built nests, irrespective of female presence. All the behavioural patterns were in accordance with those previously described for one parental species, the Nile tilapia, O. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">APT, Medeiros; S, Chellappa; ME, Yamamoto.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">259</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842007000400016"> <span id="translatedtitle">Agonistic and reproductive behaviors in males of red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 x O. mossambicus (Peters, 1852 (Osteichthyes: Cichlidae Comportamento agonístico e reprodutivo nos machos de híbrido vermelho de tilápia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 x O. mossambicus (Peters, 1852 (Osteichthyes: Cichlidae</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The red hybrid tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 x O. mossambicus (Peters, 1852 is a fertile hybrid used in the semi-intensive level of <span class="hlt">fish</span> culture in the Northeast of Brazil. It is a territorial cichlid and is highly aggressive towards conspecifics during the breeding season. The purpose of this study was to investigate and describe the aggressive behaviour displayed by the males of this hybrid in non-reproductive and reproductive contexts. Behavioural observations revealed that aggression displayed by the reproductive males of red hybrid tilapia included threatening, undulation, parallel, lateral and frontal attacks, chasing, escape and submission. Possession of a territory influenced male aggressiveness, which was more intense in their own territory than that observed in a neutral situation. The males built nests, irrespective of female presence. All the behavioural patterns were in accordance with those previously described for one parental species, the Nile tilapia, O. <span class="hlt">niloticus</span>.O híbrido vermelho de tilápia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758 x O. mossambicus (Peters, 1852 é um híbrido fértil utilizado na piscicultura numa escala semi-intensiva no Nordeste brasileiro. É um ciclídeo territorial e altamente agressivo frente a coespecíficos na época reprodutiva. O objetivo deste estudo foi investigar e descrever os comportamentos agressivos exibidos pelos machos deste híbrido em contextos não-reprodutivos e reprodutivos. As observações comportamentais mostraram que as agressões exibidas pelos machos de híbrido vermelho de tilápia incluíram ameaça, ondulação, confronto paralelo, lateral e frontal, perseguição, fuga e submissão. A posse do território influenciou a agressividade dos machos, cuja intensidade foi maior no próprio território em relação àquela observada em situação neutra. Os ninhos foram escavados pelos machos independente da presença das fêmeas. Todos os padrões comportamentais descritos estavam de acordo com os padrões previamente descritos para uma das espécies parentais, a Tilápia do Nilo, O. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">APT Medeiros</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">260</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::dd5833d880f62dbf08ed38cee4e4903d"> <span id="translatedtitle">The Effects of Some Phytobiotics on Biochemical Composition of <span class="hlt">Oreochromis</span> <span class="hlt">Niloticus</span> Meat Reared in a Recirculating Aquaculture System</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The purpose of this experiment is the evaluation of biochemical composition of Nile tilapia meat by administrating  several phytobiotics in feed. <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, with an initial average weight of 125.41±34.33 g/exemplar, were reared, during six weeks in a recirculating aquaculture system. The phytobiotics from this experiment were administered in feed in a concentration of 1%/kg feed and consist in: thyme (Thymus vulgaris), fenugreek (Trigonela foenum graecum), neem (Azad...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_12");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a style="font-weight: bold;">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_14");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">261</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::a3515996e254a57c7218652cdbf497b7"> <span id="translatedtitle">Skeletal Ossification Impairment in Nile Tilapia (<I><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></I>) after Exposure to Lead Acetate</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Heavy metal pollution represents a serious problem facing many of the aquatic organisms. Lead is one of the most toxic elements found in many industrial effluents which are metabolized inside bodies and can cause skeletal deformities by impairing developmental processes and bone formation. This study was undertaken to determine the LC50 of Pb-acetate and detect the effect of 1/10 LC50 exposure on fingerlings of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Modern and accu...</p> <div class="credits"> <p class="dwt_author"></p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">262</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::5f93d4d1564e629cf2a7827a6f14ac80"> <span id="translatedtitle">Effects of an experimental challenge with Mycobacterium marinum on the blood parameters of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1757)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">A hundred adult of tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, were inoculated intraperitoneally with 10(8) c.f.u. of Mycobacterium marinum. Other 100 speciemns were maintained without inoculation. Blood samples of six inoculated animals were collected at 01, 03, 07, 14, 21, 28, 35, 42, 49, 56 and 84 days after inoculation. Initially, six specimens were taken from the non inoculated group ("time zero"). The haematological parameters determined were: haematocrit (Hct), haemoglobin concentration (Hgb), tot...</p> <div class="credits"> <p class="dwt_author">Maria José Tavares Ranzani-Paiva; Carlos Massatoshi Ishikawa; Augusta Cocuzza das Eiras; Vivian Risaffi da Silveira</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">263</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::c9c1059274de2999dba72cc48cb6609b"> <span id="translatedtitle">Apparent Digestibility Coefficients of Protein in Selected Feedstuffs for Juvenile Nile Tilapia (<i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> </i>Linnaeus, 1758)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Apparent Digestibility Coefficients (ADC) of protein in anchovy (Engraulis encrasicolus), corn (Zea mays) gluten, soybean (Glycine hispida), gammarid (Gammarus kischineffensis) and crayfish (Astacus leptodactylus leptodactylus) exoskeleton meals was determined for juvenile Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. In each of five trials, a reference diet was mixed with test ingredients in a 70:30 ratio to produce a series of test diets. Chromic oxide was a...</p> <div class="credits"> <p class="dwt_author">Kenan Koprucu; Pinar Tatli Seven; Gulizar Tuna</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">264</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::92ea202bf405d9a625e22c513289d596"> <span id="translatedtitle">Toxicity and Efficacy of Lidocaine as an Anesthetic for Nile Tilapia; <i><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></i></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The anesthetic lidocaine was tested for its toxicity, efficacy and safety on Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Toxicity values were variable and depended mainly on concentration and time of exposure. Concentrations of 60, 80 and 100 mg L-1 lidocaine were all effective for rapid anesthesia with 100% survival. In moderately rapid anesthesia, 40 mg L-1 lidocaine induced loss of equilibrium in Nile tilapia within 20 min exposure and 100% survival. Safety Index (SI...</p> <div class="credits"> <p class="dwt_author">Abbas, H. H. H.; Abdel-gawad, A. S.; Akkr, A. A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">265</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300011&lang=en"> <span id="translatedtitle">Antibiotic resistence of Aeromonas hydrophila isolated from Piaractus mesopotamicus (Holmberg, 1887) and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) / Resistência de Aeromonas hydrophila isolada de Piaractus mesopotamicus (Holmberg, 1887) e <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) a antibióticos</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Um dos maiores problemas envolvendo o tratamento com antibióticos contra Aeromonas hydrophila isolada de peixes confinados é a rápida resistência ao antibiótico desenvolvida pela bactéria. A atividade antimicrobiana de quimioterapêuticos em isolados a partir de pacu Piaractus mesopotamicus (Holmberg [...] , 1887) e tilápia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758) foi verificada pelo método de difusão de antibiótico em discos de Kirby-Bauer, sobre uma superfície de Agar Mueller-Hinton previamente inoculada com 100 µL de suspensão bacteriana. Após o período de incubação, os isolados de tilápia e pacu foram uniformemente resistentes a amoxicilina, ampicilina, lincomicina, novobiocina, oxacilina, penicilina e trimetoprim+sulfametoxazol. A cepa tipo para A. hydrophila apresentou resistência às mesmas substâncias antimicrobianas e também contra a rifampicina; o isolado bacteriano de pacu foi a única linhagem resistente a tetraciclina. Isolados de pacu e tilápia apresentaram resistência intermediária frente a eritromicina. O uso de medicamentos em pisciculturas comerciais no Brasil pode favorecer o desenvolvimento de linhagens bacterianas resistentes em espécies de peixes nativos, como já observado em espécies exóticas comercialmente produzidas há mais tempo. Abstract in english One of the most important problems involving treatments with antibiotics against Aeromonas hydrophila isolated from <span class="hlt">fishes</span> is that antibiotic resistance develops readily. The antimicrobial activity of chemotherapeutants in isolates from pacu Piaractus mesopotamicus (Holmberg, 1887) and tilapia Oreoc [...] hromis <span class="hlt">niloticus</span> (Linnaeus, 1758) was tested by the Kirby-Bauer disk method, over Mueller-Hinton surface agar previously inoculated with 100 µL of bacterial suspensions. After regular incubation, isolates from tilapia and pacu were uniformly resistant to amoxicillin, ampicillin, lincomycin, novobiocin, oxacillin, penicillin, and trimetoprim+sulfametoxazole. The A. hydrophila type strain presented resistance to the same antimicrobial substances and also against rifampicin; the bacterial isolate from pacu were the only strain resistant to tetracyclin. Isolates from both pacu and tilapia had intermediate reaction with erytromycin. The use of drugs in commercial <span class="hlt">fish</span> farms in Brazil can favor the development of resistant bacterial strains in native <span class="hlt">fish</span> species as already observed for exotic species, commercially produced for longer time.</p> <div class="credits"> <p class="dwt_author">Andréa, Belém-Costa; José Eurico Possebon, Cyrino.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">266</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200015&lang=en"> <span id="translatedtitle">Effect of the establishment of dominance relationships on cortisol and other metabolic parameters in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in english The objective of the present study was to investigate the influence of the establishment of dominance relationships and social stress on plasma cortisol and metabolite levels in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). During the 30-day experiment, the <span class="hlt">fish</span> weighing 236 ± 29 g were kept in individual a [...] quaria, except for two pairings lasting 6 h each. Blood samples were taken from the animals before and after pairing. Display, approach, attack, rebuff, chase flight, and coloration were carried out on days 16 and 30. Activities and behaviors characteristic of the establishment of dominance relationships were described. It was possible to classify all experimental <span class="hlt">fish</span> (N = 30) as dominant or subordinate. No differences were detected between dominant (N = 15) and subordinate (N = 15) <span class="hlt">fish</span> during isolation or after pairing in cortisol (isolated: 5.76 ± 0.98 vs 5.42 ± 0.63; paired: 10.94 ± 1.62 vs 11.21 ± 2.45 µg/dl), glucose (isolated: 60.02 ± 4.9 vs 67.85 ± 16.16; paired: 110.44 ± 15.72 vs 136.26 ± 22.46 mg/dl), triglyceride (isolated: 167.87 ± 5.06 vs 185.68 ± 7.24; paired: 210.85 ± 13.40 vs 221.82 ± 12.70 mg/dl) or total protein levels (isolated: 7.01 ± 0.42 vs 6.69 ± 0.59; paired: 9.21 ± 0.62 vs 9.51 ± 0.66 g/dl). However, when isolated (N = 30) and paired (N = 30) tilapia were compared, there were significant differences in cortisol and metabolite levels. The similar response presented by dominant and subordinate tilapia indicates that establishment of dominance relationships was a stressor for both groups.</p> <div class="credits"> <p class="dwt_author">Corrêa, S.A.; Fernandes, M.O.; Iseki, K.K.; Negrão, J.A..</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">267</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::a25c9147f27d547b9f51ea10964eb0fe"> <span id="translatedtitle">Shrimp meal in diets for Nile tilapia ("<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>") Farinha de camarão em dietas para tilápia do Nilo ("<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>")</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Replacement of conventional ingredients used in <span class="hlt">fish</span> diets by non-conventional products has been an economic alternative to reduce the cost of feeding. Therefore, 90-day trial was performed to study the effect of shrimp meal (SM) inclusion on diets of Nile tilapia fries. Weight gain (WG), feed conversion (FC), apparent feed intake (AFI), fillet yield (FY), fillet income (FI) values and protein effiency ratio (PER) were evaluated. Each experimental unit was an aquaria with five tilapias (Oreoc...</p> <div class="credits"> <p class="dwt_author">Igo Gomes Guimarães; Edma Carvalho de Miranda; Valéria Louro Ribeiro; Graciela Pessoa Martins; Carolina Carvalho de Miranda</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">268</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23894941"> <span id="translatedtitle">Reproduction, food dynamics and exploitation level of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes: Cichlidae) from artisanal fisheries in Barra Bonita Reservoir, Brazil.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), which is exotic to South America, is the most common species caught in artisanal fisheries at the Barra Bonita Reservoir, Southeastern Brazil. This species is of great socioeconomic importance for the region and keeps active a population of about 500 fishers. In the present study we assess reproduction, food dynamics and level of exploitation of O. <span class="hlt">niloticus</span>, caught by artisanal fisheries in the Barra Bonita Reservoir. Specimens were collected monthly, from July 2004-June 2005, and a total of 1 715 specimens were analyzed. Each specimen was examined to obtain biological and biometric data: standard length (cm), total weight (g), reproductive data (sex and stage of maturation), and stomach contents (empty, partly full, and full). We also estimated the sex ratio (by macroscopic observation of gonads), reproductive period (by ovarian development and seasonal average of gonadosomatic index in females), and feeding habits (by stomach contents). The possible relationship between abiotic factors and the reproductive period was statistically verified using Spearman's Rank Correlation. The FiSAT (ELEFAN I) package was used to assess growth parameters, mortality rates and to infer exploitation rate from standard length frequencies. The O. <span class="hlt">niloticus</span> population had a sex ratio of 1.3:1 (M:F). Results indicated that ripe females were captured throughout the year, with a higher frequency during the winter-2004 (with a frequency of 59%, at a mean temperature of 20.5 degreeC), and in spring-2004 (with a frequency of 60.5% at a mean temperature of 21.18 degreeC). The GSI mean values obtained by season were: winter-2004: 1.71; spring-2004: 1.72; summer-2005: 0.80, and autumn-2005: 1.19. The Spearman correlation indicated positive values with respect to pH, dissolved oxygen, electric conductivity, transparency and chlorophyll a, and negative values with respect to temperature, accumulated rainfall and altimetric benchmark. The main food items were phytoplankton and periphytic algae, observed in 99.6% of the analyzed stomachs. The estimated growth and mortality parameters were: Linfinity=33.60cm, k=0.63/year, longevity= 4.76years, Z=2.81/ year, M=1.20/year and F=1.61/year. The weight-length relationship was Ln Wt=-2.8532+2.8835 Ln Lp. The estimated yield per recruit values were as follows: E=0.570, Emax=0.776, E0.1=0.604 and E0.5=0.349. These results indicate that a well established population of O. <span class="hlt">niloticus</span> is present at Barra Bonita Reservoir; with an active reproduction throughout the year, more intense during winter and spring, and that O. <span class="hlt">niloticus</span> is a phyto-planktophagus species. There were no indications that this species is being overfished, we therefore recommend that, due to its exotic condition, no restrictions need to be taken on its <span class="hlt">fishing</span> activities. PMID:23894941</p> <div class="credits"> <p class="dwt_author">Novaes, José Luís Costa; Carvalho, Edmir Daniel</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">269</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/11781"> <span id="translatedtitle">Quantification of fatty acids in tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different sources of vegetable oilsQuantificação de ácidos graxos de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentados com diferentes fontes de óleos vegetais</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The present work aimed to quantify the fatty acids in total lipids of Nile tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed with different sources of vegetable oils mechanically extracted. Were used 320 tilapias (O. <span class="hlt">niloticus</span> with average initial weight and average total initial length of 2.55±0.57 g and 5.59±0.43 cm, respectively, fed for a period of 60 days, in a randomized block design with eight treatments and four replications. The diets were prepared with 320 g/kg crude protein and 3.500 kcal of digestible energy per kg of feed enriched with eight different oils: sunflower, canola, sesame, linseed, peanut, Para’s nut soy and macadamia, with an addition of 4%. Among the major fatty acids the oleic, palmitic, linolenic and linoleic were obtained in higher concentration (mg/g of LT in <span class="hlt">fish</span> from all treatments. The sums of polyunsaturated fatty acids after 60 days of cultivation had increased in all treatments compared to the 30 days of the experiment. This is due to the addition of oils with high contents of n-6 and n-3 fatty acids. The fatty acids in the carcass are a reflection of the energy source of oil used. As a conclusion it is recommended the use of linseed oil in the diet of tilapia fingerlings due to great improvement in the relationship between n-6/n-3. O presente trabalho teve como objetivo quantificar os ácidos graxos nos alevinos de tilápias do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentadas com diferentes fontes de óleos vegetais extraídos mecanicamente. Foram utilizadas 320 tilápias com peso inicial médio e comprimento total inicial médio de 2,55±0,57 g e 5,59±0,43 cm, respectivamente, alimentados por um período de 60 dias, num delineamento em blocos casualizados com oito tratamentos e quatro repetições. As rações foram elaboradas com 320 g/ kg proteína bruta (PB e 3.500 kcal de energia digestível (ED por kg de ração, enriquecidas com oito diferentes óleos: girassol, canola, gergelim, linhaça, amendoim, castanha do Pará, soja e macadâmia, com uma inclusão de 4%. Dentre os ácidos graxos majoritários o oléico, palmítico, linolênico e linoléico foram os obtidos em maior concentração (mg/g de LT nos peixes em todos os tratamentos. As somatórias dos ácidos graxos poliinsaturados aos 60 dias de cultivo apresentaram aumento em todos os tratamentos em comparação aos 30 dias de experimento. Isto se deve a adição dos óleos com alto conteúdo de ácidos graxos n-6 e n-3 nas rações. Os ácidos graxos na carcaça são o reflexo da fonte energética de óleo utilizada. Como conclusão recomenda-se o uso do óleo de linhaça na alimentação de alevinos de tilápias, devido à grande melhoria na razão entre n-6/n-3.</p> <div class="credits"> <p class="dwt_author">Leticia Hayashi Higuchi</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">270</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8510/8510"> <span id="translatedtitle">Growth performance of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, fingerlings reared in Na2CO3 limed waters = Desempenho produtivo de alevinos de tilápia nilótica, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, em aquários submetidos à calagem com Na2CO3</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Current experiment was undertaken during 6 weeks with Nile tilapia,Oreochomis <span class="hlt">niloticus</span>, fingerlings (1.28 . 0.03 g to assess the effects of moderate Na2CO3 liming on water quality and <span class="hlt">fish</span> growth performance. Twenty-four 25 L-aquaria, with 15 <span class="hlt">fish</span> per aquarium, were used, of which twelve aquaria were placed in the lab’s indoor room and twelve in the outdoor area. Two types of water (clear or green and three different water-quality managements (none, HCl acidification and Na2CO3 liming were simultaneously evaluated in a 3 x 2 factorial design. Total ammonia, calcium hardness, pH and total alkalinity in the green water aquaria were significantly higher than rates in the clear water aquaria. Slight liming acid water with Na2CO3 did not produce any significant effect on its water calcium hardness. No significant differences between controls and theexperimental group were observed for any growth variables. Lime rearing water with Na2CO3 has no significant effect on tilapia growth performance if the initial total alkalinity of water is higher than 20 mg CaCO3 L-1.O presente estudo foi realizado por seis semanas com alevinos de tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (1,28 . 0,03 g, para avaliar os efeitos da calagem moderada da água de cultivo com Na2CO3 naqualidade da água e no desempenho produtivo dos peixes cultivados. Vinte e quatro aquários de polietileno de 25 L foram utilizados para manter os peixes experimentais (15 peixes por aquário. Doze aquários foram instalados na sala interna do laboratório e 12 aquários na área externa. Dois tipos de águas (claras, sem fitoplâncton ou verdes,ricas em fitoplâncton e três diferentes manejos de qualidade de água (nenhum, acidificação com HCl ou calagem com Na2CO3 foram avaliados simultaneamente em delineamento fatorial 3 x 2. A concentração de amônia total, dureza cálcica, pH e alcalinidade total das águas verdes foram significativamente maiores que para as águas claras. A calagem das águas fracamente ácidas com Na2CO3 não produziu nenhumefeito significativo na dureza cálcica da água. Não se observaram diferenças significativas entre os grupos-controle e o grupo experimental para nenhuma das variáveis de desempenho produtivo observadas. Concluiu-se que fazer a calagem da água de cultivo de tilápias com Na2CO3 não trará nenhum benefício ao desempenho zootécnico dos peixes se a alcalinidade inicial da água exceder 20 mg L-1 de CaCO3.</p> <div class="credits"> <p class="dwt_author">Davi de Holanda Cavalcante</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-07-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">271</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24657260"> <span id="translatedtitle">Effects of dietary Astragalus polysaccharides (APS) on growth performance, immunological parameters, digestive enzymes, and intestinal morphology of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">This work investigated the potential immunomodulatory and growth-promoting effects of Astragalus polysaccharides (APS) in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). The dietary supplementation with APS (1500 mg/kg of diet) caused a significant increase in growth parameters (initial and final weight, weight gain (WG), specific growth rate (SGR), feed conversion ratio (FCR) and feed intake (FI), when compared to non-supplemented control basal diet. In addition, APS upregulated the phagocytic activity, the respiratory burst activity, plasma lysozyme, the bactericidal activity, superoxide dismutase (SOD), glutathione peroxidase (GPx), and amylase activity. However, it had no effect on serum nitric oxide (NO) or Malondialdehyde (MDA) levels. While APS had no effect of intestinal histology, a slight increase in the villi length was recorded. Collectively, our results indicate that dietary APS supplementation could improve the growth performance and the immune parameters of cultured tilapia <span class="hlt">fish</span>. PMID:24657260</p> <div class="credits"> <p class="dwt_author">Zahran, Eman; Risha, Engy; Abdelhamid, Fatma; Mahgoub, Hebata Allah; Ibrahim, Tarek</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-05-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">272</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9971"> <span id="translatedtitle">Ontogenetic diet shifts of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Tilapia rendalli of the Barra Bonita reservoir (Tietê river, São Paulo State, Brazil - doi: 10.4025/actascibiolsci.v34i3.9971</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, and the Congo Tilapia, Tilapia rendalli, are important members of the African cichlids, and have been introduced to many Brazilian lakes and reservoirs. These species exhibit a large feeding flexibility and may modify their habits during their growth. In the Barra Bonita reservoir, these species are well adapted, representing more than 80% of <span class="hlt">fish</span>. This study aimed to analyze ontogenetic variation with regard to the diet of these species in this important reservoir. Samples were taken monthly, from March 2007 to February 2008, in Anhembi, São Paulo State. Both species were analyzed by grouping individuals according to size classes. The coexistence of these species was observed in this environment, to which <span class="hlt">fish</span> were introduced, as well as discreet differences in diet, being that <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was considered as an detritivorous, since the detritus was constant in the diet of almost all size classes, and presents some changes in its diet according to the different size classes. While T. rendalli may was defined as herbivorous, and the contribution of food resources to the diet of T. rendalli seems to be different from that of O. <span class="hlt">niloticus</span> along the size classes. </p> <div class="credits"> <p class="dwt_author">Edmir Daniel Carvalho</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">273</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-29522013000200004&lang=en"> <span id="translatedtitle">EFECTO DE LA INCLUSIÓN DE DIFERENTES FUENTES DE LÍPIDOS SOBRE PARÁMETROS PRODUCTIVOS Y COMPOSICIÓN PROXIMAL DEL FILETE DE TILAPIA NILÓTICA -<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>- CULTIVADA EN JAULAS FLOTANTES / EFFECT OF THE INCLUSION OF DIFFERENT LIPID SOURCES ON GROWTH PERFORMANCE AND PROXIMATE COMPOSITION OF NILE TILAPIA FILLET -<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>- REARED IN FLOATING CAGES</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Colombia | Language: Spanish Abstract in spanish Para evaluar el efecto de la inclusión de diferentes fuentes de lípidos sobre el comportamiento productivo y la composición proximal del filete de tilapia nilótica <span class="hlt">Oreo-chromis</span> <span class="hlt">niloticus</span>, se formularon cuatro dietas con aceite de pescado (AP), aceite de palma (APL), semilla de chía (SC) o semilla de [...] lino (SL). El experimento fue realizado durante 45 días en la represa de Betania (Huila, Colombia), en 20 jaulas flotantes, cada una con 504 peces con peso promedio de 557±16,87 g, distribuidos bajo un diseño experimental completamente al azar. Adicionalmente se llevó a cabo un estudio de presupuestos parciales, con el fin de verificar el margen bruto de ingreso parcial (MBIP) obtenido con las diferentes dietas. Se observaron diferencias significativas (P Abstract in english In order to evaluate the effect of inclusion of different lipid sources on growth performance and proximate composition of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fillet, four diets were manufactured with: <span class="hlt">fish</span> oil (FO), palm oil (PO), chia seeds (CS) or flaxseeds (FS). The experiment was conducted for 4 [...] 5 days at Betania reservoir (Huila), in 20 floating completely randomized experimental design. In Addition, an economical partial budget analysis was run to establish the partial gross marginal income (PGMI) obtained with the different diets. Significant differences (P</p> <div class="credits"> <p class="dwt_author">J. M, Moreno; A. P, Muñoz; G. A, Wills.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">274</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442012000200017"> <span id="translatedtitle">Reproduction, food dynamics and exploitation level of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciformes: Cichlidae from artisanal fisheries in Barra Bonita Reservoir, Brazil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, which is exotic to South America, is the most common species caught in artisanal fisheries at the Barra Bonita Reservoir, Southeastern Brazil. This species is of great socioeconomic importance for the region and keeps active a population of about 500 fishers. In the present study we assess reproduction, food dynamics and level of exploitation of O. <span class="hlt">niloticus</span>, caught by artisanal fisheries in the Barra Bonita Reservoir. Specimens were collected monthly, from July 2004-June 2005, and a total of 1 715 specimens were analyzed. Each specimen was examined to obtain biological and biometric data: standard length (cm, total weight (g, reproductive data (sex and stage of maturation, and stomach contents (empty, partly full, and full. We also estimated the sex ratio (by macroscopic observation of gonads, reproductive period (by ovarian development and seasonal average of gonadosomatic index in females, and feeding habits (by stomach contents. The possible relationship between abiotic factors and the reproductive period was statistically verified using Spearman’s Rank Correlation. The FiSAT (ELEFAN I package was used to assess growth parameters, mortality rates and to infer exploitation rate from standard length frequencies. The O. <span class="hlt">niloticus</span> population had a sex ratio of 1.3:1 (M:F. Results indicated that ripe females were captured throughout the year, with a higher frequency during the winter-2004 (with a frequency of 59%, at a mean temperature of 20.5°C, and in spring-2004 (with a frequency of 60.5% at a mean temperature of 21.18°C. The GSI mean values obtained by season were: winter-2004: 1.71; spring-2004: 1.72; summer-2005: 0.80, and autumn-2005: 1.19. The Spearman correlation indicated positive values with respect to pH, dissolved oxygen, electric conductivity, transparency and chlorophyll a, and negative values with respect to temperature, accumulated rainfall and altimetric benchmark. The main food items were phytoplankton and periphytic algae, observed in 99.6% of the analyzed stomachs. The estimated growth and mortality parameters were: L?=33.60cm, k=0.63/year, longevity= 4.76years, Z=2.81/ year, M=1.20/year and F=1.61/year. The weight-length relationship was Ln Wt=-2.8532+2.8835 Ln Lp. The estimated yield per recruit values were as follows: E=0.570, Emax=0.776, E0.1=0.604 and E0.5=0.349. These results indicate that a well established population of O. <span class="hlt">niloticus</span> is present at Barra Bonita Reservoir; with an active reproduction throughout the year, more intense during winter and spring, and that O. <span class="hlt">niloticus</span> is a phytoplanktophagus species. There were no indications that this species is being overfished, we therefore recommend that, due to its exotic condition, no restrictions need to be taken on its <span class="hlt">fishing</span> activities. Rev. Biol. Trop. 60 (2: 721-734. Epub 2012 June 01.La exótica tilapia del Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> es la especie mayormente capturada en la pesquería artesanal del embalse de Barra Bonita, sudeste de Brasil, de gran importancia socioeconómica para la región y para una población de unos 500 pescadores. El estudio analizo: la reproducción, la dinámica alimentaria y la explotación de O. <span class="hlt">niloticus</span>, la cual fue capturada en la pesquería del embalse de Barra Bonita. Asimismo, se tomaron muestras mensuales y se analizo un total de 1 715 animales desde julio-2004 a junio-2005. De cada espécimen, se obtuvieron los siguientes datos biológicos y biométricos: longitud estándar (cm, peso total (g, datos reproductivos (sexo y estadio de maduración, contenido estomacal (vacio, parcialmente lleno y lleno. Estos datos fueron utilizados para estimar la proporción de sexo (a través de la observación macroscópica de las gónadas, el periodo reproductivo (a través de la distribución de la frecuencia de los estadios macroscópicos del desarrollo de los ovarios, y la media de la proporción del índice gonadosomático IGS de hembras, así como los hábitos alimentarios (a través de la observación del contenido estomacal. Para verificar </p> <div class="credits"> <p class="dwt_author">José Luis Costa Novaes</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">275</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://dx.doi.org/10.1051/kmae:2007012"> <span id="translatedtitle">APPORTS RELATIFS EN NOURRITURES NATURELLE ET ARTIFICIELLE DANS L’ALIMENTATION DU TILAPIA <span class="hlt">OREOCHROMIS</span> <span class="hlt">NILOTICUS</span> EN CAPTIVITE RELATIVE CONTRIBUTIONS OF NATURAL AND SUPPLEMENTAL FOOD IN NILE TILAPIA <span class="hlt">OREOCHROMIS</span> <span class="hlt">NILOTICUS</span> FEEDING IN CAPTIVITY</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Des études sur le rythme alimentaire, la ration alimentaire journalière et la quantité des nourritures naturelles et artificielles consommées ont été réalisées chez des populations d’alevins (6 g, de juvéniles (30 g et d’adultes (250 g d’<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. L’échantillonnage a été effectué toutes les 3 heures, sur deux cycles de 24h dans 4 bassins bétonnés (alevins et dans 8 étangs (juvéniles et adultes. Le contenu des estomacs a été analysé. Les poids frais du contenu des estomacs ont été traités par le logiciel MAXIMS pour déterminer les taux d’ingestion, d’évacuation et la ration alimentaire journalière. Les courbes de la prise de nourritures présentent deux pics montrant une activité alimentaire périodique et diurne. En dehors des périodes de nourrissage (9h et 15h, le contenu des estomacs est composé majoritairement d’aliments naturels chez les alevins et juvéniles. En revanche, chez les adultes, les nourritures apportées sont plus abondantes entre 9 h et 24 h. En dehors de cette période, le bol alimentaire est constitué presque uniquement de nourritures naturelles chez toutes les populations des poissons prélevés. Les rations alimentaires distribuées quotidiennement estimées sont de 10 % ; 6,7 % et 3,7 % du poids corporel respectivement chez les alevins, les juvéniles et les adultes. Dans ce même ordre des populations indiquées, les nourritures naturelles consommées ont été approximativement de 4 %, 2,31 % et 1 % contre 6, 4,45 et 2,7 % pour l’aliment artificiel. Studies on feeding periods, daily ration and relative artificial and natural food consumption in populations of juveniles (6 g, sub-adult (30 g and adults (250 g of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were realized. Sampling took place over two 24-hour cycles in four concrete basins (juvenile and eight ponds (sub-adult and adult. <span class="hlt">Fish</span> were caught at three hourly intervals. Stomach contents of different populations were microscopically analysed. The gut content weights were submitted to the feeding model MAXIMS to determine the ingestion, evacuation rates and daily ration. Two peak feeding periods were evident. The <span class="hlt">fish</span> showed diurnal diel feeding periodicity. Outside the food distribution periods (9 h and 15 h, the gut contents were mostly composed of natural food in juvenile and sub-adult populations. In addition, in adult population, artificial food was more important from 9 h to 24 h. outside this period, the gut content in each <span class="hlt">fish</span> population was only constituted of natural food. The daily rations were about 10 %, 6.7 % and 3.7 % respectively for the juvenile, sub-adult and the adult. In that order, the consumed natural food represented 4 % 2.3 % and 1 %. Respective values of the artificial food estimated were 6 %, 4.45 % and 2.7 % for the juvenile, sub-adult and the adults.</p> <div class="credits"> <p class="dwt_author">BAMBA Y.</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">276</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/21410563"> <span id="translatedtitle">Jatropha platyphylla kernel meal as feed ingredient for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.): growth, nutrient utilization and blood parameters.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Jatropha platyphylla is a multipurpose and drought-resistant shrub, available in Mexico, locally known as 'sangregrado' and belonging to the family Euphorbiaceae. Its seeds are rich in oil and protein and do not contain the main toxin, phorbol esters present in other Jatropha species. Jatropha platyphylla kernel meal (JPKM) obtained after oil extraction contained 70-75% crude protein (CP); however, it contained phytate, lectin and trypsin-inhibitor. The levels of essential amino acids (except lysine) were higher in JPKM than in soybean meal (SBM). Using Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fingerlings a 12-week experiment was conducted to evaluate the nutritional quality of the heated JPKM and compare with that of SBM and fishmeal. Fingerlings (15 <span class="hlt">fish</span>; average weight 13.7 ± 0.21g) were randomly distributed in three treatment groups with five replicates. <span class="hlt">Fish</span> were fed three isonitrogenous diets (CP 36%): control diet containing fishmeal-based protein and two other diets replacing 62.5% fishmeal protein with JPKM (Jatropha group) and SBM (Soybean group). The growth performance, feed conversion ratio, protein efficiency ratio, protein productive and energy retention did not differ significantly among the three groups. A lower apparent lipid conversion was observed in the plant protein-fed group than in the control group. RBC count, haematocrit and blood glucose contents were higher in plant-protein fed groups than control group. Other haematological parameters (WBC count, haemoglobin, mean cell volume: calcium and sodium ions, total bilirubin and urea-nitrogen in the blood) and metabolic enzymes (alkaline phosphatase and alanine transaminase) activities in blood did not differ significantly among the three groups. The results from the present study established that JPKM is a promising and good quality protein source for Nile tilapia feed. PMID:21410563</p> <div class="credits"> <p class="dwt_author">Akinleye, A O; Kumar, V; Makkar, H P S; Angulo-Escalante, M A; Becker, K</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">277</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000600039"> <span id="translatedtitle">Desempenho produtivo e digestibilidade pela tilápia do NILO (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linnaeus, 1758 alimentada com dietas suplementadas com níveis crescentes de silagem ácida de pescado Yielo and digestibility performance by the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Linnaeus, 1758 fed with diets with increasing levels of acid silage of <span class="hlt">fishing</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Conduziram-se estes experimentos para avaliar os coeficientes de digestibilidade aparente dos nutrientes e da energia bruta da silagem ácida de resíduos da filetagem de tilápias e o desempenho produtivo da tilápia alimentada com dietas contendo (0, 10, 20, 30 e 40% da silagem ácida em substituição à farinha de peixe. Na digestibilidade foram utilizados 200 alevinos revertidos sexualmente, com peso médio de 5,0 g e acondicionados em aquários de 40 litros. A coleta de fezes foi feita por metodologia indireta, utilizando-se 1,0% de Cr2O3 como indicador, incorporado à ração. No desempenho foram utilizados 2000 alevinos de tilápia nilótica, com peso médio inicial de 0,525g, acondicionados em hapas de 1m², dispostos em 1 viveiro escavado. As variáveis analisadas foram: ganho de peso final (GPF, consumo de ração total (CRT, conversão alimentar aparente (CAA e acréscimo em comprimento (AC. O delineamento experimental foi o inteiramente casualizado, com cinco tratamentos e quatro repetições. Os valores de digestibilidade encontrados foram: coeficiente de digestibilidade aparente da matéria seca (CDA, 95,5%; CDA da proteína bruta, 96,7%; CDA do extrato etéreo, 97,2% e CDA da energia bruta, 95,4%. Não houve diferença significativa no consumo de ração total. Observou-se efeito quadrático para ganho de peso final, conversão alimentar aparente e acréscimo em comprimento. Conclui-se que este alimento pode ser eficientemente utilizado pela tilápia nilótica.The experiments were carried out in order to evaluate the apparent digestibility coefficients of the nutrients and gross energy of acid silage of filetage residues of the Nile tilapia. The treatments were based on the increasing levels (0, 10, 20, 30, 40% of the acid silage by substitution of <span class="hlt">fish</span> meal in the diets. In the digestibility assay a total of 200 sexually inverted juveniles were used. The average weight was 2.0 g and were kept in 40 liter aquariums. Feces collect was made during seven subsequent days and the apparent digestibility coefficients and apparent digestible energy were determined by indirect method, using 1.0% of Cr(20(3 as an indicator. In the performance assay 2000 sexually inverted juveniles were used, with average weight of 0.45g, kept in 1m² hapas, in a <span class="hlt">fish</span> crawl. The analyzed variables were: final weight (FWG, total feed intake (TFI, apparent feed conversion (AFC and length increase (LI. The randomized outline was used with five treatments and four repetitions. The values for apparent digestibility were: apparent digestibility coefficient of dry matter, 95.49%; apparent digestibility coefficient of gross protein, 96.66%; apparent digestibility coefficient of ether extract, 97.18%; apparent digestibility coeficient of gross energy, 95.44%. There was no significant difference (P>0.05 for total feed intake (TFI. One observed a quadratic effect (P<0.01 in the final weight (FWG, apparent feed conversion (AFC and length increase. One concluded that the acid silage of filetage residues should be efficiently used by the Nile tilapia.</p> <div class="credits"> <p class="dwt_author">Maria Emília de Sousa Gomes Pimenta</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">278</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24291634"> <span id="translatedtitle">Histopathological and immunohistochemical analysis of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) exposed to cylindrospermopsin and the effectiveness of N-Acetylcysteine to prevent its toxic effects.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Cylindrospermopsin (CYN) is a cytotoxic cyanotoxin produced by several cyanobacteria species. It has been demonstrated that CYN is a potent protein and glutathione synthesis inhibitor, and induces genotoxicity and oxidative stress. The present study investigated the protective role of two different doses of N-Acetylcysteine (NAC) (22 and 45 mg/<span class="hlt">fish</span>/day) against the pathological changes induced in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) orally exposed to a single dose of pure CYN or CYN from an Aphanizomenon ovalisporum CYN-producer strain (200 ?g/kg of CYN in both cases). Moreover, an immunohistochemical (IHC) analysis was carried out in order to elucidate the CYN distribution in exposed <span class="hlt">fish</span>. The histological findings were more pronounced when <span class="hlt">fish</span> were intoxicated with CYN from the cyanobacterial strain, being liver and kidney the main targets for CYN toxicity. NAC pre-treatment was effective reducing the damage induced by CYN, especially at the highest dose employed (45 mg/<span class="hlt">fish</span>/day), with a total prevention in all organs. The IHC analysis showed that CYN-antigen appeared mainly in the liver and gastrointestinal tract, although it was also present in kidney and gills. In this case, the immunopositive results were more abundant in those <span class="hlt">fish</span> exposed to pure CYN. NAC reduced the number of immunopositive cases in a dose-dependent way. Therefore, NAC can be considered a useful chemoprotectant in the prophylaxis and treatment of CYN-related intoxications in <span class="hlt">fish</span>. PMID:24291634</p> <div class="credits"> <p class="dwt_author">Gutiérrez-Praena, D; Risalde, M A; Pichardo, S; Jos, A; Moyano, R; Blanco, A; Vasconcelos, V; Cameán, A M</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">279</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000600002&lang=en"> <span id="translatedtitle">Farinhas de peixe, carne e ossos, vísceras e crisálida como atractantes em dietas para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / <span class="hlt">Fish</span>, meat and bone, poultry by-products and silkworm meals as attractive in diets for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese O experimento foi conduzido com o objetivo de comparar a utilização de 5% de inclusão das farinhas de peixe (FP), vísceras (FV), carne e ossos (FO), crisálida (FC) e controle (farelo de soja e milho) como atractantes sobre o consumo de ração e desempenho de alevinos tilápia do Nilo. Foram utilizados [...] 168 alevinos de tilápia do Nilo (linhagem tailandesa) revertidos sexualmente, com peso inicial médio de 0,72 ± 0,18g, distribuídos em um delineamento experimental inteiramente casualizado, com cinco tratamentos e cinco repetições, sendo a unidade experimental constituída por um aquário de 50 L com sete animais. As rações foram formuladas com 32% de proteína bruta e 3000 kcal de energia digestível/kg, sendo as mesmas isoprotéicas, isocalóricas, isofíbricas e isoaminoacídicas para lisina e metionina + cistina. Os valores médios de ganho de peso observados nos tratamentos controle ou com FV e FP como atractantes foram superiores aos dos tratamentos FC ou FO. A conversão alimentar dos animais alimentados com ração contendo FV foi melhor que os tratamentos FC ou FO, porém não diferiu significativamente dos tratamentos controle e FP. O comprimento final médio dos animais do tratamento controle foi superior, quando comparados ao tratamento FC, não diferindo dos demais. O consumo alimentar e a taxa de sobrevivência não diferiram entre os tratamentos. Concluiu-se que não seria necessária a utilização dos alimentos testados, a 5% de inclusão, para estimular o consumo alimentar ou promover o crescimento de alevinos de tilápia do Nilo. Abstract in english The experiment aimed to compare the use of 5% of inclusion of <span class="hlt">fish</span> meal (FP), poultry by-products meal (FV), meat and bones meal (FO) and silkworm meal (FC) and a control (soybean meal and corn) as atractants on feed intake and performance of Nile tilapia fingerlings. One hundred and sixty eight Nil [...] e tilapia fingerlings (Thai strain) sexually reversed, with average initial weight of 0.72 ± 0.18 g were assigned to a completely randomized experimental design, with five treatments and five replications, where the experimental unit was constituted of a 50 L aquarium with seven animals. The diets were formulated with 32% of crude protein and 3000 kcal of digestible energy/kg, and were isoprotein, isoenergy, isofiber and isoaminoacid for lysine and methionine + cystine. Average values of weight gain in the control or FV and FP treatments as atractant were higher than the FC or FO treatments. Feed:gain ratio of the animals fed ration with FV was better than FC or FO treatment, however they did not differ significantly from the control and the FP treatments. Average animal final size fed the control treatment was higher than the FC treatment and did not differ from the others. Feed intake and survival rate did not differ among the treatments. It was concluded that it's not necessary to include the evaluated feeds, at a level of 5%, to estimulate feed intake or to promote Nile tilapia fingerlings growth.</p> <div class="credits"> <p class="dwt_author">Wilson Rogério, Boscolo; Carmino, Hayashi; Fábio, Meurer; Claudemir Martins, Soares.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">280</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000600002"> <span id="translatedtitle">Farinhas de peixe, carne e ossos, vísceras e crisálida como atractantes em dietas para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> <span class="hlt">Fish</span>, meat and bone, poultry by-products and silkworm meals as attractive in diets for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O experimento foi conduzido com o objetivo de comparar a utilização de 5% de inclusão das farinhas de peixe (FP, vísceras (FV, carne e ossos (FO, crisálida (FC e controle (farelo de soja e milho como atractantes sobre o consumo de ração e desempenho de alevinos tilápia do Nilo. Foram utilizados 168 alevinos de tilápia do Nilo (linhagem tailandesa revertidos sexualmente, com peso inicial médio de 0,72 ± 0,18g, distribuídos em um delineamento experimental inteiramente casualizado, com cinco tratamentos e cinco repetições, sendo a unidade experimental constituída por um aquário de 50 L com sete animais. As rações foram formuladas com 32% de proteína bruta e 3000 kcal de energia digestível/kg, sendo as mesmas isoprotéicas, isocalóricas, isofíbricas e isoaminoacídicas para lisina e metionina + cistina. Os valores médios de ganho de peso observados nos tratamentos controle ou com FV e FP como atractantes foram superiores aos dos tratamentos FC ou FO. A conversão alimentar dos animais alimentados com ração contendo FV foi melhor que os tratamentos FC ou FO, porém não diferiu significativamente dos tratamentos controle e FP. O comprimento final médio dos animais do tratamento controle foi superior, quando comparados ao tratamento FC, não diferindo dos demais. O consumo alimentar e a taxa de sobrevivência não diferiram entre os tratamentos. Concluiu-se que não seria necessária a utilização dos alimentos testados, a 5% de inclusão, para estimular o consumo alimentar ou promover o crescimento de alevinos de tilápia do Nilo.The experiment aimed to compare the use of 5% of inclusion of <span class="hlt">fish</span> meal (FP, poultry by-products meal (FV, meat and bones meal (FO and silkworm meal (FC and a control (soybean meal and corn as atractants on feed intake and performance of Nile tilapia fingerlings. One hundred and sixty eight Nile tilapia fingerlings (Thai strain sexually reversed, with average initial weight of 0.72 ± 0.18 g were assigned to a completely randomized experimental design, with five treatments and five replications, where the experimental unit was constituted of a 50 L aquarium with seven animals. The diets were formulated with 32% of crude protein and 3000 kcal of digestible energy/kg, and were isoprotein, isoenergy, isofiber and isoaminoacid for lysine and methionine + cystine. Average values of weight gain in the control or FV and FP treatments as atractant were higher than the FC or FO treatments. Feed:gain ratio of the animals fed ration with FV was better than FC or FO treatment, however they did not differ significantly from the control and the FP treatments. Average animal final size fed the control treatment was higher than the FC treatment and did not differ from the others. Feed intake and survival rate did not differ among the treatments. It was concluded that it's not necessary to include the evaluated feeds, at a level of 5%, to estimulate feed intake or to promote Nile tilapia fingerlings growth.</p> <div class="credits"> <p class="dwt_author">Wilson Rogério Boscolo</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-10-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_13");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a style="font-weight: bold;">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_15");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">281</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000200003"> <span id="translatedtitle">Effects of Garlic (Alliumsativum and chloramphenicol on growth performance, physiological parameters and survival of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available We studied and compared the effects of chloramphenicol antibiotic and garlic (Allium sativum, used as immunostimulants and growth promoters, on some physiological parameters, growth performance, survival rate, and bacteriological characteristics of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. <span class="hlt">Fish</span> (7±1g/<span class="hlt">fish</span> were assigned to eight treatments, with three replicates each. Treatment groups had a different level of Allium sativum (10, 20, 30, and 40g/kg diet and chloramphenicol (15, 30, and 45mg/kg diet added to their diets; the control group diet was free from garlic and antibiotic. Diets also contained 32% crude protein (CP and were administered at a rate of 3% live body weight twice daily for 90 days. Results showed that the final weight and specific growth rate (SGR of O. <span class="hlt">niloticus</span> increased significantly with increasing levels of Allium sativum and chloramphenicol. The highest growth performance was verified with 30g Allium sativum / kg diet and 30mg chloramphenicol / kg diet. The lowest feed conversion ratio (FCR was observed with 30g Allium sativum / kg diet and 30mg chloramphenicol / kg diet. There were significant differences in the protein efficiency ratio (PER with all treatments, except with 45mg chloramphenicol / kg diet. No changes in the hepatosomatic index and survival rate were observed. Crude protein content in whole <span class="hlt">fish</span> increased significantly in the group fed on 30g Allium sativum / kg diet, while total lipids decreased significantly in the same group. Ash of whole <span class="hlt">fish</span> showed significantly high values with 30g Allium sativum and 15mg chloramphenicol / kg diet while the lowest value was observed in the control group. Blood parameters, erythrocyte count (RBC, and hemoglobin content in <span class="hlt">fish</span> fed on diets containing 40g Allium sativum and all levels of chloramphenicol were significantly higher than in control. Significantly higher hematocrit values were seen with 30 and 45mg chloramphenicol / kg diet. There were no significant differences in the mean corpuscular volume (MCV and mean corpuscular hemoglobin concentration (MCHC. Plasma glucose decreased significantly with increasing levels of Allium sativum but increased significantly with increasing levels of chloramphenicol. Total lipids were significantly reduced with diets containing 40g Allium sativum and 30mg chloramphenicol / kg diet, while total plasma protein content was significantly higher in <span class="hlt">fish</span> fed on diets containing 10, 20, and 30g Allium sativum, and 30 and 45mg chloramphenicol / kg diet. Aspartate aminotransferase (AST and alanine aminotransferase (ALT activities in plasma decreased significantly with increasing levels of Allium sativum and chloramphenicol. All Allium sativum and chloramphenicol levels decreased total bacteria and coliforms in water, muscles and intestine when compared to the control group. Treated groups had lower mortality rate than the control group during the challenge test. In conclusion, it can be suggested that adding 3% Allium sativum to <span class="hlt">fish</span> diet can promote growth, reduce total bacteria, and improve <span class="hlt">fish</span> health.</p> <div class="credits"> <p class="dwt_author">A. M. Shalaby</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">282</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300008&lang=en"> <span id="translatedtitle">Descripción Anatómica, Histológica y Ultraestructural de la Branquia e Hígado de Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) / Anatomical, Histological and Ultraestructural Description of the Gills and Liver of the Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Chile | Language: Spanish Abstract in spanish La tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) es un pez presente en muchos ecosistemas de agua dulce, en diversas regiones de Colombia. Esta especie es una fuente de alimentación de alta demanda de la población en general, por lo cual es de gran interés que su hábitat acuícola estélibre de contaminantes, con e [...] l fin que el especimen se desarrolle y crezca normalmente y asípueda ser consumido por el ser humano sin ningún perjuicio. Las branquias y el hígado de peces son considerados como los órganos primarios donde detectar efectos de polución. Este estudio muestra la morfología normal de las branquias e hígado de tilapia, a través de microscopías: de luz, óptica de alta resolución (MOAR), electrónica de transmisión (TEM) y de barrido (MEB); como un estudio básico para futuras investigaciones, en las cuales se puedan comparar tejidos sanos y tejidos expuestos a contaminantes ambientales; por lo cual, este análisis podría ser utilizado como referente para la aplicación como biomarcador histopatológico de estrés ambiental. Para esta investigación se recolectaron especímenes en un afluente del Río Patía (Departamento del Cauca). Sacrificado el animal, se disecó el arco branquial izquierdo y el hígado. Las biopsias se fijaron con las técnicas estándares para microscopías de luz y electrónica. En los cortes obtenidos se observa la organización en forma detallada de los diferentes tejidos que componen a las branquias y al hígado de especímenes sanos. Abstract in english The tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) is a <span class="hlt">fish</span> that can be found in many of the sweet water ecosystems throughout various regions of Colombia. This species is a high demand food source for the population in general and therefore it is important that its aquaculture habitat remains free of contaminati [...] ng pollutants, in order that the species develop and grow normally for adequate human consumption. The branchia and the liver of <span class="hlt">fish</span> are considered the primary organs wherein the effects of pollution can be detected. This study shows the normal morphology of the branquia and the liver of the tilapia through light microscopy, high resolution optical microscopy , electronic transmission microscopy, and electronic scanning microscopy, as basic research for future investigation in which healthy tissue and tissue exposed to environmental pollutants can be compared. This analysis is thus used as reference for the application as a histopathological marker of environmental stress. For purposes of this research specimens of a tributary of the Patia river (Departamento de Cauca) were collected. The animal was sacrificed, the left branquial arch and the liver were dissected; the biopsies were set for standard light microscopy as well as electronic microscopy. The organization is shown in detail in the slices obtained in the different tissue which compose the branquia and the liver of healthy specimen.</p> <div class="credits"> <p class="dwt_author">G. A, Torres R; S, González P; E, Peña S.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">283</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::fc971bb74e262fead2a9dc041073b9cc"> <span id="translatedtitle">The Role of Spirulina platensis (Arthrospira platensis) in Growth and Immunity of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and Its Resistance to Bacterial Infection</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">The current study was designed to optimize the dietary levels of Spirulina platensis in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>; this was tested via graded levels. Six isonitrogenous and isocaloric rations containing graded levels of dried spirulina 0, 5, 7.5, 10, 15 and 20 g/kg diet were fed separately to six equal groups of O. <span class="hlt">niloticus</span> fingerlings for 3 months. Growth performance, non-specific immune parameters, tissue reactions and resistance of tilapias post cha...</p> <div class="credits"> <p class="dwt_author">Ibrahem, Mai D.; Mohamed, Mohamed F.; Ibrahim, Marwa A.</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">284</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______642::1d62fac9857500892fb21d4604218854"> <span id="translatedtitle">A qualitative ecological risk assessment of the invasive Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in a sub-tropical African river system (Limpopo River, South Africa)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">1. This study outlines the development of a qualitative risk assessment method and its application as a screening tool for determining the risk of establishment and spread of the invasive Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus, 1758), within the central sub-catchment of the Limpopo River basin in northern South Africa. 2. The assessment utilised known physiological tolerance limits of O. <span class="hlt">niloticus</span> in relation to minimum water temperature, presence or absence of dams, seasonality of ...</p> <div class="credits"> <p class="dwt_author">Zengeya, Tsungai Alfred; Robertson, Mark P.; Booth, Anthony J.; Chimimba, Christian Timothy</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">285</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::90e6956e52888ee2dc8875b81e7fb972"> <span id="translatedtitle">Massive Mortality Associated with <I>Streptococcus agalactiae</I> Infection in Cage-cultured Red Hybrid Tilapia <I><span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></I> in Como River, Kenyir Lake, Malaysia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Massive mortality of cage-cultured red hybrid tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Como River, Kenyir Lake, Malaysia was investigated. Moribund <span class="hlt">fish</span> showing erratic swimming, sluggishness and hemorrhagic eyes were collected for the study. Water quality parameters were measured on-site. The highest temperature was 32.70°C at the surface while lower temperature was 30.85°C at 6 m. Dissolved Oxygen (DO) was highest 7.05 mg L-1 at 4 m while lowest 6.15 mg L-1 at 1...</p> <div class="credits"> <p class="dwt_author">Najiah, M.; Aqilah, N. I.; Lee, K. L.; Khairulbariyyah, Z.; Mithun, S.; Jalal, K. C. A.; Shaharom-harrison, F.; Nadirah, M.</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">286</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22019311"> <span id="translatedtitle">Time-dependent histopathological changes induced in Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) after acute exposure to pure cylindrospermopsin by oral and intraperitoneal route.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Although <span class="hlt">fish</span> and aquatic organisms can be in contact with the cyanotoxin cylindrospermopsin (CYN), toxicological studies are practically nonexistent. CYN has a late and progressive acute toxicity in rodents, but no data have been reported in <span class="hlt">fish</span>. In this work, tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were exposed for the first time to an acute dose of CYN (200 ?g/kg <span class="hlt">fish</span>) by intraperitoneal (i.p.) injection, and the effects were compared with the oral route (gavage). In both cases, <span class="hlt">fish</span> were sacrificed after 24 h or 5 days of the toxin administration. CYN induced multiorganic damage, being the liver and kidney the main targets of toxicity. The histological findings were more pronounced after i.p. administration (in the liver, kidney, heart, gills) with the exception of the gastrointestinal tract. The time of sacrifice influenced the degree of histological damage in all organs studied, and was more severe after 5 d in comparison to 24 h. Moreover, CYN induced an increase in the average nuclear diameter of hepatocytes in the liver, and decreased cross sections of proximal and distal convoluted tubules in the kidney. The changes in these parameters were also more severe by i.p. route, and with the time of sacrifice, supporting the histopathological results obtained in these organs. Thus, both parameters could be useful for quantifying the extent of the damage in <span class="hlt">fish</span> after CYN exposure. PMID:22019311</p> <div class="credits"> <p class="dwt_author">Gutiérrez-Praena, Daniel; Jos, Angeles; Pichardo, Silvia; Moyano, Rosario; Blanco, Alfonso; Monterde, José G; Cameán, Ana M</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-02-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">287</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.publish.csiro.au/?paper=MF10207"> <span id="translatedtitle">Survival, growth and reproduction of non-indigenous Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus 1758). I. Physiological capabilities in various temperatures and salinities</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The physiological tolerances of non-native <span class="hlt">fishes</span> is an integral component of assessing potential invasive risk. Salinity and temperature are environmental variables that limit the spread of many non-native <span class="hlt">fishes</span>. We hypothesised that combinations of temperature and salinity will interact to affect survival, growth, and reproduction of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, introduced into Mississippi, USA. Tilapia withstood acute transfer from fresh water up to a salinity of 20 and survived gradual transfer up to 60 at typical summertime (30°C) temperatures. However, cold temperature (14°C) reduced survival of <span class="hlt">fish</span> in saline waters ?10 and increased the incidence of disease in freshwater controls. Although <span class="hlt">fish</span> were able to equilibrate to saline waters in warm temperatures, reproductive parameters were reduced at salinities ?30. These integrated responses suggest that Nile tilapia can invade coastal areas beyond their point of introduction. However, successful invasion is subject to two caveats: (1) wintertime survival depends on finding thermal refugia, and (2) reproduction is hampered in regions where salinities are ?30. These data are vital to predicting the invasion of non-native <span class="hlt">fishes</span> into coastal watersheds. This is particularly important given the predicted changes in coastal landscapes due to global climate change and sea-level rise.</p> <div class="credits"> <p class="dwt_author">Schofield, Pamela J.; Peterson, Mark S.; Lowe, Michael R.; Brown-Peterson, Nancy J.; Slack, William T.</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">288</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.bioflux.com.ro/docs/2013.%20180-187.pdf"> <span id="translatedtitle">Growth and economic performance of Nile Tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. fingerlings f ed diets containing grade d levels of s clerotium</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available This study was conducted to evaluate the effects of inclusion of sclerotium as a substitute forsoybean meal in the diet of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> using growth performance, economy of production,haematological and biochemical parameters as indices. Four experimental diets comprising of control(CTR without sclerotium and other three diets SC1, SC2 and SC3 containing 7.5, 10.0 and 12.5 %sclerotium, respectively. The experimental diets were fed to triplicate groups of <span class="hlt">fish</span> fingerlings (0.81±0.00g average body weight for 70 days. The inclusion of sclerotium at 7.5% level recorded the bestvalues for mean weight gain (MWG, specific growth rate (SGR and feed conversion ratio (FCR. Therewas no significant difference (p>0.05 in the incidence cost (IC and profit index (PI among the dietshowever, the best results were achieved at 10% (SC2 inclusion level. The parked cell volume (PCV,haemoglobin (Hb, neutrophil and lymphocyte showed significant difference (p0.05 in eosinophil among the four diets.Biochemical parameters recorded significant differences (pO. <span class="hlt">niloticus</span>.</p> <div class="credits"> <p class="dwt_author">Muyideen O . Lawa</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-05-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">289</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/8016636"> <span id="translatedtitle">Survival and heavy metal accumulation of two <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) strains exposed to mixtures of zinc, cadmium and mercury.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Two Nile tilapia strains of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) (Cichlidae, Teleostei) fingerlings were exposed to mixtures of zinc, cadmium and mercury. The two strains used were Chitralada or NIFI (originally from the National Inland Fisheries Institute, Thailand) and CLSU (from the Freshwater Aquaculture Center of the Central Luzon State University, The Philippines). Short-term (10 days) exposure to a metal mixture of 5 mg l-1 zinc (Zn), 0.5 mg l-1 cadmium (Cd) and 0.02 mg l-1 mercury (Hg) gave significantly higher survival percentage in the NIFI strain compared with the CLSU strain. Similar exposure conditions using larger and older fingerlings of the two strains also showed a slightly higher survival percentage in the NIFI strain but the difference was not significant. Prolonged exposure of the fingerlings to a lower concentration of the metal mixture (1.0 mg l-1 Zn, 0.1 mg l-1 Cd, 0.01 mg l-1 Hg) also resulted in similar survival percentages between the two strains at the end of the 60 days run. Whole body accumulation of Zn was significantly higher in CLSU than in NIFI after 14-day exposure to the low concentration metal mixture. There was no significant difference in the accumulation of Cd and Hg between the two strains. Of the three metals, Hg had the highest bioaccumulation factor (BF) which was approximately 900-1000, followed by Cd with 225-280 and Zn with 180-195 times the nominal concentration in the water. Concentration of Cd and Hg in <span class="hlt">fish</span> tissues increased with exposure period while the concentration of Zn was maintained in NIFI and decreased in CLSU between the 6th and 14th day of exposure, suggesting that Zn (an essential element) accumulation maybe regulated by both strains. PMID:8016636</p> <div class="credits"> <p class="dwt_author">Cuvin-Aralar, M L</p> <p class="dwt_publisher"></p> <p class="publishDate">1994-05-30</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">290</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24507119"> <span id="translatedtitle">Effects of chronic exposure of methomyl on the antioxidant system in liver of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The chronic effect of methomyl on the antioxidant system in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) was investigated. <span class="hlt">Fish</span> were exposed to sub-lethal concentrations of 0.2, 2, 20 and 200?gL(-1) for 30 days, and then transferred to methomyl-free water for 18 days. Hepatic antioxidant parameters, including Glutathione-S-transferase (GST), Glutathione peroxidase (GPx), Glutathione reductase (GR), Reduced glutathione (GSH) and oxidized glutathione (GSSG), were measured at 10min (day 0), 6, 12, 18, 24 and 30 days after starting the experiment and at 18 days after transferring to methomyl-free water. There were no significant changes in enzymatic activity and content of antioxidants in liver of tilapia exposed to 0.2?gL(-1) methomyl compared to controls. However, the results showed significant increases in activities of GST, GR, GPx and levels of GSSG accompanied by a decrease in GSH levels following methomyl exposure in tilapia to 2, 20 or 200?gL(-1) over the 30-day exposure period and the highest induction rates in GST, GR, GPx and GSSG were 150.87%, 163.21%, 189.76%, and 179.56% of the control respectively, and the highest inhibition rate in GSH was 50.67% of the control, suggesting the presence of oxidative stress. Thus it would appear that the 0.2?gL(-1) methomyl might be considered as the no observed adverse effect level (NOAEL). Recovery data showed that the effects produced by lower concentration of methomyl 20?gL(-1) were reversible but not at the higher 200?gL(-1) concentration. PMID:24507119</p> <div class="credits"> <p class="dwt_author">Meng, Shun Long; Chen, Jia Zhang; Hu, Geng Dong; Song, Chao; Fan, Li Min; Qiu, Li Ping; Xu, Pao</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-03-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">291</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://apps.unicordoba.edu.co/revistas/revistamvz/mvz-181/v18n1a4.pdf"> <span id="translatedtitle">Determinación y prevalencia de Mycobacterium spp., en tilapia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> cultivada en Campeche, México</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Objetivo. Determinar la presencia y prevalencia de Mycobacterium spp., en granjas de tilapia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> en el Municipio de Champotón, Campeche, México. Materiales y métodos. La colecta de organismos se realizó en tres granjas de cultivo de tilapia nilótica del municipio de Champotón, Campeche, México. Los organismos se examinaron externa e internamente y se tomó una muestra de riñón la cual fue sembrada en forma de estría en medios de cultivo: Löwesntein-Jensen, TCBS, KF y en TSA; las placas fueron incubadas a 35°C de 24 a 48 horas, los órganos fueron fijados en formalina tamponada al 10% para ser procesados para histología de rutina para análisis posteriores. Asimismo, muestras de cultivo bacteriológico y de tejido fueron teñidas con la técnica de Ziel-Neelsen con el fin de observar la presencia de bacilos ácido-alcohol resistentes. Resultados. Los resultados obtenidos sugieren que la presencia de Mycobacterium spp., es constante y en alta prevalencia y puede ser un factor que este mermando la rentabilidad del cultivo. Conclusiones. La presencia de Mycobacterium spp., representa un riesgo para el cultivo de tilapia en el municipio de Champotón, por ser una enfermedad muy persistente y difícil de erradicar una vez ocurrido e brote de infección, por lo cual es importante llevar estudios más detallados de la presencia de este género bacteriano, así como, medidas de prevención y dispersión de este patógeno en los cultivos adyacentes.</p> <div class="credits"> <p class="dwt_author">Maurilio Lara-Flores</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-03-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">292</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.maxwellsci.com/jp/abstract.php?jid=AJFST&no=67&abs=01"> <span id="translatedtitle">Influence of Ultrafiltration on Antioxidant Activity of Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Protein Hydrolysate</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The production of hot w ater dip hydrolysate (HWDH from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> with DH of 25.43% improved its bioactivity. A pressure-driven ultrafiltration (UF membrane separated HWDH based on molecular weight cut-offs (MWCO of 1000, 3000, and 5,000 Da, to produce fractions F1-k, F3-k, F5-k respectively and 5k-R (retentate of 5,000 Da with antioxidative activity. The UF produced permeates with smaller Mw distribution (177-3015 Da, with F1-k portraying lowest molecular weight range (180-2008 Da, whilst the retentate fraction ranged higher 179-8130 Da. The antioxidant efficacy of fractions with ABTS, DPPH, inhibition of linoleic acid autoxidation, Metal-chelating ability, and reducing power exhibited antioxidant activity (82.30% for F1-k, within range of "-tocopherol (87.04% and BHT (89.71% in linoleic acid oxidation system. Furthermore, F1-k exhibited higher ABTS, DPPH and M etal-chelating activity with a significant difference (p<0.05. The correlation between the smaller Mw size and antioxidant activity is superiorly exhibited in the F1-k fraction.</p> <div class="credits"> <p class="dwt_author">Mohamed Beva Kelfala Foh</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">293</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=3997845&rendertype=abstract"> <span id="translatedtitle">Antimicrobial Susceptibility of Escherichia coli Isolated from Fresh-Marketed Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The contamination of seafood by bacteria of fecal origin, especially Escherichia coli, is a widely documented sanitary problem. The objective of the present study was to isolate E. coli strains from the gills, muscle, and body surface of farmed Nile tilapias (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fresh-marketed in supermarkets in Fortaleza (Ceará, Brazil), to determine their susceptibility to antibiotics of different families (amikacin, gentamicin, imipenem, cephalothin, cefotaxime, ciprofloxacin, aztreonam, ampicillin, nalidixic acid, tetracycline, and sulfametoxazol-trimetoprim), and to determine the nature of resistance by plasmid curing. Forty-four strains (body surface = 25, gills = 15, muscle = 4) were isolated, all of which were susceptible to amikacin, aztreonam, cefotaxime, ciprofloxacin, gentamicin, and imipenem. Gill and body surface samples yielded 11 isolates resistant to ampicillin, tetracycline, and sulfametoxazol-trimetoprim, 4 of which of plasmidial nature. The multiple antibiotic resistance index was higher for strains isolated from body surface than from gills. The overall high antibiotic susceptibility of E. coli strains isolated from fresh-marketed tilapia was satisfactory, although the occasional finding of plasmidial resistance points to the need for close microbiological surveillance of the farming, handling, and marketing conditions of aquaculture products.</p> <div class="credits"> <p class="dwt_author">Rocha, Rafael dos Santos; Leite, Lana Oliveira; de Sousa, Oscarina Viana; Vieira, Regine Helena Silva dos Fernandes</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">294</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://pubs.er.usgs.gov/publication/70021681"> <span id="translatedtitle">Induction of triploidy and tetraploidy in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Induction of triploidy and tetraploidy in Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, was investigated by heat shock, cold shock, hydrostatic pressure, and/ or chemicals (cytochalasin A, B, and D). Additionally, efficacy of combined protocols was determined. Heat shock 10 min after fertilization induced triploidy when incubation temperature was 24 C but not when incubation temperature was 31 C. Heat shock of 40-41 C at 4-6 min after fertilization was effective in inducing up to 100% triploidy with hatchability similar to controls. Cold shock at 13 C for 45 min five min after fertilization induced 85-100% triploids. Heat shock and multiple heat shocking were the most effective treatments for the induction of tetraploidy. Two heat treatments of 41 C applied at 65 and 80 min after fertilization for 5 min each produced approximately 80% tetraploidy in hatched fry. Immersion of fertilized eggs in cytochalasin A, B, or D at concentrations up to 10 ??g/L applied at various times and durations was ineffective in inducing triploidy or tetraploidy.</p> <div class="credits"> <p class="dwt_author">El, Gamal, A. -R. A.; Davis, K. B.; Jenkins, J. A.; Les, Torrans, E.</p> <p class="dwt_publisher"></p> <p class="publishDate">1999-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">295</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.revistas.ufg.br/index.php/vet/article/view/412"> <span id="translatedtitle">EFEITOS DA DENSIDADE DE ESTOCAGEM NA SEGUNDA ALEVINAGEM DE TILÁPIA NILÓTICA (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, EM SISTEMA RACEWAY</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Avaliaram-se as densidades de estocagem na segunda alevinagem de tilápia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> em sistema raceways. O experimento foi realizado de novembro a dezembro de 2003, no Setor de Piscicultura da Universidade Federal de Goiás, totalizando 35 dias. Utilizaram-se doze tanques de 90 L, com troca de água a cada sessenta minutos no início e 45 minutos no final. O peso inicial dos alevinos era de 8,04 ± 1,81 g. Avaliaram-se as seguintes densidades: 700 alevinos/m3; 1.000 alevinos/m3 e 1.300 alevinos/m3,, segundo as variáveis mortalidade; peso final; comprimento final; biomassa final; conversão alimentar aparente; ganho de peso; ganho de peso diário;taxa de eficiência protéica; taxa de crescimento específico e fator de condição. Para tanto, fez-se uso do teste Tukey e análise de variância, com 95% de confiança. O tratamento intermediário e com a maior densidade apresentaram biomassa final significativamente maior (p<0,05 que o tratamento com a menor densidade. As demais variáveis não apresentaram diferenças significativas entre os tratamentos (p>0,05, sendo que o oxigênio dissolvido atingiu valores críticos ao final. A mortalidade no início da pesquisa diminuiu a densidade populacional, com produtividade semelhante entre os tratamentos, uma vez que não se atingiu o limite máximo de suporte desse sistema de produção. PALAVRAS-CHAVE: Densidade de estocagem, raceway, segunda alevinagem, tilápia</p> <div class="credits"> <p class="dwt_author">Nádia Pales Machado</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-10-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">296</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000400002&lang=en"> <span id="translatedtitle">Farinha de vísceras de aves em rações para alevinos de tilápia do Nilo,<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.) / Poultry by-product meal in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fingerlings diets</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: Portuguese Abstract in portuguese Este estudo foi conduzido com o objetivo de avaliar o desempenho e as características de carcaças de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) submetidos a rações com níveis de inclusão de farinha de vísceras (FV), assim como os coeficientes de digestibilidade aparente (CDA) dos nutrientes [...] deste alimento. Para o experimento de desempenho, foram utilizados 300 alevinos, com peso inicial médio de 0,35 ± 0,01 g, distribuídos em trinta tanques-rede (120 L), instalados em cinco tanques (1000 L). Foram utilizados seis níveis de inclusão de FV nas rações (0,00; 4,00; 8,00; 12,00; 16,00 e 20,00%), em um delineamento experimental, em blocos casualizados com seis tratamentos e cinco repetições. Realizou-se um ensaio de digestibilidade, com rações contendo 0,00 e 20,00% de FV, fornecidas a peixes com peso médio de 47,81 ± 9,97 g. Observou-se aumento linear da porcentagem de ganho de peso e taxas de eficiência protéica e de retenção de nitrogênio, com o aumento nos teores de FV nas rações, e efeito quadrático para conversão alimentar, taxa de retenção de extrato etéreo e porcentagens de proteína bruta e extrato etéreo na carcaça. Em relação à digestibilidade, a ração com 20,00% de FV apresentou menores CDA para a matéria seca, proteína bruta e energia bruta e maiores para extrato etéreo. Entretanto, maiores valores de extrato etéreo e energia digestíveis foram obtidos na ração com 20,00% de FV, embora a proteína digestível tenha sido inferior com 0,00% de FV. Os CDA do extrato etéreo, proteína bruta e energia bruta da farinha de vísceras foram de 70,45; 63,93 e 55,89%, respectivamente. A inclusão de 20,00% de FV na ração promoveu melhor desempenho, porém aumentou o teor de extrato etéreo e reduziu o de proteína bruta na carcaça, ocorrendo, ainda, diminuição dos CDA da matéria seca, proteína e energia bruta das rações. Abstract in english Performance, carcass characteristics and coefficients of apparent digestibility of Nile tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fed diets with increasing levels of poultry by-product meal (PM) were evaluated. Three hundred fingerlings with average initial weight of 0.35±0.01 g were placed in thi [...] rty 120 L net ponds in five cement 1000 L tanks. Six levels of PM inclusion (0.00, 4.00, 8.00, 12.00, 16.00 and 20.00%) were used in the diets, in an experimental randomized blocks desing with six treatments and three replicates. An experiment of diet digestibility was undertaken with 0.00 and 20.00% PM diets on <span class="hlt">fish</span> of average weight 47.81±9.97 g. A linear improvement was observed at PM inclusion levels with regard to final weight, percentage of weight gain, protein efficiency rate, nitrogen retention and quadratic effect for food conversion, ether extract retention and percentages of crude protein and carcass ethereal extract. Concerning to the digestibility experiment, the 20.00% PM diet showed lower coefficients of apparent digestibility for dry matter, crude protein, crude energy and higher coefficients for ether extract. However, higher values of digestible ether extract and energy were obtained with 20.00% PM diet, even though digestible protein was lower than the 0.00% PP diet. Apparent digestibility coefficients of the ether extract, crude protein and crude energy of PM for the Nile tilapia were 70.45, 63.93 and 55.89% respectively. Thus, the inclusion of 20.00% PM in diet improved performance, however increased ether extract content and decreased crude protein levels in carcass and dry matter, crude protein and energy digestibility coefficients of the diets.</p> <div class="credits"> <p class="dwt_author">Anna Christina Esper Amaro de, Faria; Carmino, Hayashi; Claudemir Martins, Soares.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">297</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000400002"> <span id="translatedtitle">Farinha de vísceras de aves em rações para alevinos de tilápia do Nilo,<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L. Poultry by-product meal in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings diets</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Este estudo foi conduzido com o objetivo de avaliar o desempenho e as características de carcaças de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> submetidos a rações com níveis de inclusão de farinha de vísceras (FV, assim como os coeficientes de digestibilidade aparente (CDA dos nutrientes deste alimento. Para o experimento de desempenho, foram utilizados 300 alevinos, com peso inicial médio de 0,35 ± 0,01 g, distribuídos em trinta tanques-rede (120 L, instalados em cinco tanques (1000 L. Foram utilizados seis níveis de inclusão de FV nas rações (0,00; 4,00; 8,00; 12,00; 16,00 e 20,00%, em um delineamento experimental, em blocos casualizados com seis tratamentos e cinco repetições. Realizou-se um ensaio de digestibilidade, com rações contendo 0,00 e 20,00% de FV, fornecidas a peixes com peso médio de 47,81 ± 9,97 g. Observou-se aumento linear da porcentagem de ganho de peso e taxas de eficiência protéica e de retenção de nitrogênio, com o aumento nos teores de FV nas rações, e efeito quadrático para conversão alimentar, taxa de retenção de extrato etéreo e porcentagens de proteína bruta e extrato etéreo na carcaça. Em relação à digestibilidade, a ração com 20,00% de FV apresentou menores CDA para a matéria seca, proteína bruta e energia bruta e maiores para extrato etéreo. Entretanto, maiores valores de extrato etéreo e energia digestíveis foram obtidos na ração com 20,00% de FV, embora a proteína digestível tenha sido inferior com 0,00% de FV. Os CDA do extrato etéreo, proteína bruta e energia bruta da farinha de vísceras foram de 70,45; 63,93 e 55,89%, respectivamente. A inclusão de 20,00% de FV na ração promoveu melhor desempenho, porém aumentou o teor de extrato etéreo e reduziu o de proteína bruta na carcaça, ocorrendo, ainda, diminuição dos CDA da matéria seca, proteína e energia bruta das rações.Performance, carcass characteristics and coefficients of apparent digestibility of Nile tilapia fingerlings (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fed diets with increasing levels of poultry by-product meal (PM were evaluated. Three hundred fingerlings with average initial weight of 0.35±0.01 g were placed in thirty 120 L net ponds in five cement 1000 L tanks. Six levels of PM inclusion (0.00, 4.00, 8.00, 12.00, 16.00 and 20.00% were used in the diets, in an experimental randomized blocks desing with six treatments and three replicates. An experiment of diet digestibility was undertaken with 0.00 and 20.00% PM diets on <span class="hlt">fish</span> of average weight 47.81±9.97 g. A linear improvement was observed at PM inclusion levels with regard to final weight, percentage of weight gain, protein efficiency rate, nitrogen retention and quadratic effect for food conversion, ether extract retention and percentages of crude protein and carcass ethereal extract. Concerning to the digestibility experiment, the 20.00% PM diet showed lower coefficients of apparent digestibility for dry matter, crude protein, crude energy and higher coefficients for ether extract. However, higher values of digestible ether extract and energy were obtained with 20.00% PM diet, even though digestible protein was lower than the 0.00% PP diet. Apparent digestibility coefficients of the ether extract, crude protein and crude energy of PM for the Nile tilapia were 70.45, 63.93 and 55.89% respectively. Thus, the inclusion of 20.00% PM in diet improved performance, however increased ether extract content and decreased crude protein levels in carcass and dry matter, crude protein and energy digestibility coefficients of the diets.</p> <div class="credits"> <p class="dwt_author">Anna Christina Esper Amaro de Faria</p> <p class="dwt_publisher"></p> <p class="publishDate">2002-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">298</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.ve/scielo.php?script=sci_arttext&pid=S0798-72692010000300005&lang=en"> <span id="translatedtitle">Masculinización de la tilapia del Nilo <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Actinopterygii: Cichlidae) por inmersión en Fluoximesterona y Testostesterona enantato / Masculinization of Nile tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Actinopterygii: Cichlidae) by immersion in fluoximesterone and testosterone enanthate</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Venezuela | Language: Spanish Abstract in spanish En el presente trabajo se evaluó el efecto de la fluoximesterona (F) y testosterona enantato (T) en el crecimiento, supervivencia y proporción sexual de la progenie de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. En estanques de 50 l se colocaron 38 larvas por unidad experimental. Los tratamientos por triplicado fueron F [...] 4 400 ?g?l-1; F12 1.200 ?g?l-1;F20 2.000 ?g?l-1; y T4 400 ?g?l-1; T12 1.200 ?g?l-1; T20 2.000 ?g?l-1; así como los controles agua (A) y agua más alcohol (AE). Se determinó la tasa específica de crecimiento en longitud total (TEC-L) y en peso húmedo (TEC-P), el experimento finalizó cuando los peces tenían una edad de 138 días después de la fecundación (DPF). La proporción sexual se evaluó mediante la observación directa de la gónada en un estereoscopio y microscopio compuesto. No se encontraron diferencias significativas en TEC-P, TEC-L y en la supervivencia entre los tratamientos. Sin embargo, en la proporción sexual se encontraron diferencias significativas, indicando que F20 (93 %) valor superior a los controles A (58 %) y AE (62 %), y a los tratamientos F12 (72 %), T4 (69 %), T20 (65 %) y semejante estadísticamente a F4 (79 %), y T12 (73 %). Los tratamientos F4, F12, T4, T12 y T20, no presentaron diferencias significativas con respecto a los controles A y AE. La masculinización obtenida con el tratamiento por inmersión en F (2000 ?g?1-1) permite considerar este procedimiento como eficiente para la producción de progenie masculina de tilapia Abstract in english The effect of the hormone fluoximesterone (F) and testosterone enanthate (T) were evaluated in the growth, survival and the sex ratio of offspring of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. In 50 liter tanks, 38 larvae were placed in each experimental unit. Treatments were triplicated: F4 400 ?g?l-1; F12 1.200 ?g?l- [...] 1;F20 2.000 ?g?l-1; y T4 400 ?g?l-1; T12 1.200 ?g?l-1; T20 2.000 ?g?l-1, as well as controls for water (A) and water plus alcohol (EA). The rate of growth was measured in length (TEC-L) and in weight (TEC-P). The experiment ended when the <span class="hlt">fish</span> had reached an age of 138 days after fertilization (DPF). The sex ratio was determined by the direct observation of the gonad using a stereoscope and a compound microscope. After the experiment concluded, there were no significant differences in TEC-P, TEC-L, nor in survival in the treatments and controls. In the sex ratio, there were significant differences between treatments, indicating that F20 (93%) was significantly higher than controls A (58%) and AE (62%) and treatments F12 (72%), T4 (69% ), T20 (65%). F20 was statistically similar to F4 (79%) and T12 (73%). Treatments F4, F12, T4, T12 and T20, showed no significant differences compared to controls A and AE. The masculinization obtained with treatment by fluoxymesterone immersion (2000 ?g?1-1) allows us to consider this procedure as efficient for the production of male progeny of tilapia</p> <div class="credits"> <p class="dwt_author">Pablo, Torres-Hernández; Graciela Beatriz, Nucamendi-Rodríguez; Pablo, Pintos-Terán; José Alberto, Montoya-Márquez.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">299</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=doajarticles::b6ee8f89fe8bcb6db1fb2cf2e2b3b794"> <span id="translatedtitle">Control of Reproduction in <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Linnaeus 1758) Using Hibiscus Rosa-sinensis (Linn.) Leaf Meal as Reproduction Inhibitor</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Hibiscus rosa-sinensis leaf (HLM) was added to a basal diet (350g crude protein and 18.5MJ gross energy/kg<br />diet) at 0, 1.0, 2.0, 3.0 or 4.0 g/kg diets and fed to mixed-sex <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> for 60 days to evaluate the<br />effects on growth, feed conversion ratio, reproduction traits, and histology of gonads. There were no variations<br />(p >0.05) in growth parameters and feed conversion ratio. Indices of reproduction traits decreased with<br />increasing ...</p> <div class="credits"> <p class="dwt_author">Jegede, Temitope</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">300</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/jbs/2012/438-442.pdf"> <span id="translatedtitle">Massive Mortality Associated with Streptococcus agalactiae Infection in Cage-cultured Red Hybrid Tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Como River, Kenyir Lake, Malaysia</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Massive mortality of cage-cultured red hybrid tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> in Como River, Kenyir Lake, Malaysia was investigated. Moribund <span class="hlt">fish</span> showing erratic swimming, sluggishness and hemorrhagic eyes were collected for the study. Water quality parameters were measured on-site. The highest temperature was 32.70°C at the surface while lower temperature was 30.85°C at 6 m. Dissolved Oxygen (DO was highest 7.05 mg L-1 at 4 m while lowest 6.15 mg L-1 at 10 m. The pH value was highest 8.28 at 6 m and lowest 7.52 at surface. The result has shown that un-ionized ammonia levels ranged from 0.00046-0.01 ppm within the optimum range. While Nitrite (0.003 ppm and Nitrate values (0.1-0.7 ppm. The water quality parameters were showed their values within the accepted range of water quality for aquaculture. Bacteria were isolated from diseased <span class="hlt">fish</span> using blood and nutrient agars, and identified using BBL Crystal™ Enteric/Non-fermenter ID and Gram Positive ID Systems and subjected to antibiotic susceptibility analysis. Results showed the presence of Streptococcus agalactiae, Burkholderia cepacia in the <span class="hlt">fish</span> liver and Staphylococcus aureus in the <span class="hlt">fish</span> eyes, suggesting a possible case of warm-water streptococcosis associated with S. agalactiae with multiple bacterial complications. Nevertheless, a continuous long term monitoring is essential for the sustainable development of cage aquaculture in Como river of Lake Kenyir Malaysia.</p> <div class="credits"> <p class="dwt_author">K.C.A. Jalal</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_14");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a style="font-weight: bold;">15</a> <a onClick='return showDiv("page_16");' href="#">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_16");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">301</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000400005&lang=en"> <span id="translatedtitle">Quantification of essential fatty acids in the heads of nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fed with linseed oil</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese O objetivo do presente trabalho foi avaliar os efeitos do óleo de linhaça sobre as concentrações dos teores de ácidos graxos poli-insaturados n-6 e n-3 (AGPI) em cabeças de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), um resíduo do pescado normalmente descartado durante o processo de filetagem. A quanti [...] ficação dos ácidos graxos poli-insaturados foi realizada utilizando-se cromatografia gasosa (CG), sendo a concentração dos ácidos graxos expressa em termos de massa absoluta através da utilização do éster metílico (23:0) como padrão interno e do TCFx (fator de correção teórica do FID). As tilápias receberam dietas com níveis crescentes de óleo de linhaça (0,00, 1,25, 2,50, 3,75 e 5,00%) em substituição ao óleo de girassol (controle) durante um período de cinco meses. A ingestão de LNA causa a dessaturação sequencial e alongamento das cadeias carbônicas de ácidos graxos presentes nas cabeças de peixes, levando a um aumento em todos os AGPIs n-3. Este experimento demonstrou claramente que a adição de óleo de linhaça na ração de tilápia do Nilo aumenta significativamente as concentrações (em 100 g-1 de cabeça) de LNA (100,8 para 973,6 mg), EPA (4,8 para 82,1 mg) e DHA (24,0 para 125,4 mg). Estas alterações contribuem acentuadamente para melhorar a razão AGPI n-6/n-3 e, desta forma, pode ser utilizada em suplementos alimentícios, transformando as cabeças de tilápia em valiosa alternativa como fonte de alimento para dieta humana. Abstract in english The objective of this study was to examine the effects of linseed oil on n-6 and n-3 polyunsaturated (PUFA) fatty acid content in the heads of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), these are normally discarded during the filleting process. The quantification of PUFA was carried out in absolute weigh [...] ts through the use of methyl ester (23:0), as an internal standard, and TCFx (theoretical FID correction factor) by GC gas chromatography. Tilapias were given diets with increasing levels (0.00, 1.25, 2.50, 3.75 and 5.00%) of linseed oil as a replacement for sunflower oil (control) for a period of five months. The ingestion of LNA causes sequential desaturation and elongation in <span class="hlt">fish</span> heads, leading to an increase in all n-3 PUFAs. This experiment demonstrated clearly that adding linseed oil to the feed of Nile tilapia can markedly increase the amounts (per 100 g-1 of head) of LNA (100.8 to 973.6 mg), EPA (4.8 to 82.1 mg), and DHA (24.0 to 125.4 mg) in their heads, and thus, may be used to help balance n-6/n-3 PUFA ratios in dietary supplements, and creating a valuable alternative food source in the human diet.</p> <div class="credits"> <p class="dwt_author">Ana C., Aguiar; Solange M., Cottica; Marcela, Boroski; Cláudio C., Oliveira; Elton G., Bonafé; Polyana B., França; Nilson E., Souza; Jesui V., Visentainer.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">302</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.sjst.psu.ac.th/journal/29-5_online/0125-3395-29-5-1283-1299.pdf"> <span id="translatedtitle">Effects of palm kernel cake (PKC on growth performance, blood components and liver histopathology of sex reversed red tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Effects of Palm Kernel Cake (PKC on growth performance, blood components and liver histopathology of sex- reversed red tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> were studied using seven isocaloric diets (3400 kCal/ kg containing different levels of protein and PKC. Diet 1, 2 and 3 contained 20% protein with the supplementation of 15, 30 and 45% PKC, respectively. Diets 4, 5 and 6 contained 24% protein in combinationwith the same PKC supplemention levels mentioned above, and diet 7 was commercial feed containing 20% protein as a control diet. Experimental diets were fed to experimental <span class="hlt">fish</span> of 48.65 g initial average body weight cultured in floating cages (3 cages/diet for 10 weeks. <span class="hlt">Fish</span> fed diets containing higher protein (24%; diets 4, 5 and 6 had significantly better growth performance (p<0.05 than those fed lower protein (20%; diets 1, 2 and 3. Considering the effect of PKC, <span class="hlt">fish</span> fed diet 5 (Prot. 24%, PKC 30% gave the greatest growth performance (p<0.05 and all the PKC-fed groups had significantly higher growth than <span class="hlt">fish</span> fed control diet. There was evidence that supplementation of PKC in <span class="hlt">fish</span> feed ranging from 15 to 45% had no effect to the survival rate, blood components, or hepatocytic cells of tilapia. However, liver tissue showed higher numbers of lipid droplets in <span class="hlt">fish</span> fed diet contained 45% PKC (diets 3 and 6. For the production cost, all test diets with PKC supplementation had significantly higher price (p<0.05 than commercial feed. However, when considering the feeding cost per unit of <span class="hlt">fish</span> production, <span class="hlt">fish</span> reared with PKC supplemented diets had significantly lower cost (p<0.05 than <span class="hlt">fish</span> fed commercial feed.</p> <div class="credits"> <p class="dwt_author">Sukasem, N.</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">303</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=https://beta.openaire.eu/index.php?option=com_openaire&view=article&Itemid=114&articleId=od_______908::ced6ef4d419a0ea943dcc9cb1e91db71"> <span id="translatedtitle">Complete Genome Sequence of Streptococcus agalactiae ZQ0910, a Pathogen Causing Meningoencephalitis in the GIFT Strain of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://search1.driver.research-infrastructures.eu/webInterface/simpleSearch.do?action=load">Digital Repository Infrastructure Vision for European Research (DRIVER)</a></p> <p class="result-summary">Streptococcus agalactiae (group B streptococcus [GBS]) is a pathogen that causes meningoencephalitis in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Here, we reported the complete genome sequence of S. agalactiae strain ZQ0910, which was isolated from the GIFT strain of Nile tilapia in Guangdong, China.</p> <div class="credits"> <p class="dwt_author">Wang, Bei; Jian, Jichang; Lu, Yishan; Cai, Shuanghu; Huang, Yuchong; Tang, Jufen; Wu, Zaohe</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">304</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000300028"> <span id="translatedtitle">Técnica simples para identificação de fêmeas de tilápia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> realizando incubação oral dos ovos A simple technique to identify nile tilapia females (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> incubating eggs orally</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Em laboratórios de aquacultura que trabalham com reprodução de tilápia nilótica (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> utilizando água cristalina, é freqüentemente necessário verificar se as fêmeas estão realizando incubação oral dos ovos. Quando não se tem prática a olho nu, essa constatação torna-se difícil e demorada. Nos casos em que não se consegue identificar visualmente a incubação, é necessário o uso de técnicas que estressam as fêmeas e que, freqüentemente, danificam os ovos. O presente trabalho descreve uma técnica simples para a identificação de fêmeas de tilápia nilótica que estão realizando incubação oral, em água cristalina, através do uso de espelho. Os resultados demonstram que é possível identificar as fêmeas realizando incubação oral com 100% de eficiência.In aquaculture laboratories which work with Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> reproduction and use crystalline water, is frequently necessary to verify whether the females are incubating orally the eggs. The identification of the females when there is not know-how is difficult and slow, and in most cases is stressful and damage the eggs. This study describes a simple technique, using a mirror, to identify Nile tilapia incubating eggs orally in crystalline water. The results showed that is possible to identify the females which are incubating orally with 100% efficiency.</p> <div class="credits"> <p class="dwt_author">Marco Aurélio Rotta</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">305</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100027&lang=en"> <span id="translatedtitle">Productive performance of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) fed at different frequencies and periods with automatic dispenser / Desempenho produtivo de tilápias do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) alimentadas em diferentes frequências e períodos com dispensador automático</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese Avaliou-se o desempenho de tilápias-do-nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) produzidas em tanque-rede, providas de dispensadores automáticos de ração, alimentadas em diferentes frequências - uma vez por hora e a cada duas horas - e períodos - durante o dia, à noite ou ambos. Dezoito tanques-rede de 1.0m³ fo [...] ram colocados em um tanque de 2000m² com dois metros de profundidade e renovação de água de 5%. Cento e setenta tilápias, com peso inicial de 16.0±4.9g foram distribuídas em cada tanque-rede de 1m³ e a taxa alimentar foi ajustada a cada 21 dias junto com as biometrias. As medidas foram coletadas de março a julho (outono e inverno). Observou-se diferença significativa para peso final (P Abstract in english The performance of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) raised in cages furnished with an automatic dispenser, supplied at different frequencies (once per hour and once every two hours) and periods (daytime, nighttime and both) was evaluated. Eighteen 1.0m³ cages were placed into a 2000m² pond, two [...] meters deep with a 5% water exchange. One hundred and seventy tilapias, with initial weight of 16.0±4.9g, were dispersed into each 1m³ cage and the feed ration was adjusted every 21 days with biometry. Data was collected from March to July (autumn and winter). Significant difference to final weight (P</p> <div class="credits"> <p class="dwt_author">Sousa, R.M.R.; Agostinho, C.A.; Oliveira, F.A.; Argentim, D.; Novelli, P.K.; Agostinho, S.M.M..</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">306</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.uel.br/revistas/uel/index.php/seminabio/article/view/3663"> <span id="translatedtitle">Daily ration levels for nile tilapia (<span class="hlt">oreochromis</span> <span class="hlt">niloticus</span>, l. fingerlings cultivated in low temperatures Níveis diários de arraçoamento para alevinos de tilápia do nilo (<span class="hlt">oreochromis</span> <span class="hlt">niloticus</span>, l. cultivados em baixas temperaturas</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The experiment was carried out in the Aquaculture Laboratory from the State University of Maringá, with the purpose of evaluating the Nile tilapia fingerlings ideal ration levels. Eighty fingerlings were used, with initial average weight of 0.88 ± 0.12 g and initial average length of 3.76 ± 0.20 cm, divided in 16 net cages distributed in four water tanks (1000L, with five <span class="hlt">fish</span> each. The design was completely randomized with four treatments and four replications (4, 7, 10 and 13% of the <span class="hlt">fish</span> biomass. They were fed with a diet of 30% gross protein. The evaluated variables were, final average weight (FW, weight gain (WG, food conversion (FC, final average length (FL, size variation weight (SW and survival (S. The FW, FL and FC presented positive linear relation (PO experimento foi realizado no Laboratório de Aqüicultura da Universidade Estadual de Maringá, com o objetivo de avaliar o nível ideal de arraçoamento para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Foram utilizados oitenta alevinos com peso médio inicial de 0,88 ± 0,12 g e comprimento inicial médio de 3,76 ± 0,20 cm, distribuídos em 16 tanques-rede situados em quatro caixas de 1000 L. Cada tanque-rede com cinco peixes foi considerado como unidade experimental. O delineamento foi inteiramente casualizado, com quatro tratamentos e quatro repetições (4, 7, 10 e 13% do peso vivo. Os animais foram alimentados com ração contendo 30% de proteína bruta. As variáveis avaliadas foram peso final médio (PF, ganho de peso (GP, conversão alimentar (CA, comprimento final médio (CF uniformidade do lote (UNI e sobrevivência (S. O PF, CF e CA apresentaram relação linear positiva (P0,05 entre os tratamentos. Os parâmetros físico-químicos permaneceram dentro da faixa recomendada para os peixes. Concluiu-se que o nível ideal de arraçoamento para alevinos de tilápia do Nilo em uma temperatura média de 23ºC é 11,55% do peso vivo dos mesmos.  </p> <div class="credits"> <p class="dwt_author">Telma Soares</p> <p class="dwt_publisher"></p> <p class="publishDate">2003-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">307</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.biomedcentral.com/1471-2156/12/102"> <span id="translatedtitle">Spatial and temporal variation in population genetic structure of wild Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> across Africa</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Abstract Background Reconstructing the evolutionary history of a species is challenging. It often depends not only on the past biogeographic and climatic events but also the contemporary and ecological factors, such as current connectivity and habitat heterogeneity. In fact, these factors might interact with each other and shape the current species distribution. However, to what extent the current population genetic structure reflects the past and the contemporary factors is largely unknown. Here we investigated spatio-temporal genetic structures of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> populations, across their natural distribution in Africa. While its large biogeographic distribution can cause genetic differentiation at the paleo-biogeographic scales, its restricted dispersal capacity might induce a strong genetic structure at micro-geographic scales. Results Using nine microsatellite loci and 350 samples from ten natural populations, we found the highest genetic differentiation among the three ichthyofaunal provinces and regions (Ethiopian, Nilotic and Sudano-Sahelian (RST = 0.38 - 0.69. This result suggests the predominant effect of paleo-geographic events at macro-geographic scale. In addition, intermediate divergences were found between rivers and lakes within the regions, presumably reflecting relatively recent interruptions of gene flow between hydrographic basins (RST = 0.24 - 0.32. The lowest differentiations were observed among connected populations within a basin (RST = 0.015 in the Volta basin. Comparison of temporal sample series revealed subtle changes in the gene pools in a few generations (F = 0 - 0.053. The estimated effective population sizes were 23 - 143 and the estimated migration rate was moderate (m ~ 0.094 - 0.097 in the Volta populations. Conclusions This study revealed clear hierarchical patterns of the population genetic structuring of O. <span class="hlt">niloticus</span> in Africa. The effects of paleo-geographic and climatic events were predominant at macro-geographic scale, and the significant effect of geographic connectivity was detected at micro-geographic scale. The estimated effective population size, the moderate level of dispersal and the rapid temporal change in genetic composition might reflect a potential effect of life history strategy on population dynamics. This hypothesis deserves further investigation. The dynamic pattern revealed at micro-geographic and temporal scales appears important from a genetic resource management as well as from a biodiversity conservation point of view.</p> <div class="credits"> <p class="dwt_author">Bezault Etienne</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">308</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5470/5470"> <span id="translatedtitle">Predation of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae by Pantala flavescens with different length classes = Predação de P. mesopotamicus e O. <span class="hlt">niloticus</span> por larvas de Pantala flavescens de diferentes classes de coprimento</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The experiment had as objective to study the survival of Piaractus mesopotamicus and <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. <span class="hlt">niloticus</span>, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L containing one larvae of Odonate and 10 larvae of <span class="hlt">fish</span> were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h, the remnant larvae of <span class="hlt">fish</span> (alive in each experimental unit was quantified, and we replaced the consumed larvae, so that we always had 10 larvae of <span class="hlt">fish</span> at each aquarium after each counting. For both <span class="hlt">fish</span> species, there was a slight increase in consumption by the Odonate with intermediate size, but the values did not differ statistically (p > 0.05. Larvae of Odonate in the treatments with greater length presented a lowerconsumption (p O experimento teve como objetivo avaliar a sobrevivência de larvas de P. mesopotamicus e O. <span class="hlt">niloticus</span> submetidas à predação por larvas de Pantala flavescens de diferentes classes de comprimento. Foram utilizadas 120 larvas de cada espécie de peixe e 24 larvas de Odonata, distribuídas em 24 aquários (2 L, sendo colocada uma Odonata por aquário. Os tratamentos diferiram quanto à espécie de presa e o tamanho do predador, sendo mantido um tratamento-controle. Um aquário (2 L com uma Odonata e dez larvas de peixe foi consideradauma unidade experimental. As Odonatas foram colocadas nos aquários 1h antes das larvas de peixe. Foram efetuadas contagens a cada 3h (18, 21, 0, 3, 6, 9, 12, 15 e 18h das larvas de peixe remanescentes (vivas em cada unidade experimental, sendo repostas as larvas consumidas, de modo a ter dez larvas de peixe em cada aquário logo após cada contagem. Para ambas as espécies de peixe, foi observado leve aumento no consumo das larvas pelas Odonatas de tamanhointermediário, porém os valores não diferiram estatisticamente (p > 0,05. As larvas de Odonata nos tratamentos em que apresentavam maior comprimento tiveram consumo menor (p < 0,05 que nos demais.</p> <div class="credits"> <p class="dwt_author">Carlos Henrique Figueiredo Lacerda</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">309</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://revistas.ufba.br/index.php/rbspa/article/view/1812"> <span id="translatedtitle">Densidade de estocagem de alevinos da Tilápia "<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>" (linhagem Chitralada cultivada em tanques-rede</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available O objetivo deste trabalho foi avaliar densidades de estocagem de alevinos de tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, linhagem Chitralada, em tanques-rede instalados no reservatório de Xingó. Foram utilizados 12 estruturas de tanques-rede de 5 m3, revestidos internamente com bolsões de PVC de 4m3 (malha de # 4-8 mm, nas quais foram estocados alevinos de 0,85 g. Adotou-se um delineamento experimental inteiramente casualizado, com três tratamentos (800, 950 e 1.100 alevinos/m3 e quatro repetições. Durante os primeiros 20 dias, a alimentação constou de ração comercial em pó (55% proteína bruta, fornecida oito vezes ao dia, a uma taxa de 12,5% da biomassa/dia, sendo em seguida substituída por outra, extrusada e desintegrada (45% de proteína bruta, numa taxa de alimentação de 8-6,5%/dia. No final da fase de berçário, com duração de 54 dias, os alevinos foram contados, medidos e pesados. As variáveis de qualidade da água como temperatura, pH, oxigênio dissolvido, alcalinidade, dureza total, amônia total e nitrito, não apresentaram diferença significativa entre os tratamentos (P?0,05. Do mesmo modo as variáveis de desempenho do cultivo como ganho de peso relativo (4.119%, taxa de crescimento específico (6,9%/dia, sobrevivência (93,2% e conversão alimentar (1,04, não diferiram estatisticamente entre os tratamentos (P?0,05. Dessa forma pode-se concluir que na fase de alevinagem é possível estocar até 1.100 alevinos/m3 para a obtenção de indivíduos de 30 gramas. Palavras-chave: tilápia; alevinos; densidades; tanques-rede.</p> <div class="credits"> <p class="dwt_author">Eudes de Souza Correia</p> <p class="dwt_publisher"></p> <p class="publishDate">2009-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">310</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23417791"> <span id="translatedtitle">Gene transfer and mutagenesis mediated by Sleeping Beauty transposon in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">The success of gene transfer has been demonstrated in many of vertebrate species, whereas the efficiency of producing transgenic animals remains pretty low due to the random integration of foreign genes into a recipient genome. The Sleeping Beauty (SB) transposon is able to improve the efficiency of gene transfer in zebrafish and mouse, but its activity in tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) has yet to be characterized. Herein, we demonstrate the potential of using the SB transposon system as an effective tool for gene transfer and insertional mutagenesis in tilapia. A transgenic construct pT2/tiHsp70-SB11 was generated by subcloning the promoter of tilapia heat shock protein 70 (tiHsp70) gene, the SB11 transposase gene and the carp ?-actin gene polyadenylation signal into the second generation of SB transposon. Transgenic tilapia was produced by microinjection of this construct with in vitro synthesized capped SB11 mRNA. SB11 transposon was detected in 28.89 % of founders, 12.9 % of F1 and 43.75 % of F2. Analysis of genomic sequences flanking integrated transposons indicates that this transgenic tilapia line carries two copies of SB transposon, which landed into two different endogenous genes. Induced expression of SB11 gene after heat shock was detected using reverse transcription PCR in F2 transgenic individuals. In addition, the Cre/loxP system was introduced to delete the SB11 cassette for stabilization of gene interruption and bio-safety. These findings suggest that the SB transposon system is active and can be used for efficient gene transfer and insertional mutagenesis in tilapia. PMID:23417791</p> <div class="credits"> <p class="dwt_author">He, Xiaozhen; Li, Jie; Long, Yong; Song, Guili; Zhou, Peiyong; Liu, Qiuxiang; Zhu, Zuoyan; Cui, Zongbin</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-10-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">311</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/biotech/2011/498-505.pdf"> <span id="translatedtitle">High Potential Probiotic Bacillus Species from Gastro-intestinal Tract of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available In study to obtain a safe Bacillus probiotic for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> cultivation, hemolytic activity on blood agar medium was used in isolation of Bacillus probiotic species from gastro-intestinal tract of Nile tilapia. One hundred and three isolates of Bacillus sp. which showed no hemolytic activity were obtained from 2 sampling sites of the Nile Tilapia net-cage culture farms. Among these 103 isolates, however, there was only 1 isolate, named as Bacillus UBRU4 which showed the inhibitory effect on Aeromonas hydrophila growth. The results of physiological and biochemical test and molecular identification (99.90% identity showed that Bacillus UBRU4 was similar to Bacillus brevis. This was possibly the first report of isolation of Bacillus brevis in aquaculture. The optimum pH and temperature for Bacillus UBRU4 growth on Tryptic soy broth were 6.5 and 37C, respectively. The maximum cell numbers of Bacillus UBRU4 in modified broth culture medium was obtained when using the medium contained 30 g L-1 of Nile tilapia commercial feed and 20 g L-1 of molasses. The bioactive compound production of Bacillus UBRU4 showed the growth associated characteristic. Partial purified bioactive compounds by 80% saturated ammonium sulfate could increase the activity to 6,400 AU mL-1. The specific activity of the bioactive compound was increased from 1,298 to 5,807 AU mg-1. These results suggested that the Bacillus UBRU4, thus, could possibly be used as high potential probiotic in Nile tilapia feed.</p> <div class="credits"> <p class="dwt_author">V. Leelavatcharamas</p> <p class="dwt_publisher"></p> <p class="publishDate">2011-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">312</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22494673"> <span id="translatedtitle">Sperm quality analysis in XX, XY and YY males of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">In Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), individuals with atypical sexual genotype are commonly used in farming (use of YY males to produce all-male offspring), but they also constitute major tools to study sex determinism mechanisms. In other species, sexual genotype and sex reversal procedures affect different aspects of biology, such as growth, behavior and reproductive success. The aim of this study was to assess the influence of sexual genotype on sperm quality in Nile tilapia. Milt characteristics were compared in XX (sex-reversed), XY and YY males in terms of gonadosomatic index, sperm count, sperm motility and duration of sperm motility. Sperm motility was measured by computer-assisted sperm analysis (CASA) quantifying several parameters: total motility, progressive motility, curvilinear velocity, straight line velocity, average path velocity and linearity. None of the sperm traits measured significantly differed between the three genotypes. Mean values of gonadosomatic index, sperm concentration and sperm motility duration of XX, XY and YY males, respectively ranged from 0.92 to 1.33%, from 1.69 to 2.22 ×10(9) cells mL(-1) and from 18'04? to 27'32?. Mean values of total motility and curvilinear velocity 1 min after sperm activation, respectively ranged from 53 to 58% and from 71 to 76 ?m s(-1) for the three genotypes. After 3 min of activity, all the sperm motility and velocity parameters dropped by half and continued to slowly decrease thereafter. Seven min after activation, only 9 to 13% of spermatozoa were still progressive. Our results prove that neither sexual genotype nor hormonal sex reversal treatments affect sperm quality in male Nile tilapias with atypical sexual genotype. PMID:22494673</p> <div class="credits"> <p class="dwt_author">Gennotte, V; François, E; Rougeot, C; Ponthier, J; Deleuze, S; Mélard, C</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-07-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">313</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23834584"> <span id="translatedtitle">Production of oocytes of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) for in vitro fertilization via hormonal treatments.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Only a few studies have described hormonal treatments for induction of synchronicity and gamete collection in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), both important for assortative matings in breeding programmes and essential for polyploidy technologies. In this study, we compared the effectiveness of carp pituitary extract (CPE), Nile tilapia pituitary extract (TPE), human chorionic gonadotropin (hCG) and gonadotropin-releasing hormone (GnRH) protocols on the induction of spawning and egg production in Nile tilapia. Among the hormonal treatments analysed, only hCG was effective for producing viable gametes for in vitro fertilization. To verify the viability of this hormonal treatment, hCG was tested using different doses (1000, 2000, 3000, 4000 and 5000 IU/kg) in a large number of females (208 animals) from two Nile tilapia lines. The results indicated that hCG doses between 1000 and 5000 IU/kg could be used to induce final oocyte maturation in Nile tilapia with collection of stripped oocytes. This is the first study to report differential reproductive responses to hormonal treatment between tilapia lines: line 1 was more efficient at producing eggs and post-hatching larvae after hCG induction than line 2. In conclusion, we demonstrated that the hCG protocol may be applied on a large scale to induce final oocyte maturation in Nile tilapia. The development of a protocol for in vitro fertilization in Nile tilapia may aid in breeding programmes and biotechnological assays for the development of genetically modified lines of Nile tilapia. PMID:23834584</p> <div class="credits"> <p class="dwt_author">Fernandes, A F A; Alvarenga, É R; Oliveira, D A A; Aleixo, C G; Prado, S A; Luz, R K; Sarmento, N L A F; Teixeira, E A; Luz, M R; Turra, E M</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">314</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/25020258"> <span id="translatedtitle">Molecular characterization and expression of CD2BP2 in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) in response to Streptococcus agalactiae stimulus.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">CD2BP2 (CD2 cytoplasmic tail binding protein 2), one of several proteins interacting with the cytoplasmic tail of CD2, plays a crucial role in CD2-triggered T cell activation and nuclear splicing. The studies on CD2BP2 have tended to be confined to a few mammals, and little information is available to date regarding <span class="hlt">fish</span> CD2BP2. In this paper, a CD2BP2 gene (On-CD2BP2) was cloned from Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. Sequence analysis showed that the full length of On-CD2BP2 cDNA was 1429bp, containing a 5'untranslated region (UTR) of 111bp, a 3'-UTR of 193bp and an open reading frame of 1125bp which is encoding 374 amino acids. Two important structural features, a GYF domain and a consensus motif GPFXXXXMXXWXXXGYF were detected in the deduced amino acid sequence of On-CD2BP2, and the deduced genomic structure of On-CD2BP2 was similar to the known CD2BP2. The mRNA expression of On-CD2BP2 in various tissues of Nile tilapia was analyzed by fluorescent quantitative real-time PCR. In healthy Nile tilapia, the On-CD2BP2 transcripts were mainly detected in the head kidney and spleen. While vaccinated with inactivated Streptococcus agalactiae, the On-CD2BP2 mRNA expression was significantly up-regulated in the head kidney, spleen and brain 48h post immunization. Moreover, there was a clear time-dependent expression pattern of On-CD2BP2 after immunization and the expression reached the highest level at 24h in the brain and 48h in the head kidney and spleen. This is the first report of proving the presence of a CD2BP2 ortholog in <span class="hlt">fish</span>, and investigating its tissue distribution and expression profile in response to bacterial stimulus. These findings indicated that On-CD2BP2 may play an important role in the immune response to bacteria in Nile tilapia. PMID:25020258</p> <div class="credits"> <p class="dwt_author">Gan, Zhen; Wang, Bei; Lu, Yishan; Cai, Shuanghu; Cai, Jia; Jian, JiChang; Wu, Zaohe</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-09-10</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">315</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjn/2007/271-275.pdf"> <span id="translatedtitle">Effect of Feeding Different Grain Sources on the Growth Performance and Body Composition of Tilapia, (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Fingerlings Fed in Outdoor Hapas</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The study investigated the growth performance and body composition of tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L fingerlings (4.70g ? 0.09 fed Isonitrogenous and Isoenergetic diet of 25% crude protein containing different grain sources (maize, wheat, rice, sorghum and millet designated DT1, DT2, DT3, DT4 and DT5 respectively. The study lasted for 56 days. <span class="hlt">Fish</span> fed a diet containing maize gave the highest mean weight gain (MWG of 6.05g; highest specific growth rate (SGR of 1.47; best food conversion ratio (FCR of 3.31 and the best Protein efficiency ratio (PER of 0.93. <span class="hlt">Fish</span> fed diet containing rice gave the poorest MWG of 4.70g and the poorest SGR, FCR and PER values. However, there is no significant difference in the values of SGR, FCR, PER and ANPU recorded for the five diets (P > 0.05. There was a difference in MWG of <span class="hlt">Fish</span> Fed Diet 1 (Maize compared to the <span class="hlt">fish</span> fed Rice and Millet (P< 0.05. The maize diet produced <span class="hlt">fish</span> with higher ether extract and Crude Protein in the body than <span class="hlt">fish</span> fed the other grains. The difference in ether extract and crude protein among the five diets was however not significantly different (P>0.05. It can be concluded that cereal grains inclusion in the diet of Tilapia up to 57.90% can be effectively utilized by the <span class="hlt">fish</span> with maize being the best followed closely by sorghum while rice remain the poorest in terms of growth response and nutrient utilization.</p> <div class="credits"> <p class="dwt_author">S.G. Solomon</p> <p class="dwt_publisher"></p> <p class="publishDate">2007-01-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">316</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/academicjournals/ijzr/2008/42-47.pdf"> <span id="translatedtitle">The Effect of Substituting Fishmeal Diets with Varying Quantities of Ensiled Parboiled Beniseed (Sesamum indicum and Raw African Locust Bean (Parkia biglobosa on the Growth Responses and Food Utilization of the Nile Tilapia <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available A mixture of ensiled parboiled beniseed (Sesamum indicum and raw African locust bean (Parkia biglobosa replaced fishmeal in the diet of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> at 0, 30, 70 and 100% test materials inclusion levels. Each dietary treatment was randomly duplicated in tanks stocked with twenty fingerlings (2.71 0.003 g and fed three times (08:00, 14:00 and 18:00 h to satiation for 56 days. The result revealed best live weight gain and feed utilization in the <span class="hlt">fish</span> fed diet D4 followed by diet D1 and D3 with the least value recorded in <span class="hlt">fish</span> fed diet D2 level. Generally, there was significant increase (p4 and control. The result supports the suggestion that tilapia can be fed with mixture of ensiled parboiled beniseed and raw African locust bean which is hoped will reduce tremendously the over dependence on fishmeal protein and human utilization of the very scarce <span class="hlt">fish</span> meal.</p> <div class="credits"> <p class="dwt_author">S.A. Binga</p> <p class="dwt_publisher"></p> <p class="publishDate">2008-01-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">317</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/1169/697"> <span id="translatedtitle">Influence of diets enriched with different vegetable oils on the performance and fatty acid profile of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings = Influência das dietas contendo diferentes óleos vegetais na performance e perfil em ácidos graxos de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available The fatty acid profile of the carcass of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings fed diets enriched with different soybean, canola, sunflower, flaxseed, rice, and corn oils was examined. The results showed that palmitic (16:0, stearic (18:0, oleic (18:1n-9, linoleic (18:2 n-6, and linolenic (18:3 n-3 acids were the predominant fatty acids in all vegetable oil, diet, and <span class="hlt">fish</span> carcass samples analyzed. Flaxseed oil presented the highest amount of linolenic acid (45.63%, while the other vegetable oils had percentages lower than 5.0%. Neither of the vegetable oils used affected the performance of tilapia fingerlings and they can be utilized in Nile tilapia fingerling diets. However, in relation to the carcass fatty acid profile, the use of flaxseed oil in Nile tilapia fingerling diet is recommended. Foram examinados o perfil de ácidos graxos nas carcaças de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> alimentados com dietas enriquecidas com diferentes óleos vegetais (soja, canola, girassol, linhaça, arroz e milho. Os resultados indicaram que o ácido palmítico (16:0, esteárico (18:0, oléico (18:1n-9, linoleico (18;2n-6 e linolênico (18:3n-3 foram os ácidos predominantes em todas as frações analisadas (no óleo vegetal, dietas e carcaças dos peixes. O óleo de linhaça apresentou o maior valor de ácido linolênico (45,63%, quanto aos outros óleos vegetais tiveram uma percentagem menor que 5,0%. Todos os óleos vegetais não afetaram a performance dos alevinos e podem ser utilizados nas dietas, entretanto, em relação a qualidade nutricional o uso do óleo de linhaça é recomendado em dietas de alevinos de tilápia.</p> <div class="credits"> <p class="dwt_author">Nilson Evelázio de Souza</p> <p class="dwt_publisher"></p> <p class="publishDate">2006-07-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">318</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.pe/scielo.php?script=sci_arttext&pid=S1727-99332013000300005&lang=en"> <span id="translatedtitle">Efecto ahorrativo de la proteína usando niveles altos de energía y obtención de la relación optima energía digestible/proteína digestible en dietas para el crecimiento de <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L) / Protein-sparing effect with high energy levels and obtaining the optimum digestible energy/digestible protein ratio in growth diets to <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (L.)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Peru | Language: Spanish Abstract in spanish Se evaluó el efecto ahorrativo de la proteína usando dietas altas en energía. Se utilizó un diseño factorial para medir la interacción de dos niveles de proteína (30% y 35%) y dos niveles de energía digestible (3.3 y 3.7 kcal/g de alimento) sobre la ganancia (GP), conversión alimenticia (CA), proteí [...] na retenida (PR), energía retenida (ER) y la relación de eficiencia proteica (REP) en la tilapia del Nilo todos machos (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). En la composición de las dietas se emplearon harina de anchoveta y harina de torta de soya como fuentes de proteína y maíz amarillo duro y subproducto de trigo como fuentes de energía. El aceite de pescado fue añadido para ajustar los niveles de energía requeridos en las dietas experimentales. Se encontraron interacciones altamente significativas (P Abstract in english The sparing effect of the dietary protein using diets with high energy levels was evaluated. A factorial design was used to examine the interaction of two levels of protein (30 and 35%) and two levels of digestible energy (3.3 and 3.7 kcal/g) on the weight gain (WG), food conversion FC), retained pr [...] otein (PR), retained energy (ER) and protein efficiency ratio (PER) in ?sex reversal Nile tilapia? ( <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>). Diets contained anchovy and soybean meal as protein sources and yellow corn and wheat bran as energy sources. The <span class="hlt">fish</span> oil was used to adjust the energy levels. There were highly significant interactions (P</p> <div class="credits"> <p class="dwt_author">Gutierrez, Felix Walter; Quispe, Máximo; Valenzuela, Luz.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">319</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000400038"> <span id="translatedtitle">Coeficientes de digestibilidade aparente da energia e proteína da silagem de sorgo com alto e baixo tanino pela tilápia do nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> Apparent digestibility coefficients of energy and protein of low and high tannin silage sorghum for nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Este estudo foi realizado para determinar o coeficiente de digestibilidade aparente (CDA da energia bruta e proteína bruta da silagem de sorgo de baixo tanino (SSBT e da silagem de sorgo de alto tanino (SSAT para a tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. A ração referência foi misturada aos ingredientes-teste na proporção de 60:40. Os peixes (53,26 ± 12,94g foram alimentados até a saciedade aparente e as fezes foram coletadas após sedimentação. A fibra em detergente neutro foi utilizada como indicador endógeno. Os CDA da energia bruta e proteína bruta da SSBT e SSAT variaram entre 70,17 e 68,37% e 84,94 e 82,40%, respectivamente. Os valores de energia digestível foram de 3049,81 e 2954,74kcal kg-1 para SSBT e SSAT, respectivamente. A SSBT apresentou valores significa-tivamente (PThis study was carried out to determine the apparent digestibility coefficients (ADC of gross energy and crude protein of low tannin silage sorghum (LTSS and high tannin silage sorghum (HTSS for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>. The reference diet was mixed with test ingredients in a 60:40 ratio. <span class="hlt">Fish</span> (53.26 ± 12.94g were fed to apparent satiation and faeces were collected other sedimentation The neutral detergent fiber was used as an endogenous indicator. ADC for gross energy and crude protein of LTSS and HTSS varied between 70.17 and 68.37% and 84.94 and 82.40%, respectively. Digestible energy values were 3,049.81 and 2,954.74kcal kg-1 for LTSS and HTSS, respectively. LTSS produced significantly (P<0.05 higher energy and protein digestibilities than HTSS. Results indicated that Nile tilapia can utilize the gross energy and crude protein of sorghum silage efficiently.</p> <div class="credits"> <p class="dwt_author">Wilson Massamitu Furuya</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-08-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">320</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://docsdrive.com/pdfs/ansinet/pjbs/2001/618-620.pdf"> <span id="translatedtitle">An Evaluation of Wolffia Meal (Wolffia arrhiza in Replacing Soybean Meal in Some Formulated Rations of Nile Tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available An investigation on the evaluation of Wolffia meal being used as a replacement material for soybean meal in ration of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> was carried out at Khon Kaen University, Khon Kaen 40002, Thailand. The two experiments were laid in a randomized complete block design with three replications and they were carried out in a laboratory. The results showed that digestibility of fresh Wolffia by Nile tilapia fingerlings (2.5 g and Nile tilapia adults (40-50 g were not significantly differed from each other. Growth performance of Nile tilapia adults with respect to percentages of weight, length, feed intake, feed conversion ratio, protein efficiency ratio, net protein utilization and specific growth rate were not statisticaly significant in all levels of Wolffia. However, the highest total production occurred in <span class="hlt">fish</span> being fed on formulated ration containing 15% Wolffia meal. An increase in Wolffia meal beyond 15 % in the formulated ration decreased the survival rate and total production of the cultured <span class="hlt">fish</span>. Wolffia meal could be successfully used in place of soybean meal but the amount being used should not exceede 15 %.</p> <div class="credits"> <p class="dwt_author">N. Chareontesprasit</p> <p class="dwt_publisher"></p> <p class="publishDate">2001-01-01</p> </div> </div> </div> </div> <div id="filter_results_form" class="filter_results_form floatContainer" style="visibility: visible;"> <div style="width:90%" id="PaginatedNavigation" class="paginatedNavigationElement"> <a id="FirstPageLink" onclick='return showDiv("page_1");' href="#" title="First Page"> <img id="FirstPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.first.18x20.png" alt="First Page" /></a> <a id="PreviousPageLink" onclick='return showDiv("page_15");' href="#" title="Previous Page"> <img id="PreviousPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.previous.18x20.png" alt="Previous Page" /></a> <span id="PageLinks" class="pageLinks"> <span> <a onClick='return showDiv("page_1");' href="#">1</a> <a onClick='return showDiv("page_2");' href="#">2</a> <a onClick='return showDiv("page_3");' href="#">3</a> <a onClick='return showDiv("page_4");' href="#">4</a> <a onClick='return showDiv("page_5");' href="#">5</a> <a onClick='return showDiv("page_6");' href="#">6</a> <a onClick='return showDiv("page_7");' href="#">7</a> <a onClick='return showDiv("page_8");' href="#">8</a> <a onClick='return showDiv("page_9");' href="#">9</a> <a onClick='return showDiv("page_10");' href="#">10</a> <a onClick='return showDiv("page_11");' href="#">11</a> <a onClick='return showDiv("page_12");' href="#">12</a> <a onClick='return showDiv("page_13");' href="#">13</a> <a onClick='return showDiv("page_14");' href="#">14</a> <a onClick='return showDiv("page_15");' href="#">15</a> <a style="font-weight: bold;">16</a> <a onClick='return showDiv("page_17");' href="#">17</a> <a onClick='return showDiv("page_18");' href="#">18</a> <a onClick='return showDiv("page_19");' href="#">19</a> <a onClick='return showDiv("page_20");' href="#">20</a> <a onClick='return showDiv("page_21");' href="#">21</a> <a onClick='return showDiv("page_22");' href="#">22</a> <a onClick='return showDiv("page_23");' href="#">23</a> <a onClick='return showDiv("page_24");' href="#">24</a> <a onClick='return showDiv("page_25");' href="#">25</a> </span> </span> <a id="NextPageLink" onclick='return showDiv("page_17");' href="#" title="Next Page"> <img id="NextPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.next.18x20.png" alt="Next Page" /></a> <a id="LastPageLink" onclick='return showDiv("page_25.0");' href="#" title="Last Page"> <img id="LastPageLinkImage" class="Icon" src="http://worldwidescience.org/wws/images/icon.last.18x20.png" alt="Last Page" /></a> </div> <div id="refine_search_form_div" style="right:140px"> <form id="simple_search_form" method="post" action="http://worldwidescience.org/cgi-bin/wwsproxy.pl" onsubmit="return ValidationUtils.validateSimpleSearch('refine_search_terms');"> <input name="viewId" value="view0" type="hidden" /><input name="ssid" value="" type="hidden" /> <input id="search_terms" name="expression" value="fish oreochromis niloticus" class="TextInput" type="text" style="width:250; 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height:17pt"/> <input name="ssid" value="" type="hidden" /><button type="submit" class="search_submit" id="search_submit" title="New Search">Search</button> </form>  <br>  </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">321</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/21250483"> <span id="translatedtitle">[Centrocestus formosanus (Opisthorchiida: Heterophyidae) as a cause of death in gray tilapia fry <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciforme: Cichlidae) in the dry Pacific of Costa Rica].</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Centrocestusformosanus is a zoonotic trematode from Asia and has been mainly associated as cause of death of cultured <span class="hlt">fish</span>. To identify pathogen trematode species in tilapia fry (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and to determine mollusks hosting these parasites, freshwater mollusks were collected from tilapia cultured ponds and experimental infections were carried out with tilapia fries and different mollusk species. A total of 907 freshwater mollusks were obtained from tilapia ponds and were identified to species level, four gastropods and one bivalve were determined: Melania tuberculata, Melanoides turricula, Pomacea flagellata, Haitia cubensis and Anodontiles luteola. For the first time, the presence of M. turricula and H. cubensis are reported in Costa Rica. Seven morphotypes of cercariae (Xifiodiocercaria, Equinostoma, Oftalmocercaria, Parapleurolofocercus, Cistocerca, Furcocercaria and Leptocercaria) parasitizing all five species of mollusks were found, all of distome type. Experimental exposure of tilapia fry to M. tuberculata demonstrated that the parapleurolofocercus morphotype found in the mollusk is in accordance with the finding of C. formosanus in tilapia fry. An abundance and mean intensity of 1018-1027 digeneans per gill in each exposed <span class="hlt">fish</span> was determined. Centrocestus formosanus is reported for the first time in Costa Rica, for which the primary and secondary intermediate hosts were also determined. PMID:21250483</p> <div class="credits"> <p class="dwt_author">Arguedas Cortés, Donald; Dolz, Gaby; Romero Zúñiga, Juan J; Jiménez Rocha, Ana E; León Alán, Dennis</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">322</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/23876999"> <span id="translatedtitle">Cloning and molecular characterization of complement component 1 inhibitor (C1INH) and complement component 8? (C8?) in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>), one of the most important groups of food <span class="hlt">fishes</span> in the world, has frequently suffered from serious challenge from pathogens in recent years. Immune responses of Nile tilapia should be understood to protect the aquaculture industry of this <span class="hlt">fish</span>. The complement system has an important function in recognizing bacteria, opsonizing these pathogens by phagocytes, or killing them by direct lysis. In this study, two Nile tilapia complement component genes, complement component 1 inhibitor (C1INH) and complement component 8? subunit (C8?), were cloned and their expression characteristics were analyzed. C1INH cDNA was found containing a 1791 bp open reading frame (ORF) encoding a putative protein with 597 amino acids, a 101 bp 5'-untranslated region (UTR) and a 236 bp 3'-UTR. The predicted protein structure for this gene consisted of two Ig-like domains and glycosyl hydrolase family-9 active site signature 2. The C8? cDNA consisted of a 1761 bp ORF encoding 587 amino acids, a 15 bp 5'-UTR and a 170 bp 3'-UTR. The predicted protein of C8? contained three motifs, thrombospondin type-1 repeat, membrane attack complex/perforin domain, and LDL-receptor class A. Expression analysis revealed that these two complement genes were highly expressed in the liver, however, were weakly expressed in the gill, heart, brain, kidney, intestine, spleen and dorsal muscle tissues. The present study provided insights into the complement system and immune functions of Nile tilapia. PMID:23876999</p> <div class="credits"> <p class="dwt_author">He, Anyuan; Yang, Jie; Tang, Shoujie; Wang, Chenghui</p> <p class="dwt_publisher"></p> <p class="publishDate">2013-09-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">323</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442010000400031"> <span id="translatedtitle">Centrocestus formosanus (Opisthorchiida: Heterophyidae como causa de muerte de alevines de tilapia gris <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciforme: Cichlidae en el Pacífico seco de Costa Rica</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Centrocestus formosanus es un parásito trematodo zoonótico originario de Asia asociado con muertes de peces principalmente de cultivo. 907 moluscos provenientes de estanques sembrados con tilapias, seleccionados uno por provincia fueron identificados al nivel taxonómico especifico. Se identificaron cuatro gastrópodos y un bivalvo: M. tuberculata, M. turricula, P. flagellata, H. cubensis y A. luteola. Se reporta, por primera vez, la presencia de dos especies de moluscos en Costa Rica. Se identificaron siete morfotipos de cercarias parasitando las cinco especies de moluscos encontradas. En la segunda exposición experimental se demostró que el morfotipo parapleurolofocercus encontrado en M. tuberculata concuerda con el hallazgo de C. formosanus en alevines de tilapia, después del examen clínico, anatomopatológico y parasitológico realizado a los alevines expuestos. Las metacercarias fueron extraídas del quiste utilizando microagujas y micropinzas lavadas en solución salina fisiológica (0.65%, fijadas en formol caliente al 4% y después esquematizadas con una cámara clara adaptada a un microscopio fotónico, estimándose una abundancia e intensidad media de 1018-1027 digeneos por branquia en cada pez parasitado, determinándose así el hospedador intermediario primario y secundario del parásito. En el presente trabajo se reporta por primera vez Centrocestus formosanus en Costa Rica.Centrocestus formosanus (Opisthorchiida: Heterophyidae as a cause of death in gray tilapia fry <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciforme: Cichlidae in the dry Pacific of Costa Rica. Centrocestus formosanus is a zoonotic trematode from Asia and has been mainly associated as cause of death of cultured <span class="hlt">fish</span>. To identify pathogen trematode species in tilapia fry (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and to determine mollusks hosting these parasites, freshwater mollusks were collected from tilapia cultured ponds and experimental infections were carried out with tilapia fries and different mollusk species. A total of 907 freshwater mollusks were obtained from tilapia ponds and were identified to species level, four gastropods and one bivalve were determined: Melania tuberculata, Melanoides turricula, Pomacea flagellata, Haitia cubensis and Anodontiles luteola. For the first time, the presence of M. turricula and H. cubensis are reported in Costa Rica. Seven morphotypes of cercariae (Xifiodiocercaria, Equinostoma, Oftalmocercaria, Parapleurolofocercus, Cistocerca, Furcocercaria and Leptocercaria parasitizing all five species of mollusks were found, all of distome type. Experimental exposure of tilapia fry to M. tuberculata demonstrated that the parapleurolofocercus morphotype found in the mollusk is in accordance with the finding of C. formosanus in tilapia fry. An abundance and mean intensity of 1018-1027 digeneans per gill in each exposed <span class="hlt">fish</span> was determined. Centrocestus formosanus is reported for the first time in Costa Rica, for which the primary and secondary intermediate hosts were also determined. Rev. Biol. Trop. 58 (4: 1453-1465. Epub 2010 December 01.</p> <div class="credits"> <p class="dwt_author">Donald Arguedas Cortés</p> <p class="dwt_publisher"></p> <p class="publishDate">2010-12-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">324</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442010000400031&lang=en"> <span id="translatedtitle">Centrocestus formosanus (Opisthorchiida: Heterophyidae) como causa de muerte de alevines de tilapia gris <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciforme: Cichlidae) en el Pacífico seco de Costa Rica</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Costa Rica | Language: Spanish Abstract in spanish Centrocestus formosanus es un parásito trematodo zoonótico originario de Asia asociado con muertes de peces principalmente de cultivo. 907 moluscos provenientes de estanques sembrados con tilapias, seleccionados uno por provincia fueron identificados al nivel taxonómico especifico. Se identificaron [...] cuatro gastrópodos y un bivalvo: M. tuberculata, M. turricula, P. flagellata, H. cubensis y A. luteola. Se reporta, por primera vez, la presencia de dos especies de moluscos en Costa Rica. Se identificaron siete morfotipos de cercarias parasitando las cinco especies de moluscos encontradas. En la segunda exposición experimental se demostró que el morfotipo parapleurolofocercus encontrado en M. tuberculata concuerda con el hallazgo de C. formosanus en alevines de tilapia, después del examen clínico, anatomopatológico y parasitológico realizado a los alevines expuestos. Las metacercarias fueron extraídas del quiste utilizando microagujas y micropinzas lavadas en solución salina fisiológica (0.65%), fijadas en formol caliente al 4% y después esquematizadas con una cámara clara adaptada a un microscopio fotónico, estimándose una abundancia e intensidad media de 1018-1027 digeneos por branquia en cada pez parasitado, determinándose así el hospedador intermediario primario y secundario del parásito. En el presente trabajo se reporta por primera vez Centrocestus formosanus en Costa Rica. Abstract in english Centrocestus formosanus (Opisthorchiida: Heterophyidae) as a cause of death in gray tilapia fry <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (Perciforme: Cichlidae) in the dry Pacific of Costa Rica. Centrocestus formosanus is a zoonotic trematode from Asia and has been mainly associated as cause of death of cultured <span class="hlt">fish</span>. [...] To identify pathogen trematode species in tilapia fry (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and to determine mollusks hosting these parasites, freshwater mollusks were collected from tilapia cultured ponds and experimental infections were carried out with tilapia fries and different mollusk species. A total of 907 freshwater mollusks were obtained from tilapia ponds and were identified to species level, four gastropods and one bivalve were determined: Melania tuberculata, Melanoides turricula, Pomacea flagellata, Haitia cubensis and Anodontiles luteola. For the first time, the presence of M. turricula and H. cubensis are reported in Costa Rica. Seven morphotypes of cercariae (Xifiodiocercaria, Equinostoma, Oftalmocercaria, Parapleurolofocercus, Cistocerca, Furcocercaria and Leptocercaria) parasitizing all five species of mollusks were found, all of distome type. Experimental exposure of tilapia fry to M. tuberculata demonstrated that the parapleurolofocercus morphotype found in the mollusk is in accordance with the finding of C. formosanus in tilapia fry. An abundance and mean intensity of 1018-1027 digeneans per gill in each exposed <span class="hlt">fish</span> was determined. Centrocestus formosanus is reported for the first time in Costa Rica, for which the primary and secondary intermediate hosts were also determined. Rev. Biol. Trop. 58 (4): 1453-1465. Epub 2010 December 01.</p> <div class="credits"> <p class="dwt_author">Arguedas Cortés, Donald; Dolz, Gaby; Romero Zúñiga, Juan J; Jiménez Rocha, Ana E; León Alán, Dennis.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">325</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/24012383"> <span id="translatedtitle">Enzymatic characterizations and activity regulations of N-acetyl-?-D-glucosaminidase from the spermary of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">N-Acetyl-?-D-glucosaminidase (NAGase) is proved to be correlated with reproduction of male animals. In this study, enzymatic characterizations of NAGase from spermary of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) were investigated in order to further study its reproductive function in <span class="hlt">fish</span>. Tilapia NAGase was purified to be PAGE homogeneous by the following techniques: (NH4)2SO4 fractionation (40-55%), DEAE-cellulose (DE-32) ion exchange chromatography, Sephadex G-200 gel filtration and DEAE-Sephadex (A-50). The specific activity of the purified enzyme was 4100 U/mg. The enzyme molecular weight was estimated as 118.0 kD. Kinetic studies showed that the hydrolysis of p-nitrophenyl-N-acetyl-?-D-glucosaminide (pNP-NAG) by the enzyme followed Michaelis-Menten kinetics. The Michaelis-Menten constant (Km) and maximum velocity (Vm) were determined to be 0.67 mM and 23.26 ?M/min, respectively. The optimum pH and optimum temperature of the enzyme for hydrolysis of pNP-NAG was to be at pH 5.7 and 55°C, respectively. The enzyme was stable in a pH range from 3.3 to 8.1 at 37°C, and inactive at temperature above 45°C. The enzyme activity was regulated by the following ions in decreasing order: Hg(2+) > Zn(2+) > Cu(2+) > Pb(2+) > Mn(2+). The IC50 of Cu(2+), Zn(2+) and Hg(2+) was 1.23, 0.28, and 0.0027 mM, respectively. However, the ions Li(+), Na(+), K(+), Mg(2+) and Ca(2+) had almost no influence on enzyme activity. In conclusion, the enzymatic characterizations of NAGase from tilapia were special to the other animals, which were correlated with its living habit; besides, CuSO4 and ZnSO4 should used very carefully as insecticides in tilapia cultivation since they both had strong regulations on the enzyme. PMID:24012383</p> <div class="credits"> <p class="dwt_author">Zhang, Wei-Ni; Bai, Ding-Ping; Huang, Yi-Fan; Hu, Chong-Wei; Chen, Qing-Xi; Huang, Xiao-Hong</p> <p class="dwt_publisher"></p> <p class="publishDate">2014-02-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">326</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.ncbi.nlm.nih.gov/pubmed/22745188"> <span id="translatedtitle">Differential expression patterns of growth-related microRNAs in the skeletal muscle of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>).</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.science.gov/">Science.gov (United States)</a></p> <p class="result-summary">MicroRNA (miRNA) are a class of small, single-stranded, non-coding RNA that regulate mRNA expression at the post-transcriptional level and play important roles in many fundamental biological processes. There is emerging evidence that miRNA are critical regulators of widespread cellular functions, such as differentiation, proliferation, and migration. At present, little is known about miRNA expression profiles related to skeletal muscle growth in aquatic organisms. This study aimed to investigate the phenotypic variation in the body growth of the Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) and to identify and quantify the differential expression levels of selected growth-related transcriptomic miRNA in the skeletal muscle of this <span class="hlt">fish</span>. To this end, we performed next-generation sequencing to define the full miRNA transcriptome in muscle tissue from Nile tilapia and to detect differentially expressed miRNA between 2 strains of Nile tilapia. These tilapia strains exhibited significant (P DNA (mtDNA) haplotype diversity, and the differential expression of selected growth-related genes. The results obtained from the transcriptome analysis and real-time quantitative reverse transcription PCR (qRT-PCR) revealed significant differences in miRNA expression between fast-growing and control strains of tilapia. Digital gene expression (DGE) profiling was performed based on the obtained read abundance, and we identified down-regulated miRNA, including let-7j, miR-140, miR-192, miR-204, miR-218a, miR-218b, miR-301c, and miR-460, and up-regulated miRNA, including let-7b, let-7c, miR-133, miR-152, miR-15a, miR-193a, miR-30b, and miR-34, associated with body growth in tilapia. These results were further validated using real-time qRT-PCR and microarray profiling. In summary, the up- and down-regulation of miRNA involved in the GH/IGF-1 axis signaling pathway suggests that the differential expression levels of growth-related miRNA may serve as molecular markers that are predictive of specific functional and diagnostic implications. The obtained data on genetic polymorphisms in miRNA-target interactions are particularly useful for Nile tilapia breeding programs. PMID:22745188</p> <div class="credits"> <p class="dwt_author">Huang, C W; Li, Y H; Hu, S Y; Chi, J R; Lin, G H; Lin, C C; Gong, H Y; Chen, J Y; Chen, R H; Chang, S J; Liu, F G; Wu, J L</p> <p class="dwt_publisher"></p> <p class="publishDate">2012-12-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">327</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1716"> <span id="translatedtitle">Complexo zinco aminoácido em dietas práticas para a tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> - DOI: 10.4025/actascianimsci.v26i4.1716 Zinc-amino acid complex in practical diets for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> - DOI: 10.4025/actascianimsci.v26i4.1716</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available As dietas balanceadas para piscicultura são suplementadas com fonte inorgânica de zinco, sendo o óxido de zinco (ZnO a fonte mais utilizada no Brasil. Complexos organometálicos, contudo, podem aumentar a absorção do mineral no trato digestório. Nesse sentido, comparou-se os efeitos de um complexo zinco-aminoácido (Zn-AA sobre o desempenho produtivo e a composição da carcaça de alevinos de tilápia do Nilo, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., em relação ao verificado com o uso do ZnO. Dietas experimentais, isoprotéicas e isocalóricas, à base de farelo de soja e fubá de milho, foram fornecidas aos peixes durante 75 dias, sendo suplementadas com 30, 90, 150 ou 210mg Zn/kg, a partir do ZnO ou do Zn-AA. Os peixes (1,79 ± 0,10g foram distribuídos em 36 caixas de água de 250L, sendo alimentados ad libitum, quatro vezes ao dia. Ao final do período experimental, os peixes alimentados com as dietas suplementadas com ZnO, independentemente do nível de suplementação, apresentaram ganho em peso significativamente maior que os animais arraçoados com as dietas contendo Zn-AA (P0,05. Os resultados do presente trabalho permitem concluir que, em relação ao observado com o uso do ZnO, o Zn-AA acarretou pior desempenho produtivo nos peixes estudados.Commercial diets for <span class="hlt">fish</span> culture are supplemented with an inorganic zinc sources. Zinc oxide (ZnO is the most utilized Zn supplementation in Brazil. However, organic metal complexes may increase mineral absorption in the digestive tract. Based on this knowledge, the effects of a amino acid zinc complex (Zn-AA upon growth performance and carcass composition of Nile tilapia, <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L., fingerlings, were compared to the ones observed for ZnO. Isoproteic and isoenergetic soybean meal/corn-based diets were offered to <span class="hlt">fish</span> for 75 days, supplemented with 30, 90, 150 or 210mg Zn/kg, from ZnO or Zn-AA. <span class="hlt">Fish</span> (1.79 ± 0.10g were allocated in thirty six 250-L tanks, and fed ad libitum four times a day. <span class="hlt">Fish</span> fed with ZnO-supplemented diets, regardless of the supplementation level, showed a significantly higher weight gain than the animals fed with Zn-AA-supplemented diets (P0.05 for different experimental treatments. The experiment showed that Zn-AA supplementation produced worse <span class="hlt">fish</span> growth performance than ZnO.</p> <div class="credits"> <p class="dwt_author">Marcelo Vinícius do Carmo e Sá</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-04-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">328</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/2296"> <span id="translatedtitle">Tilapia by-product meal in rations for Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings/ Farinha de resíduos da filetagem de tilápia em rações para alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span></span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Objectifying to evaluate the inclusion of tilapia processing residues (FT in the feeding of Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> fingerlings, 125 Nile tilapia fingerlings (with average initial weight of 0.72±0.19g were distributed in a completely randomized design with five treatments and five repetitions in 25 aquariums (30L. The rations were formulated to contain 0, 5, 10, 15% of FT and 0% FT plus methionine (0+met. Isoproteics, isocalcitics, isophosphorics and isoenergetics diets were used. After 28 days of experiment, final weight (PF, weight gain (GP, feed conversion ratio (CA and survival (SO, were evaluated. No differences were observed (P>0.05 for the studied parameters. It was concluded that the FT can be used up to 15% in substitution to the soybean meal in the diet of nile tilapia fingerlings.Objetivando avaliar a inclusão de farinha de resíduos da filetagem de tilápias (FT na alimentação de alevinos de tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>, foram utilizados 125 alevinos de tilápia do Nilo com peso inicial médio de 0,72±0,19g, distribuídos em um delineamento inteiramente casualizado com cinco tratamentos e cinco repetições, em 25 aquários (30L cada. As rações foram formuladas de forma a conterem 0, 5, 10, 15% de FT e 0% de FT mais metionina (0+met, sendo as mesmas isoenergéticas isoprotéicas, isocalcíticas e isofosfóricas. Após 28 dias de experimento foram avaliados as médias de peso final (PF, ganho de peso (GP, conversão alimentar aparente (CA e sobrevivência (SO. Não foram observadas diferenças (P>0,05 entre os parâmetros avaliados. Conclui-se que a FT pode ser utilizada em até 15% em substituição ao farelo de soja em rações para alevinos de tilápia sem causar prejuízo ao seu desempenho.</p> <div class="credits"> <p class="dwt_author">Adilson Reidel</p> <p class="dwt_publisher"></p> <p class="publishDate">2005-06-01</p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">329</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.org.pe/scielo.php?script=sci_arttext&pid=S1726-46342008000100008&lang=en"> <span id="translatedtitle">Efecto Genotóxico del Dicromato de Potasio EnEritrocitos de sangre periférica de <span class="hlt">OreochromisNiloticus</span> (Tilapia) / Genoto xic efect of potassium dicromate in Peripherals blod eryt hrocytes of <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> (TILAPIA)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Peru | Language: Spanish Abstract in spanish Existen múltiples reportes del efecto genotóxico y cancerígeno del cromo VI, los seres humanos tenemos una permanente exposición a este elemento. Objetivos. Evidencias la genotoxicidad del dicromato de potasio utilizando como sistema biológico a <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> "tilapia", mediante el test de m [...] icronúcleos y la cuantificación de nuclear buds, en eritrocitos de sangre periférica. Materiales y métodos. Los individuos fueron expuestos a concentraciones crecientes (0,0, 0,2, 0,4 y 0,8 ppm) de dicromato de potasio. Se obtuvieron muestras de sangre periférica, del arco branquial de cada individuo (cuatro por grupo), a los tres y siete días de tratamiento, las cuales fueron procesadas y coloreadas con Giemsa 5% y se cuantificaron eritrocitos con micronúcleos y nuclear buds en sangre periférica. Resultados. Se encontró un incremento significativo de las frecuencias de micronúcleos y nuclear buds directamente proporcional a la concentración del dicromato de potasio en los individuos expuestos (p Abstract in english ABSTRACT Due multiple reports of the genotoxic and carcinogenic effect of chromium VI and the permanent exposure of the human beings to this element. Objective. Contributing new evidence of the genotoxicity of potassium dichromate using the biological system <span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> "tilapia" through t [...] he micronucleus test and the nuclear quantification of buds in erythrocytes of peripheral blood. Material and methods. The individuals were exposed to increasing concentrations (0.0, 0.2, 0.4 and 0.8 ppm) of potassium dichromate. Peripheral blood samples of the branchial arc of each individual were taken at 3th and 7th day of treatment which were processed and colored with Giemsa 5%, erythrocytes in peripheral blood with micronuclei and nuclear buds were quantified. Results. A significant increase of frequencies of micronucleus and nuclear buds in the exposed individuals were registered which were directly proportional to the potassium dichromate concentration (p</p> <div class="credits"> <p class="dwt_author">Zulita, Prieto; Julio, León-Incio; Carlos, Quijano-Jara; Radigud, Fernández; Edgardo, Polo-Benites; Roger, Vallejo-Rodríguez; Luis, Villegas-Sanchez.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">330</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000500015&lang=en"> <span id="translatedtitle">Localization of acid phosphatase activity in the testis of two teleostean species (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Odonthestes perugiae) / Localização da atividade da fosfatase ácida em duas espécies de teleósteos (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> e Odonthestes perugiae)</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.scielo.org/php/index.php?lang=en">Scientific Electronic Library Online (English)</a></p> <p class="result-summary">Full Text Available SciELO Brazil | Language: English Abstract in portuguese A atividade da fosfatase ácida (AcP) foi estudada em duas espécies de teleósteos em duas estações: verão e inverno. A atividade AcP foi detectada em células de Sertoli de tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) somente durante o período não reprodutivo de seu ciclo anual, que corresponde aos meses de invern [...] o. Em peixe-rei (Odonthestes perugiae), a reação enzimática foi detectada durante o período não reprodutivo (verão) nas células epiteliais dos dutos eferentes, porém não foi detectada nas células de Sertoli. Esses dados sugerem que essa enzima está envolvida no processo de reabsorção do citoplasma residual das espermátides e também na remoção dos espermatozóides remanescentes do período reprodutivo. Em peixe-rei, essa função heterofágica é realizada pelas células dos dutos eferentes e não pelas células de Sertoli. Abstract in english Acid phosphatase (AcP) activity was investigated in the testes of two species of teleosts in two seasons: summer and winter. AcP activity was detected in Sertoli cells from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span>) only during the nonreproductive period of its annual cycle, corresponding to the winter months. [...] In kingfish (Odonthestes perugiae), the enzymatic reaction was identified during the non-reproductive period (summer) in epithelial cells of the efferent ducts but not in Sertoli cells. These data suggest that the enzyme is involved in the absorption of residual spermatid cytoplasm and as well as in the removal of spermatozoa remaining after the reproductive period. In kingfish, this heterophagous function is carried out by the efferent duct cells and not by Sertoli cells.</p> <div class="credits"> <p class="dwt_author">M., Porawski; G. F., Wassermann; M., Achaval.</p> <p class="dwt_publisher"></p> <p class="publishDate"></p> </div> </div> </div> </div> <div class="floatContainer result odd" lang="en"> <div class="resultNumber element">331</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000500015"> <span id="translatedtitle">Localization of acid phosphatase activity in the testis of two teleostean species (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> and Odonthestes perugiae Localização da atividade da fosfatase ácida em duas espécies de teleósteos (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> e Odonthestes perugiae</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchArticles">Directory of Open Access Journals (Sweden)</a></p> <p class="result-summary">Full Text Available Acid phosphatase (AcP activity was investigated in the testes of two species of teleosts in two seasons: summer and winter. AcP activity was detected in Sertoli cells from tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> only during the nonreproductive period of its annual cycle, corresponding to the winter months. In kingfish (Odonthestes perugiae, the enzymatic reaction was identified during the non-reproductive period (summer in epithelial cells of the efferent ducts but not in Sertoli cells. These data suggest that the enzyme is involved in the absorption of residual spermatid cytoplasm and as well as in the removal of spermatozoa remaining after the reproductive period. In kingfish, this heterophagous function is carried out by the efferent duct cells and not by Sertoli cells.A atividade da fosfatase ácida (AcP foi estudada em duas espécies de teleósteos em duas estações: verão e inverno. A atividade AcP foi detectada em células de Sertoli de tilápia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> somente durante o período não reprodutivo de seu ciclo anual, que corresponde aos meses de inverno. Em peixe-rei (Odonthestes perugiae, a reação enzimática foi detectada durante o período não reprodutivo (verão nas células epiteliais dos dutos eferentes, porém não foi detectada nas células de Sertoli. Esses dados sugerem que essa enzima está envolvida no processo de reabsorção do citoplasma residual das espermátides e também na remoção dos espermatozóides remanescentes do período reprodutivo. Em peixe-rei, essa função heterofágica é realizada pelas células dos dutos eferentes e não pelas células de Sertoli.</p> <div class="credits"> <p class="dwt_author">M. Porawski</p> <p class="dwt_publisher"></p> <p class="publishDate">2004-11-01</p> </div> </div> </div> </div> <div class="floatContainer result " lang="en"> <div class="resultNumber element">332</div> <div class="resultBody element"> <p class="result-title"><a target="resultTitleLink" href="http://worldwidescience.org/wws/link.html?type=RESULT&redirectUrl=http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2452"> <span id="translatedtitle">Avaliação de dois métodos de determinação do coeficiente de digestibilidade aparente com a tilápia do Nilo (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L. Evaluation of two methods to determine the digestibility apparent coefficients in Nile tilapia (<span class="hlt">Oreochromis</span> <span class="hlt">niloticus</span> L.</span></a>  </p> <div class="result-meta"> <p class="source"><a target="_blank" id="logoLink" href="http://www.doaj.org/doaj?func=searchAr