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Sample records for longtail tuna thunnus

  1. Cytochrome Oxidase I (COI) sequence conservation and variation patterns in the yellowfin and longtail tunas

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar

    within and between tuna Thunnus species and its application to species identification. J Fish Biol. 58, 1646–1657. 8 Terol, J., Mascarell, R., Fernandez-Pedrosa, V., Perez-Alonso, M. (2002) Statistical validation of the identification of tuna...

  2. Development of a qPCR Method for the Identification and Quantification of Two Closely Related Tuna Species, Bigeye Tuna (Thunnus obesus) and Yellowfin Tuna (Thunnus albacares), in Canned Tuna.

    Science.gov (United States)

    Bojolly, Daline; Doyen, Périne; Le Fur, Bruno; Christaki, Urania; Verrez-Bagnis, Véronique; Grard, Thierry

    2017-02-01

    Bigeye tuna (Thunnus obesus) and yellowfin tuna (Thunnus albacares) are among the most widely used tuna species for canning purposes. Not only substitution but also mixing of tuna species is prohibited by the European regulation for canned tuna products. However, as juveniles of bigeye and yellowfin tunas are very difficult to distinguish, unintentional substitutions may occur during the canning process. In this study, two mitochondrial markers from NADH dehydrogenase subunit 2 and cytochrome c oxidase subunit II genes were used to identify bigeye tuna and yellowfin tuna, respectively, utilizing TaqMan qPCR methodology. Two different qPCR-based methods were developed to quantify the percentage of flesh of each species used for can processing. The first one was based on absolute quantification using standard curves realized with these two markers; the second one was founded on relative quantification with the universal 12S rRNA gene as the endogenous gene. On the basis of our results, we conclude that our methodology could be applied to authenticate these two closely related tuna species when used in a binary mix in tuna cans.

  3. Atlantic Bluefin Tuna (Thunnus thynnus) Biometrics and Condition.

    Science.gov (United States)

    Rodriguez-Marin, Enrique; Ortiz, Mauricio; Ortiz de Urbina, José María; Quelle, Pablo; Walter, John; Abid, Noureddine; Addis, Piero; Alot, Enrique; Andrushchenko, Irene; Deguara, Simeon; Di Natale, Antonio; Gatt, Mark; Golet, Walter; Karakulak, Saadet; Kimoto, Ai; Macias, David; Saber, Samar; Santos, Miguel Neves; Zarrad, Rafik

    2015-01-01

    The compiled data for this study represents the first Atlantic and Mediterranean-wide effort to pool all available biometric data for Atlantic bluefin tuna (Thunnus thynnus) with the collaboration of many countries and scientific groups. Biometric relationships were based on an extensive sampling (over 140,000 fish sampled), covering most of the fishing areas for this species in the North Atlantic Ocean and Mediterranean Sea. Sensitivity analyses were carried out to evaluate the representativeness of sampling and explore the most adequate procedure to fit the weight-length relationship (WLR). The selected model for the WLRs by stock included standardized data series (common measurement types) weighted by the inverse variability. There was little difference between annual stock-specific round weight-straight fork length relationships, with an overall difference of 6% in weight. The predicted weight by month was estimated as an additional component in the exponent of the weight-length function. The analyses of monthly variations of fish condition by stock, maturity state and geographic area reflect annual cycles of spawning and feeding behavior. We update and improve upon the biometric relationships for bluefin currently used by the International Commission for the Conservation of Atlantic Tunas, by incorporating substantially larger datasets than ever previously compiled, providing complete documentation of sources and employing robust statistical fitting. WLRs and other conversion factors estimated in this study differ from the ones used in previous bluefin stock assessments.

  4. Effects of the North Atlantic Oscillation on Spanish catches of albacore, Thunnus alalunga, and yellowfin tuna, Thunnus albacares, in the North–east Atlantic Ocean

    Energy Technology Data Exchange (ETDEWEB)

    Rubio, C.J.; MacIas, D.; Camiñas, J.A.; Fernandez, I.L.; Baez, J.C.

    2016-07-01

    Tuna are highly migratory pelagic species (HMPS) with great importance in commercial fishing. Several authors have highlighted the effect of climatic oscillations such as the NAO (North Atlantic Oscillation) on HMPS. This paper analyzes the effects of the NAO on two HMPS: albacore, Thunnus alalunga, and yellowfin tuna, Thunnus albacares. Fishing data from the Spanish fleet operating in the North Atlantic area were obtained from the International Commission for the Conservation of Atlantic Tunas (ICCAT) database. The results show a positive correlation between the NAO index and the Catch per Unit Effort (CPUE) for both albacore and yellowfin tuna, depicting a potential effect on their capturability. (Author)

  5. DISTRIBUSI SPASIAL DAN TEMPORAL IKAN TUNA MATA BESAR (Thunnus obesus DI SAMUDERA HINDIA BAGIAN TIMUR

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    Irwan Jatmiko

    2016-03-01

    Full Text Available Ikan tuna mata besar (Thunnus obesus merupakan salah satu hasil tangkapan yang penting bagi industri perikanan di Indonesia. Penelitian ini bertujuan untuk mengetahui distribusi spasial dan temporal ikan tuna mata besar di Samudera Hindia Bagian Timur. Pengumpulan data dilakukan oleh pemantau ilmiah (scientific observers pada kapal rawai tuna yang berbasis di Pelabuhan Benoa Bali, mulai Agustus 2005 hingga November 2013. Ikan tuna mata besar yang tertangkap sebanyak 5.340 ekor dan dari jumlah tersebut sebanyak 5.253 ekor diukur panjangnya. Distribusi spasial ikan tuna mata besar yang tertangkap rawai tuna Indonesia membentang dari 0°-33° LS dan 76°-128° BT. Persentase tertinggi ikan tuna mata besar dengan panjang >110 cm (Lm terdapat di sebelah barat Sumatera Barat dan di sebelah selatan Jawa Timur. Laju pancing menurut bulan penagkapan menunjukkan perbedaan yang nyata dengan laju pancing tertinggi terjadi pada Agustus sebesar 0,54 ekor/100 mata pancing. Nelayan direkomendasikan untuk melakukan operasi penangkapan di daerah dengan persentase ukuran panjang ikan tuna mata besar >110 cm (Lm tertinggi, sehingga species tersebut mempunyai kesempatan untuk melakukan pemijahan minimal sekali sepanjang hidupnya. Hal ini dimaksudkan untuk menjaga kelestarian sumberdaya ikan tuna mata besar di Samudera Hindia. Big eye tuna (Thunnus obesus is one of the important catch of the fishing industry in Indonesia. The study is aimed to investigate the spatial and temporal distribution of big eye tuna in the Eastern Indian Ocean. Data were collected by scientific observers on tuna long line vessels which were mainly based in Port of Benoa Bali from August 2005 to November 2013. Total number of big eye tuna caught were 5,340 individuals and as many as 5,253 of them were measured in length. The spatial distribution of  big eye tuna caught by Indonesia tuna long line are in the area between 0°-33° S and 76°-128° E. The highest percentage of big eye tuna with

  6. Validation of the method spectrophotometer in the histamine determination in fresh tuna (Thunnus Tunna)

    International Nuclear Information System (INIS)

    Chacon Silva, F.

    1998-01-01

    The objective of this study was to validate the spectrophotometer method described by Bateman et al. (1994) for the histamine determination in fresh tuna (Thunnus Tunna) and to evaluate the histamine concentration in samples of fresh tuna. To fulfill the recently exposed objectives, the figures of merit were determined like they are it: recovery limits of detection, sensibility and repetitive of the method spectrophotometry and applied the analysis at twenty samples of fresh tuna for copy of the Metropolitan area and three sample like reference of fresh tuna stored 4 degree centigrade by 15 days. The histamine recovery you determines enriching seven ours of fresh tuna with histamine to two levels different 0.613 mg/L and 2.21 mg/L. three samples were left without enriching and you subtract the average to the native histamine. You determines the one it limits of detection using the standard deviation to three levels of concentration of histamine 1.37 mg/L, 2.22 mg/L and 3.22 mg/L, the minimum quantity of hi stamina that you can determine for the method spectrophotometry settling down. The repetitive you determines using the standard deviation for 100 among the average of the histamine values, in seven you replies independent of the same sample. You determines the histamine content, in the fresh tuna Thunnus Tunna of the expends of the Metropolitan Area and in samples of reference stored 4 degrees centigrade by 15 days [es

  7. Discrimination of juvenile yellowfin (Thunnus albacares and bigeye (T. obesus Tunas using mitochondrial DNA control region and liver morphology.

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    Ivane R Pedrosa-Gerasmio

    Full Text Available Yellowfin tuna, Thunnus albacares (Bonnaterre, 1788 and bigeye tuna, Thunnus obesus (Lowe, 1839 are two of the most economically important tuna species in the world. However, identification of their juveniles, especially at sizes less than 40 cm, is very difficult, often leading to misidentification and miscalculation of their catch estimates. Here, we applied the mitochondrial DNA control region D-loop, a recently validated genetic marker used for identifying tuna species (Genus Thunnus, to discriminate juvenile tunas caught by purse seine and ringnet sets around fish aggregating devices (FADs off the Southern Iloilo Peninsula in Central Philippines. We checked individual identifications using the Neighbor-Joining Method and compared results with morphometric analyses and the liver phenotype. We tested 48 specimens ranging from 13 to 31 cm fork length. Morpho-meristic analyses suggested that 12 specimens (25% were bigeye tuna and 36 specimens (75% were yellowfin tuna. In contrast, the genetic and liver analyses both showed that 5 specimens (10% were bigeye tuna and 43 (90% yellowfin tuna. This suggests that misidentification can occur even with highly stringent morpho-meristic characters and that the mtDNA control region and liver phenotype are excellent markers to discriminate juveniles of yellowfin and bigeye tunas.

  8. A validated methodology for genetic identification of tuna species (genus Thunnus.

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    Jordi Viñas

    2009-10-01

    Full Text Available Tuna species of the genus Thunnus, such as the bluefin tunas, are some of the most important and yet most endangered trade fish in the world. Identification of these species in traded forms, however, may be difficult depending on the presentation of the products, which may hamper conservation efforts on trade control. In this paper, we validated a genetic methodology that can fully distinguish between the eight Thunnus species from any kind of processed tissue.After testing several genetic markers, a complete discrimination of the eight tuna species was achieved using Forensically Informative Nucleotide Sequencing based primarily on the sequence variability of the hypervariable genetic marker mitochondrial DNA control region (mtDNA CR, followed, in some specific cases, by a second validation by a nuclear marker rDNA first internal transcribed spacer (ITS1. This methodology was able to distinguish all tuna species, including those belonging to the subgenus Neothunnus that are very closely related, and in consequence can not be differentiated with other genetic markers of lower variability. This methodology also took into consideration the presence of introgression that has been reported in past studies between T. thynnus, T. orientalis and T. alalunga. Finally, we applied the methodology to cross-check the species identity of 26 processed tuna samples.Using the combination of two genetic markers, one mitochondrial and another nuclear, allows a full discrimination between all eight tuna species. Unexpectedly, the genetic marker traditionally used for DNA barcoding, cytochrome oxidase 1, could not differentiate all species, thus its use as a genetic marker for tuna species identification is questioned.

  9. Trace elements in the kidney tissue of Bluefin Tuna ( Thunnus ...

    African Journals Online (AJOL)

    Trace elements, namely lead (Pb), copper (Cu), manganese (Mn), nickel (Ni), zinc (Zn), and iron (Fe), found in kidney tissues were analyzed and compared between wild/fattened and female/male bluefin tuna (BFT) in the Eastern Mediterranean region of Turkey. One hundred (that is, 50 female and 50 male) individual ...

  10. Screening of biodiesel production from waste tuna oil (Thunnus sp.), seaweed Kappaphycus alvarezii and Gracilaria sp.

    Science.gov (United States)

    Alamsjah, Mochammad Amin; Abdillah, Annur Ahadi; Mustikawati, Hutami; Atari, Suci Dwi Purnawa

    2017-09-01

    Biodiesel has several advantages over solar. Compared to solar, biodiesel has more eco-friendly characteristic and produces lower greenhouse gas emissions. Biodiesel that is made from animal fats can be produced from fish oil, while other alternative sources from vegetable oils are seaweed Kappaphycus alvarezii and Gracilaria sp. Waste tuna oil (Thunnus sp.) in Indonesia is commonly a side product of tuna canning industries known as tuna precook oil; on the other hand, seaweed Gracilaria sp. and Kappaphycus alvarezii are commonly found in Indonesia's seas. Seaweed waste that was used in the present study was 100 kg and in wet condition, and the waste oil was 10 liter. The seaweed was extracted with soxhletation method that used n-hexane as the solvent. To produce biodiesel, trans esterification was performed on the seaweed oil that was obtained from the soxhletation process and waste tuna oil. Biodiesel manufactured from seaweed K. alvarezii obtained the best score in flash point, freezing point, and viscosity test. However, according to level of manufacturing efficiency, biodiesel from waste tuna oil is more efficient and relatively easier compared to biodiesel from waste K. alvarezii and Gracilaria sp.

  11. Polimorfisme Enzim Glucose-6-Phosphate Isomerase pada Tiga Populasi Tuna Sirip Kuning (Thunnus albacares)

    OpenAIRE

    Permana, Gusti Ngurah; Hutapea, Jhon H.; Moria, Sari Budi; Haryanti, Haryanti

    2006-01-01

    Samples of yellowfin tuna (Thunnus albacares) were taken from three locations Bali, North Sulawesi and North Maluku. The glucose-6-phosphate isomerase (GPI) was analyzed from liver using allozyme electrophoresis method. Polymorphism of GPI enzyme was observed and four alleles (A, B ,C, D) were found in Bali population, three alleles (A,B,C) were found in North Maluku and North Sulawesi populations. Heterozygosity values, from Bali, North Maluku and North Sulawesi were 0.419; 0.417; 0.143 resp...

  12. Genomic differentiation and demographic histories of Atlantic and Indo-Pacific yellowfin tuna (Thunnus albacares) populations.

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    Barth, J M I; Damerau, M; Matschiner, M; Jentoft, S; Hanel, R

    2017-04-13

    Recent developments in the field of genomics have provided new and powerful insights into population structure and dynamics that are essential for the conservation of biological diversity. As a commercially highly valuable species, the yellowfin tuna (Thunnus albacares) is intensely exploited throughout its distribution in tropical oceans around the world, and is currently classified as near threatened. However, conservation efforts for this species have so far been hampered by limited knowledge of its population structure, due to incongruent results of previous investigations. Here, we use whole-genome sequencing in concert with a draft genome assembly to decipher the global population structure of the yellowfin tuna, and to investigate its demographic history. We detect significant differentiation of Atlantic and Indo-Pacific yellowfin tuna populations as well as the possibility of a third diverged yellowfin tuna group in the Arabian Sea. We further observe evidence for past population expansion as well as asymmetric gene flow from the Indo-Pacific to the Atlantic. © The Author(s) 2017. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  13. EMBRYO DEVELOPMENT OF YELLOWFIN TUNA (Thunnus albacares AT DIFFERENT INCUBATION TEMPERATURE

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    Jhon Harianto Hutapea

    2007-12-01

    Full Text Available The experiment was conducted in order to figure out the effect of incubation temperature on embryonic development of yellowfin tuna, Thunnus albacares eggs. Five different incubation temperatures were applied as treatments, i.e.: 24°C, 26°C, 28°C, 30°C, and 32°C with 3 replicate each. Ten micro plates with lid (IWAKI, Japan were used; each has 6 well and 10 mL volumes. Five micro plates were used for experiment and five for balance on shaker. Three well of each micro plate were filled with 8 mL ultra violet sterilized sea water and 50 fertilized eggs. Temperature was set using Multi Thermo Incubator which has 5 level racks. Temperatures were set from the lowest to the highest on bottom to upper rack order. To maintain eggs dispersed in the medium, shaker on each rack was operated at 150 RPM. The embryo was monitored every 30-60 minutes depends on embryonic stage development using Microscope which was connected to Digital Camera DXM 1200F. Image analyses by Image Analyzer Program. The results showed, incubation temperature was significantly affect (P<0.05 embryonic development and hatching time of yellowfin tuna (Thunnus albacares eggs. Optimum incubation temperature for embryo development and hatching was 28°C. Decreased on incubation temperature slows down embryo development at all stages, and vice versa, increased on incubation temperature accelerates embryo development.

  14. Otolith chemistry discriminates natal signatures of yellowfin tuna (Thunnus albacares) in the Atlantic Ocean

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    Kitchens, L. L.; Rooker, J. R.

    2016-02-01

    In this study, the otolith chemistry of young-of-the-year (YOY) yellowfin tuna (Thunnus albacares) was examined to determine whether chemical signatures are distinct across different putative spawning areas in the Atlantic Ocean. Yellowfin tuna is a highly migratory species that is currently managed as a single panmictic stock in the Atlantic Ocean; however, uncertainty remains regarding the population structure of yellowfin in this region, particularly concerning the degree of mixing between spawning populations. Analysis of naturally occurring chemical tracers in otoliths provides a valuable means to reconstruct a fish's environmental history and is thus a promising approach for delineating stock structure of Atlantic yellowfin tuna. YOY yellowfin tuna otoliths were collected from 5 locations in the Atlantic Ocean (Gulf of Mexico, SE Caribbean, Brazil, Cape Verde, and Gulf of Guinea) from 2013-2015 and trace element (Li, Mg, Mn, Co, Cu, Sr, Zn, and Ba) and stable isotope (δ13C and δ18O) analyses were conducted to investigate regional variation in otolith chemical composition. Results show significant differences among nursery areas in both trace element (MANOVA, p<0.001) and δ13C and δ18O signatures (ANOVA, p=0.017 and p=0.001, respectively). Particularly high spatial separation was observed based on eastern Atlantic (Gulf of Guinea + Cape Verde) and western Atlantic (Gulf of Mexico + Brazil + Martinique) nursery areas, indicating the approach has promise for distinguishing migrants displaying trans-ocean movement. These chemical signatures will be used to assign adult yellowfin tuna to their nursery of origin, ultimately providing an improved understanding of the stock structure and movement of yellowfin tuna in the Atlantic Ocean.

  15. Form and function of the bulbus arteriosus in yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus) and blue marlin (Makaira nigricans): static properties.

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    Braun, Marvin H; Brill, Richard W; Gosline, John M; Jones, David R

    2003-10-01

    The juxtaposition of heart and gills in teleost fish means that the Windkessel function characteristic of the whole mammalian arterial tree has to be subserved by the extremely short ventral aorta and bulbus arteriosus. Over the functional pressure range, arteries from blue marlin (Makaira nigricans) and yellowfin tuna (Thunnus albacares) have J-shaped pressure-volume (P-V) loops, while bulbi from the same species have r-shaped P-V loops, with a steep initial rise followed by a compliant plateau phase. The steep initial rise in pressure is due to the geometry of the lumen. The interactions between radius, pressure and tension require a large initial pressure to open the bulbar lumen for flow. The plateau is due to the unique organization of the bulbar wall. The large elastin:collagen ratio, limited amount of collagen arranged circumferentially, lack of elastin lamellae and low hydrophobicity of the elastin itself all combine to lower stiffness, increase extensibility and allow efficient recoil. Even though the modulus of bulbus material is much lower than that of an artery, at large volumes the overall stiffness of the bulbus increases rapidly. The morphological features that give rise to the special inflation characteristics of the bulbus help to extend flow and maintain pressure during diastole.

  16. Influences of oceanographic features on the distribution and abundance of yellowfin tuna, Thunnus albacares, larvae in the Gulf of Mexico

    Science.gov (United States)

    Cornic, M.; Rooker, J. R.

    2016-02-01

    Summer ichthyoplankton surveys were conducted in the northern Gulf of Mexico (NGoM) from 2007-2010 to characterize patterns of distribution and abundance of yellowfin tuna (Thunnus albacares) larvae in this region. Yellowfin tuna larvae were moderately abundant representing 9% of the overall Thunnus larvae collected (18765) and had a percent occurrence ranging from 13 to 57% among surveys. Interannual variations were detected with highest mean densities observed in 2009 (2.2 larvae per 1000m3) and the lowest mean densities observed in 2008 (0.7 larvae per 1000 m3). Generalized additive models were used to investigate the influence of oceanographic conditions on abundance of yellowfin tuna larvae. Increased densities were associated with high sea surface temperatures, positive sea surface heights, and intermediate salinities, revealing that these physicochemical conditions may be favorable for yellowfin tuna larvae. These results indicate that the NGoM is an important spawning and/or nursery habitat for yellowfin tuna and suggest that mesoscale features and physicochemical characteristics of water masses may impact distribution and abundance of yellowfin tuna larvae in the NGoM.

  17. Muscular system in the pacific bluefin tuna Thunnus orientalis (Teleostei: Scombridae).

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    Nakae, Masanori; Sasaki, Kunio; Shinohara, Gento; Okada, Tokihiko; Matsuura, Keiichi

    2014-02-01

    The muscular system in the Pacific bluefin tuna Thunnus orientalis is studied in detail. For the first time, a complete description of the muscular anatomy of a thunnid is provided here. Eighty-two elements including subdivisions of components of the muscular system are identified. This is less than found in a basal perciform and two other investigated scombrid species, owing mainly to the absence or fusion of pectoral, pelvic and caudal fin muscles. The absence of elements of the basal perciform pattern was most prominent in the caudal fin, which includes only the flexor dorsalis, flexor ventralis, hypochordal longitudinalis, and interradialis. In the caudal fin, the medial fan-shaped ray was identified as the first dorsal ray, judging from myological and neuroanatomical characters. The highly developed gill filament muscles in Thunnus orientalis and sheet-like rectus communis control gill ventilation. Long body muscle tendons reduce the metabolic energy needed during rapid and continuous swimming. These characters are interpreted as adaptations in the context of the oceanic life style of the species. Copyright © 2013 Wiley Periodicals, Inc.

  18. Transectional heat transfer in thermoregulating bigeye tuna (Thunnus obesus) - a 2D heat flux model.

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    Boye, Jess; Musyl, Michael; Brill, Richard; Malte, Hans

    2009-11-01

    We developed a 2D heat flux model to elucidate routes and rates of heat transfer within bigeye tuna Thunnus obesus Lowe 1839 in both steady-state and time-dependent settings. In modeling the former situation, we adjusted the efficiencies of heat conservation in the red and the white muscle so as to make the output of the model agree as closely as possible with observed cross-sectional isotherms. In modeling the latter situation, we applied the heat exchanger efficiencies from the steady-state model to predict the distribution of temperature and heat fluxes in bigeye tuna during their extensive daily vertical excursions. The simulations yielded a close match to the data recorded in free-swimming fish and strongly point to the importance of the heat-producing and heat-conserving properties of the white muscle. The best correspondence between model output and observed data was obtained when the countercurrent heat exchangers in the blood flow pathways to the red and white muscle retained 99% and 96% (respectively) of the heat produced in these tissues. Our model confirms that the ability of bigeye tuna to maintain elevated muscle temperatures during their extensive daily vertical movements depends on their ability to rapidly modulate heating and cooling rates. This study shows that the differential cooling and heating rates could be fully accounted for by a mechanism where blood flow to the swimming muscles is either exclusively through the heat exchangers or completely shunted around them, depending on the ambient temperature relative to the body temperature. Our results therefore strongly suggest that such a mechanism is involved in the extensive physiological thermoregulatory abilities of endothermic bigeye tuna.

  19. Discovering where bluefin tuna, Thunnus thynnus, might go: using environmental and fishery data to map potential tuna habitat in the eastern Mediterranean Sea

    OpenAIRE

    Dimitrios Damalas; Persefoni Megalofonou

    2012-01-01

    Based on a dataset derived from commercial fisheries in the eastern Mediterranean Sea in 1998-2005, we applied generalized additive models (GAMs) to investigate the relative influence of a range of environmental factors on catch rates of Atlantic bluefin tuna (Thunnus thynnus Linnaeus, 1785). GAM analyses were conducted by separately modelling (1) the probability of making a catch (encountering a school), and (2) the positive catch rates (school size). Results suggested intra-annual variation...

  20. Distinct Yellowfin Tuna (Thunnus albacares Stocks Detected in Western and Central Pacific Ocean (WCPO Using DNA Microsatellites.

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    Roselyn D Aguila

    Full Text Available The yellowfin tuna, Thunnus albacares (Bonnaterre, 1788, covers majority of the Philippines' tuna catch, one of the major fisheries commodities in the country. Due to its high economic importance sustainable management of these tunas has become an imperative measure to prevent stock depletion. Currently, the Philippine yellowfin tuna is believed to be part of a single stock of the greater WCPO though some reports suggest otherwise. This study therefore aims to establish the genetic stock structure of the said species in the Philippines as compared to Bismarck Sea, Papua New Guinea using nine (9 DNA microsatellite markers. DNA microsatellite data revealed significant genetic differentiation between the Philippine and Bismarck Sea, Papua New Guinea yellowfin tuna samples. (FST = 0.034, P = 0.016, which is further supported by multilocus distance matrix testing (PCoA and model-based clustering (STRUCTURE 2.2.With these findings, this study posits that the yellowfin tuna population in the Philippines is a separate stock from the Bismarck Sea population. These findings add evidence to the alternative hypothesis of having at least 2 subpopulations of yellowfin tuna in the WCPO and calls for additional scientific studies using other parameters to investigate this. Accurate population information is necessary in formulating a more appropriate management strategy for the sustainability of the yellowfin tuna not only in the Philippines but also in the WCPO.

  1. Evaluation of the proximate quality of the combination of Tuna (Thunnus albacares) and white oyster mushroom (Pleurotus ostreatus) nuggets

    Science.gov (United States)

    Yufidasari, H. S.; Prihanto, A. A.; Nurdiani, R.; Jaziri, A. A.

    2018-04-01

    Nugget is a processed meat product which has great market demand but need variations to increase its nutritional content. Tuna is rich in omega-3 protein, vitamins, and minerals. White oyster mushrooms have high nutritional content which are about 23-33% protein, 36-68 % carbohydrates and 12-22 % amino acids. The purpose of this research is to evaluate the chemical quality of Tuna nugget (Thunnus albacores) with combination of white oyster mushroom (Pleurotus ostreatus). Complete Randomized Design (RAL) with parameters of Tuna and white oyster mushroom formulation, TJ1 (70 % Tuna: 30 % white oyster mushroom), TJ2 (50 % Tuna: 50 % white oyster mushroom), TJ3 (30 % Tuna: 70 % white oyster mushroom), and Control or K Treatment (100 % Tuna) is used. Results of Tuna nuggets with white oyster mushroom combination showed the highest value of water content in TJ3 50.14 %, protein K 19.6 %, fat TJ3 22.98 %, ash K 3.99 % and 2.47 % crude fiber. From these results, there is a need for further research on fat, ash and coarse fiber content that is used in the manufacture of fish nuggets combined with oyster mushrooms because it failed to meet Indonesian National Standard (SNI).

  2. First data on growth and nucleic acid and protein content of field-captured Mediterranean bluefin (Thunnus thynnus and albacore (Thunnus alalunga tuna larvae: a comparative study

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    Alberto García

    2006-10-01

    Full Text Available The waters surrounding the Balearic archipelago are considered to be prime spawning habitats of the bluefin tuna (Thunnus thynnus and other tuna species such as albacore (T. alalunga in the Mediterranean. During the 2003 bluefin and albacore spawning season, a tuna larval survey (TUNIBAL 0703 was carried out to assess the distribution of bluefin larvae in relation to hydrographic mesoscale features. Tuna larvae were collected by means of surface plankton tows with a bongo gear with a quadrangular mouth measuring 1 m diagonally. The otolith microstructure of 157 and 71 field-captured larvae of Mediterranean bluefin and albacore, respectively, were analyzed to estimate the daily growth pattern. Furthermore, biochemical analysis to estimate DNA, RNA and protein content was done on another batch of 114 bluefin and 132 albacore larvae. The size range included pre-flexion to post-flexion larvae, from 2.8 to 8.6 mm in body length. bluefin and albacore larvae grew linearly in standard length (0.35 and 0.33 mm/day, respectively and potentially with respect to dry weight. No significant differences between species were observed in the size-weight relationship, or in the allometric relationship of body size and weight to otolith radius. However, the relationship of DNA and RNA to body size and weight showed a significant difference between species. Bluefin tuna larvae showed a greater nucleic acid content than albacore larvae. Protein content showed no significant differences with respect to body length.

  3. Extracting of yellowfin tuna (Thunnus albacares) fish skin gelatin as influenced by alkaline concentration and extraction times

    Science.gov (United States)

    Mafazah, E. M.; Pranoto, Y.; Rohman, A.

    2018-03-01

    Yellowfin tuna (Thunnus albacares) skin is a by-product of the fish processing industry. Yellowfin tuna skin was used as materials for gelatin because it contains collagen. This study was conducted to determine the characteristics of yellowfin tuna skin gelatin (YSG). In this study, YSG was obtained by the extraction process in 0.01 M NaOH solution for 12 h. The results show that the yield of YSG was 12.49 % dry basis, with the gel strength of 291.73 g Bloom, viscosity of 8.6 cPs and melting point of 35 °C. The gel strength and melting point of YSG were lower than commercial bovine gelatin (CBG), which was 309.7401 g Bloom and 36.33 °C, respectively. However, the viscosity of YSG was higher than the CBG which was 5.6 cPs.

  4. PENGARUH PERENDAMAN TULANG IKAN TUNA (Thunnus albacares DALAM LARUTAN NaOH TERHADAP KUALITAS GELATIN HASIL OLAHANNYA

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    Tazwir Tazwir

    2009-06-01

    Full Text Available Gelatin tulang ikan tuna (Thunnus albaceres dengan kualitas baik seringkali sulit diperoleh, karena kebanyakan produk ini mengandung lemak dan protein non kolagen yang cukup tinggi. Dalam memproduksi gelatin tulang tuna, lemak, dan protein non kolagen tersebut harus direduksi hingga batas minimum. Dalam penelitian ini dipelajari pengaruh perendaman tulang ikan tuna dalam larutan NaOH sebelum ekstraksi terhadap kualitas gelatin yang dihasilkan. Tahapan yang dilakukan adalah degreasing, pencucian, perendaman dalam NaOH dengan variasi konsentrasi 0; 0,4; dan 0,8%, kemudian perendaman dalam HCl, ekstraksi, filtrasi, evaporasi, dan pengeringan. Hasil penelitian menunjukkan bahwa karakteristik gelatin yang terbaik diperoleh dari perendaman tulang dalam NaOH 0,4%, yaitu dengan nilai rendemen 8,37%; viskositas 3,27-3,37 cPs; pH 5,03; dan kekuatan gel 157,8 g Bloom gel strength.

  5. Karakteristik Ikan Tuna sirip biru selatan (Thunnus maccoyii Hasil Tangkapan Kapal Rawai Tuna yang didaratkan di Pelabuhan Benoa

    Directory of Open Access Journals (Sweden)

    I Gede Adi Swastana

    2016-07-01

    Full Text Available Southern bluefin tuna (SBT is scientifically known Thunnus maccoyii, and just live in the southern hemisphere. SBT fish classified as the most exploited tuna fish in the southeastern part of the Indian Ocean, so it is protected by the International Union for the Conservation of Nature (IUCN. The aim of this study is too collected of SBT fish caught during January which is the peak of SBT landing in Benoa port. The study was conducted base on data sampling, observation and interviews on 33 ships were landing SBT fish during January 2016. Based on observations from 33 vessels, we found that the total of SBT fish that landed in Benoa port during January 2016 is 251 fresh fish and 366 frozen fish. However just 251 SBT fresh fish were sampled, and the result indicated the fresh SBT fish is dominated by weigh between 61-70 kg with number 61 fish with a total weight of 19.28 tonne. The SBT were caught dominated by fish that has FL (fork lenght ranging between 151-160 cm with number 69 fish. While the smallest SBT range between 131-140 cm with the number of 5 fish. These results indicate that SBT fish caught in the Souetheast Indian Ocean during January 2016 is generaly relative small fish (130–160 cm FL with a number of 163 fish and mature SBT fish (FL > 162 cm with a number of 88 and young SBT (FL < 130 cm with a number of 5 fish. Based on morphometric analysis, eyeball diameter of SBT range 6-8 cm, the length lateral head from the tip of the mouth to behind the gill cover ranging 46-54 cm, the length of body from the early dorsal or in front of the first dorsal fin ranging between 38-47 cm, the height of fish at the end of the anal or at the end ranging between 34-39 cm, the high of caudal peduncle ranging between 4-5 cm, th length of the dorsal base of the tail fish ranging between 53-63 cm, and the length of the base of tail anal from anal to tail ranging between 41-51 cm. Base on size and age composition, it is shown that the growth of SBT

  6. Karakteristik Ikan Tuna sirip biru selatan (Thunnus maccoyii Hasil Tangkapan Kapal Rawai Tuna yang didaratkan di Pelabuhan Benoa

    Directory of Open Access Journals (Sweden)

    I Gede Adi Swastana

    2016-12-01

    Full Text Available Southern bluefin tuna (SBT is scientifically known Thunnus maccoyii, and just live in the southern hemisphere. SBT fish classified as the most exploited tuna fish in the southeastern part of the Indian Ocean, so it is protected by the International Union for the Conservation of Nature (IUCN. The aim of this study is too collected of SBT fish caught during January which is the peak of SBT landing in Benoa port. The study was conducted base on data sampling, observation and interviews on 33 ships were landing SBT fish during January 2016. Based on observations from 33 vessels, we found that the total of SBT fish that landed in Benoa port during January 2016 is 251 fresh fish and 366 frozen fish. However just 251 SBT fresh fish were sampled, and the result indicated the fresh SBT fish is dominated by weigh between 61-70 kg with number 61 fish with a total weight of 19.28 tonne. The SBT were caught dominated by fish that has FL (fork lenght ranging between 151-160 cm with number 69 fish. While the smallest SBT range between 131-140 cm with the number of 5 fish. These results indicate that SBT fish caught in the Souetheast Indian Ocean during January 2016 is generaly relative small fish (130–160 cm FL with a number of 163 fish and mature SBT fish (FL > 162 cm with a number of 88 and young SBT (FL < 130 cm with a number of 5 fish. Based on morphometric analysis, eyeball diameter of SBT range 6-8 cm, the length lateral head from the tip of the mouth to behind the gill cover ranging 46-54 cm, the length of body from the early dorsal or in front of the first dorsal fin ranging between 38-47 cm, the height of fish at the end of the anal or at the end ranging between 34-39 cm, the high of caudal peduncle ranging between 4-5 cm, th length of the dorsal base of the tail fish ranging between 53-63 cm, and the length of the base of tail anal from anal to tail ranging between 41-51 cm. Base on size and age composition, it is shown that the growth of SBT

  7. Amino Acid Isotope Incorporation and Enrichment Factors in Pacific Bluefin Tuna, Thunnus orientalis

    Science.gov (United States)

    Bradley, Christina J.; Madigan, Daniel J.; Block, Barbara A.; Popp, Brian N.

    2014-01-01

    Compound specific isotopic analysis (CSIA) of amino acids has received increasing attention in ecological studies in recent years due to its ability to evaluate trophic positions and elucidate baseline nutrient sources. However, the incorporation rates of individual amino acids into protein and specific trophic discrimination factors (TDFs) are largely unknown, limiting the application of CSIA to trophic studies. We determined nitrogen turnover rates of individual amino acids from a long-term (up to 1054 days) laboratory experiment using captive Pacific bluefin tuna, Thunnus orientalis (PBFT), a large endothermic pelagic fish fed a controlled diet. Small PBFT (white muscle δ15N∼11.5‰) were collected in San Diego, CA and transported to the Tuna Research and Conservation Center (TRCC) where they were fed a controlled diet with high δ15N values relative to PBFT white muscle (diet δ15N∼13.9‰). Half-lives of trophic and source amino acids ranged from 28.6 to 305.4 days and 67.5 to 136.2 days, respectively. The TDF for the weighted mean values of amino acids was 3.0 ‰, ranging from 2.2 to 15.8 ‰ for individual combinations of 6 trophic and 5 source amino acids. Changes in the δ15N values of amino acids across trophic levels are the underlying drivers of the trophic 15N enrichment. Nearly all amino acid δ15N values in this experiment changed exponentially and could be described by a single compartment model. Significant differences in the rate of 15N incorporation were found for source and trophic amino acids both within and between these groups. Varying half-lives of individual amino acids can be applied to migratory organisms as isotopic clocks, determining the length of time an individual has spent in a new environment. These results greatly enhance the ability to interpret compound specific isotope analyses in trophic studies. PMID:24465724

  8. Evaluation of three harvest control rules for Bigeye Tuna ( Thunnus obesus) fisheries in the Indian Ocean

    Science.gov (United States)

    Tong, Yuhe; Chen, Xinjun; Kolody, Dale

    2014-10-01

    The stock of Bigeye tuna ( Thunnus obesus) in the Indian Ocean supports an important international fishery and is considered to be fully exploited. The responsible management agency, the Indian Ocean Tuna Commission (IOTC), does not have an explicit management decision-making framework in place to prevent over-fishing. In this study, we evaluated three harvest control rules, i) constant fishing mortality (CF), from 0.2 to 0.6, ii) constant catch (CC), from 60000 to 140000 t, and iii) constant escapement (CE), from 0.3 to 0.7. The population dynamics simulated by the operating model was based on the most recent stock assessment using Stock Synthesis version III (SS3). Three simulation scenarios (low, medium and high productivity) were designed to cover possible uncertainty in the stock assessment and biological parameters. Performances of three harvest control rules were compared on the basis of three management objectives (over 3, 10 and 25 years): i) the probability of maintaining spawning stock biomass above a level that can sustain maximum sustainable yield (MSY) on average, ii) the probability of achieving average catches between 0.8 MSY and 1.0 MSY, and iii) inter-annual variability in catches. The constant escapement strategy ( CE=0.5), constant fishing mortality strategy ( F=0.4) and constant catch ( CC=80000) were the most rational among the respective management scenarios. It is concluded that the short-term annual catch is suggested at 80000 t, and the potential total allowable catch for a stable yield could be set at 120000 t once the stock had recovered successfully. All the strategies considered in this study to achieve a `tolerable' balance between resource conservation and utilization have been based around the management objectives of the IOTC.

  9. Evaluating alternative management strategies for bigeye tuna, Thunnus obesus, in the Indian Ocean

    Directory of Open Access Journals (Sweden)

    Yuhe Tong

    2013-09-01

    Full Text Available Bigeye tuna (Thunnus obesus support a large commercial fishery in the Indian Ocean. However, explicit management strategies and harvest control rules are yet to be developed for the management of this fishery. We used a stochastic age-structured production model as an operating model to evaluate several potential management strategies under different assumptions of stock productivity. Five management strategies—constant fishing mortality, constant catch, quasi-constant catch, constant escapement, and status-dependent strategies—were evaluated and compared using the performance indicators including average catch, average spawning stock biomass, variation in catch, average fishing mortality and lowest biomass during the time period considered in the simulation. This study shows that (1 for the constant catch strategy, an annual catch of 90000 t would result in a low risk of stock being overfished while obtaining a stable catch; (2 for the constant fishing mortality strategy fishing mortality of 0.3 per year could yield a higher catch, but might have a high probability (64% of stock dropping below the spawning stock biomass (SSB that could achieve maximum sustainable yield (SSBmsy; and (3 for the quasi-constant catch strategy an annual catch of 110000 t was sustainable if the current SSB was higher than SSBmsy. Constant escapement and status-dependent strategies were robust with respect to different levels of virgin recruitment and steepness. This study suggests that it is important to incorporate uncertainties associated with key life history, fisheries and management processes in evaluating management strategies.

  10. Blood Volume, Plasma Volume and Circulation Time in a High-Energy-Demand Teleost, the Yellowfin Tuna (Thunnus Albacares)

    DEFF Research Database (Denmark)

    Brill, R.W.; Cousins, K.L.; Jones, D.R.

    1998-01-01

    We measured red cell space with 51Cr-labeled red blood cells, and dextran space with 500 kDa fluorescein-isothiocyanate-labeled dextran (FITC-dextran), in two groups of yellowfin tuna (Thunnus albacares). Red cell space was 13.8+/-0.7 ml kg-1 (mean +/- s.e.m.) Assuming a whole- body hematocrit...... for albacore (Thunnus alalunga, 82-197 ml kg-1). Plasma volume within the primary circulatory system (calculated from the 51Cr-labeled red blood cell data) was 32.9+/-2.3 ml kg-1. Dextran space was 37.0+/-3.7 ml kg-1. Because 500 kDa FITC-dextran appeared to remain within the vascular space, these data imply...

  11. Preliminary approach on early post mortem stress and quality indexes changes in large size bluefin tuna (Thunnus thynnus

    Directory of Open Access Journals (Sweden)

    R. Ugolini

    2010-01-01

    Full Text Available Bluefin tuna (Thunnus thynnus is very appreciated on Japan and USA market for the preparation of sushi and sahimi. The market price of the fresh product can vary from 8 to 33 Euro/kg (gate farm/producers prices according to size, shape, fat level, meat colour, consistency and freshness (absence of “hyake”, all parameters strictly connected to feeding quality and quantity, rearing and killing stress factors and refrigeration times and conditions after death. Excessive levels of stress during the slaughtering can affect meat quality, contributing to significantly decrease of tuna’s price. The present trial was carried out to evaluate the possible harvesting/slaughtering stress effect on reared bluefin tuna meat quality, starting from the examination of the most important stress and quality parameters changes during the early post mortem period.

  12. The development of the northern European fishery for north Atlantic bluefin tuna Thunnus thynnus during 1900-1950

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Myers, R.A.

    2007-01-01

    North Atlantic bluefin tuna, Thunnus thynnus, used to migrate to northern European waters (Norwegian Sea, North Sea, Skagerrak, Kattegat, and Øresund) where it supported important commercial and sportfisheries. The species disappeared from the region in the early 1960s and the species is now still...... increasing. The species was frequently sighted while fishermen were targeting other species (herring, mackerel) and occasionally was caught as bycatch with these and other species. Information from scientifically trained observers demonstrate that tuna schools were common in the North Sea for 2–3 months...... during the summers of 1923–1931. As fishermen realized that the species had market value, new catch methods were developed and employed. These included harpoon-rifle, improved hook and line methods, and hydraulically operated purse seines. Landings rose sharply as did the number of vessels...

  13. Quantifying mercury isotope dynamics in captive Pacific bluefin tuna (Thunnus orientalis

    Directory of Open Access Journals (Sweden)

    Sae Yun Kwon

    2016-02-01

    Full Text Available Abstract Analyses of mercury (Hg isotope ratios in fish tissues are used increasingly to infer sources and biogeochemical processes of Hg in natural aquatic ecosystems. Controlled experiments that can couple internal Hg isotope behavior with traditional isotope tracers (δ13C, δ15N can improve the applicability of Hg isotopes as natural ecological tracers. In this study, we investigated changes in Hg isotope ratios (δ202Hg, Δ199Hg during bioaccumulation of natural diets in the pelagic Pacific bluefin tuna (Thunnus orientalis; PBFT. Juvenile PBFT were fed a mixture of natural prey and a dietary supplement (60% Loligo opalescens, 31% Sardinops sagax, 9% gel supplement in captivity for 2914 days, and white muscle tissues were analyzed for Hg isotope ratios and compared to time in captivity and internal turnover of δ13C and δ15N. PBFT muscle tissues equilibrated to Hg isotope ratios of the dietary mixture within ∼700 days, after which we observed a cessation in further shifts in Δ199Hg, and small but significant negative δ202Hg shifts from the dietary mixture. The internal behavior of Δ199Hg is consistent with previous fish studies, which showed an absence of Δ199Hg fractionation during Hg bioaccumulation. The negative δ202Hg shifts can be attributed to either preferential excretion of Hg with higher δ202Hg values or individual variability in captive PBFT feeding preferences and/or consumption rates. The overall internal behavior of Hg isotopes is similar to that described for δ13C and δ15N, though observed Hg turnover was slower compared to carbon and nitrogen. This improved understanding of internal dynamics of Hg isotopes in relation to δ13C and δ15N enhances the applicability of Hg isotope ratios in fish tissues for tracing Hg sources in natural ecosystems.

  14. Spawning Dynamics and Size Related Trends in Reproductive Parameters of Southern Bluefin Tuna, Thunnus maccoyii.

    Directory of Open Access Journals (Sweden)

    Jessica H Farley

    Full Text Available Knowledge of spawning behaviour and fecundity of fish is important for estimating the reproductive potential of a stock and for constructing appropriate statistical models for assessing sustainable catch levels. Estimates of length-based reproductive parameters are particularly important for determining potential annual fecundity as a function of fish size, but they are often difficult to estimate reliably. Here we provide new information on the reproductive dynamics of southern bluefin tuna (SBT Thunnus maccoyii through the analysis of fish size and ovary histology collected on the spawning ground in 1993-1995 and 1999-2002. These are used to refine previous parameter estimates of spawning dynamics and investigate size related trends in these parameters. Our results suggest that the small SBT tend to arrive on the spawning ground slightly later and depart earlier in the spawning season relative to large fish. All females were mature and the majority were classed as spawning capable (actively spawning or non-spawning with a very small proportion classed as regressing. The fraction of females spawning per day decreased with fish size, but once females start a spawning episode, they spawned daily irrespective of size. Mean batch fecundity was estimated directly at 6.5 million oocytes. Analysis of ovary histology and ovary weight data indicated that relative batch fecundity, and the duration of spawning and non-spawning episodes, increased with fish size. These reproductive parameter estimates could be used with estimates of residency time on the spawning ground as a function of fish size (if known and demographic data for the spawning population to provide a time series of relative annual fecundity for SBT.

  15. Molecular and morphological identification of Cardicola (Trematoda: Aporocotylidae) eggs in hatchery-reared and migratory Atlantic bluefin tuna (Thunnus thynnus L.)

    Czech Academy of Sciences Publication Activity Database

    Forte-Gil, D.; Holzer, Astrid S.; Pecková, Hana; Bartošová-Sojková, Pavla; Peñalver, J.; Dolores, E.M.; Muñoz, P.

    2016-01-01

    Roč. 450, JAN 1 (2016), s. 58-66 ISSN 0044-8486 R&D Projects: GA ČR GBP505/12/G112 Institutional support: RVO:60077344 Keywords : Aquaculture * Atlantic bluefin tuna * Blood fluke * Cardicola * Migration * Thunnus thynnus Subject RIV: EG - Zoology Impact factor: 2.570, year: 2016

  16. Physicochemical evaluation of the effects of irradiation and evisceration on the conservation of refrigerated blackfin tuna (Thunnus atlanticus)

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Maria L.G.; Marsico, Eliane T. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Veterinaria. Dept. de Tecnologia de Alimentos], e-mail: marialuciaguerra@yahoo.com.br, e-mail: elianee@vm.uff.br; Vital, Helio C. [Centro Tecnologico do Exercito (CTEx), Rio de Janeiro, RJ (Brazil). Secao de Defesa Nuclear], e-mail: vital@ctex.eb.br

    2009-07-01

    Tuna is among the most traded fishes in Brazil, however efficiently delaying its fast deterioration is still a major practical challenge. Irradiation has been proposed as a safe and powerful alternative tool for conservation of seafood. This work investigated the effects of irradiation on the physicochemical quality of refrigerated blackfin tuna (Thunnus atlanticus). Analyses of pH, total volatile bases (TVB-N), ammonia and biogenic amines (histamine, cadaverine and putrescine) were performed in order to determine the degree of conservation. The samples were subjected to four different treatments aiming at evaluating the efficiency of irradiation, evisceration and both combined. The figures measured for those parameters, all of them related to the degree of conservation, were found to increase with time regardless of the treatment. In addition, data for irradiated samples remained consistently lower than for unirradiated ones, indicating a better level of preservation that led to an extended shelf life of 14 days. In contrast, excessive levels of those indicators of degradation were found in unirradiated samples after 7 to 10 days of storage. In addition, some evidence was found that evisceration slightly increased quality, consequently promoting a small extension in shelf life of unirradiated samples. Finally, it can be concluded with basis on the results of the physicochemical parameters studied that treatment of fresh refrigerated blackfin tuna by irradiation with 2.5 kGy efficiently preserved freshness and extended the shelf life of the product from 7 to 14 days. (author)

  17. Physicochemical evaluation of the effects of irradiation and evisceration on the conservation of refrigerated blackfin tuna (Thunnus atlanticus)

    International Nuclear Information System (INIS)

    Monteiro, Maria L.G.; Marsico, Eliane T.; Vital, Helio C.

    2009-01-01

    Tuna is among the most traded fishes in Brazil, however efficiently delaying its fast deterioration is still a major practical challenge. Irradiation has been proposed as a safe and powerful alternative tool for conservation of seafood. This work investigated the effects of irradiation on the physicochemical quality of refrigerated blackfin tuna (Thunnus atlanticus). Analyses of pH, total volatile bases (TVB-N), ammonia and biogenic amines (histamine, cadaverine and putrescine) were performed in order to determine the degree of conservation. The samples were subjected to four different treatments aiming at evaluating the efficiency of irradiation, evisceration and both combined. The figures measured for those parameters, all of them related to the degree of conservation, were found to increase with time regardless of the treatment. In addition, data for irradiated samples remained consistently lower than for unirradiated ones, indicating a better level of preservation that led to an extended shelf life of 14 days. In contrast, excessive levels of those indicators of degradation were found in unirradiated samples after 7 to 10 days of storage. In addition, some evidence was found that evisceration slightly increased quality, consequently promoting a small extension in shelf life of unirradiated samples. Finally, it can be concluded with basis on the results of the physicochemical parameters studied that treatment of fresh refrigerated blackfin tuna by irradiation with 2.5 kGy efficiently preserved freshness and extended the shelf life of the product from 7 to 14 days. (author)

  18. Heavy metals in yellowfin tuna (Thunnus albacares) and common dolphinfish (Coryphaena hippurus) landed on the Ecuadorian coast

    Energy Technology Data Exchange (ETDEWEB)

    Araújo, Cristiano V.M., E-mail: cristiano.araujo@icman.csic.es [Central Department of Research (DCI), Ecuadorian Aquatic Ecotoxicology (ECUACTOX) group, Universidad Laica Eloy Alfaro de Manabí - ULEAM, Manta (Ecuador); Centre of Functional Ecology (CFE), Department of Life Sciences, University of Coimbra, Coimbra (Portugal); Cedeño-Macias, Luis A. [Central Department of Research (DCI), Ecuadorian Aquatic Ecotoxicology (ECUACTOX) group, Universidad Laica Eloy Alfaro de Manabí - ULEAM, Manta (Ecuador); Faculty of Marine Sciences, Universidad Laica Eloy Alfaro de Manabí (ULEAM), Manta (Ecuador)

    2016-01-15

    Heavy metals are contaminants of great environmental concern due to their multiple origins (natural and anthropogenic), the ability to accumulate in organs and tissues, and the deleterious effects they can cause in organisms. Studies on the accumulation of metals in seafood, such as fish, have increased in importance due to the risk for human health when consuming fish contaminated by metals. The present work was aimed at verifying the concentrations of cadmium (Cd), mercury (Hg) and lead (Pb) in the muscular tissue and liver of yellowfin tuna (Thunnus albacares) and common dolphinfish (Coryphaena hippurus) from the Eastern Pacific Ocean landed in Manta city, Ecuador. Samples were analyzed by inductively coupled plasma mass spectroscopy (ICP-MS). Around half of the muscle samples of both species presented levels of Cd and Hg above the limits considered safe for human consumption established by the European Union. For Pb, most of the muscle samples were considered acceptable for consumption. Results indicate that both species should be consumed with some caution. Considering the tolerable weekly intake recommended for adults by the World Health Organization, results indicate that Hg is the main metal that limits the consumption of yellowfin tuna and common dolphinfish, with a recommended maximum ingestion, respectively, of 191 and 178 g per week for an adult. - Highlights: • Thunnus albacares and Coryphaena hippurus from Eastern Pacific (Ecuador) were sampled. • Muscle and liver of both species were assessed for Cd, Hg and Pb concentrations. • Levels of Pb were considered acceptable for both species. • High levels of Cd and Hg in both species can be considered unsafe for human health. • For both species the recommended maximum ingestion is around 180 g week{sup −1} for an adult.

  19. Mercury accumulation in Yellowfin tuna (Thunnus albacares) with regards to muscle type, muscle position and fish size.

    Science.gov (United States)

    Bosch, Adina C; O'Neill, Bernadette; Sigge, Gunnar O; Kerwath, Sven E; Hoffman, Louwrens C

    2016-01-01

    The concentrations and relationships between individual mercury species and total mercury were investigated in different muscle parts and sizes of Yellowfin tuna (Thunnus albacares). Fourteen Yellowfin tuna caught in the South Atlantic off the coast of South Africa had an average total Hg (tHg) concentration of 0.77 mg/kg wet weight. No differences were detected (p > 0.05) in tHg, MethylHg (MeHg) or inorganic Hg (iHg) accumulation among the four white muscle portions across the carcass, but both tHg and iHg were found in higher concentrations (p < 0.001) in dark muscle than white muscle. Positive linear correlations with fish weight were found for both tHg (r = 0.79, p < 0.001) and MeHg (r = 0.75, p < 0.001) concentrations. A prediction model was formulated to calculate toxic MeHg concentrations from measured tHg concentrations and fish weight (cMeHg = 0.073 + 1.365 · tHg-0.008 · w). As sampling sites and subsampling methods could affect toxicity measurements, we provide recommendations for sampling guidelines. Copyright © 2015 Elsevier Ltd. All rights reserved.

  20. Levels of dioxin (PCDD/F) and PCBs in a random sample of Australian aquaculture-produced Southern Bluefin Tuna (Thunnus maccoyii)

    Energy Technology Data Exchange (ETDEWEB)

    Padula, D.; Madigan, T.; Kiermeier, A.; Daughtry, B.; Pointon, A. [South Australian Research and Development Inst. (Australia)

    2004-09-15

    To date there has been no published information available on the levels of dioxin (PCDD/F) and PCBs in Australian aquaculture-produced Southern Bluefin Tuna (Thunnus maccoyii). Southern Bluefin Tuna are commercially farmed off the coast of Port Lincoln in the state of South Australia, Australia. This paper reports the levels of dioxin (PCDD/F) and PCBs in muscle tissue samples from 11 randomly sampled aquaculture-produced Southern Bluefin Tuna collected in 2003. Little published data exists on the levels of dioxin (PCDD/F) and PCBs in Australian aquacultureproduced seafood. Wild tuna are first caught in the Great Australian Bight in South Australian waters, and are then brought back to Port Lincoln where they are ranched in sea-cages before being harvested and exported to Japan. The aim of the study was to identify pathways whereby contaminants such as dioxin (PCDD/F) and PCBs may enter the aquaculture production system. This involved undertaking a through chain analysis of the levels of dioxin (PCDD/F) and PCBs in wild caught tuna, seafloor sediment samples from the marine environment, levels in feeds and final harvested exported product. Detailed study was also undertaken on the variation of dioxin (PCDD/F) and PCBs across individual tuna carcases. This paper addresses the levels found in final harvested product. Details on levels found in other studies will be published elsewhere shortly.

  1. Brain morphology and immunohistochemical localization of the gonadotropin-releasing hormone in the bluefin tuna, Thunnus thynnus

    Directory of Open Access Journals (Sweden)

    G Palmieri

    2009-08-01

    Full Text Available The present study was focused on the morphology of the diencephalic nuclei (likely involved in reproductive functions as well as on the distribution of GnRH (gonadotropin-releasing hormone in the rhinencephalon, telencephalon and the diencephalon of the brain of bluefin tuna (Thunnus thynnus by means of immunohistochemistry. Bluefin tuna has an encephalization quotient (QE similar to that of other large pelagic fish. Its brain exhibits well-developed optic tecta and corpus cerebelli. The diencephalic neuron cell bodies involved in reproductive functions are grouped in two main nuclei: the nucleus preopticus-periventricularis and the nucleus lateralis tuberis. The nucleus preopticus-periventricularis consists of the nucleus periventricularis and the nucleus preopticus consisting of a few sparse multipolar neurons in the rostral part and numerous cells closely packed and arranged in several layers in its aboral part. The nucleus lateralis tuberis is located in the ventral-lateral area of the diencephalon and is made up of a number of large multipolar neurones. Four different polyclonal primary antibodies against salmon (sGnRH, chicken (cGnRH-II (cGnRH-II 675, cGnRH-II 6 and sea bream (sbGnRH were employed in the immunohistochemical experiments. No immunoreactive structures were found with anti sbGnRH serum. sGnRH and cGnRH-II antisera revealed immunoreactivity in the perikarya of the olfactory bulbs, preopticus-periventricular nucleus, oculomotor nucleus and midbrain tegmentum. The nucleus lateralis tuberis showed immunostaining only with anti-sGnRH serum. Nerve fibres immunoreactive to cGnRH and sGnRH sera were found in the olfactory bulbs, olfactory nerve and neurohypophysis. The significance of the distribution of the GnRHimmunoreactive neuronal structures is discussed.

  2. Gamma Irradiation Effects On Thiamin And Riboflavin On Fresh Tuna (Thunnus thynnus) And Salmon (Onchorhynchus gorbuscha)

    International Nuclear Information System (INIS)

    Tanhindarto, Rindy P.; Fox, J.B.; Lakritz, L.; Thayer, D.W.

    2002-01-01

    An experiment have been conducted on the effect of gamma irradiation on thiamine and riboflavin in fresh tuna and salmon. Samples were irradiated at (20 ± 0,5) oC by gamma rays with doses of 0; 2,5 and 5 kGy. The purpose of the present experiment was to study on changes of thiamine and riboflavin contents on extraction of fresh tuna and salmon after and before irradiation. The results showed that irradiation up to 2,5 kGy changed the thiamine and riboflavin contents on fresh tuna as well as their destruction which was significantly increasing caused by irradiated treatment with the dose of 5 kGy. The fresh salmon did not significantly change of the thiamine and riboflavin contents treated by irradiation up to 5 kGy

  3. Isotopic discrimination factors and nitrogen turnover rates in reared Atlantic bluefin tuna larvae (Thunnus thynnus: effects of maternal transmission

    Directory of Open Access Journals (Sweden)

    Amaya Uriarte

    2016-11-01

    Full Text Available The use of stable isotope analysis to study animal diets requires estimates of isotopic turnover rates (half time, t50 and discrimination factors (Δ for an accurate interpretation of trophic patterns. The stable isotopes of carbon and nitrogen were analysed for eggs and reared larvae of Thunnus thynnus, as well as for the different diets supplied during the experiment. The results showed high values of δ15N in eggs and larvae (n=646 until 4 DAH. After this time lapse, the stable isotope values declined progressively until 12 DAH, when notochord flexion began. The δ13C showed an inverse trend, suggesting that maternal inheritance of the stable isotopes is evident until pre-flexion stages. This study proposes a model for estimating maternal isotopic signatures of bluefin broodstock. After notochord flexion, larvae were fed with aquaculture-bred gilthead seabream, which resulted in a rapid increase of bluefin larvae δ15N values together with a rapid decrease in δ13C values. The estimated nitrogen half-time to reach the steady state from the diet was 2.5±0.3 days and the discrimination factor was 0.4±0.3(‰. These results represent the first data set that has allowed isotopic nitrogen turnover rates and discrimination factors of the larval stages of bluefin tuna to be estimated.

  4. Mercury levels of yellowfin tuna (Thunnus albacares) are associated with capture location.

    Science.gov (United States)

    Nicklisch, Sascha C T; Bonito, Lindsay T; Sandin, Stuart; Hamdoun, Amro

    2017-10-01

    Mercury is a toxic compound to which humans are exposed by consumption of fish. Current fish consumption advisories focus on minimizing the risk posed by the species that are most likely to have high levels of mercury. Less accounted for is the variation within species, and the potential role of the geographic origin of a fish in determining its mercury level. Here we surveyed the mercury levels in 117 yellowfin tuna caught from 12 different locations worldwide. Our results indicated significant variation in yellowfin tuna methylmercury load, with levels that ranged from 0.03 to 0.82 μg/g wet weight across individual fish. Mean mercury levels were only weakly associated with fish size (R 2  mercury load, and argue for better traceability of fish to improve the accuracy of exposure risk predictions. Copyright © 2017 Elsevier Ltd. All rights reserved.

  5. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839)

    OpenAIRE

    Gonzalez, Elena G; Beerli, Peter; Zardoya, Rafael

    2008-01-01

    Abstract Background Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour) and physical (e.g. present-day ocean currents, past changes in sea temperature and levels) factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitoc...

  6. Revisiting the vulnerability of juvenile bigeye (Thunnus obesus) and yellowfin (T. albacares) tuna caught by purse-seine fisheries while associating with surface waters and floating objects.

    Science.gov (United States)

    Scutt Phillips, Joe; Pilling, Graham M; Leroy, Bruno; Evans, Karen; Usu, Thomas; Lam, Chi Hin; Schaefer, Kurt M; Nicol, Simon

    2017-01-01

    Tuna fisheries catch over three million tonnes of skipjack tuna (Katsuwonus pelamis) each year, the majority of which come from purse-seine vessels targeting fish associated with man-made fish aggregating devices (FADs). A significant challenge for fisheries management is to maximize the efficiency of skipjack tuna catches whilst minimizing the bycatch of small and immature bigeye (Thunnus obesus) and yellowfin (T. albacares) tuna, for which long-term sustainability is uncertain in 75% of the world's stocks. To better manage the issues common with this fishing method, an improved understanding of tuna behaviour around FADs is necessary. We probabilistically classified the vertical behavioural patterns of 50 bigeye and 35 yellowfin tuna (mean fork length 72cm and 70cm, respectively) electronically tagged throughout the western and central Pacific Ocean into shallow and deep states, using a state-space modelling approach. The occurrence of surface-association behaviours, defined as an individual remaining in a shallow state for 24-hours, was examined in relation to known capture events and FAD density. In general, surface-association events for both species were short and lasted on average less than three days, although events as long as 28 days were observed, and were more common in yellowfin when in archipelagic waters. Events were longest immediately following tagging in 62% and 17% of bigeye and yellowfin, respectively. Surface-association behaviour was not generally estimated just prior to recapture, being either non-existent or shorter than two days for 85% of bigeye and 74% of yellowfin. Current management measures in purse-seine tuna fisheries involve periodic or spatial closures for FAD use. If the chief benefit to purse-seine fishers of surface-association around floating objects is in locating schools in horizontal space at short-term time-scales, rather than holding fish near the surface for extended periods, controlling the number of sets made on FADs

  7. Revisiting the vulnerability of juvenile bigeye (Thunnus obesus and yellowfin (T. albacares tuna caught by purse-seine fisheries while associating with surface waters and floating objects.

    Directory of Open Access Journals (Sweden)

    Joe Scutt Phillips

    Full Text Available Tuna fisheries catch over three million tonnes of skipjack tuna (Katsuwonus pelamis each year, the majority of which come from purse-seine vessels targeting fish associated with man-made fish aggregating devices (FADs. A significant challenge for fisheries management is to maximize the efficiency of skipjack tuna catches whilst minimizing the bycatch of small and immature bigeye (Thunnus obesus and yellowfin (T. albacares tuna, for which long-term sustainability is uncertain in 75% of the world's stocks. To better manage the issues common with this fishing method, an improved understanding of tuna behaviour around FADs is necessary. We probabilistically classified the vertical behavioural patterns of 50 bigeye and 35 yellowfin tuna (mean fork length 72cm and 70cm, respectively electronically tagged throughout the western and central Pacific Ocean into shallow and deep states, using a state-space modelling approach. The occurrence of surface-association behaviours, defined as an individual remaining in a shallow state for 24-hours, was examined in relation to known capture events and FAD density. In general, surface-association events for both species were short and lasted on average less than three days, although events as long as 28 days were observed, and were more common in yellowfin when in archipelagic waters. Events were longest immediately following tagging in 62% and 17% of bigeye and yellowfin, respectively. Surface-association behaviour was not generally estimated just prior to recapture, being either non-existent or shorter than two days for 85% of bigeye and 74% of yellowfin. Current management measures in purse-seine tuna fisheries involve periodic or spatial closures for FAD use. If the chief benefit to purse-seine fishers of surface-association around floating objects is in locating schools in horizontal space at short-term time-scales, rather than holding fish near the surface for extended periods, controlling the number of sets

  8. Morphological, nutritional and safety traits of bluefin tuna (Thunnus thynnus reared in floating cages

    Directory of Open Access Journals (Sweden)

    B. M. Poli

    2010-04-01

    Full Text Available To evaluate the influence of fattening on morphological, nutritional and safety characteristics, two lots of bluefin tuna were sampled before (November: 2 C, 4 ? and after 5 months of fattening (April: 5 C, 5 ?. The specimens, after death, were refrigerated and analysed at different times over the period of a week for morphological and flesh physico-chemical parameters in six muscle sites. Tuna sampled in April had greater body weight (44.04 vs 36.41kg, trunk length (52.21 vs 48.22cm and minimum and maximum circumferences (13.74 vs 12.77 and 94.90 vs 89.10cm. No differences in other linear measures or body components were found. Fattening did not influence flesh colour or total lipid content, producing small differences in its chemical composition: greater C18:0, C18:1n9 and PUFAn6 percentages; higher putrescine and histamine (0.489 vs 0.335 and 0.666 vs 0.370mg/kg but lower spermine and spermidine (10.598 vs 17.387 and 2.420 vs 3.928mg/kg levels. Large differences in physico-chemical parameters were found between muscle sites and a significant interaction between sampling date and muscle site indicated non homogeneous changes in chemical composition of dorsal, ventral and red muscle after fattening. Sex only influenced fat content in viscera (C 12.84 vs ? 9.84%.

  9. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839

    Directory of Open Access Journals (Sweden)

    Beerli Peter

    2008-09-01

    Full Text Available Abstract Background Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour and physical (e.g. present-day ocean currents, past changes in sea temperature and levels factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and II, which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. Results We examined allele size variation of nine microsatellite loci in 380 individuals from the Gulf of Guinea, Canary, Azores, Canada, Indian Ocean, and Pacific Ocean. To investigate temporal stability of genetic structure, three Atlantic Ocean sites were re-sampled a second year. Hierarchical AMOVA tests, RST pairwise comparisons, isolation by distance (Mantel tests, Bayesian clustering analyses, and coalescence-based migration rate inferences supported unrestricted gene flow within the Atlantic Ocean at the nuclear level, and therefore interbreeding between individuals belonging to both mitochondrial clades. Moreover, departures from HWE in several loci were inferred for the samples of Guinea, and attributed to a Wahlund effect supporting the role of this region as a spawning and nursery area. Our microsatellite data supported a single worldwide panmictic unit for bigeye tunas. Despite the strong Agulhas Current, immigration rates seem to be higher from the Atlantic Ocean into the Indo-Pacific Ocean, but the actual number of individuals moving per generation is relatively low compared to the large population sizes inhabiting each ocean basin. Conclusion Lack of congruence between mt and nuclear evidences, which

  10. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839).

    Science.gov (United States)

    Gonzalez, Elena G; Beerli, Peter; Zardoya, Rafael

    2008-09-17

    Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour) and physical (e.g. present-day ocean currents, past changes in sea temperature and levels) factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and II), which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. We examined allele size variation of nine microsatellite loci in 380 individuals from the Gulf of Guinea, Canary, Azores, Canada, Indian Ocean, and Pacific Ocean. To investigate temporal stability of genetic structure, three Atlantic Ocean sites were re-sampled a second year. Hierarchical AMOVA tests, RST pairwise comparisons, isolation by distance (Mantel) tests, Bayesian clustering analyses, and coalescence-based migration rate inferences supported unrestricted gene flow within the Atlantic Ocean at the nuclear level, and therefore interbreeding between individuals belonging to both mitochondrial clades. Moreover, departures from HWE in several loci were inferred for the samples of Guinea, and attributed to a Wahlund effect supporting the role of this region as a spawning and nursery area. Our microsatellite data supported a single worldwide panmictic unit for bigeye tunas. Despite the strong Agulhas Current, immigration rates seem to be higher from the Atlantic Ocean into the Indo-Pacific Ocean, but the actual number of individuals moving per generation is relatively low compared to the large population sizes inhabiting each ocean basin. Lack of congruence between mt and nuclear evidences, which is also found in other species, most likely reflects

  11. Histamine formation and the freshness of yellowfin tuna (Thunnus albacares stored at different temperatures

    Directory of Open Access Journals (Sweden)

    B.K.K.K. Jinadasa

    2015-12-01

    Full Text Available This study was conducted to investigate the effect of storage temperatures on the shelf life of yellowfin tuna (YFT loins by studying of microbial, chemical and organoleptic changes. Shelf life of YFT was determined through changes in total aerobic bacterial plate counts (APC, total volatile basic nitrogen (TVB-N trimethylamine (TMA, organoleptic properties and histamine development during storage at 0, 4 and 7°C. Based on TVB-N value indices, YFT maintained an acceptable shelf life for 21, 17 and 12 days at 0, 4 and 7°C, respectively. Nevertheless, YFT was rejected earlier by the sensory panellists than their TVB-N value indicated. Histamine development was found to be lower than the European Union safety level for 100 mg/kg fish during storage at 0 and 7°C for 21 and 17 days, respectively. Aerobic bacteria initially dominated the micro-flora on YFT; however, as storage time increased, aerobic bacteria became dominant at cold storage, but the numbers exceeded the International Commission on Microbiological Specifications for Foods (ICMSF limit of 107 cfu/g in storage at 7°C after 17 days. Therefore, it can be concluded that the storage of fresh YFT in below 4°C has good enough to the shelf life of products (two weeks.

  12. Molecular Identification of Atlantic Bluefin Tuna (Thunnus thynnus, Scombridae Larvae and Development of a DNA Character-Based Identification Key for Mediterranean Scombrids.

    Directory of Open Access Journals (Sweden)

    Gregory Neils Puncher

    Full Text Available The Atlantic bluefin tuna, Thunnus thynnus, is a commercially important species that has been severely over-exploited in the recent past. Although the eastern Atlantic and Mediterranean stock is now showing signs of recovery, its current status remains very uncertain and as a consequence their recovery is dependent upon severe management informed by rigorous scientific research. Monitoring of early life history stages can inform decision makers about the health of the species based upon recruitment and survival rates. Misidentification of fish larvae and eggs can lead to inaccurate estimates of stock biomass and productivity which can trigger demands for increased quotas and unsound management conclusions. Herein we used a molecular approach employing mitochondrial and nuclear genes (CO1 and ITS1, respectively to identify larvae (n = 188 collected from three spawning areas in the Mediterranean Sea by different institutions working with a regional fisheries management organization. Several techniques were used to analyze the genetic sequences (sequence alignments using search algorithms, neighbour joining trees, and a genetic character-based identification key and an extensive comparison of the results is presented. During this process various inaccuracies in related publications and online databases were uncovered. Our results reveal important differences in the accuracy of the taxonomic identifications carried out by different ichthyoplanktologists following morphology-based methods. While less than half of larvae provided were bluefin tuna, other dominant taxa were bullet tuna (Auxis rochei, albacore (Thunnus alalunga and little tunny (Euthynnus alletteratus. We advocate an expansion of expertise for a new generation of morphology-based taxonomists, increased dialogue between morphology-based and molecular taxonomists and increased scrutiny of public sequence databases.

  13. Dietary evidence of mesopelagic and pelagic foraging by Atlantic bluefin tuna (Thunnus thynnus L.) during autumn migrations to the Iceland Basin

    DEFF Research Database (Denmark)

    Olafsdottir, Droplaug; MacKenzie, Brian; Chosson-P, Valérie

    2016-01-01

    Atlantic bluefin tuna (ABFT; Thunnus thynnus) is a large highly mobile predator fish species in the North Atlantic Ocean and Mediterranean Sea. Knowledge of its trophic role in marine food webs in summer feeding areas is presently based on recent (1980–2010s) sampling in the Bay of Biscay, Gulfs...... of Maine and St. Lawrence, and from historical (1950–1960s) sampling in the Norwegian-North Sea-Kattegat. No study has yet investigated the diets of ABFT in Icelandic waters, where it supported an experimental fishery during 1996–2005, nor in any region north of the Bay of Biscay since the 1960s. However......, north Atlantic temperatures and fish species distributions, including some ABFT prey species (e.g., mackerel) have been changing in the 2000s. New knowledge of ABFT diets in previously understudied parts of the species range will be useful for understanding factors affecting the trophic role, migration...

  14. Ecological role of bluefin tuna (Thunnus thynnus) fish farms for associated wild fish assemblages in the Mediterranean Sea.

    Science.gov (United States)

    Stagličić, Nika; Šegvić-Bubić, Tanja; Ugarković, Pero; Talijančić, Igor; Žužul, Iva; Tičina, Vjekoslav; Grubišić, Leon

    2017-12-01

    The ecological effects of tuna fish farms are largely undocumented. This study confirmed their high capacity to attract surrounding wild fish. The aggregation effect persisted year round, without detectable seasonal differences. Farm impact was restricted to close proximity of the sea cages, and was more prominent over the bottom than in the water column strata. Tuna fish farms proved to be high energy trophic resources, as indicated by the enhanced fitness status of two focal species, bogue and seabream. Under abundant food supply, seabream appear to allocate the majority of energy reserves to gonad development. Farm associated bogue had greater parasite loads, with no detrimental effect on fitness status. Overall, tuna fish farms can be regarded as population sources for aggregated wild fish, and under the no fishing conditions within the leasehold areas, can serve as functional marine protected areas. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. Physicochemical and sensory characterization of refined and deodorized tuna (Thunnus albacares) by-product oil obtained by enzymatic hydrolysis.

    Science.gov (United States)

    de Oliveira, Dayse A S B; Minozzo, Marcelo G; Licodiedoff, Silvana; Waszczynskyj, Nina

    2016-09-15

    In this study, the effects of chemical refining and deodorization on fatty acid profiles and physicochemical and sensory characteristics of the tuna by-product oil obtained by enzymatic hydrolysis were evaluated. Enzymatic extraction was conducted for 120 min at 60 °C and pH 6.5 using Alcalase at an enzyme-substrate ratio of 1:200 w/w. The chemical refining of crude oil consisted of degumming, neutralization, washing, drying, bleaching, and deodorization; deodorization was conducted at different temperatures and processing times. Although chemical refining was successful, temperature and chemical reagents favored the removal of polyunsaturated fatty acids (PUFA) from the oil. Aroma attributes of fishy odor, frying odor, and rancid odor predominantly contributed to the sensory evaluation of the product. Deodorization conditions of 160 °C for 1h and 200 °C for 1h were recommended for the tuna by-product oil, which is rich in PUFA. Copyright © 2016 Elsevier Ltd. All rights reserved.

  16. Development and validation of a spectrophotometry method for the determination of histamine in fresh tuna (Thunnus tunna)

    International Nuclear Information System (INIS)

    Chacon-Silva, Fainier; Barquero-Quiros, Miriam

    2002-01-01

    Histamine in foods can promote allergic reactions in sensitive persons. A colorimetric microscale method for histamine determination was developed and validated. Cu 2+ histamine chelation occurs at 9,5 ph. Dichloromethane extraction of the complex as the salt with tetrabromo phenolphthalein ethyl ester, allows photometric quantitation at 515 nm. The validation of micro method was accomplished trough its performance parameters, detection limit, quantitation limit, sensitivity, linearity, precision, recuperation. This methodology was applied to twenty raw tuna samples, collected in San Jose metropolitan area. It was found that 45% of analyzed samples had a histamine content in the range between 100-200 mg/kg. This finding indicates bacterial contamination, 15% of samples analyzed were over 500 mg/kg FDA level of sanitary risk. (Author) [es

  17. Preparation and characterization of protein isolate from Yellowfin tuna Thunnus albacares roe by isoelectric solubilization/precipitation process

    Directory of Open Access Journals (Sweden)

    Hyun Ji Lee

    2016-05-01

    Full Text Available Abstract Isoelectric solubilization/precipitation (ISP processing allows selective, pH-induced water solubility of proteins with concurrent separation of lipids and removal of materials not intended for human consumption such as bone, scales, skin, etc. Recovered proteins retain functional properties and nutritional value. Four roe protein isolates (RPIs from yellowfin tuna roe were prepared under different solubilization and precipitation condition (pH 11/4.5, pH 11/5.5, pH 12/4.5 and pH 12/5.5. RPIs contained 2.3–5.0 % moisture, 79.1–87.8 % protein, 5.6–7.4 % lipid and 3.0–3.8 % ash. Protein content of RPI-1 and RPI-2 precipitated at pH 4.5 and 5.5 after alkaline solubilization at pH 11, was higher than those of RPI-3 and RPI-4 after alkaline solubilization at pH 12 (P < 0.05. Lipid content (5.6–7.4 % of RPIs was lower than that of freeze-dried concentrate (10.6 %. And leucine and lysine of RPIs were the most abundant amino acids (8.8–9.4 and 8.5–8.9 g/100 g protein, respectively. S, Na, P, K as minerals were the major elements in RPIs. SDS-PAGE of RPIs showed bands at 100, 45, 25 and 15 K. Moisture and protein contents of process water as a 2’nd byproduct were 98.9–99.0 and 1.3–1.8 %, respectively. Therefore, yellowfin tuna roe isolate could be a promising source of valuable nutrients for human food and animal feeds.

  18. Chemical composition of protein concentrate prepared from Yellowfin tuna Thunnus albacares roe by cook-dried process

    Directory of Open Access Journals (Sweden)

    Hyun Ji Lee

    2016-05-01

    Full Text Available Abstract Roe is the term used to describe fish eggs (oocytes gathered in skeins and is one of the most valuable food products from fishery sources. Thus, means of processing are required to convert the underutilized yellowfin tuna roes (YTR into more marketable and acceptable forms as protein concentrate. Roe protein concentrates (RPCs were prepared by cooking condition (boil-dried concentrate, BDC and steam-dried concentrate, SDC, respectively and un-cooking condition (freeze-dried concentrate, FDC from yellowfin tuna roe. The yield of RPCs was in the range from 22.2 to 25.3 g/100 g of roe. RPCs contained protein (72.3–77.3 %, moisture (4.3–5.6 %, lipid (10.6–11.3 % and ash (4.3–5.7 % as the major constituents. The prominent amino acids of RPCs were aspartic acid, 8.7–9.2, glutamic acid, 13.1–13.2, and leucine, 8.5–8.6 g/100 g of protein. Major differences were not observed in each of the amino acid. K, S, Na, and P as minerals were the major elements in RPCs. No difference noted in sodium dodecyl sulfate polyacrylamide gel electrophoresis protein band (15–100 K possibly representing partial hydrolysis of myosin. Therefore, RPCs from YTR could be use potential protein ingredient for human food and animal feeds.

  19. Spatial and temporal variability in the trans-Pacific migration of Pacific bluefin tuna (Thunnus orientalis) revealed by archival tags

    Science.gov (United States)

    Fujioka, Ko; Fukuda, Hiromu; Tei, Yaoki; Okamoto, Suguru; Kiyofuji, Hidetada; Furukawa, Seishiro; Takagi, Junichi; Estess, Ethan; Farwell, Charles J.; Fuller, Daniel W.; Suzuki, Nobuaki; Ohshimo, Seiji; Kitagawa, Takashi

    2018-03-01

    Archival electronic tags were internally implanted in 713 age-0 Pacific bluefin tuna (PBF) caught in their nursery waters off the southern coast of Japan and in the East China Sea over an extended study period (1995-2015) to clarify the spatial and temporal variability of their trans-Pacific migration. Two hundred twenty-five of these tagged tuna were recaptured by fisheries (31.6%), and we successfully retrieved tag data from 14 of 21 individuals recovered in the Eastern pacific. Furthermore, one archival tag recovered in the Western Pacific revealed that the individual had performed a trans-Pacific migration, so in total 21 tagged PBF were shown to have migrated to the Eastern Pacific (2.9% of the total tags released). We successfully downloaded data from 15 of these 21 archival tags, which revealed that some age-1 PBF migrate rapidly (123.9 ± 82.8 km day-1) and directly from waters offshore of Japan to the eastern Pacific (160.0°E to 130.0°W), a journey that takes an average of 2.5 months (ranging from 1.2 to 5.5 months) through relatively cool waters (14.7 ± 2.0 °C). All juvenile PBF began their trans-Pacific migration shortly after exposure to cooler water temperatures (physiological challenge for this age class. Three patterns were identified in the timing of the departure of juvenile PBF from the western Pacific: departing 12-14 months post-hatch (N = 7) in early summer (May-July), departing 17-19 months post-hatch (N = 7) in late autumn (October-December), and departing 21 months post-hatch (N = 1) in late winter (February). The PBF tagged along the southern coast of Japan (SCJ) arrived in the eastern Pacific earlier than those tagged in the East China Sea (ECS), most likely due to the shorter travel distance. Additionally, the PBF that began their trans-Pacific migration in the earlier period remained in an offshore foraging zone (the Kuroshio-Oyashio transition region) for shorter periods (2.8 months on average) and at lower latitudes (35.0

  20. Standardization of a geo-referenced fishing data set for the Indian Ocean bigeye tuna, Thunnus obesus (1952-2014)

    Science.gov (United States)

    Wibawa, Teja A.; Lehodey, Patrick; Senina, Inna

    2017-02-01

    Geo-referenced catch and fishing effort data of the bigeye tuna fisheries in the Indian Ocean over 1952-2014 were analyzed and standardized to facilitate population dynamics modeling studies. During this 62-year historical period of exploitation, many changes occurred both in the fishing techniques and the monitoring of activity. This study includes a series of processing steps used for standardization of spatial resolution, conversion and standardization of catch and effort units, raising of geo-referenced catch into nominal catch level, screening and correction of outliers, and detection of major catchability changes over long time series of fishing data, i.e., the Japanese longline fleet operating in the tropical Indian Ocean. A total of 30 fisheries were finally determined from longline, purse seine and other-gears data sets, from which 10 longline and 4 purse seine fisheries represented 96 % of the whole historical geo-referenced catch. Nevertheless, one-third of total nominal catch is still not included due to a total lack of geo-referenced information and would need to be processed separately, accordingly to the requirements of the study. The geo-referenced records of catch, fishing effort and associated length frequency samples of all fisheries are available at PANGAEA.864154" target="_blank">doi:10.1594/PANGAEA.864154.

  1. Accounting for age uncertainty in growth modeling, the case study of yellowfin tuna (Thunnus albacares of the Indian Ocean.

    Directory of Open Access Journals (Sweden)

    Emmanuelle Dortel

    Full Text Available Age estimates, typically determined by counting periodic growth increments in calcified structures of vertebrates, are the basis of population dynamics models used for managing exploited or threatened species. In fisheries research, the use of otolith growth rings as an indicator of fish age has increased considerably in recent decades. However, otolith readings include various sources of uncertainty. Current ageing methods, which converts an average count of rings into age, only provide periodic age estimates in which the range of uncertainty is fully ignored. In this study, we describe a hierarchical model for estimating individual ages from repeated otolith readings. The model was developed within a Bayesian framework to explicitly represent the sources of uncertainty associated with age estimation, to allow for individual variations and to include knowledge on parameters from expertise. The performance of the proposed model was examined through simulations, and then it was coupled to a two-stanza somatic growth model to evaluate the impact of the age estimation method on the age composition of commercial fisheries catches. We illustrate our approach using the sagittal otoliths of yellowfin tuna of the Indian Ocean collected through large-scale mark-recapture experiments. The simulation performance suggested that the ageing error model was able to estimate the ageing biases and provide accurate age estimates, regardless of the age of the fish. Coupled with the growth model, this approach appeared suitable for modeling the growth of Indian Ocean yellowfin and is consistent with findings of previous studies. The simulations showed that the choice of the ageing method can strongly affect growth estimates with subsequent implications for age-structured data used as inputs for population models. Finally, our modeling approach revealed particularly useful to reflect uncertainty around age estimates into the process of growth estimation and it can

  2. Habitat use, vertical and horizontal behaviour of Atlantic bluefin tuna (Thunnus thynnus) in the Northwestern Mediterranean Sea in relation to oceanographic conditions

    Science.gov (United States)

    Bauer, Robert Klaus; Fromentin, Jean-Marc; Demarcq, Hervé; Bonhommeau, Sylvain

    2017-07-01

    We investigated the habitat utilization, vertical and horizontal behaviour of Atlantic bluefin tuna Thunnus thynnus (ABFT) in relation to oceanographic conditions in the northwestern Mediterranean Sea, based on 36 pop-up archival tags and different environmental data sets. Tags were deployed on early mature ABFT (127-255 cm) between July and November in 2007-2014, on the shelf area off Marseille, France. The data obtained from these tags provided 1643 daily summaries of ABFT vertical behaviour over 8 years of tag deployment. Based on a hierarchical clustering of this data, we could identify four principle daily vertical behaviour types, representing surface (≦ 10 m) and subsurface (10-100 m) orientation, moderate (50-200 m) and deep (≧ 200 m) diving behaviour. These vertical behaviour types showed seasonal variations with partly opposing trends in their frequencies. Accordingly, ABFT were more surface orientated during summer, while moderate diving behaviour was more common during winter. Depth time series data further revealed inverted day-night patterns for both of these periods. Tagged ABFT frequented the surface waters more regularly during daytime and deeper waters during the night in summer, while the opposite pattern was found in winter. Seasonal changes in the vertical behaviour of ABFT were accompanied by simultaneous changes in environmental conditions (SST, chla, thermal stratification). Accordingly, surface orientation and moderate diving behaviour appeared to be triggered by the thermal stratification of the water column, though less pronounced than previously reported for ABFT in the North Atlantic, probably indicating adaptive vertical behaviour related to the availability of epipelagic food resources (anchovies and sardines). Deep diving behaviour was particularly frequent during months of high biological productivity (February-May), although one recovered tag showed periodic and unusual long spike dives during summer-autumn, in relation to

  3. Genetic homogeneity in longtail tuna Thunnus tonggol (Bleeker, 1851) from the northwest coast of India inferred from direct sequencing analysis of the mitochondrial DNA D-loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar; Menezes, M.R.; Meena, R.M.

    of population differentiation showed no significant genetic differentiation between the two sampling localities (~HST = 0.005, P = 0.200) Results were further corroborated by a non-significant nearest-neighbour statistic (Snn = 0.489, P = 0...

  4. Significant histamine formation in tuna ( Thunnus albacares ) at 2 degrees C - effect of vacuum- and modified atmosphere-packaging on psychrotolerant bacteria

    DEFF Research Database (Denmark)

    Emborg, Jette; Laursen, B. G.; Dalgaard, Paw

    2005-01-01

    Occurrence and importance of psychrotolerant histamine producing bacteria in chilled fresh tuna were demonstrated in the present study. The objective was to evaluate microbial formation of histamine and biogenic amines in chilled fresh tuna from the Indian Ocean and stored either vacuum-packed (VP...

  5. FLUKTUASI DAN KOMPOSISI HASIL TANGKAPAN TUNA NERITIK TERTANGKAP JARING INSANG DI PERAIRAN LAUT CINA SELATAN

    Directory of Open Access Journals (Sweden)

    Arief Wujdi

    2016-03-01

    S - 04°57’ N; dan 104°65’-110°00’ E. Catch of neritic tuna species is fluctuating and there is a similar pattern which is the highest catches occurred in October and November. Catch per unit of effort values also fluctuated and tend to be increased where the highest occurred in November 2011 and 2012, for 402.85 and 444.57 kg/day/trip respectively. Monthly catch composition of neritic tuna species was varied and dominated by kawakawa (Euthynnus affinis 49,7%; longtail tuna (Thunnus tonggol 33,4%; narrow-bared Spanish mackerel (Scomberomorus commerson 15,9%; and Indo-Pasific king mackerel (Scomberomorus guttatus only 1%. Euthynnus affinis more abundant among June-November during east monsoon to east-west transition monsoon, meanwhile Thunnus tonggol was abundant in west monsoon (January-February.

  6. A large outbreak of scombroid fish poisoning associated with eating yellowfin tuna (Thunnus albacares) at a military mass catering in Dakar, Senegal.

    Science.gov (United States)

    Demoncheaux, J-P; Michel, R; Mazenot, C; Duflos, G; Iacini, C; de Laval, F; Delaval, F; Saware, E M; Renard, J-C

    2012-06-01

    On 26 November 2010, an outbreak of scombroid fish poisoning occurred in the French Armed Forces in Dakar, Senegal. This chemical intoxication, due to high histamine concentration in fish, is often mistaken for an allergic reaction. A case-control study was undertaken including the 71 cases and 78 randomly selected controls among lunch attendees. The usual symptoms for scombroid fish poisoning were observed in cases, i.e. flushing (85.9%), headache (83.1%), rapid/weak pulse (59.1%) and diarrhoea (47.9%). Symptoms occurred from within a few minutes to up to 3 h following the meal. Most patients quickly recovered with antihistamine and/or symptomatic treatment. Tuna was the only food item positively associated with illness (odds ratio 36.3, 95% confidence interval 6.3-210.0), with the risk of illness increasing with the quantity of fish consumed. No bacterial contamination was found in leftover food, but histamine concentration in tuna was found to be 4900 mg/kg, almost 50-fold higher than the concentration allowed by European regulations. This report is unique because of the large size of the case series - to our knowledge, the largest event of scombroid fish poisoning ever reported - and the chemical and bacteriological analyses results obtained on leftover food.

  7. Incorporation of habitat information in the development of indices of larval bluefin tuna (Thunnus thynnus) in the Western Mediterranean Sea (2001-2005 and 2012-2013)

    Science.gov (United States)

    Ingram, G. Walter; Alvarez-Berastegui, Diego; Reglero, Patricia; Balbín, Rosa; García, Alberto; Alemany, Francisco

    2017-06-01

    Fishery independent indices of bluefin tuna larvae in the Western Mediterranean Sea are presented utilizing ichthyoplankton survey data collected from 2001 through 2005 and 2012 through 2013. Indices were developed using larval catch rates collected using two different types of bongo sampling, by first standardizing catch rates by gear/fishing-style and then employing a delta-lognormal modeling approach. The delta-lognormal models were developed three ways: 1) a basic larval index including the following covariates: time of day, a systematic geographic area variable, month and year; 2) a standard environmental larval index including the following covariates: mean water temperature over the mixed layer depth, mean salinity over the mixed layer depth, geostrophic velocity, time of day, a systematic geographic area variable, month and year; and 3) a habitat-adjusted larval index including the following covariates: a potential habitat variable, time of day, a systematic geographic area variable, month and year. Results indicated that all three model-types had similar precision in index values. However, the habitat-adjusted larval index demonstrated a high correlation with estimates of spawning stock biomass from the previous stock assessment model, and, therefore, is recommended as a tuning index in future stock assessment models.

  8. Trophic ecology of Atlantic Bluefin Tuna (Thunnus thynnus [corrected] larvae from the Gulf of Mexico and NW Mediterranean spawning grounds: A Comparative Stable Isotope Study.

    Directory of Open Access Journals (Sweden)

    Raúl Laiz-Carrión

    Full Text Available The present study uses stable isotopes of nitrogen and carbon (δ15Nandδ13C as trophic indicators for Atlantic bluefin tuna larvae (BFT (6-10 mm standard length in the highly contrasting environmental conditions of the Gulf of Mexico (GOM and the Balearic Sea (MED. These regions are differentiated by their temperature regime and relative productivity, with the GOM being significantly warmer and more productive. MED BFT larvae showed the highest δ15N signatures, implying an elevated trophic position above the underlying microzooplankton baseline. Ontogenetic dietary shifts were observed in the BFT larvae from the GOM and MED which indicates early life trophodynamics differences between these spawning habitats. Significant trophic differences between the GOM and MED larvae were observed in relation to δ15N signatures in favour of the MED larvae, which may have important implications in their growth during their early life stages.These low δ15N levels in the zooplankton from the GOM may be an indication of a shifting isotopic baseline in pelagic food webs due to diatrophic inputs by cyanobacteria. Lack of enrichment for δ15N in BFT larvae compared to zooplankton implies an alternative grazing pathway from the traditional food chain of phytoplankton-zooplankton-larval fish. Results provide insight for a comparative characterization of the trophic pathways variability of the two main spawning grounds for BFT larvae.

  9. Identification of parvalbumin and two new thermolabile major allergens of Thunnus tonggol using a proteomics approach.

    Science.gov (United States)

    Rosmilah, Misnan; Shahnaz, Murad; Meinir, Jones; Masita, Arip; Noormalin, Abdullah; Jamaluddin, Mohamed

    2013-01-01

    The longtail tuna (Thunnus tonggol) is widely consumed in Asia. Parvalbumin, the main major allergen of fish, has been well identified in multiple fish species, yet little is known about the allergenic proteins in T. tonggol. Thus, the aim of this study was to characterize the major allergens of T. tonggol using a proteomics approach. Raw and boiled extracts of the fish were prepared. Fish proteins were separated by means of SDS-PAGE and two-dimensional (2-DE) electrophoresis. 1-DE immunoblotting of raw extract was performed with sera from fish-allergic patients. Ten sera were further analysed by 2-DE immunoblotting. Selected major allergenic protein spots were excised, trypsin digested and analysed by means of mass spectrometry. SDS-PAGE of raw extract revealed 26 protein fractions, while boiled extract demonstrated fewer bands. The 2-DE gel profile of the raw extract further fractionated the protein bands to more than 100 distinct protein spots. 1-DE immunoblotting of raw extract exhibited two thermolabile protein fractions of 42 and 51 kDa as the major allergens, while the boiled extract only revealed a single IgE-binding band at 151 kDa. 2-DE immunoblotting of raw extract further detected numerous major IgE-reactive spots of 11-13, 42 and 51 kDa. Mass spectrometry analysis of the peptides generated from the 12, 42 and 51 kDa digested spots indicated that these spots were parvalbumin, creatine kinase and enolase, respectively. In addition to parvalbumin, two new thermolabile allergens were identified as major allergenic proteins of T. tonggol. This study proved that both thermostable and thermolabile proteins are important in local tuna allergy and should be included in diagnostic strategies.

  10. OPTIMASI KONDISI PEMURNIAN ASAM LEMAK OMEGA-3 DARI MINYAK HASIL SAMPING PENEPUNGAN TUNA (Thunnus sp DENGAN KRISTALISASI UREA [Optimizing Conditions for the Purification of Omega-3 Fatty Acids from By-product of Tuna (Thunnus sp Meal Processing by Urea Crystallization

    Directory of Open Access Journals (Sweden)

    Teti Estiasih1*

    2009-12-01

    Full Text Available Omega-3 fatty acids (-3 are proven to have health beneficial effects. Some effort had been done to obtained oil high in -3 fatty acids. Among the methods developed, urea crystallization was preferred because it is simple, economic, and result in high purity of fatty acids. A source that had not been widely explored for -3 fatty acids production is the by-product of tuna meal processing. This research studied the optimization condition for separation and purification of -3 fatty acids from the by-product of tuna meal processing by urea crystallization. Crystallization reaction conditions of urea inclusion were optimized using the response surface methodology, and the model was developed.Optimization result showed a quadratic polynomial regression equation of Y= 140,52677X1 + 8,38203X2 – 19,85850X12 – 0,12173X22 – 0,74000X1X2 – 240,33546 with X1=urea to fatty acid ratio and X2=crystallization time. Maximum response was obtained at urea to fatty acid ratio of 3,07:1,crystallization time of 25,10 hours, and predicted response was 80,60%. Analysis of variance showed that urea to fatty acid ratio and crystallization time affected response. Under optimal conditions, the product was 3.89 times concentrated and the purity of -3 fatty acids was 81,98%. Verification result revealed that the predicted value from this model was reasonably close to the experimentally observed value. Urea crystallization process changed quality parameters that were oxidation level (peroxide value, anisidin value, and totox value, Fe and Cu content, P content, and water content. The changes were caused by adsorption of primary and secondary oxidation products, part of metals, and phosphoric compound onto unsaponifiable matters or soluble into water.

  11. Spawning of bluefin tuna in the black sea: historical evidence, environmental constraints and population plasticity

    DEFF Research Database (Denmark)

    Mackenzie, Brian R; Mariani, Patrizio

    2012-01-01

    The lucrative and highly migratory Atlantic bluefin tuna, Thunnus thynnus (Linnaeus 1758; Scombridae), used to be distributed widely throughout the north Atlantic Ocean, Mediterranean Sea and Black Sea. Its migrations have supported sustainable fisheries and impacted local cultures since antiquity...

  12. Evolutionary changes of multiple visual pigment genes in the complete genome of Pacific bluefin tuna

    OpenAIRE

    Nakamura, Yoji; Mori, Kazuki; Saitoh, Kenji; Oshima, Kenshiro; Mekuchi, Miyuki; Sugaya, Takuma; Shigenobu, Yuya; Ojima, Nobuhiko; Muta, Shigeru; Fujiwara, Atushi; Yasuike, Motoshige; Oohara, Ichiro; Hirakawa, Hideki; Chowdhury, Vishwajit Sur; Kobayashi, Takanori

    2013-01-01

    Tunas are migratory fishes in offshore habitats and top predators with unique features. Despite their ecological importance and high market values, the open-ocean lifestyle of tuna, in which effective sensing systems such as color vision are required for capture of prey, has been poorly understood. To elucidate the genetic and evolutionary basis of optic adaptation of tuna, we determined the genome sequence of the Pacific bluefin tuna (Thunnus orientalis), using next-generation sequencing tec...

  13. STOMACH CONTENT OF THREE TUNA SPECIES IN THE EASTERN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2012-12-01

    Full Text Available Feeding habit of tuna in Indian Ocean has been described around Sri Lanka, Indian Waters, Andaman Sea, western Indian Ocean (Seychelles Islands, western equatorial Indian Ocean whereas the tunas feeding habit study in Eastern Indian Oceanis merely in existence. The purpose of this study is to investigate the stomach content of three tuna species (bigeye tuna, yellowfin tuna, and skipjack tuna, apex predator in the southern part of Eastern Indian Ocean. The study was conducted in March – April, 2010 on the basis of catches of commercial tuna longline vessel based in Port of Benoa. A total of 53 individual fishes were collected, consisting of bigeye tuna (Thunnus obesus, yellowfin tuna (Thunnus albacores, and skipjack tuna (Katsuwonus pelamis. Stomach specimens were collected and analyzed.Analysis was conducted on the basis of index of preponderance method. The diet of the three tuna species showed fishes as the main diet (56–82%, followed by cephalopods (squids as the complementary diet (0–8%, and crustaceans (shrimps as the additional diet (2–4%. Fish prey composed of 6 families i.e. Alepisauridae, Bramidae, Carangidae, Clupeidae, Engraulidae, and Scombridae.

  14. Pelagic shark bycatch in the tuna- and swordfish-directed longline ...

    African Journals Online (AJOL)

    The capture of pelagic sharks as bycatch of the South African pelagic longline fleet targeting tuna Thunnus spp. and swordfish Xiphias gladius was investigated during the period 1998–2005. In all, 26 species were caught, of which six are listed by the International Union for Conservation of Nature (IUCN) as Vulnerable and ...

  15. [Association of the abundance and vertical distribution of tuna and beakfish in the southeast of the Caribbean sea].

    Science.gov (United States)

    Eslava, Nora; González, Leo W; Gaertner, Daniel

    2003-03-01

    The longline hooks suspension depth was estimated using the Mechanic Imitation of Flexible Systems method. The vertical distribution of tunas and billfish was determined by the relative abundance index, obtained from the catch by 11 to 25 m -long longline vessels, -based at Cumaná, Venezuela, South-eastern Caribbean Sea in depths of 65 to 142 m. The CPUE was evaluated per species, according to depth. High values were found for most of the captured species in the layer from 105 to 125 m. Yellowfin tuna (Thunnus albacares) showed the highest yield (3.37 fish/100 hooks) and blue marlin (Makaira nigricans) the lowest (0.04 fish/100 hooks). However, the statistical comparison did not allow to reject the hypothesis of lack of depth efect (Kruskal-Wallis p > .05), and demonstrated a homogeneous distribution of yellowfin tuna (Thunnus albacares), albacore (Thunnus alalunga), bigeye tuna (Thunnus obesus), sailfish (Istiophorus albicans), white marlin (Tetrapturus albidus) and blue marlin (Makaira nigricans) in the water column. The conclusion is that fish concentration in the Southern border of the Caribbean Sea is possibly due to several hydroclimatic factors--which affect tuna and billfish catching--such as water temperature and dissolved oxygen concentration which limit the distribution according to depth.

  16. Keragaman Spesies Ikan Tuna di Pasar Ikan Kedonganan Bali dengan Analisis Sekuen Kontrol Daerah Mitokondria DNA (SPECIES DIVERSITY OF TUNA FISH USING MITOCHONDRIAL DNA CONTROL REGION SEQUENCE ANALYSIS AT KEDONGANAN FISH MARKET

    Directory of Open Access Journals (Sweden)

    Daud Steven Triyomi Hariyanto

    2015-10-01

    Full Text Available Tuna is an export commodity which has very high economic value. However, some tuna speciesare threatened with extinction. The purpose of this study was to identify the tuna species that aresold in Kedonganan Fish Market. The research method was polymerase chain reaction technique(PCR using the marker sequence mitochondrial DNA control region. Samples were obtained fromthe Fish Market tuna Kedonganan, Kuta, Badung, Bali. The total number of samples are 28specimens. Sequence from each sample was obtained through sequencing techniques. Sequencesobtained were run in BLAST (Basic Local Alignment Search Tool and subsequently analyzed withMEGA 5 for species confirmation. Three species of tuna that are identified in the Kedonganan FishMarket is: Thunnus albacares, T. obesus, and Katsuwonus pelamis. All three species have highgenetic variation HD = 1. This study needed to be continued with more number of samples todetermine the species of tuna sold in Kedonganan Fish Market.

  17. MASS SPECTROMETRIC ANALYSIS FOR THE IDENTIFICATION OF THUNNUS GENUS FOUR SPECIES

    Directory of Open Access Journals (Sweden)

    T. Pepe

    2011-01-01

    Full Text Available An accurate identification of similar fish species is necessary to prevent illegal substitution and is imposed by labeling regulations in UE countries (1. The genus Thunnus comprises many species of different quality and commercial value. The increasing trade of fish preparations of the species included in this genus and the consequent loss of the external anatomical and morphological features enables fraudulent substitutions. This study reports data relating to the proteomic analysis of four tuna species (T. thynnus, T. alalunga, T. albacares, T. obesus. Sarcoplasmic proteins were studied by mono and two dimensional electrophoresis. The most significant proteins for the characterization of the species were analyzed by mass spectrometric techniques. As reported in a previous study (2, an accurate identification of the species seems possible, owing to the polymorphism displayed by the species of the Thunnus genus.

  18. SEBARAN HASIL TANGKAPAN MADIDIHANG (Thunnus albacares Bonnaterre, 1788 DI SAMUDERA HINDIA BAGIAN TIMUR

    Directory of Open Access Journals (Sweden)

    Arief Wujdi

    2015-06-01

    Full Text Available Ikan Madidihang (Thunnus albacares Bobbaterre, 1788 merupakan salah satu komoditaspenting bagi industri perikanan di Indonesia dimana hasil tangkapannya merupakan yang tertinggi dibandingkan jenis tuna lainnya. Saat ini, kondisi stok madidihang berada dalam kondisi yang baik. Namun, untuk menjaga kelangsungan pemantaatan stok ikan tuna, diperlukan upaya pengelolaan sumber daya tuna. Penelitian ini bertujuan untuk mengetahui distribusi laju tangkap madidihang di Samudera Hindia Bagian Timur. Pengumpulan data dilakukan oleh pemantau ilmiah pada kapal rawai tuna komersial yang berbasis di Benoa, Pelabuhanratu dan Bungus dari Agustus 2005 sampai Desember 2013; serta program monitoring pendaratan tuna yang berbasis di Benoa tahun 2010-2013. Hasil penelitian menunjukkan bahwa laju pancing bervariasi secara bulanan dan tahunan. Rata-rata bulanan laju pancing tertinggi terjadi pada Mei (0,17 ekor/100 pancing dan terendah pada Februari (0,01 ekor/100 pancing, sedangkan rata-rata laju pancing tahunan tertinggi pada 2006 (0,11 ekor/100 pancing dan terendah pada 2011 (0,06 ekor/100 pancing. Rata-rata laju pancing tahunan cenderung mengalami penurunan sebesar 29,48%/ tahun. Ikan madidihang tertangkap oleh rawai tuna Indonesia tersebar dari 0°-34° LS dan 76°-134° BT. Sebaran spasial laju pancing tertinggi berada di sekitar Kepulauan Mentawai dan selatan Jawa Timur hingga Nusa Tenggara. Yellowfin tuna (Thunnus albacares Bobbaterre, 1788 is one of the important commodity for the fishing industry in Indonesia because it has the highest catches compared with other tunas. Nowadays, the yellowfin stock is currently in good condition (not overfished and not subject to overfishing. However, management measure was required to support sustainability of tuna fishery. This study aims to determine the hook rate distribution of yellowfin tuna in the Eastern Indian Ocean. Data was obtained by scientific observers on commercial tuna longline vessels

  19. A spatial ecosystem and populations dynamics model (SEAPODYM) Modeling of tuna and tuna-like populations

    Science.gov (United States)

    Lehodey, Patrick; Senina, Inna; Murtugudde, Raghu

    2008-09-01

    An enhanced version of the spatial ecosystem and population dynamics model SEAPODYM is presented to describe spatial dynamics of tuna and tuna-like species in the Pacific Ocean at monthly resolution over 1° grid-boxes. The simulations are driven by a bio-physical environment predicted from a coupled ocean physical-biogeochemical model. This new version of SEAPODYM includes expanded definitions of habitat indices, movements, and natural mortality based on empirical evidences. A thermal habitat of tuna species is derived from an individual heat budget model. The feeding habitat is computed according to the accessibility of tuna predator cohorts to different vertically migrating and non-migrating micronekton (mid-trophic) functional groups. The spawning habitat is based on temperature and the coincidence of spawning fish with presence or absence of predators and food for larvae. The successful larval recruitment is linked to spawning stock biomass. Larvae drift with currents, while immature and adult tuna can move of their own volition, in addition to being advected by currents. A food requirement index is computed to adjust locally the natural mortality of cohorts based on food demand and accessibility to available forage components. Together these mechanisms induce bottom-up and top-down effects, and intra- (i.e. between cohorts) and inter-species interactions. The model is now fully operational for running multi-species, multi-fisheries simulations, and the structure of the model allows a validation from multiple data sources. An application with two tuna species showing different biological characteristics, skipjack ( Katsuwonus pelamis) and bigeye ( Thunnus obesus), is presented to illustrate the capacity of the model to capture many important features of spatial dynamics of these two different tuna species in the Pacific Ocean. The actual validation is presented in a companion paper describing the approach to have a rigorous mathematical parameter optimization

  20. Modelling retention and dispersion mechanisms of bluefin tuna eggs and larvae in the Northwest Mediterranean Sea

    DEFF Research Database (Denmark)

    Mariani, Patrizio; MacKenzie, Brian; Iudicone, D.

    2010-01-01

    Knowledge of early life history of most fish species in the Mediterranean Sea is sparse and processes affecting their recruitment are poorly understood. This is particularly true for bluefin tuna, Thunnus thynnus, even though this species is one of the world's most valued fish species. Here we...... develop, apply and validate an individually based coupled biological-physical oceanographic model of fish early life history in the Mediterranean Sea. We first validate the general structure of the coupled model with a 12-day Lagrangian drift study of anchovy (Engraulis encrasicolus) larvae in the Catalan...... mesoscale processes in the Balearic area and thus potentially affect bluefin tuna larvae. These modelling approaches can increase understanding of bluefin tuna recruitment processes and eventually contribute to management of bluefin tuna fisheries....

  1. Mercury in tunas and blue marlin in the North Pacific Ocean.

    Science.gov (United States)

    Drevnick, Paul E; Brooks, Barbara A

    2017-05-01

    Models and data from the North Pacific Ocean indicate that mercury concentrations in water and biota are increasing in response to (global or hemispheric) anthropogenic mercury releases. In the present study, we provide an updated record of mercury in yellowfin tuna (Thunnus albacares) caught near Hawaii that confirms an earlier conclusion that mercury concentrations in these fish are increasing at a rate similar to that observed in waters shallower than 1000 m. We also compiled and reanalyzed data from bigeye tuna (Thunnus obesus) and blue marlin (Makaira nigricans) caught near Hawaii in the 1970s and 2000s. Increases in mercury concentrations in bigeye tuna are consistent with the trend found in yellowfin tuna, in both timing and magnitude. The data available for blue marlin do not allow for a fair comparison among years, because mercury concentrations differ between sexes for this species, and sex was identified (or reported) in only 3 of 7 studies. Also, mercury concentrations in blue marlin may be insensitive to modest changes in mercury exposure, because this species appears to have the ability to detoxify mercury. The North Pacific Ocean is a region of both relatively high rates of atmospheric mercury deposition and capture fisheries production. Other data sets that allow temporal comparisons in mercury concentrations, such as pacific cod (Gadus macrocephalus) in Alaskan waters and albacore tuna (Thunnus alalunga) off the US Pacific coast, should be explored further, to aid in understanding human health and ecological risks and to develop additional baseline knowledge for assessing changes in a region expected to respond strongly to reductions in anthropogenic mercury emissions. Environ Toxicol Chem 2017;36:1365-1374. © 2017 SETAC. © 2017 SETAC.

  2. Tuna Species Substitution in the Spanish Commercial Chain: A Knock-On Effect.

    Directory of Open Access Journals (Sweden)

    Ana Gordoa

    Full Text Available Intentional mislabelling of seafood is a widespread problem, particularly with high-value species like tuna. In this study we examine tuna mislabelling, deliberate species substitution, types of substitution and its impact on prices. The survey covered the commercial chain, from Merca-Barna to fishmongers and restaurants in the Spanish Autonomous Community of Catalonia. To understand the geographic extent of the problem we also sampled Merca-Madrid, Europe's biggest fish market, and Merca-Málaga for its proximity to the bluefin tuna migratory route and trap fishery. Monthly surveys were carried out over one year. The results showed a high deficiency in labelling: 75% of points of sale and 83% of restaurants did not specify the species, and in those cases the name of the species had to be asked. A total of 375 samples were analysed genetically, the largest dataset gathered in Europe so far. The identified species were Thunnus albacares, Thunnus thynnus and Thunnus obesus. Species substitution began at suppliers, with 40% of observed cases, increasing to 58% at fishmongers and 62% at restaurants. The substitution was mainly on bluefin tuna (T. thynnus, 73% of cases. At restaurants, only during the bluefin fishing season, we observed a decrease of Bluefin tuna substitution and an increase of reverse substitution revealing some illegal fishing. The effect of species substitution on species prices was relevant: T. obesus increased its price by around €12 kg-1 when it was sold as bluefin. In view of the deficiency of labelling, the abuse of generic names and the lack of the bluefin catch document, we conclude that the Spanish regulations are ineffective, highlighting the need for policy execution, and the urgent need for information campaigns to Spanish consumers.

  3. Application of the Oxidation-Reduction Potential (ORP) for Pre-grading Tuna Freshness On-board

    Science.gov (United States)

    Cheevaporanapivat, Mongkol; Sakai, Hisaharu; Mine, Yuuji; Watanabe, Manabu; Suzuki, Toru

    Application of ORP as a rapid indicator for grading tuna's freshness on the ship was studied. The long line trawling process was used for catching the sample tuna in the South Pacific Ocean. All captured sample tuna were weighed, gender identified and investigated for their mortality, then measured ORP and K value. Three species of tuna were caught: blue marlin (Makaira mazara), yellow fin tuna (Thunnus albacares), and swordfish (Xiphia gladius). Most of the fish captured were male and they had been dead after picking onboard. The measured ORP values of blue marlin varied in the range of 0.295-0.362 Volt, with pH between 5.35-5.84. Both ORP and pH of swordfish was similar to that of blue marlin. But for yellow fin tuna, the ORP value was about the same as blue marlin while its pH was significantly higher. ORP value in all species tended to increase with pH of the fish meat decrease. It is interesting that ORP value of tuna increased in correlation with K value. These results suggested that ORP and pH change, which are measured in the short time, are the effective indicators for grading tuna's freshness on-board.

  4. A full lifecycle bioenergetic model for bluefin tuna.

    Directory of Open Access Journals (Sweden)

    Marko Jusup

    Full Text Available We formulated a full lifecycle bioenergetic model for bluefin tuna relying on the principles of Dynamic Energy Budget theory. Traditional bioenergetic models in fish research deduce energy input and utilization from observed growth and reproduction. In contrast, our model predicts growth and reproduction from food availability and temperature in the environment. We calibrated the model to emulate physiological characteristics of Pacific bluefin tuna (Thunnus orientalis, hereafter PBT, a species which has received considerable scientific attention due to its high economic value. Computer simulations suggest that (i the main cause of different growth rates between cultivated and wild PBT is the difference in average body temperature of approximately 6.5°C, (ii a well-fed PBT individual can spawn an average number of 9 batches per spawning season, (iii food abundance experienced by wild PBT is rather constant and sufficiently high to provide energy for yearly reproductive cycle, (iv energy in reserve is exceptionally small, causing the weight-length relationship of cultivated and wild PBT to be practically indistinguishable and suggesting that these fish are poorly equipped to deal with starvation, (v accelerated growth rate of PBT larvae is connected to morphological changes prior to metamorphosis, while (vi deceleration of growth rate in the early juvenile stage is related to efficiency of internal heat production. Based on these results, we discuss a number of physiological and ecological traits of PBT, including the reasons for high Feed Conversion Ratio recorded in bluefin tuna aquaculture.

  5. RAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas

    KAUST Repository

    Díaz-Arce, Natalia

    2016-06-07

    Although species from the genus Thunnus include some of the most commercially important and most severely overexploited fishes, the phylogeny of this genus is still unresolved, hampering evolutionary and traceability studies that could help improve conservation and management strategies for these species. Previous attempts based on mitochondrial and nuclear markers were unsuccessful in inferring a congruent and reliable phylogeny, probably due to mitochondrial introgression events and lack of enough phylogenetically informative markers. Here we infer the first genome-wide nuclear marker-based phylogeny of tunas using restriction site associated DNA sequencing (RAD-seq) data. Our results, derived from phylogenomic inferences obtained from 128 nucleotide matrices constructed using alternative data assembly procedures, support a single Thunnus evolutionary history that challenges previous assumptions based on morphological and molecular data.

  6. Modelling retention and dispersion mechanisms of bluefin tuna eggs and larvae in the northwest Mediterranean Sea

    Science.gov (United States)

    Mariani, Patrizio; MacKenzie, Brian R.; Iudicone, Daniele; Bozec, Alexandra

    2010-07-01

    Knowledge of early life history of most fish species in the Mediterranean Sea is sparse and processes affecting their recruitment are poorly understood. This is particularly true for bluefin tuna, Thunnus thynnus, even though this species is one of the world’s most valued fish species. Here we develop, apply and validate an individually based coupled biological-physical oceanographic model of fish early life history in the Mediterranean Sea. We first validate the general structure of the coupled model with a 12-day Lagrangian drift study of anchovy ( Engraulis encrasicolus) larvae in the Catalan Sea. The model reproduced the drift and growth of anchovy larvae as they drifted along the Catalan coast and yielded similar patterns as those observed in the field. We then applied the model to investigate transport and retention processes affecting the spatial distribution of bluefin tuna eggs and larvae during 1999-2003, and we compared modelled distributions with available field data collected in 2001 and 2003. Modelled and field distributions generally coincided and were patchy at mesoscales (10s-100s km); larvae were most abundant in eddies and along frontal zones. We also identified probable locations of spawning bluefin tuna using hydrographic backtracking procedures; these locations were situated in a major salinity frontal zone and coincided with distributions of an electronically tagged bluefin tuna and commercial bluefin tuna fishing vessels. Moreover, we hypothesized that mesoscale processes are responsible for the aggregation and dispersion mechanisms in the area and showed that these processes were significantly correlated to atmospheric forcing processes over the NW Mediterranean Sea. Interannual variations in average summer air temperature can reduce the intensity of ocean mesoscale processes in the Balearic area and thus potentially affect bluefin tuna larvae. These modelling approaches can increase understanding of bluefin tuna recruitment processes and

  7. Precooking as a Control for Histamine Formation during the Processing of Tuna: An Industrial Process Validation.

    Science.gov (United States)

    Adams, Farzana; Nolte, Fred; Colton, James; De Beer, John; Weddig, Lisa

    2018-02-23

    An experiment to validate the precooking of tuna as a control for histamine formation was carried out at a commercial tuna factory in Fiji. Albacore tuna ( Thunnus alalunga) were brought on board long-line catcher vessels alive, immediately chilled but never frozen, and delivered to an on-shore facility within 3 to 13 days. These fish were then allowed to spoil at 25 to 30°C for 21 to 25 h to induce high levels of histamine (>50 ppm), as a simulation of "worst-case" postharvest conditions, and subsequently frozen. These spoiled fish later were thawed normally and then precooked at a commercial tuna processing facility to a target maximum core temperature of 60°C. These tuna were then held at ambient temperatures of 19 to 37°C for up to 30 h, and samples were collected every 6 h for histamine analysis. After precooking, no further histamine formation was observed for 12 to 18 h, indicating that a conservative minimum core temperature of 60°C pauses subsequent histamine formation for 12 to 18 h. Using the maximum core temperature of 60°C provided a challenge study to validate a recommended minimum core temperature of 60°C, and 12 to 18 h was sufficient to convert precooked tuna into frozen loins or canned tuna. This industrial-scale process validation study provides support at a high confidence level for the preventive histamine control associated with precooking. This study was conducted with tuna deliberately allowed to spoil to induce high concentrations of histamine and histamine-forming capacity and to fail standard organoleptic evaluations, and the critical limits for precooking were validated. Thus, these limits can be used in a hazard analysis critical control point plan in which precooking is identified as a critical control point.

  8. Global trophic ecology of yellowfin, bigeye, and albacore tunas: Understanding predation on micronekton communities at ocean-basin scales

    Science.gov (United States)

    Duffy, Leanne M.; Kuhnert, Petra M.; Pethybridge, Heidi R.; Young, Jock W.; Olson, Robert J.; Logan, John M.; Goñi, Nicolas; Romanov, Evgeny; Allain, Valerie; Staudinger, Michelle D.; Abecassis, Melanie; Choy, C. Anela; Hobday, Alistair J.; Simier, Monique; Galván-Magaña, Felipe; Potier, Michel; Ménard, Frederic

    2017-06-01

    Predator-prey interactions for three commercially valuable tuna species: yellowfin (Thunnus albacares), bigeye (T. obesus), and albacore (T. alalunga), collected over a 40-year period from the Pacific, Indian, and Atlantic Oceans, were used to quantitatively assess broad, macro-scale trophic patterns in pelagic ecosystems. Analysis of over 14,000 tuna stomachs, using a modified classification tree approach, revealed for the first time the global expanse of pelagic predatory fish diet and global patterns of micronekton diversity. Ommastrephid squids were consistently one of the top prey groups by weight across all tuna species and in most ocean bodies. Interspecific differences in prey were apparent, with epipelagic scombrid and mesopelagic paralepidid fishes globally important for yellowfin and bigeye tunas, respectively, while vertically-migrating euphausiid crustaceans were important for albacore tuna in the Atlantic and Pacific Oceans. Diet diversity showed global and regional patterns among tuna species. In the central and western Pacific Ocean, characterized by low productivity, a high diversity of micronekton prey was detected while low prey diversity was evident in highly productive coastal waters where upwelling occurs. Spatial patterns of diet diversity were most variable in yellowfin and bigeye tunas while a latitudinal diversity gradient was observed with lower diversity in temperate regions for albacore tuna. Sea-surface temperature was a reasonable predictor of the diets of yellowfin and bigeye tunas, whereas chlorophyll-a was the best environmental predictor of albacore diet. These results suggest that the ongoing expansion of warmer, less productive waters in the world's oceans may alter foraging opportunities for tunas due to regional changes in prey abundances and compositions.

  9. Evolutionary changes of multiple visual pigment genes in the complete genome of Pacific bluefin tuna.

    Science.gov (United States)

    Nakamura, Yoji; Mori, Kazuki; Saitoh, Kenji; Oshima, Kenshiro; Mekuchi, Miyuki; Sugaya, Takuma; Shigenobu, Yuya; Ojima, Nobuhiko; Muta, Shigeru; Fujiwara, Atushi; Yasuike, Motoshige; Oohara, Ichiro; Hirakawa, Hideki; Chowdhury, Vishwajit Sur; Kobayashi, Takanori; Nakajima, Kazuhiro; Sano, Motohiko; Wada, Tokio; Tashiro, Kosuke; Ikeo, Kazuho; Hattori, Masahira; Kuhara, Satoru; Gojobori, Takashi; Inouye, Kiyoshi

    2013-07-02

    Tunas are migratory fishes in offshore habitats and top predators with unique features. Despite their ecological importance and high market values, the open-ocean lifestyle of tuna, in which effective sensing systems such as color vision are required for capture of prey, has been poorly understood. To elucidate the genetic and evolutionary basis of optic adaptation of tuna, we determined the genome sequence of the Pacific bluefin tuna (Thunnus orientalis), using next-generation sequencing technology. A total of 26,433 protein-coding genes were predicted from 16,802 assembled scaffolds. From these, we identified five common fish visual pigment genes: red-sensitive (middle/long-wavelength sensitive; M/LWS), UV-sensitive (short-wavelength sensitive 1; SWS1), blue-sensitive (SWS2), rhodopsin (RH1), and green-sensitive (RH2) opsin genes. Sequence comparison revealed that tuna's RH1 gene has an amino acid substitution that causes a short-wave shift in the absorption spectrum (i.e., blue shift). Pacific bluefin tuna has at least five RH2 paralogs, the most among studied fishes; four of the proteins encoded may be tuned to blue light at the amino acid level. Moreover, phylogenetic analysis suggested that gene conversions have occurred in each of the SWS2 and RH2 loci in a short period. Thus, Pacific bluefin tuna has undergone evolutionary changes in three genes (RH1, RH2, and SWS2), which may have contributed to detecting blue-green contrast and measuring the distance to prey in the blue-pelagic ocean. These findings provide basic information on behavioral traits of predatory fish and, thereby, could help to improve the technology to culture such fish in captivity for resource management.

  10. The imprint of anthropogenic CO2 emissions on Atlantic bluefin tuna otoliths

    Science.gov (United States)

    Fraile, Igaratza; Arrizabalaga, Haritz; Groeneveld, Jeroen; Kölling, Martin; Santos, Miguel Neves; Macías, David; Addis, Piero; Dettman, David L.; Karakulak, Saadet; Deguara, Simeon; Rooker, Jay R.

    2016-06-01

    Otoliths of Atlantic bluefin tuna (Thunnus thynnus) collected from the Mediterranean Sea and North Atlantic Ocean were analyzed to evaluate changes in the seawater isotopic composition over time. We report an annual otolith δ13C record that documents the magnitude of the δ13C depletion in the Mediterranean Sea between 1989 and 2010. Atlantic bluefin tuna in our sample (n = 632) ranged from 1 to 22 years, and otolith material corresponding to the first year of life (back-calculated birth year) was used to reconstruct seawater isotopic composition. Otolith δ18O remained relatively stable between 1989 and 2010, whereas a statistically significant decrease in δ13C was detected across the time interval investigated, with a rate of decline of 0.05‰ yr- 1 (- 0.94‰ depletion throughout the recorded period). The depletion in otolith δ13C over time was associated with the oceanic uptake of anthropogenically derived CO2.

  11. Relative growth pattern and hard tissue of vertebral centra by microradiography of bluefin tuna

    International Nuclear Information System (INIS)

    Kubo, Y.; Asano, H.

    1989-01-01

    To clarify the growth feature and the structure of hard tissue, we studied the vertebral centrum of three species, bluefin tuna Thunnus thynnus, bigeye tuna T. obesus and skipjack Katsuwonus pelamis (BL: 44.2, 39.5 and 40.0cm respectively). We examined the ratio of cetrum length to diameter in each vertebral centrum and obtained the value of 0.9-1.3 in most centra among three species. This indicates that the examined species belong to the equivalent type of the relative growth pattern of vertebral centra. The hard tissue was observed by microradiography, with the longitudinal and cross sections (about 100 μm) cut through the center of notochordal pore. The major centra of the vertebral column were composed of characteristic simple structure like a cross, when seen in the microradiographs of cross sections. Microradiographs indicated that the bone has complicated canals with minute spaces like the bone cavities

  12. Abundance and Distribution Patterns of Thunnus albacares in Isla del Coco National Park through Predictive Habitat Suitability Models.

    Directory of Open Access Journals (Sweden)

    Cristina Gonzáles-Andrés

    Full Text Available Information on the distribution and habitat preferences of ecologically and commercially important species is essential for their management and protection. This is especially important as climate change, pollution, and overfishing change the structure and functioning of pelagic ecosystems. In this study, we used Bayesian hierarchical spatial-temporal models to map the Essential Fish Habitats of the Yellowfin tuna (Thunnus albacares in the waters around Isla del Coco National Park, Pacific Costa Rica, based on independent underwater observations from 1993 to 2013. We assessed if observed changes in the distribution and abundance of this species are related with habitat characteristics, fishing intensity or more extreme climatic events, including the El Niño Southern Oscillation, and changes on the average sea surface temperature. Yellowfin tuna showed a decreasing abundance trend in the sampled period, whereas higher abundances were found in shallow and warmer waters, with high concentration of chlorophyll-a, and in surrounding seamounts. In addition, El Niño Southern Oscillation events did not seem to affect Yellowfin tuna distribution and abundance. Understanding the habitat preferences of this species, using approaches as the one developed here, may help design integrated programs for more efficient management of vulnerable species.

  13. Effect of tuna skin gelatin-based coating enriched with seaweed extracts on the quality of tuna fillets during storage at 4 °C

    Directory of Open Access Journals (Sweden)

    Milene Vala

    2017-10-01

    Full Text Available Nowadays, consumers demand high quality food products with an extended shelf-life without chemical additives. Edible coatings (EC containing natural compounds are a promising preservation technology for raw seafood without compromising fresh-like appeal and nutritional content.The aim of this work was to evaluate the effect of Thunnus obesus skin gelatin-based EC containing Codium spp. or Fucus vesiculosus extracts on raw tuna preservation. Three gelatin-based EC (gelatin (5 % + glycerol (25 %; gelatin (5 % + Codium spp. (1 % + glycerol (25 %; gelatin (5 % + Fucus vesiculosus (1 % + glycerol (25 % were applied directly on the surface of tuna fillets. Functional properties of gelatin and gelatin-based EC containing seaweed extracts were also studied. The gelatin was extracted by an acid-swelling process in the presence/absence of pepsin, followed by subsequent heating/refrigeration, after a pre-treatment with NaOH. The type of acid, temperature and concentration of NaOH greatly influence the process yield. The higher extraction yield was achieved using acetic acid in the presence of pepsin by subsequent refrigeration, especially when skins were previously treated with NaOH (0.2 M. Tuna quality was assessed over 12 days of storage at 4 ± 1 °C in terms of chemical and microbial indices. Results showed that tuna skin gelatin-based EC avoids tuna deterioration. Microbial growth, assessed by total viable counts, and total volatile basic nitrogen were maintained below the maximum limits recommended, contrarily to the control. Additionally, the use of EC increased the stability of red colour during storage. 

  14. Characterization of Emergent Data Networks Among Long-Tail Data

    Science.gov (United States)

    Elag, Mostafa; Kumar, Praveen; Hedstrom, Margaret; Myers, James; Plale, Beth; Marini, Luigi; McDonald, Robert

    2014-05-01

    Data curation underpins data-driven scientific advancements. It manages the information flux across multiple users throughout data life cycle as well as increases data sustainability and reusability. The exponential growth in data production spanning across the Earth Science involving individual and small research groups, which is termed as log-tail data, increases the data-knowledge latency among related domains. It has become clear that an advanced framework-agnostic metadata and ontologies for long-tail data is required to increase their visibility to each other, and provide concise and meaningful descriptions that reveal their connectivity. Despite the advancement that has been achieved by various sophisticated data management models in different Earth Science disciplines, it is not always straightforward to derive relationships among long-tail data. Semantic data clustering algorithms and pre-defined logic rules that are oriented toward prediction of possible data relationships, is one method to address these challenges. Our work advances the connectivity of related long-tail data by introducing the design for an ontology-based knowledge management system. In this work, we present the system architecture, its components, and illustrate how it can be used to scrutinize the connectivity among datasets. To demonstrate the capabilities of this "data network" prototype, we implemented this approach within the Sustainable Environment Actionable Data (SEAD) environment, an open-source semantic content repository that provides a RDF database for long-tail data, and show how emergent relationships among datasets can be identified.

  15. The Real maccoyii: Identifying Tuna Sushi with DNA Barcodes – Contrasting Characteristic Attributes and Genetic Distances

    Science.gov (United States)

    Lowenstein, Jacob H.; Amato, George; Kolokotronis, Sergios-Orestis

    2009-01-01

    Background The use of DNA barcodes for the identification of described species is one of the least controversial and most promising applications of barcoding. There is no consensus, however, as to what constitutes an appropriate identification standard and most barcoding efforts simply attempt to pair a query sequence with reference sequences and deem identification successful if it falls within the bounds of some pre-established cutoffs using genetic distance. Since the Renaissance, however, most biological classification schemes have relied on the use of diagnostic characters to identify and place species. Methodology/Principal Findings Here we developed a cytochrome c oxidase subunit I character-based key for the identification of all tuna species of the genus Thunnus, and compared its performance with distance-based measures for identification of 68 samples of tuna sushi purchased from 31 restaurants in Manhattan (New York City) and Denver, Colorado. Both the character-based key and GenBank BLAST successfully identified 100% of the tuna samples, while the Barcode of Life Database (BOLD) as well as genetic distance thresholds, and neighbor-joining phylogenetic tree building performed poorly in terms of species identification. A piece of tuna sushi has the potential to be an endangered species, a fraud, or a health hazard. All three of these cases were uncovered in this study. Nineteen restaurant establishments were unable to clarify or misrepresented what species they sold. Five out of nine samples sold as a variant of “white tuna” were not albacore (T. alalunga), but escolar (Lepidocybium flavorunneum), a gempylid species banned for sale in Italy and Japan due to health concerns. Nineteen samples were northern bluefin tuna (T. thynnus) or the critically endangered southern bluefin tuna (T. maccoyii), though nine restaurants that sold these species did not state these species on their menus. Conclusions/Significance The Convention on International Trade

  16. Mitochondrial DNA analysis reveals three stocks of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in Indian waters

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar; Menezes, M.R.; Meena, R.M.

    was sequenced and analysed for 321 yellowfin samples. Hierarchical analysis of molecular variance showed significant genetic differentiation among three groups (VE); (AG); (KO, TU, PO, VI, PB) analyzed (Theta sub(ST)=0.03844, P less than or equal to 0...

  17. [Fatty acid variation in yellowfin tuna, spotted weakfish and Florida pompano when submitted to six cooking techniques].

    Science.gov (United States)

    Castro-González, María Isabel; Maafs-Rodríguez, Ana Gabriela; Romo Pérez-Gil, Fernando

    2013-03-01

    The aim of the present study was to analyze the effect of six cooking techniques (steamed, foiled, foiled with banana leaf, baked, microwave-cooked and light frying) in the fatty acid content of Thunnus albacore (yellowfin tuna), Cynoscionnebulosus (spotted weakfish) and Trachinotuscarolinus (Florida pompano). After cooking the fish fillets, fatty acid analyses were performed using gas chromatography. Total lipids increased in all cooking techniques in tunaand spotted weakfish. Saturated fatty acids of tuna and spotted weakfish increased in three cooking techniques, while in Florida pompano only gas oven raised their content. Lightly frying generated the highest content of n-3 in tuna and spotted weakfish, and the lowest in Florida pompano, specie that presented less variation. In tuna fish, the most recommended cooking techniques are foiled with aluminum and microwave oven; for spotted weakfish, foiled with banana leaf; while Florida pompano can be prepared using all cooking methods except gas oven. This information is useful to enrich data from chemical composition tables, in which concentrations are usually presented in raw food.

  18. Preliminary forecasts of Pacific bigeye tuna population trends under the A2 IPCC scenario

    Science.gov (United States)

    Lehodey, P.; Senina, I.; Sibert, J.; Bopp, L.; Calmettes, B.; Hampton, J.; Murtugudde, R.

    2010-07-01

    An improved version of the spatial ecosystem and population dynamics model SEAPODYM was used to investigate the potential impacts of global warming on tuna populations. The model included an enhanced definition of habitat indices, movements, and accessibility of tuna predators to different vertically migrant and non-migrant micronekton functional groups. The simulations covered the Pacific basin (model domain) at a 2° × 2° geographic resolution. The structure of the model allows an evaluation from multiple data sources, and parameterization can be optimized by adjoint techniques and maximum likelihood using fishing data. A first such optimized parameterization was obtained for bigeye tuna ( Thunnus obesus) in the Pacific Ocean using historical catch data for the last 50 years and a hindcast from a coupled physical-biogeochemical model driven by the NCEP atmospheric reanalysis. The parameterization provided very plausible biological parameter values and a good fit to fishing data from the different fisheries, both within and outside the time period used for optimization. We then employed this model to forecast the future of bigeye tuna populations in the Pacific Ocean. The simulation was driven by the physical-biogeochemical fields predicted from a global marine biogeochemistry - climate simulation. This global simulation was performed with the IPSL climate model version 4 (IPSL-CM4) coupled to the oceanic biogeochemical model PISCES and forced by atmospheric CO 2, from historical records over 1860-2000, and under the SRES A2 IPCC scenario for the 21st century (i.e. atmospheric CO 2 concentration reaching 850 ppm in the year 2100). Potential future changes in distribution and abundance under the IPCC scenario are presented but without taking into account any fishing effort. The simulation showed an improvement in bigeye tuna spawning habitat both in subtropical latitudes and in the eastern tropical Pacific (ETP) where the surface temperature becomes optimal for

  19. Food-web inferences of stable isotope spatial patterns in copepods and yellowfin tuna in the pelagic eastern Pacific Ocean

    Science.gov (United States)

    Olson, Robert J.; Popp, Brian N.; Graham, Brittany S.; López-Ibarra, Gladis A.; Galván-Magaña, Felipe; Lennert-Cody, Cleridy E.; Bocanegra-Castillo, Noemi; Wallsgrove, Natalie J.; Gier, Elizabeth; Alatorre-Ramírez, Vanessa; Ballance, Lisa T.; Fry, Brian

    2010-07-01

    Evaluating the impacts of climate and fishing on oceanic ecosystems requires an improved understanding of the trophodynamics of pelagic food webs. Our approach was to examine broad-scale spatial relationships among the stable N isotope values of copepods and yellowfin tuna ( Thunnus albacares), and to quantify yellowfin tuna trophic status in the food web based on stable-isotope and stomach-contents analyses. Using a generalized additive model fitted to abundance-weighted-average δ 15N values of several omnivorous copepod species, we examined isotopic spatial relationships among yellowfin tuna and copepods. We found a broad-scale, uniform gradient in δ 15N values of copepods increasing from south to north in a region encompassing the eastern Pacific warm pool and parts of several current systems. Over the same region, a similar trend was observed for the δ 15N values in the white muscle of yellowfin tuna caught by the purse-seine fishery, implying limited movement behavior. Assuming the omnivorous copepods represent a proxy for the δ 15N values at the base of the food web, the isotopic difference between these two taxa, “ ΔYFT-COP,” was interpreted as a trophic-position offset. Yellowfin tuna trophic-position estimates based on their bulk δ 15N values were not significantly different than independent estimates based on stomach contents, but are sensitive to errors in the trophic enrichment factor and the trophic position of copepods. An apparent inshore-offshore, east to west gradient in yellowfin tuna trophic position was corroborated using compound-specific isotope analysis of amino acids conducted on a subset of samples. The gradient was not explained by the distribution of yellowfin tuna of different sizes, by seasonal variability at the base of the food web, or by known ambit distances (i.e. movements). Yellowfin tuna stomach contents did not show a regular inshore-offshore gradient in trophic position during 2003-2005, but the trophic

  20. The Southern Oscillation, Hypoxia, and the Eastern Pacific Tuna Fishery

    Science.gov (United States)

    Webster, D.; Kiefer, D.; Lam, C. H.; Harrison, D. P.; Armstrong, E. M.; Hinton, M.; Luo, L.

    2012-12-01

    The Eastern Pacific tuna fishery, which is one of the world's major fisheries, covers thousands of square kilometers. The vessels of this fishery are registered in more than 30 nations and largely target bigeye (Thunnus obesus), skipjack (Katsuwonus pelamis), and yellowfin (T. albacores) tuna. In both the Pelagic Habitat Analysis Module project, which is sponsored by NASA, and the Fishscape project, which is sponsored by NSF, we have attempted to define the habitat of the three species by matching a 50 year time series on fish catch and effort with oceanographic information obtained from satellite imagery and from a global circulation model. The fishery time series, which was provided by the Inter-American Tropical Tuna Commission, provided spatial maps of catch and effort at monthly time steps; the satellite imagery of the region consisted of sea surface temperature, chlorophyll, and height from GHRSST, SEAWiFS, and AVISO products, and the modeled flow field at selected depths was output from ECCO-92 simulations from 1992 to present. All information was integrated and analyzed within the EASy marine geographic information system. This GIS will also provides a home for the Fishscape spatial simulation model of the coupled dynamics of the ocean, fish, fleets, and markets. This model will then be applied to an assessment of the potential ecological and economic impacts of climate change, technological advances in fleet operations, and increases in fuel costs. We have determined by application of EOF analysis that the ECCO-2 simulation of sea surface height fits well with that of AVISO imagery; thus, if driven properly by predictions of future air-sea exchange, the model should provide good estimates of circulation patterns. We have also found that strong El Nino events lead to strong recruitment of all three species and strong La Nina events lead to weak recruitment. Finally, we have found that the general spatial distribution of the Eastern Pacific fishing grounds

  1. Governance innovation networks for sustainable tuna

    NARCIS (Netherlands)

    Miller, A.M.M.

    2014-01-01

    Governance Innovation Networks for Sustainable Tuna

    Alice M.M. Miller

    Tuna fisheries are among the most highly capitalised and valuable fisheries in the world and their exploitation will continue for the foreseeable future. This means the sustainability of tuna

  2. Inland-strayed Long-tailed Skua Stercorarius longicaudus victim of Goshawk Accipiter gentilis

    NARCIS (Netherlands)

    Kranenbarg, S.

    1997-01-01

    Long-tailed Jaeger Stercorarius longicaudus Northern Goshawk Accipiter gentilis Pluckings of a juvenile Long-tailed Skua Stercorarius longicaudus were found near Wekerom (52?06'N, 5?42'E), Netherlands, some 80 km inland, on 2 and 6 October 1996. The two pluckings, about 150 m apart, consisted of

  3. A reconstructed database of historic bluefin tuna captures in the Gibraltar Strait and Western Mediterranean

    Directory of Open Access Journals (Sweden)

    Josué M. Polanco-Martínez

    2018-02-01

    Full Text Available This data paper presents a reconstruction of a compilation of a small but consistent database of historical capture records of bluefin tuna (Thunnus thynnus; BFT hereafter from the Gibraltar Strait and Western Mediterranean (Portugal, Spain and Italy. The compilation come from diverse historical and documentary sources and span the time interval from 1525 to 1936 covering a period of 412 years. There is a total of 3074 datum, which reach up to 67.83% of the total implying a 32.17% of missing data. However, we have only reconstructed the captures for the time interval 1700–1936 and we provide these reconstructions only for this time interval and for 9 out of 11 series due to the scarcity and inhomogeneity of the two oldest capture time series. This reconstructed database provides an invaluable opportunity for fisheries and marine research as well as for multidisciplinary research in climate change. Keywords: Data reconstructions, DINEOF, Missing data, Historic Bluefin tuna captures, Gibraltar Strait and Western Mediterranean

  4. ESTIMATION OF YELLOWFIN TUNA PRODUCTION LANDED IN BENOA PORT WITH WEIGHT-WEIGHT, LENGTH-WEIGHT RELATIONSHIPS AND CONDITION FACTOR APPROACHES

    Directory of Open Access Journals (Sweden)

    Irwan Jatmiko

    2017-01-01

    Full Text Available Yellowfin tuna (Thunnus albacares is one of the important catch for the fishing industry in Indonesia. Length-weight relationship study is one of important tools to support fisheries management. However it could not be done to yellowfin tuna landed in Benoa port since they are in the form of gilled-gutted condition. The objectives of this study are to determine the relationship between gilled-gutted weight (GW and whole weight (WW, to calculate length weight relationship between fork length (FL and estimated whole weight (WW and to assess the relative condition factor (Kn of yellowfin tuna in Eastern Indian Ocean. Data were collected from three landing sites i.e. Malang, East Java; Benoa, Bali and Kupang, East Nusa Tenggara from January 2013 to February 2014. Linear regression analysis applied to test the significance baseline between weight-weight relationships and log transformed length weight relationship. Relative condition factor (Kn used to identify fish condition among length groups and months. The results showed a significant positive linear relationships between whole weight (WW and gilled-gutted weight (GW of T. albacares (p<0.001. There was a significant positive linier relationships between log transformed fork length and log transformed whole weight of T. albacares (p<0.001. Relative condition factor (Kn showed declining pattern along with length increase and varied among months. The findings from this study provide data for management of yellowfin tuna stock and population.

  5. Tuna and dolphin associations in the North-east Atlantic: Evidence of different ecological niches from stable isotope and heavy metal measurements

    International Nuclear Information System (INIS)

    Das, K.; Lepoint, G.; Loizeau, V.; Debacker, V.; Dauby, P.; Bouquegneau, J.M.

    2000-01-01

    Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotope ( 13 C/ 12 C and 15 N/ 14 N) analyses were performed in three predator species from the North-east Atlantic: the striped dolphin, Stenella coeruleoalba, the common dolphin Delphinus delphis and the albacore tuna, Thunnus alalunga, and compared to their previously described stomach content. Heavy metals (Cd, Zn, Cu and Fe) are mainly transferred through the diet and so, have been determined in the tissues of the animals. Tuna muscles display higher δ 15 N than in common and striped dolphins (mean: 11.4 vs. 10.3%o and 10.4%o, respectively) which reflects their higher trophic level nutrition. Higher δ 13 C are found in common (-18.4%o) and striped dolphin (-18.1%o) muscles than in albacore tuna (-19.3%o) probably in relation with its migratory pattern. The most striking feature is the presence of two levels of cadmium concentrations in the livers of the tunas (32 mg kg -1 dry weight (DW) vs. 5 mg kg -1 DW). These two groups also differ by their iron concentrations and their δ 15 N and δ 13 C liver values. These results suggest that in the Biscay Bay, tunas occupy two different ecological niches probably based on different squid inputs in their diet

  6. A continuous time delay-difference type model (CTDDM) applied to stock assessment of the southern Atlantic albacore Thunnus alalunga

    Institute of Scientific and Technical Information of China (English)

    LIAO Baochao; LIU Qun; ZHANG Kui; Abdul BASET; Aamir Mahmood MEMON; Khadim Hussain MEMON; HAN Yanan

    2016-01-01

    A continuous time delay-difference model (CTDDM) has been established that considers continuous time delays of biological processes.The southern Atlantic albacore (Thunnus alalunga) stock is the one of the commercially important tuna population in the marine world.The age structured production model (ASPM) and the surplus production model (SPM) have already been used to assess the albacore stock.However,the ASPM requires detailed biological information and the SPM lacks the biological realism.In this study,we focus on applying a CTDDM to the southern Atlantic albacore (T.alalunga) species,which provides an alternative method to assess this fishery.It is the first time that CTDDM has been provided for assessing the Atlantic albacore (T.alalunga) fishery.CTDDM obtained the 80% confidence interval of MSY (maximum sustainable yield) of(21510 t,23118 t).The catch in 2011 (24100 t) is higher than the MSY values and the relative fishing mortality ratio (F2011/FMSY) is higher than 1.0.The results of CTDDM were analyzed to verify the proposed methodology and provide reference information for the sustainable management of the southern Atlantic albacore stock.The CTDDM treats the recruitment,the growth,and the mortality rates as all varying continuously over time and fills gaps between ASPM and SPM in this stock assessment.

  7. Relationships between tuna catch and variable frequency oceanographic conditions

    Directory of Open Access Journals (Sweden)

    F. I. Ormaza-González

    2016-08-01

    Full Text Available Skipjack (Katsuwunus pelamis, yellow fin (Thunnus albacares and albacore (Thunnus alulunga tunas landed in the Eastern Pacific Ocean (EPO countries and Ecuador were correlated to the Indexes Oceanic El Niño (ONI and Multivariate Enso Index (MEI. The temporal series 1983–2012, and 1977–1999 (warm Pacific Decadal Oscillation, PDO, and 2000–2012 (cold PDO were analyzed. Linear correlation showed that at least 11 % of the total landings were associated with the MEI, with a slightly negative gradient from cold to warm conditions. When non-linear regression (n  =  6, the R2 was higher up to 0.304 (MEI, r =  0.551. The correlation shows high spread from −0.5 to +0.5 for both MEI/ONI; the highest landings occurred at 0.34–0.45; both indexes suggested that at extreme values < −1.0 and > 1.1 total landings tend to decrease. Landings were associated up to 21.9 % (MEI in 2000–2012, 1983–1999 rendered lower R2 (< 0.09; i.e., during cold PDO periods there was a higher association between landings and oceanographic conditions. For the non-linear regression (n  =  6 a R2 of 0.374 (MEI and 0.408 (ONI were registered, for the 2000–2012, a higher R2 was observed in 1983–1999, 0.443 and 0.711 for MEI and ONI respectively, suggesting that is better to analyze split series (1983–1999, 2000–2012 than as a whole (1983–2012, due to noise produced by the transition from hot to cold PDOs. The highest landings were in the range −0.2 to 0.5 for MEI/ONI. The linear regression of skipjack landings in Ecuador gave an R2 of 0.140 (MEI and 0.066 (ONI and the non-linear were 0.440 and 0.183 respectively. Total landings in the EPO associated to oceanographic events of high and low frequencies could be used somehow as predictors of the high El Niño o La Niña. There is a clear evidence that tuna fish biomass are at higher levels when the PDO is on cold phase (2000–2030 and vice versa on warm phase (1980–1999. The

  8. Value Chain Model Development of Tuna and Tuna Alike In Indonesia

    Directory of Open Access Journals (Sweden)

    Ateng Supriatna

    2014-11-01

    Full Text Available Sustainability of tuna and tuna alike fisheries depend on chain value system formed by stakeholders ranging from product fishing, processing/diversification, distribution, and marketing. The objective of this research was to create chain value system model of tuna and tuna alike fisheries, to predict the interaction pattern of stakeholders and to formulate the precise strategy to minimize the synergy resistance of chain value system development strategy of tuna and tuna alike fisheries. Structural Equation Modelling (SEM was applied to analyze the chain value model. The stakeholders/the players of tuna and tuna alike fisheries basically have positive interaction (CE>0.The negative interaction occured on retailers and consumers. Interaction of retailers with consumers is significant (p<0.05 0.01. Interaction pattern of fishermen, retailers, collectors, and exporters affected significantlly by pricing and the level of role played by the stakeholders. The strategy to minimize the sinergy resistance of chain value system development are respectivelly the strategy of involving the group of fishermen on products pricing (CE= 1,176 and P= 0,000, the strategy of involving the seller groups on products pricing (CE-PE=1,08, CE-PB= 0,766, CE EKS= 2,028 AND P= 0,000, and the strategy on guaranteeing flexible interaction between retailer and consumers (CE= 0,179 and p = 0,01.Keywords: tuna and tuna alike, interaction, tuna and tuna alike stakeholders, and value chain

  9. Mapping Risks of Indonesian Tuna Supply Chain

    Science.gov (United States)

    Karningsih, P. D.; Anggrahini, D.; Kurniati, N.; Suef, M.; Fachrur, A. R.; Syahroni, N.

    2018-04-01

    Due to its high economic value and is produced by many countries, Tuna is considered as one of the world’s popular fish. Demand for Tuna species are very high and it usually sells in three form: fresh, frozen or canned. Competition in Tuna trading is challengin with the potential risk of price and supply fluctuations. With recent focus of Indonesia government that see the future of Indonesia civilization depend on the oceans and as the three biggest Tuna producing country, Ministry of Marine Affairs and Fisheries should ensure sustainability and competitiveness of Indonesian tuna. Therefore, there is a great need to develop a proper and effective strategy to manage potential risks in Indonesian Tuna supply chain. This paper is aimed at identifying and mapping potential Tuna supply chain risks and its interrelationships that would assist government in determining proper strategies to manage Indonesian Tuna. A framework for identifying Tuna supply chain risks is proposed. Generic risk structure of Supply Chain Risk Identification System is adopted and modified to match with particular object, which is Indonesian Tuna. The proposed model consists of hierarchical and causal structure that encompass potential risks of Tuna supply chain operations from fishing, trading, processing and distribution. The causal structure consist of risk events and its risk agents which is the cause of risk events. To ensure the root cause of risk events are identified properly, five why’s analysis is utilized to obtain risk agents. This proposed model also captures risk interrelationship between internal and external environment of Tuna supply chain. Preliminary result of this study identifies 15 risk events and 13 risk factors on fishing and trading operations and maps their interrelationships.

  10. Thawing of Frozen Tuna Meat

    Science.gov (United States)

    Tanaka, Takeo; Nishiwaki, Kôji; Kakuda, Kitonari; Tomimatsu, Takao

    Frozen southern bluefin tuna meat discolors easily and sometimes contracts when thawed caused by thaw rigor. These phenomenon often become problematic in the transaction or handling of this kind of frozen tuna. Frozen meat blocks of southern Bluefin tuna were thawed separately by air thawing, running water thawing and microwave thawing. Changes occurring during thawing were checked for meat color by met-myoglobin ratio determination and for contract by microscopic observation. Results are as follows : (1) Discoloration scarcely occurred in the process of running water thawing (at 10°C for 50 min, or at 0°C for 6 hr). (2) No contraction was observed during thawing with running water described above and air thawing (at 18-20°C for 6 hr). (3) Discoloration and contraction seemed to be minimized, as to latently contractile blocks, when meat temperature passed through rapidly between -10°C and -5°C, and slowly (for 5-6 hr) between -5°C and -1°C. When the block was originally not contractile, discloration was minimized by rising meat temperature rapidly from -10°C to -l°C.

  11. UTILITY OF FISHERY HIGH SCHOOL DATA IN EXAMINING SPATIAL AND TEMPORAL CATCH AND EFFORT TRENDS IN THE INDONESIAN LONGLINE TUNA FISHERY

    Directory of Open Access Journals (Sweden)

    Lilis Sadiyah

    2015-12-01

    Full Text Available One of the endeavours to address the shortage of catch per unit effort (CPUE information from the Indonesian Indian Ocean tuna fishery is the collation of a large amount of catch and effort data collected by Indonesian Fisheries High School students (“FHS data”. This paper attempts to investigate spatial-temporal patterns of catch and effort of the FHS data for the main tuna species caught by the fishery: bigeye tuna (Thunnus obesus - BET, yellowfin tuna (T. albacares - YFT, albacore (T. alalunga - ALB and southern bluefin tuna (T.maccoyii - SBT. Reported sets occurred in the Eastern Indian Ocean, north and south of 20°S. Recorded effort from the FHS data set was concentrated within the only known SBT spawning ground. However, within this data set, SBT were recorded in the lowest catch proportion relative to BET, YFT and ALB. The catch composition data suggested that YFT and ALB were predominantly targeted by the fishery, with ALB and SBT most predominantly recorded south of 20°S, whereas BET and YFT were mostly recorded north of 20°S. Unfortunately, there was no strong information on targeting practices reported by this data set, limiting any attempts to understand the factors that influenced those results. As the sampling predominantly occurred in between July and December, the data are not representative of fishing activities throughout the entire year, and any seasonal patterns from the FHS data set are biased. In addition, the FHS data set is prone to observation error and uncertainty in terms of fish identification and fishing location. Therefore, the FHS data set needs to be interpreted with caution.

  12. Mercury in fish products: what's the best for consumers between bluefin tuna and yellowfin tuna?

    Science.gov (United States)

    Cammilleri, Gaetano; Vazzana, Mirella; Arizza, Vincenzo; Giunta, Francesca; Vella, Antonio; Lo Dico, Gianluigi; Giaccone, Vita; Giofrè, Salvatore V; Giangrosso, Giuseppe; Cicero, Nicola; Ferrantelli, Vincenzo

    2018-02-01

    A total of 205 bluefin and yellowfin tuna samples were examined for mercury detection in order to verify possible differences and have a detailed risk assessment of the two tuna species. The results showed significant higher mercury concentration in muscle tissue of bluefin tuna respect yellowfin tuna (p < 0.001) with mean concentration of 0.84 mg/kg and maximum value of 1.94 mg/kg. These differences can be due the different biological and ecological aspects of the two tuna species and to different oceanographic aspects between Atlantic Ocean and Mediterranean sea. The results obtained in this study suggest an advisable containment of the sources of pollution and further studies on the closed-loop farming of bluefin tuna, in order to ensure the product safety.

  13. Global habitat preferences of commercially valuable tuna

    KAUST Repository

    Arrizabalaga, Haritz; Dufour, Florence; Kell, Laurence T.; Merino, Gorka; Ibaibarriaga, Leire; Chust, Guillem; Irigoien, Xabier; Santiago, Josu; Murua, Hilario; Fraile, Igaratza; Chifflet, Marina; Goikoetxea, Nerea; Sagarminaga, Yolanda; Aumont, Olivier; Bopp, Laurent; Herrera, Miguel Angel; Marc Fromentin, Jean; Bonhomeau, Sylvain

    2015-01-01

    In spite of its pivotal role in future implementations of the Ecosystem Approach to Fisheries Management, current knowledge about tuna habitat preferences remains fragmented and heterogeneous, because it relies mainly on regional or local studies that have used a variety of approaches making them difficult to combine. Therefore in this study we analyse data from six tuna species in the Pacific, Atlantic and Indian Oceans in order to provide a global, comparative perspective of habitat preferences. These data are longline catch per unit effort from 1958 to 2007 for albacore, Atlantic bluefin, southern bluefin, bigeye, yellowfin and skipjack tunas. Both quotient analysis and Generalised Additive Models were used to determine habitat preference with respect to eight biotic and abiotic variables. Results confirmed that, compared to temperate tunas, tropical tunas prefer warm, anoxic, stratified waters. Atlantic and southern bluefin tuna prefer higher concentrations of chlorophyll than the rest. The two species also tolerate most extreme sea surface height anomalies and highest mixed layer depths. In general, Atlantic bluefin tuna tolerates the widest range of environmental conditions. An assessment of the most important variables determining fish habitat is also provided. © 2014 Elsevier Ltd.

  14. Global habitat preferences of commercially valuable tuna

    KAUST Repository

    Arrizabalaga, Haritz

    2015-03-01

    In spite of its pivotal role in future implementations of the Ecosystem Approach to Fisheries Management, current knowledge about tuna habitat preferences remains fragmented and heterogeneous, because it relies mainly on regional or local studies that have used a variety of approaches making them difficult to combine. Therefore in this study we analyse data from six tuna species in the Pacific, Atlantic and Indian Oceans in order to provide a global, comparative perspective of habitat preferences. These data are longline catch per unit effort from 1958 to 2007 for albacore, Atlantic bluefin, southern bluefin, bigeye, yellowfin and skipjack tunas. Both quotient analysis and Generalised Additive Models were used to determine habitat preference with respect to eight biotic and abiotic variables. Results confirmed that, compared to temperate tunas, tropical tunas prefer warm, anoxic, stratified waters. Atlantic and southern bluefin tuna prefer higher concentrations of chlorophyll than the rest. The two species also tolerate most extreme sea surface height anomalies and highest mixed layer depths. In general, Atlantic bluefin tuna tolerates the widest range of environmental conditions. An assessment of the most important variables determining fish habitat is also provided. © 2014 Elsevier Ltd.

  15. Trade-Based Estimation of Bluefin Tuna Catches in the Eastern Atlantic and Mediterranean, 2005–2011

    Science.gov (United States)

    Gagern, Antonius; van den Bergh, Jeroen; Sumaila, Ussif Rashid

    2013-01-01

    The Eastern Atlantic and Mediterranean stock of Bluefin tuna Thunnus thynnus (BFTE) has long been considered overfished and at risk of collapse. Although ICCAT quotas for this stock have decreased considerably over the past years, uncertainty exists about the degree of catch beyond this quota. The extent of such catch is an important piece of information in stock assessment models as well as being an indicator of the effectiveness of fisheries management. We present a model using Bluefin tuna trade data to infer actual catches. Basing our calculations on 25 countries involved in BFTE trade, we estimate that between 2005 and 2011, allowable quotas were exceeded by 44 percent. This gap between catch and quotas has slightly increased over past years, leading to estimated excess catches of 57 percent for the period between 2008 and 2011. To improve assessments, preparation and design of BFTE management, we suggest that the estimated total removals reported in this paper be included in stock assessment models for BFTE. An implication of our findings is that ICCAT member states should take stronger measures to monitor and enforce compliance with quotas. PMID:23922870

  16. Phylogenetic and pathogenic characterization of novel adenoviruses from long-tailed ducks (Clangula hyemalis)

    Science.gov (United States)

    Counihan, Katrina; Skerratt, Lee; Franson, J. Christian; Hollmen, Tuula E.

    2015-01-01

    Novel adenoviruses were isolated from a long-tailed duck (Clangula hyemalis) mortality event near Prudhoe Bay, Alaska in 2000. The long-tailed duck adenovirus genome was approximately 27 kb. A 907 bp hexon gene segment was used to design primers specific for the long-tailed duck adenovirus. Nineteen isolates were phylogenetically characterized based on portions of their hexon gene and 12 were most closely related to Goose adenovirus A. The remaining 7 shared no hexon sequences with any known adenoviruses. Experimental infections of mallards with a long-tailed duck reference adenovirus caused mild lymphoid infiltration of the intestine and paint brush hemorrhages of the mucosa and dilation of the intestine. This study shows novel adenoviruses from long-tailed ducks are diverse and provides further evidence that they should be considered in cases of morbidity and mortality in sea ducks. Conserved and specific primers have been developed that will help screen sea ducks for adenoviral infections.

  17. Keterpaduan Pasar Tuna Segar Benoa/Bali, Indonesia Dan Pasar Sentral Tuna Tokyo, Jepang

    OpenAIRE

    SITORUS, EDYANTO

    2007-01-01

    Tuna fish is which forming life and horde in tropical territorial water until subtropics. Tuna type which important in commerce is Yellowfin, Bigeye, Poor Southern Bluefin, Northern Bluefin, Albacore and of Skipjack (Cakalang). Objective of this research is analyze integrity of market that happened between local market (Market of Benoa, Bali) with reference market (Tuna Central Market of Tokyo, Japan), It is seen from the research that in Benoa there are 3 system of selling fresh tu...

  18. Histamine development and bacterial diversity in microbially-challenged tonggol (Thunnus tonggol) under temperature abuse during canning manufacture.

    Science.gov (United States)

    Hongpattarakere, Tipparat; Buntin, Nirunya; Nuylert, Aem

    2016-01-01

    Histamine formation and bacteriological changes caused by temperature abuse commonly occurring in the manufacturing process of standard canned tuna was assessed in microbiologically challenged tonggol (Thunnus tonggol). The in situ challenge was performed by water-soaking at 26-28 °C for 7 h to ensure the multiplication and active phase of fish microflora. Right after pre-cooking to back-bone temperature (BBT) of 50-52 °C, histamine dropped to 5.17 ± 2.71 ppm, and slowly reached 6.84 ± 1.69 ppm at 16 h abuse. On the contrary, histamine was reduced to 2.87 ± 1.23 ppm and eventually reached 5.01 ± 1.32 ppm at 24 h abuse in the pre-cooked fish previously frozen. The numbers of total aerobic bacteria, Enterobactericeae, psychrotroph, histamine forming bacteria (HFB) and diversity of fish microflora were revealed by cultural and nested PCR-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) techniques. Interestingly, frozen storage effectively halted histamine formation in raw fish throughout 16 h abuse despite the presence of HFB. These included the prolific strains of Morganella morganii, Proteus penneri, Proteus mirabilin, Citrobacter spp. The nested PCR-DGGE profile confirmed the presence of M. morganii and Citrobacter spp. in raw fish. These prolific strains were hardly observed in the precooked fish previously frozen. Frozen storage did not only promote even histamine distribution throughout fish muscle but also enhanced histamine loss during thawing and pre-cooking. Therefore, pre-cooking and frozen storage were proven to be the effective combined hurdles not only to reduce but also prolong histamine formation of the challenged toggol throughout 24 h of temperature abuse during canning process.

  19. Global integration of European tuna markets

    Science.gov (United States)

    Jiménez-Toribio, Ramòn; Guillotreau, Patrice; Mongruel, Rémi

    2010-07-01

    This paper evaluates the degree of integration between the world market and the major European marketplaces of frozen and canned tuna through both vertical and horizontal price relationships. Spatial linkages are investigated horizontally in order to estimate the connection between the European market and the world-wide market on the primary stage of the value chain. One of the key results is the high level of market integration at the ex-vessel stage, and the price leadership of yellowfin tuna over skipjack tuna. The same approach is applied at the ex-factory level. Basically, the European market for final goods appears to be segmented between the Northern countries consuming low-priced canned skipjack tuna imported from Asia (mainly Thailand) and the Southern countries (Italy, Spain) processing and importing yellowfin-based products sold at higher prices. France appears to be an intermediate market where both products are consumed. The former market is found to be well integrated to the world market and can be considered to be competitive, but there is a suspicion of market power being exercised on the latter. Price relationships are therefore tested vertically between the price of frozen tuna paid by the canneries and the price of canned fish in both Italy and France. The two species show an opposite pattern in prices transmission along the value chain: price changes along the chain are far better transmitted for the “global” skipjack tuna than for the more “European” yellowfin tuna. The results are discussed, along with their implications for the fishing industry.

  20. Developmental stages of fish blood flukes, Cardicola forsteri and Cardicola opisthorchis (Trematoda: Aporocotylidae), in their polychaete intermediate hosts collected at Pacific bluefin tuna culture sites in Japan.

    Science.gov (United States)

    Ogawa, Kazuo; Shirakashi, Sho; Tani, Kazuki; Shin, Sang Phil; Ishimaru, Katsuya; Honryo, Tomoki; Sugihara, Yukitaka; Uchida, Hiro'omi

    2017-02-01

    Farming of Pacific bluefin tuna (PBT), Thunnus orientalis, is a rapidly growing industry in Japan. Aporocotylid blood flukes of the genus Cardicola comprising C. orientalis, C. opisthorchis and C. forsteri are parasites of economic importance for PBT farming. Recently, terebellid polychaetes have been identified as the intermediate hosts for all these parasites. We collected infected polychaetes, Terebella sp., the intermediate host of C. opisthorchis, from ropes and floats attached to tuna cages in Tsushima, Nagasaki Prefecture, Japan. Also, Neoamphitrite vigintipes (formerly as Amphitrite sp. sensu Shirakashi et al., 2016), the intermediate host of C. forsteri, were collected from culture cages in Kushimoto, Wakayama Prefecture, Japan. The terebellid intermediate hosts harbored the sporocysts and cercariae in their body cavity. Developmental stages of these blood flukes were molecularly identified using species specific PCR primers. In this paper, we describe the cercaria and sporocyst stages of C. opisthorchis and C. forsteri and compare their morphological characteristics among three Cardicola blood flukes infecting PBT. We also discuss phylogenetic relations of the six genera of the terebellid intermediate hosts (Artacama, Lanassa, Longicarpus, Terebella, Nicolea and Neoamphitrite) of blood flukes infecting marine fishes, based on their morphological characters. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  1. [Otolith microchemistry of tuna species: research progress].

    Science.gov (United States)

    Zhu, Guo-ping

    2011-08-01

    Microchemistry analysis of trace elements and isotopes in fishes' calcified substances is an emerging approach to analyze the population structure, life history, and migration environmental history of fishes. With the increasing improvement of the researches and applications of otolith microchemistry, this approach has been a good tool for studying the ecology of tuna species. Currently, the research contents of tuna species' otolith microchemistry mainly include trace elements and isotopes, and the former is the emphasis and hotspot in applied research, playing a vital role in the researches of population partitioning, natal origin, migration environmental history, and life history of tuna species, especially bluefin tuna. However, most of the researches are focusing on the variation of otolith's Sr/Ca ratio, and there is no final conclusion on the relationships between the fractionation of isotopes C and O in otolith and the temperature. For the sake of exploiting the huge value of otolith microchemistry, it would be necessary to strengthen the researches on the deposition mechanisms of trace elements in otolith, and to analyze the spatio-temporal variations of various trace elements in otolith by comprehensive research methods.

  2. 21 CFR 161.190 - Canned tuna.

    Science.gov (United States)

    2010-04-01

    .... (a) Identity. (1) Canned tuna is the food consisting of processed flesh of fish of the species... deemed to be safe if it is not a food additive as defined in section 201(s) of the Federal Food, Drug, and Cosmetic Act (the act), or if it is a food additive as so defined, it is used in conformity with...

  3. Pathological manifestation of the Acanthocephalus dirus in Thunnus albacares

    Directory of Open Access Journals (Sweden)

    Alagarsamy Sakthivel

    2016-05-01

    Full Text Available Objective: To describe the pathological manifestation of the Acanthocephalus dirus (A. dirus infestation in Thunnus albacares (T. albacares from southeast coast of India. Methods: The parasite-infested fishes were collected from Nagapattinam landing centre of Tamil Nadu from southeast coast of India. The Acanthocephala morphology, gross pathology, histopathology and histochemistry were investigated. Results: T. albacares were severely infested with A. dirus, the group of Acanthocephala attached to the posterior region of the intestine. The adult worm proboscis was cylindrical and the length and width ranging between 2.7–6.4 mm and 0.8–1.3 mm, respectively. Histopathologically, the infested intestinal mucosal epithelium, stratum granulosum, lamina propria, muscular and serosa layers were highly degraded. The lesions were infiltrating with basophil-like inflammatory cells. The parasite-affected lesions were histochemically positive for alcian blue, azo dye, toluidine blue and oil red O. Conclusions: This is the new host for the parasite A. dirus in T. albacares. On the basis of histological and histochemical findings, the lesions were highly damaged due to the parasitic infestation. The high density of the parasite and severe penetration of the proboscis into the intestinal tissues are the main reason for the pathogenicity in the host.

  4. No costly prosociality among related long-tailed macaques (Macaca fascicularis).

    Science.gov (United States)

    Sterck, Elisabeth H M; Olesen, Caroline U; Massen, Jorg J M

    2015-08-01

    Altruism, benefiting another at a cost to the donor, may be achieved through prosocial behavior. Studies of nonhuman animals typically investigate prosocial behavior with paradigms in which the donor can choose to give a recipient a food item, and the choice does not affect the donor's reward (which is either present or absent). In such tasks, long-tailed macaques (Macaca fascicularis) show prosocial behavior, especially toward kin. Here, we tested captive long-tailed macaques with related recipients in an alternative task, in which the donor had to give up a preferred reward to benefit the recipient; that is, they had to choose a lower valued reward for themselves to provide food to their kin. Overall, the macaques did not provide their kin with food. The task forced the donor to balance its prosocial behavior with its selfish choice for a higher value reward, a balance that turned out to favor selfish motives. Consequently, our study shows that a prosocial tendency is not sufficient to elicit costly prosocial behavior in long-tailed macaques. Subsequently, we feel that tasks in which the donor must choose a lower value reward to benefit another individual may allow the titration of the strength of prosocial behavior, and thus provides interesting possibilities for future comparative studies. (c) 2015 APA, all rights reserved).

  5. Using stable isotopes of albacore tuna and predictive models to characterize bioregions and examine ecological change in the SW Pacific Ocean

    Science.gov (United States)

    Pethybridge, Heidi R.; Young, Jock W.; Kuhnert, Petra M.; Farley, Jessica H.

    2015-05-01

    Broad-scale food web inferences of 534 albacore tuna, Thunnus alalunga, in the south-west Pacific Ocean in 2009 and 2010 were made using bulk nitrogen (δ15N) and carbon (δ13C) stable isotopes. Condition was also examined for the same fish using C:N ratios. A Generalized Additive Modeling (GAM) approach was used to analyze spatio-temporal, biological and environmental drivers that impact the distribution of tuna isotopes and to create oceanographic maps. Based on model formulations, five bioregions with distinct isotopic signatures were identified and were related to known biological, nutrient cycling and oceanographic (temperature, primary productivity and eddy) features associated with the East Australian Current. δ15N values showed a large-scale, uniform latitudinal gradient decreasing from the south to north, in a region encompassing oligotrophic waters in the Coral Sea. In contrast, δ13C values were lower in the nutrient rich Tasman Sea waters and offshore East Australia. C:N ratios suggested that albacore occupying southern and offshore waters were in better condition. Ontogenetic trends in all three biochemical parameters were identified and related to differences in size distribution. Regional-specific temporal variations were detected including similar monthly changes for both isotopes and significantly less enriched δ13C (by 1.9‰) than in previous work undertaken in 2006, potentially signifying a substantial shift in the carbon cycle that supports food webs off central east Australia. Our results showed that isotopic measurements in tuna and the GAM framework provide powerful tools to assess ecosystem functioning and change by linking sources of nutrients and organic matter to local food web assembly. Such knowledge is vital to support an ecosystem based approach to fisheries management including biogeochemical whole-of-ecosystem models and monitoring programs at regional and landscape-scales.

  6. Report of Didymocystis wedli Ariola, 1902 (Digenea; Didymozoidae from Thunnus albacares in Brazil

    Directory of Open Access Journals (Sweden)

    A Kohn

    2001-10-01

    Full Text Available Didymocystis wedli a parasite from the gills of Thunnus albacares from the coast of the State of Rio de Janeiro, is described by use of light and scanning electron microscopy. This is the first report of this species in Brazil and South America. New data are presented on the surface topography as demonstrated by scanning electron microscopy.

  7. Depressed resilience of bluefin tuna in the western atlantic and age truncation.

    Science.gov (United States)

    Secor, D H; Rooker, J R; Gahagan, B I; Siskey, M R; Wingate, R W

    2015-04-01

    Following intense overfishing in the 1970s, the western stock of Atlantic bluefin tuna (Thunnus thynnus) experienced a long period of depressed abundance, which has been attributed to failure of the population to periodically produce large numbers of juveniles, the western stock mixing with the more highly exploited eastern stock (fisheries in the Northeast Atlantic Ocean and Mediterranean Sea), and regime shift in the population's ecosystem resulting in lower replacement rates. To evaluate the presence of relatively strong years of juvenile production, we analyzed age structure from a recent sample of otoliths (ear stones) collected from the western stock (2011-2013, North Carolina, U.S.A., winter fishery). Mixing levels for the recent sample were analyzed using otolith stable isotopes to test whether age structure might be biased through immigration of eastern stock bluefin tuna. Age structure from historical samples collected from United States and Canadian fisheries (1975-1981) was compared with more recent samples (1996-2007) to examine whether demographic changes had occurred to the western stock that might have disrupted juvenile production. Relatively high juvenile production occurred in 2003, 2005, and 2006. Otolith stable isotope analysis showed that these recruitments were mostly of western stock origin. However, these high recruitments were >2-fold less than historical recruitment. We found substantial age truncation in the sampled fisheries. Half the historical sample was >20 years old (mean age = 20.1 [SD 3.7]; skewness = -0.3), whereas 20 years old (mean age = 13.4 [SD 3.8]; skewness = 1.3). Loss of age structure is consistent with changes in fishing selectivity and trends in the stock assessment used for management. We propose that fishing, as a forcing variable, brought about a threshold shift in the western stock toward lower biomass and production, a shift that emulates the regime shift hypothesis. An abbreviated reproductive life span

  8. PCR detection and identification of histamine-forming bacteria in filleted tuna fish samples.

    Science.gov (United States)

    Ferrario, Chiara; Pegollo, Chiara; Ricci, Giovanni; Borgo, Francesca; Fortina, M Grazia

    2012-02-01

    Total of 14 filleted yellowfin tuna fish (Thunnus albacares) sold in wholesale fish market and supermarkets in Milan, Italy, were purchased and tested to determine microbial count, histamine level, histamine-forming bacteria, and their ability to produce histamine in culture broth. Although histamine level was less than 10 ppm, many samples showed high total viable bacterial and enterobacterial counts that reached dangerous levels after temperature abuse for short periods of time. A PCR assay targeting a 709-bp fragment of the histidine decarboxylase gene (hdc) revealed that 30.5% of the 141 enteric bacteria isolated from samples were positive and potentially able to produce histamine. The hdc positive strains were mainly isolated from fish bought at wholesale fish market, where we observed several possible risk factors, such as handling in poor and non-refrigerated conditions during fillet preparation. These positive strains were identified as Citrobacter koseri/Enterobacter spp. and Morganella morganii, by 16S/23S rRNA internal transcribed spacer amplification and 16S rRNA sequence analysis. The strains showed a variable ability of histamine production, with Morganella morganii being the most active histamine-producing species. A direct DNA extraction from fish and a PCR targeting the hdc gene showed a high degree of concordance with the results obtained through microbiological and chemical analyses, and could aid in the prompt detection of potentially contaminated fish products, before histamine accumulates. The use of methods for the early and rapid detection of bacteria producing biogenic amines is important for preventing accumulation of these toxic substances in food products. In this study, we used a molecular approach for the detection of histamine-forming bacteria in fish. PCR-based methods require expensive equipment and a high degree of training for the user, but are fast (marketing and can be used in the investigation of risk reduction strategies.

  9. Modificaciones en la grasa del atún blanco (Thunnus alalunga debidas a la fabricación y almacenamiento de su conserva

    Directory of Open Access Journals (Sweden)

    Navarro, María P.

    1991-06-01

    Full Text Available Modifications in fatty acid composition in white tuna (Thunnus alalunga ocurring at each stage of the cannig process, boiling and sterilization in soybean oil, were studied. Boiling was performed in brine and two sterilization times (55 and 90 minutes as well as the effects of storage for one year were tested. Boiling had no effect on fatty acid composition or the n-3/n-6 ratio. However canned tuna absorbed soybean oil during sterilization, causing an increase of the percentage of C18:1, C18:2 and C18:3 and a decrease in C20:5 and C22:6. Therefore, unsaturated fatty acids to saturated fatty acids (PS/S ratio changed and the n-3/n-6 ratio declined from 7.03 to 0.59 compared with raw tuna. Due to the whole fat enrichment, canned fish showed a slight loss of PUFA (C20:5 and C22:6 and a increase of C18:1, C18:2 and C18:3. The latter effect was more marked in the preserves as a consequence of one year storage. The convenience of using for cannig an oil containing a lower amount of polyunsaturated fatty acid in order to remain the original n-3/n-6 ratio of the raw tuna is discussed.Se estudiaron los cambios que se producen en la grasa del atún blanco en cada una de las etapas que intervienen en el proceso de fabricación y almacenamiento de su conserva: cocción en salmuera y esterilización practicada en aceite de soja. Se estudiaron dos tiempos diferentes de esterilización (55 y 90 minutos y el almacenamiento por espacio de 1 año. La cocción en salmuera no afectó a la composición en ácidos grasos de los lípidos del pescado ni a la relación n-3/n-6. Sin embargo, durante la esterilización, el atún absorbió el aceite utilizado como cobertura, lo que produjo un aumento porcentual en el nivel de C18:1, C18:2, C18:3 y una disminución en C20:5 y C22:6. La relación ácidos grasos insaturados a saturados (PS/S cambió y la n-3/n-6 disminuyó desde 7,03 a 0,59 comparado con atún crudo. En el pescado en conserva, debido al enriquecimiento total

  10. Addition of different tuna meal levels to pizza dough

    Directory of Open Access Journals (Sweden)

    Daniel Abreu Vasconcelos Campelo

    Full Text Available Abstract The aim of this study was to develop pizza dough with different levels of tuna meal (Tunnus spp.. In order to produce tuna meal, tuna torsos without fins were used, cooked for 1 hour, pressed, milled and dehydrated for 24 hours at 60 °C. Pizza dough was produced without (0% or with the addition of 5, 10, 15 and 20% of tuna meal, calculated based on the quantity of wheat flour. The tuna meal and different pizza pastries were analyzed for moisture content, crude protein, total lipids, ash, carbohydrates, caloric value and fatty acid profiles. Microbiological and sensory analyses were also carried out on the pizza pastries. The increasing addition of tuna meal resulted in gains in the crude protein (10.89 to 18.94%, total lipid (4.63 to 5.89% and ash (2.54 to 3.54% contents of the pizza pastries, not influencing the moisture content or caloric value. The inclusion of tuna meal linearly increased the quantity of n-3 series fatty acids in the pizza pastry, from 1.56 to 5.93 g/kg with the addition of 20% tuna meal. The ratio between the polyunsaturated and saturated fatty acids in the tuna meal and pizza pastries varied from 1.21 to 1.85. The microbiological analyses showed that the pizza pastries were produced under proper hygiene conditions. It was also observed that the addition of 5 to 20% of tuna meal to the pizza pastry did not significantly (p>0.05 alter the parameters of aroma, flavor, overall impression and purchase intention. It was therefore concluded that the addition of 5 to 20% tuna meal is effective in improving the nutritional value and fatty acid profile of pizza pastry.

  11. KEBIJAKAN PENGELOLAAN HASIL TANGKAPAN SAMPINGAN TUNA LONGLINE DI SAMUDERA HINDIA

    Directory of Open Access Journals (Sweden)

    Budi Nugraha

    2013-11-01

    Full Text Available Tuna longline atau rawai tuna merupakan salah satu alat tangkap yang sangat efektif untuk menangkap tuna. Selain efektif alat tangkap ini juga merupakan alat tangkap yang selektif terhadap hasil tangkapannya. Namun demikian, alat tangkap ini masih menimbulkan suatu masalah dimana ikan hasil tangkapan yang diperoleh tidak semuanya merupakan hasil tangkapan utama (target species, ada sebagian yang merupakan hasil tangkapan sampingan (by-catch. Sebagian besar hasil tangkapan sampingan tuna longline memiliki nilai ekonomis, hanya jenis pari lumpur dan ikan naga yang tidak memiliki nilai ekonomis. Namun demikian, justru yang tidak memiliki nilai ekonomis mendominasi hasil tangkapan sampingan pada perikanan tuna longline. Oleh karena itu perlu adanya tindak lanjut dengan menyusun peraturan atau regulasi yang terkait dengan pengelolaan ikan hasil tangkapan sampingan dan pengelolaan yang benar terhadap hasil tangkapan tersebut beserta habitatnya agar terjaga kelestarian sumberdayanya dan juga tetap menjadi sumber pendapatan masyarakat.Tulisan ini membahas secara ringkas tentang isu hasil tangkapan sampingan pada perikanan tuna longline, komposisi jenisnya, pemanfaatannya dan kebijakannya. Tuna longline is one of the most effective fishing gears to catch tuna. In addition, this fishing gear is selective to catch tuna. However, this gear is still causing a problem where some species other than their target species were caught as by-catch. Most of by-catch species from the tuna longliners have an economic value, except pelagic stingrays and lancetfish. In fact, these by-catch species (non economical-valued species dominated the longline catch. Therefore, it is needed to develop rules or regulations related to the management of the fish by-products, and properly manage the fishing activities on these by-catch species and habitat preservation to preserve its resources and also remain as a source of income. This paper briefly discusses the issue of by

  12. Connecting long-tail scientists with big data centers using SaaS

    Science.gov (United States)

    Percivall, G. S.; Bermudez, L. E.

    2012-12-01

    Big data centers and long tail scientists represent two extremes in the geoscience research community. Interoperability and inter-use based on software-as-a-service (SaaS) increases access to big data holdings by this underserved community of scientists. Large, institutional data centers have long been recognized as vital resources in the geoscience community. Permanent data archiving and dissemination centers provide "access to the data and (are) a critical source of people who have experience in the use of the data and can provide advice and counsel for new applications." [NRC] The "long-tail of science" is the geoscience researchers that work separate from institutional data centers [Heidorn]. Long-tail scientists need to be efficient consumers of data from large, institutional data centers. Discussions in NSF EarthCube capture the challenges: "Like the vast majority of NSF-funded researchers, Alice (a long-tail scientist) works with limited resources. In the absence of suitable expertise and infrastructure, the apparently simple task that she assigns to her graduate student becomes an information discovery and management nightmare. Downloading and transforming datasets takes weeks." [Foster, et.al.] The long-tail metaphor points to methods to bridge the gap, i.e., the Web. A decade ago, OGC began building a geospatial information space using open, web standards for geoprocessing [ORM]. Recently, [Foster, et.al.] accurately observed that "by adopting, adapting, and applying semantic web and SaaS technologies, we can make the use of geoscience data as easy and convenient as consumption of online media." SaaS places web services into Cloud Computing. SaaS for geospatial is emerging rapidly building on the first-generation geospatial web, e.g., OGC Web Coverage Service [WCS] and the Data Access Protocol [DAP]. Several recent examples show progress in applying SaaS to geosciences: - NASA's Earth Data Coherent Web has a goal to improve science user experience using

  13. Selenium concentrations and enzyme activities of glutathione metabolism in wild long-tailed ducks and common eiders

    Science.gov (United States)

    Franson, J. Christian; Hoffman, David J.; Flint, Paul L.

    2011-01-01

    The relationships of selenium (Se) concentrations in whole blood with plasma activities of total glutathione peroxidase, Se-dependent glutathione peroxidase, and glutathione reductase were studied in long-tailed ducks (Clangula hyemalis) and common eiders (Somateria mollissima) sampled along the Beaufort Sea coast of Alaska, USA. Blood Se concentrations were >8 μg/g wet weight in both species. Linear regression revealed that the activities of total and Se-dependent glutathione peroxidase were significantly related to Se concentrations only in long-tailed ducks, raising the possibility that these birds were experiencing early oxidative stress.

  14. Mercury in canned tuna: white versus light and temporal variation

    International Nuclear Information System (INIS)

    Burger, Joanna; Gochfeld, Michael

    2004-01-01

    There are abundant data and advisories for mercury levels in wild fish, but far fewer for commercial fish that compose a large majority of the fish most people eat. Until recently, relatively little attention has been devoted to examining mercury in canned tuna, despite its great importance in human diets. There is substantial media coverage of the benefits and risk from fish consumption, but few peer-reviewed data on canned tuna, the most commonly consumed fish in the United States. In this paper, we examine the levels of total mercury in canned tuna obtained from a New Jersey grocery store from 1998 to 2003, looking for temporal consistency within this data set and particularly for comparison with the Food and Drug Administration's 1991 study. We analyzed 168 cans individually for total mercury. All values are reported as parts per million (=μg/g) on a wet weight basis. In a subset of samples analyzed for total and inorganic mercury, the inorganic mercury was below detection levels; hence at least 89% of the mercury can be considered methylmercury. We found that white-style tuna had significantly more total mercury (mean 0.407 ppm) than light-style tuna (mean 0.118 ppm), presumably reflecting that 'white' tuna is albacore, a species relatively larger than the skipjack tuna, which is commonly available as 'light' or 'chunk light'. The maximum mercury in a can was 0.997 ppm, but 25% of white tuna samples exceeded 0.5 ppm. Data suggest a slight increase in levels since 1991, and mercury levels were significantly higher in 2001 than in other years. The mean level of mercury in white tuna (mean 0.407 ppm) was significantly higher than the mean value of 0.17 ppm currently used by the U.S. Food and Drug Administration (FDA) in its risk assessment and public information. There were no significant differences in mercury levels in tuna packed in oil compared to water. Draining contents had no effect on mercury levels, and the fluid, both oil and water, contained little

  15. 76 FR 13583 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries...

    Science.gov (United States)

    2011-03-14

    ... address concerns raised in a recent decision by a NOAA Administrative Law Judge (see Atlantic Tunas Transfer at Sea section for case reference). NMFS has prepared a draft Environmental Assessment (EA... subtraction of these allocations directly from the TAC, the recommendation allocates the remainder to the UK...

  16. Bioenergetics, Trophic Ecology, and Niche Separation of Tunas.

    Science.gov (United States)

    Olson, R J; Young, J W; Ménard, F; Potier, M; Allain, V; Goñi, N; Logan, J M; Galván-Magaña, F

    Tunas are highly specialized predators that have evolved numerous adaptations for a lifestyle that requires large amounts of energy consumption. Here we review our understanding of the bioenergetics and feeding dynamics of tunas on a global scale, with an emphasis on yellowfin, bigeye, skipjack, albacore, and Atlantic bluefin tunas. Food consumption balances bioenergetics expenditures for respiration, growth (including gonad production), specific dynamic action, egestion, and excretion. Tunas feed across the micronekton and some large zooplankton. Some tunas appear to time their life history to take advantage of ephemeral aggregations of crustacean, fish, and molluscan prey. Ontogenetic and spatial diet differences are substantial, and significant interdecadal changes in prey composition have been observed. Diet shifts from larger to smaller prey taxa highlight ecosystem-wide changes in prey availability and diversity and provide implications for changing bioenergetics requirements into the future. Where tunas overlap, we show evidence of niche separation between them; resources are divided largely by differences in diet percentages and size ranges of prey taxa. The lack of long-term data limits the ability to predict impacts of climate change on tuna feeding behaviour. We note the need for systematic collection of feeding data as part of routine monitoring of these species, and we highlight the advantages of using biochemical techniques for broad-scale analyses of trophic relations. We support the continued development of ecosystem models, which all too often lack the regional-specific trophic data needed to adequately investigate climate and fishing impacts. © 2016 Elsevier Ltd. All rights reserved.

  17. Exploring future scenarios for the global supply chain of tuna

    Science.gov (United States)

    Mullon, C.; Guillotreau, P.; Galbraith, E. D.; Fortilus, J.; Chaboud, C.; Bopp, L.; Aumont, O.; Kaplan, D.

    2017-06-01

    The abundance of tuna, an important top predator that ranges throughout tropical and subtropical oceans, is now largely determined by fishing activity. Fishing activity, in turn, is determined by the interaction of fish availability, fishing capacity, fishing costs and global markets for tuna products. In the face of overfishing, the continued sustainable supply of tuna is likely to require improved global governance, that would benefit from modeling frameworks capable of integrating market forces with the availability of fish in order to consider alternative future projections. Here we describe such a modeling framework, in which we develop several simple, contrasting scenarios for the development of the tuna supply chain in order to illustrate the utility of the approach for global evaluation of management strategies for tuna and other complex, stock-structured fisheries. The model includes multiple national and multi-national fishing fleets, canneries and fresh/frozen markets, and connects these to global consumers using a network of flows. The model is calibrated using recent data on fish catch, cannery and fresh/frozen production, and consumption. Scenarios explore the control on future outcomes in the global tuna fishery by representing, in a simple way, the effects of (1) climate change, (2) changes in the global demand for tuna, and (3) changes in the access to fishing grounds (marine reserves). The results emphasize the potential importance of increasing demand in provoking a global collapse, and suggest that controlling tuna production by limiting technical efficiency is a potential countermeasure. Finally we discuss the outcomes in terms of potential extensions of the scenario approach allowed by this global network model of the tuna supply chain.

  18. Characterization of Fish Skin Gelatin Yellowfin Tuna

    Directory of Open Access Journals (Sweden)

    Mala Nurilmala

    2017-08-01

    Full Text Available Gelatin is one of the products which become a necessity for various industries, i.e. food and non-food industries. The application of gelatin has been increasing year by year in Indonesia. However, there is nogelatin industry in Indonesia so far. Thus, it is necessary to find an alternative source of gelatin, especially from fishery by products.Thus, the purpose of this research was to extract fish skin gelatin of yellowfin tuna with temperature treatments (55, 65 and 75oC. In addition, the properties of resulted gelatin were determined including yield, pH, gel strength, viscosity, functional groups, molecular weight profiles, and amino acid composition. The extraction at 75oC was chosen as the best result. The yield was 17%; pH 5.3; gel strength 1789.55 gf, viscosity 104.2 Cp, respectively. There was functional group amide A, I, II, dan III. SDS-PAGE showed β, α1 dan α2 bands for tuna skin gelatin. In addition, the main amino acids were glycine and proline.

  19. Tuna Cannery Points, Tutuila AS, 2007, US EPA Region 9

    Data.gov (United States)

    U.S. Environmental Protection Agency — American Samoa's primary industry is tuna processing by the Samoa Packing Co., user of the "Chicken of the Sea" label, and StarKist Samoa. Canneries thrive in this...

  20. Geo-Semantic Framework for Integrating Long-Tail Data and Model Resources for Advancing Earth System Science

    Science.gov (United States)

    Elag, M.; Kumar, P.

    2014-12-01

    Often, scientists and small research groups collect data, which target to address issues and have limited geographic or temporal range. A large number of such collections together constitute a large database that is of immense value to Earth Science studies. Complexity of integrating these data include heterogeneity in dimensions, coordinate systems, scales, variables, providers, users and contexts. They have been defined as long-tail data. Similarly, we use "long-tail models" to characterize a heterogeneous collection of models and/or modules developed for targeted problems by individuals and small groups, which together provide a large valuable collection. Complexity of integrating across these models include differing variable names and units for the same concept, model runs at different time steps and spatial resolution, use of differing naming and reference conventions, etc. Ability to "integrate long-tail models and data" will provide an opportunity for the interoperability and reusability of communities' resources, where not only models can be combined in a workflow, but each model will be able to discover and (re)use data in application specific context of space, time and questions. This capability is essential to represent, understand, predict, and manage heterogeneous and interconnected processes and activities by harnessing the complex, heterogeneous, and extensive set of distributed resources. Because of the staggering production rate of long-tail models and data resulting from the advances in computational, sensing, and information technologies, an important challenge arises: how can geoinformatics bring together these resources seamlessly, given the inherent complexity among model and data resources that span across various domains. We will present a semantic-based framework to support integration of "long-tail" models and data. This builds on existing technologies including: (i) SEAD (Sustainable Environmental Actionable Data) which supports curation

  1. Vulnerability of teleosts caught by the pelagic tuna longline fleets in South Atlantic and Western Indian Oceans

    Science.gov (United States)

    Lucena-Frédou, Flávia; Kell, Laurie; Frédou, Thierry; Gaertner, Daniel; Potier, Michel; Bach, Pascal; Travassos, Paulo; Hazin, Fábio; Ménard, Frédéric

    2017-06-01

    Productivity and Susceptibility Analysis (PSA) is a methodology for evaluating the vulnerability of a stock based on its biological productivity and susceptibility to fishing. In this study, we evaluated the vulnerability of 60 stocks of tuna, billfishes and other teleosts caught by the tuna longline fleets operating in the South Atlantic and Indian Ocean using a semi-quantitative PSA. We (a) evaluated the vulnerability of the species in the study areas; (b) compared the vulnerability of target and non-target species and oceans; (c) analyzed the sensitivity of data entry; and (d) compared the results of the PSA to other fully quantitative assessment methods. Istiophoridae exhibited the highest scores for vulnerability. The top 10 species at risk were: Atlantic Istiophorus albicans; Indian Ocean Istiompax indica; Atlantic Makaira nigricans and Thunnus alalunga; Indian Ocean Xiphias gladius; Atlantic T. albacares, Gempylus serpens, Ranzania laevis and X. gladius; and Indian Ocean T. alalunga. All species considered at high risk were targeted or were commercialized bycatch, except for the Atlantic G. serpens and R. laevis which were discarded, and may be considered as a false positive. Those species and others at high risk should be prioritized for further assessment and/or data collection. Most species at moderate risk were bycatch species kept for sale. Conversely, species classified at low risk were mostly discarded. Overall, species at high risk were overfished and/or subjected to overfishing. Moreover, all species considered to be within extinction risk (Critically Endangered, Endangered and Vulnerable) were in the high-risk category. The good concordance between approaches corroborates the results of our analysis. PSA is not a replacement for traditional stock assessments, where a stock is assessed at regular intervals to provide management advice. It is of importance, however, where there is uncertainty about catches and life history parameters, since it can

  2. Spatial Patterns and Temperature Predictions of Tuna Fatty Acids: Tracing Essential Nutrients and Changes in Primary Producers.

    Directory of Open Access Journals (Sweden)

    Heidi R Pethybridge

    Full Text Available Fatty acids are among the least understood nutrients in marine environments, despite their profile as key energy components of food webs and that they are essential to all life forms. Presented here is a novel approach to predict the spatial-temporal distributions of fatty acids in marine resources using generalized additive mixed models. Fatty acid tracers (FAT of key primary producers, nutritional condition indices and concentrations of two essential long-chain (≥C20 omega-3 fatty acids (EFA measured in muscle of albacore tuna, Thunnus alalunga, sampled in the south-west Pacific Ocean were response variables. Predictive variables were: location, time, sea surface temperature (SST and chlorophyll-a (Chla, and phytoplankton biomass at time of catch and curved fork length. The best model fit for all fatty acid parameters included fish length and SST. The first oceanographic contour maps of EFA and FAT (FATscapes were produced and demonstrated clear geographical gradients in the study region. Predicted changes in all fatty acid parameters reflected shifts in the size-structure of dominant primary producers. Model projections show that the supply and availability of EFA are likely to be negatively affected by increases in SST especially in temperate waters where a 12% reduction in both total fatty acid content and EFA proportions are predicted. Such changes will have large implications for the availability of energy and associated health benefits to high-order consumers. Results convey new concerns on impacts of projected climate change on fish-derived EFA in marine systems.

  3. [Effect of TSA and VPA treatment on long-tailed macaque (Macaca fascicularis)-pig interspecies somatic cell nuclear transfer].

    Science.gov (United States)

    Qin, Zu-Xing; Huang, Gao-Bo; Luo, Jun; Ning, Shu-Fang; Lu, Sheng-Sheng; Lu, Ke-Huan

    2012-03-01

    Long-tailed macaque-pig interspecies somatic cell nuclear transfer (iSCNT) is beneficial to yield embryonic stem cells from iSCNT embryos with similar genetic background as human, which can be used as materials for medical and basic research. The primary objective of this study was to investigate the effects of concentrations and treatment duration of two histone deacetylase inhibitors-Trichostatin A (TSA) and Valproic acid (VPA) and two different embryo culture media (PZM-3 and HECM-10) on the in vitro development of iSCNT embryos. The results suggested that when PZM-3 was used as the embryo culture medium, the blastocyst rate of 10 nmol/L TSA treatment for 48 h was significantly higher than the control group (22.78% vs 9.86%, PTSA treatment could enhance the in vitro developmental potential of long-tailed macaque-pig iSCNT embryos.

  4. Etiologi Penyebab Malformasi Tunas Ranting Kakao di Kulonprogo, DIY dan Segayung, Jawa Tengah

    Directory of Open Access Journals (Sweden)

    Susamto Somowiyarjo

    2014-12-01

    insektisida hasilnya tunas muda yang tumbuh berikutnya tidak menunjukan adanya gejala malformasi. Diduga bahwa malformasi pada tunas dan ranting tersebut disebabkan oleh racun yang ditularkan oleh serangga. Penelitian lebih lanjut untuk karakterisasi penyebab penyakit secara molekuler saat ini sedang dilakukan.

  5. Spatial genetic structure of Long-tailed Ducks (Clangula hyemalis) among Alaskan, Canadian, and Russian breeding populations

    Science.gov (United States)

    Wilson, Robert E.; Gust, J R; Petersen, Margaret; Talbot, Sandra L.

    2016-01-01

    Arctic ecosystems are changing at an unprecedented rate. How Arctic species are able to respond to such environmental change is partially dependent on the connections between local and broadly distributed populations. For species like the Long-tailed Duck (Clangula hyemalis), we have limited telemetry and band-recovery information from which to infer population structure and migratory connectivity; however, genetic analyses can offer additional insights. To examine population structure in the Long-tailed Duck, we characterized variation at mtDNA control region and microsatellite loci among four breeding areas in Alaska, Canada, and Russia. We observed significant differences in the variance of mtDNA haplotype frequencies between the Yukon-Kuskokwim Delta (YKD) and the three Arctic locations (Arctic Coastal Plain in Alaska, eastern Siberia, and central Canadian Arctic). However, like most sea duck genetic assessments, our study found no evidence of population structure based on autosomal microsatellite loci. Long-tailed Ducks use multiple wintering areas where pair formation occurs with some populations using both the Pacific and Atlantic Oceans. This situation provides a greater opportunity for admixture across breeding locales, which would likely homogenize the nuclear genome even in the presence of female philopatry. The observed mtDNA differentiation was largely due to the presence of two divergent clades: (A) a clade showing signs of admixture among all breeding locales and (B) a clade primarily composed of YKD samples. We hypothesize that the pattern of mtDNA differentiation reflects some degree of philopatry to the YKD and isolation of two refugial populations with subsequent expansion and admixture. We recommend additional genetic assessments throughout the circumpolar range of Long-tailed Ducks to further quantify aspects of genetic diversity and migratory connectivity in this species.

  6. Use of photogrammetry as a means to assess hybrids of rhesus (Macaca mulatta) and long-tailed (M. fascicularis) macaques.

    Science.gov (United States)

    Jadejaroen, Janya; Hamada, Yuzuru; Kawamoto, Yoshi; Malaivijitnond, Suchinda

    2015-01-01

    Rhesus (Macaca mulatta) and long-tailed (M. fascicularis) macaques are the most commonly used non-human primate models for biomedical research, but it is difficult to identify these two species in the hybrid zone (15-20°N). In this work, we used morphological values obtained via photogrammetry to assess hybrids of rhesus and long-tailed macaques at Khao Khieow Open Zoo (KKZ; 13°21'N, 101°06'E), eastern Thailand. Long-tailed and rhesus macaques have species-specific tail lengths and contrasts of their yellowish pelages. The accuracy and precision of the relative tail length (%RTL) and the contrast of the yellow hue (Cb*) of the pelage, as obtained from photographs, were compared with the corresponding direct measurements (morphometrics). The photogrammetric and morphometric measurements of %RTL and Cb* were highly significantly correlated (r = 0.989 and 0.980, p photogrammetry can be utilized to identify macaque species or hybrids when species identification relies mainly on tail length and pelage color.

  7. Habitat use and foraging patterns of molting male Long-tailed Ducks in lagoons of the central Beaufort Sea, Alaska

    Science.gov (United States)

    Flint, Paul L.; Reed, John; Deborah Lacroix,; Richard Lanctot,

    2016-01-01

    From mid-July through September, 10 000 to 30 000 Long-tailed Ducks (Clangula hyemalis) use the lagoon systems of the central Beaufort Sea for remigial molt. Little is known about their foraging behavior and patterns of habitat use during this flightless period. We used radio transmitters to track male Long-tailed Ducks through the molt period from 2000 to 2002 in three lagoons: one adjacent to industrial oil field development and activity and two in areas without industrial activity. We found that an index to time spent foraging generally increased through the molt period. Foraging, habitat use, and home range size showed similar patterns, but those patterns were highly variable among lagoons and across years. Even with continuous daylight during the study period, birds tended to use offshore areas during the day for feeding and roosted in protected nearshore waters at night. We suspect that variability in behaviors associated with foraging, habitat use, and home range size are likely influenced by availability of invertebrate prey. Proximity to oil field activity did not appear to affect foraging behaviors of molting Long-tailed Ducks.

  8. Genetic variation in Yellowfin Tuna Thunnus albacares (Bonnaterre, 1788) along Indian coast using PCR-RFLP analysis of mitochondrial DNA D–Loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Kunal, S.P.; GirishKumar; Menezes, M.R.

    stream_size 33493 stream_content_type text/plain stream_name Int_J_Scient_Res_3_25.pdf.txt stream_source_info Int_J_Scient_Res_3_25.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8 IJSR... - INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH 25 Volume : 3 | Issue : 1 | January 2014 • ISSN No 2277 - 8179 Research Paper Biology Swaraj Priyaranjan Kunal National Institute of Oceanography, Dona Paula, Goa 403004, India Girish Kumar National Institute...

  9. 50 CFR 216.95 - Official mark for “Dolphin-safe” tuna products.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Official mark for âDolphin-safeâ tuna... AND IMPORTING OF MARINE MAMMALS Dolphin Safe Tuna Labeling § 216.95 Official mark for “Dolphin-safe... Department of Commerce that may be used to label tuna products that meet the “dolphin-safe” standards set...

  10. Trophic impact of Atlantic bluefin tuna migrations in the North Sea

    DEFF Research Database (Denmark)

    Mariani, Patrizio; Andersen, Ken Haste; Lindegren, Martin

    2017-01-01

    and the stability of the fish community. The impact of a migrating top-predator is investigated here for Atlantic bluefin tuna in the North Sea. Bluefin tuna has been absent from the region for half-century, but recent years have seen recovery of migrations and a return of bluefin tuna in the area. We use a size...

  11. Feeding Partitioning among Tuna Taken in Surface and Mid-water ...

    African Journals Online (AJOL)

    Crustaceans were the almost exclusive food source of surface-swimming bigeye tuna, with the stomatopod (Natosquilla investigatoris) being the sole prey item recorded in this category. The diet of deep-swimming yellowfin tuna was balanced between epipelagic fish, crustaceans and cephalopods. Bigeye tuna fed ...

  12. Radiation hydrolysate of tuna cooking juice with enhanced antioxidant properties

    International Nuclear Information System (INIS)

    Choi, Jong-il; Sung, Nak-Yun; Lee, Ju-Woon

    2012-01-01

    Tuna protein hydrolysates are of increasing interest because of their potential application as a source of bioactive peptides. Large amounts of tuna cooking juice with proteins and extracts are produced during the process of tuna canning, and these cooking juice wastes cause environmental problems. Therefore, in this study, cooking juice proteins were hydrolyzed by irradiation for their utilization as functional additives. The degree of hydrolysis of tuna cooking juice protein increased from 0% to 15.1% at the absorbed doses of 50 kGy. To investigate the antioxidant activity of the hydrolysate, it was performed the ferric reducing antioxidant power (FRAP) assay, and the lipid peroxidation inhibitory and superoxide radical scavenging activities were measured. The FRAP values increased from 1470 μM to 1930 μM and IC 50 on superoxide anion was decreased from 3.91 μg/mL to 1.29 μg/mL at 50 kGy. All of the antioxidant activities were increased in the hydrolysate, suggesting that radiation hydrolysis, which is a simple process that does not require an additive catalysts or an inactivation step, is a promising method for food and environmental industries. - Highlights: ► Radiation was applied for the hydrolysis of tuna cooking juice protein. ► The degree of hydrolysis were increased by irradiation and the antioxidant activity of hydrolysate was higher than protein. ► This result suggest that radiation is useful method for the hydrolysis of protein.

  13. Development of functional canned and pouched tuna products added inulin for commercial production.

    Science.gov (United States)

    Rueangwatcharin, U; Wichienchot, S

    2015-08-01

    Four formulas of canned tuna in spring water and tuna in mayonnaise and pouched tuna in salad cream and tuna in thousand island cream with added inulin were developed for commercial production. The effects of the addition of a prebiotic (inulin, Orafti®-HP) on the color and sensory properties of these products were studied. For inulin concentrations studied (3, 5, 7 and 10 %, w/w) caused more intensed yellow and red colors. Hedonic sensory values of tuna packed in spring water and in mayonnaise showed no significant differences (p > 0.05) among products with different inulin addition levels (3, 5, 7 and 10 %, w/w) in terms of color, flavor, sweetness and overall characteristics. However, when packed in thousand island cream, significant differences (p < 0.05) in color and overall characteristics were found when inulin was added higher than 7 %. Tuna in salad cream showed significant differences (p < 0.05) in color, flavor, sweetness and overall characteristics at higher than 7 % inulin. The panelists showed acceptable overall liking scores at upto 7 % inulin of all tuna products. The thermal sterilization process resulted in approximately 20 % decrease in final inulin content. The calculated residual fructans of finished products at shelf life of 3 years were 3.01, 2.78, 2.90 and 2.84 % for tuna in spring water, tuna in mayonnaise, tuna in thousand island and tuna in salad cream, respectively. Considering formula cost in a commercial production and the recommended daily intake (RDI) of inulin in the finished product at end of shelf life (≥3 g/d), an addition of 5 % inulin for tuna in spring water and 7 % inulin for tuna in mayonnaise, tuna in thousand island and tuna in salad cream are recommended.

  14. On the status of the Long-tailed Marmot Marmota caudata (Mammalia: Rodentia: Sciuridae in Kargil, Ladakh (Indian Trans-Himalaya

    Directory of Open Access Journals (Sweden)

    Tanveer Ahmed

    2016-08-01

    Full Text Available Two species of marmots occur in India, the Himalayan Marmot Marmota himalayana and the Long-tailed Marmot or Golden Marmot Marmota caudata.  Marmots constitute part of the diet of some globally endangered carnivores in the Trans-Himalaya, yet studies on marmots in India are scanty.  Besides, the status of the Long-tailed Marmot is still unknown in India.  Considering this, a survey was carried out in Rangdum Valley, Kargil between May and July 2011 to collect baseline information on the Long-tailed Marmot.  Trails and roads were explored through walk and slow moving vehicle, respectively.  The Long-tailed Marmot was found to have a density of 14.31±2.10 per sq.km. and an encounter rate of 2.86±0.42 per km.  Most of the observations of Long-tailed Marmot were in hilly areas (77.7%, lower slope (48.8% and herbaceous meadow (38.0%.  The current information is expected to bring concern towards this lesser known species in India.  

  15. DISKRIMINASI KELAMIN PADA IKAN TUNA SIRIP KUNING, Yellowfin tuna MENGGUNAKAN ANALISIS DOT BLOT DAN ELISA

    Directory of Open Access Journals (Sweden)

    Gusti Ngurah Permana

    2014-08-01

    Full Text Available Pemahaman tentang penentuan jenis kelamin dalam populasi induk merupakan hal yang sangat penting bagi keberhasilan program pembenihan. Pengukuran reaksi antibodi dan aktivitas hormon testosterone, serta estradiol adalah metode dengan potensi yang secara akurat dapat menentukan jenis kelamin ikan tanpa mematikan ikan. Tujuan penelitian ini adalah untuk mengetahui akurasi metode dot blot dan ELISA dengan 11-ketotestorsterone (11-KT yang tersedia secara komersial EIA-kit untuk membedakan jenis kelamin ikan tuna sirip kuning. Hasil analisis menunjukkan bahwa metode dot blot menghasilkan ekspresi vitelogenin tampak jelas pada individu betina dan efek plasma terlihat transparan, jika dibandingkan dengan individu jantan. Interpretasi dari metode ini memerlukan pengalaman dan keahlian dalam akurasi pembacaan hasil. Aktivitas hormon 11-KT dengan sampel klip sirip dan plasma memberikan hasil yang baik dengan aktivitas hormon terlihat jelas.

  16. Bluefin tuna fishing and ranching: a difficult management problem

    NARCIS (Netherlands)

    Stefano, de V.; Heijden, van der P.G.M.

    2007-01-01

    The fish processing industry and consumers in Japan are willing to pay high (and sometimes outrageous) prices for fresh bluefin tuna with fat content and flesh colour just right to be served raw as sashimi or sushi. This willingness was and still is the economic incentive for a high fishing pressure

  17. Radiation hydrolysate of tuna cooking juice with enhanced antioxidant properties

    Science.gov (United States)

    Choi, Jong-il; Sung, Nak-Yun; Lee, Ju-Woon

    2012-08-01

    Tuna protein hydrolysates are of increasing interest because of their potential application as a source of bioactive peptides. Large amounts of tuna cooking juice with proteins and extracts are produced during the process of tuna canning, and these cooking juice wastes cause environmental problems. Therefore, in this study, cooking juice proteins were hydrolyzed by irradiation for their utilization as functional additives. The degree of hydrolysis of tuna cooking juice protein increased from 0% to 15.1% at the absorbed doses of 50 kGy. To investigate the antioxidant activity of the hydrolysate, it was performed the ferric reducing antioxidant power (FRAP) assay, and the lipid peroxidation inhibitory and superoxide radical scavenging activities were measured. The FRAP values increased from 1470 μM to 1930 μM and IC50 on superoxide anion was decreased from 3.91 μg/mL to 1.29 μg/mL at 50 kGy. All of the antioxidant activities were increased in the hydrolysate, suggesting that radiation hydrolysis, which is a simple process that does not require an additive catalysts or an inactivation step, is a promising method for food and environmental industries.

  18. A full lifecycle bioenergetic model for bluefin tuna.

    NARCIS (Netherlands)

    Jusup, M.; Klanjscek, T.; Matsuda, H.; Kooijman, S.A.L.M.

    2011-01-01

    We formulated a full lifecycle bioenergetic model for bluefin tuna relying on the principles of Dynamic Energy Budget theory. Traditional bioenergetic models in fish research deduce energy input and utilization from observed growth and reproduction. In contrast, our model predicts growth and

  19. Production of aspartic peptidases by Aspergillus spp. using tuna ...

    African Journals Online (AJOL)

    The production of extracellular aspartic peptidase by the fungi Aspergillus niger and Aspergillus awamori was carried out in a shake flask and in stirred tank submerged fermentations using tuna cooked wastewater, an industrial effluent, as nitrogen source for culture medium. In stirred tank fermentation, biomass production ...

  20. Stability versus neuronal specialization for STDP: long-tail weight distributions solve the dilemma.

    Directory of Open Access Journals (Sweden)

    Matthieu Gilson

    long-tail weight distributions, log-STDP achieves both stable dynamics for and robust competition of synapses, which are crucial for spike-based information processing.

  1. Tracing the phylogeographic history of Southeast Asian long-tailed macaques through mitogenomes of museum specimens.

    Science.gov (United States)

    Yao, Lu; Li, Hongjie; Martin, Robert D; Moreau, Corrie S; Malhi, Ripan S

    2017-11-01

    The biogeographical history of Southeast Asia is complicated due to the continuous emergences and disappearances of land bridges throughout the Pleistocene. Here, we use long-tailed macaques (Macaca fascicularis), which are widely distributed throughout the mainland and islands of Southeast Asia, asa model for better understanding the biogeographical patterns of diversification in this geographically complex region. A reliable intraspecific phylogeny including individuals from localities on oceanic islands, continental islands, and the mainland is needed to trace relatedness along with the pattern and timing of colonization in this region. We used high-throughput sequencing techniques to sequence mitochondrial genomes (mitogenomes) from 95 Southeast Asian M. fascicularis specimens housed at natural history museums around the world. To achieve a comprehensive picture, we more than tripled the mitogenome sample size for M. fascicularis from previous studies, and for the first time included documented samples from the Philippines and several small Indonesian islands. Confirming the result from a previous, recent intraspecific phylogeny for M. fascicularis, the newly reconstructed phylogeny of 135 specimens divides the samples into two major clades: Clade A includes haplotypes from the mainland and some from northern Sumatra, while Clade B includes all insular haplotypes along with lineages from southern Sumatra. This study resolves a previous disparity by revealing a disjunction in the origin of Sumatran macaques, with separate lineages originating within the two major clades, suggesting that at least two major migrations to Sumatra occurred. However, our dated phylogeny reveals that the two major clades split ∼1.88Ma, which is earlier than in previously published phylogenies. Our new data reveal that most Philippine macaque lineages diverged from the Borneo stock within the last ∼0.06-0.43Ma. Finally, our study provides insight into successful sequencing of DNA

  2. Phylogenetic relationships of Malaysia's long-tailed macaques, Macaca fascicularis, based on cytochrome b sequences.

    Science.gov (United States)

    Abdul-Latiff, Muhammad Abu Bakar; Ruslin, Farhani; Fui, Vun Vui; Abu, Mohd-Hashim; Rovie-Ryan, Jeffrine Japning; Abdul-Patah, Pazil; Lakim, Maklarin; Roos, Christian; Yaakop, Salmah; Md-Zain, Badrul Munir

    2014-01-01

    Phylogenetic relationships among Malaysia's long-tailed macaques have yet to be established, despite abundant genetic studies of the species worldwide. The aims of this study are to examine the phylogenetic relationships of Macaca fascicularis in Malaysia and to test its classification as a morphological subspecies. A total of 25 genetic samples of M. fascicularis yielding 383 bp of Cytochrome b (Cyt b) sequences were used in phylogenetic analysis along with one sample each of M. nemestrina and M. arctoides used as outgroups. Sequence character analysis reveals that Cyt b locus is a highly conserved region with only 23% parsimony informative character detected among ingroups. Further analysis indicates a clear separation between populations originating from different regions; the Malay Peninsula versus Borneo Insular, the East Coast versus West Coast of the Malay Peninsula, and the island versus mainland Malay Peninsula populations. Phylogenetic trees (NJ, MP and Bayesian) portray a consistent clustering paradigm as Borneo's population was distinguished from Peninsula's population (99% and 100% bootstrap value in NJ and MP respectively and 1.00 posterior probability in Bayesian trees). The East coast population was separated from other Peninsula populations (64% in NJ, 66% in MP and 0.53 posterior probability in Bayesian). West coast populations were divided into 2 clades: the North-South (47%/54% in NJ, 26/26% in MP and 1.00/0.80 posterior probability in Bayesian) and Island-Mainland (93% in NJ, 90% in MP and 1.00 posterior probability in Bayesian). The results confirm the previous morphological assignment of 2 subspecies, M. f. fascicularis and M. f. argentimembris, in the Malay Peninsula. These populations should be treated as separate genetic entities in order to conserve the genetic diversity of Malaysia's M. fascicularis. These findings are crucial in aiding the conservation management and translocation process of M. fascicularis populations in Malaysia.

  3. Intergroup variation in robbing and bartering by long-tailed macaques at Uluwatu Temple (Bali, Indonesia).

    Science.gov (United States)

    Brotcorne, Fany; Giraud, Gwennan; Gunst, Noëlle; Fuentes, Agustín; Wandia, I Nengah; Beudels-Jamar, Roseline C; Poncin, Pascal; Huynen, Marie-Claude; Leca, Jean-Baptiste

    2017-10-01

    Robbing and bartering (RB) is a behavioral practice anecdotally reported in free-ranging commensal macaques. It usually occurs in two steps: after taking inedible objects (e.g., glasses) from humans, the macaques appear to use them as tokens, returning them to humans in exchange for food. While extensively studied in captivity, our research is the first to investigate the object/food exchange between humans and primates in a natural setting. During a 4-month study in 2010, we used both focal and event sampling to record 201 RB events in a population of long-tailed macaques (Macaca fascicularis), including four neighboring groups ranging freely around Uluwatu Temple, Bali (Indonesia). In each group, we documented the RB frequency, prevalence and outcome, and tested the underpinning anthropogenic and demographic determinants. In line with the environmental opportunity hypothesis, we found a positive qualitative relation at the group level between time spent in tourist zones and RB frequency or prevalence. For two of the four groups, RB events were significantly more frequent when humans were more present in the environment. We also found qualitative partial support for the male-biased sex ratio hypothesis [i.e., RB was more frequent and prevalent in groups with higher ratios of (sub)adult males], whereas the group density hypothesis was not supported. This preliminary study showed that RB is a spontaneous, customary (in some groups), and enduring population-specific practice characterized by intergroup variation in Balinese macaques. As such, RB is a candidate for a new behavioral tradition in this species.

  4. Penanganan penyu yang tertangkap rawai tuna di Samudera Hindia

    Directory of Open Access Journals (Sweden)

    Budi Nugraha

    2017-03-01

    Full Text Available Turtle is one of the vulnerable of megafauna and as a by-catch in tuna longline fisheries, however, management practices have not been done yet. This paper described the efforts to avoid the capture of turtles on the tuna longline fishery and its handling recommendation. It has been written based on the research results and observer programs of activities that have been implemented since 2005. It’s also including a literature review rules and regulations regarding the management of sea turtles. The record results during 2005 - 2014 conducted by an independent scientific board on tuna longline in the Indian Ocean with 72 times number of setting and 89,441number of hooks. There are 105 turtles caught, which are leatherback, olive ridley turtles, hawksbill, loggerhead sea turtles as well as the unknown green turtle where the current status of turtles in the Indian Ocean is in a state of vulnerable, endangered, critically even endangered. The olive ridley turtle, loggerhead and leatherback turtles are in a vulnerable status. While, the green turtles are in a state endangered and even hawksbill in a state extremely endangered. Policy measures for handling of turtles in tuna longline fishery needs to be taken in order to be implemented include the socialization of the use of intensified circle hooks and if necessary the government issued regulations regarding the use of circle hooks, the implementation of the placement of fishing monitoring (observer aboard the tuna longline in order to assist the skippers monitoring the catch of turtles and turtle handling training for the skippers and crew in order to hold the caught turtles can be handled directly on the boat to reduce the mortality turtles which can be released back into the sea alive. Penyu merupakan salah satu biota yang rawan punah dan sebagai hasil tangkapan sampingan pada perikanan rawai tuna dimana pengelolaannya belum banyak dilakukan. Makalah ini membahas tentang upaya bagaimana

  5. Pair housing for female longtailed and rhesus macaques in the laboratory: behavior in protected contact versus full contact.

    Science.gov (United States)

    Baker, Kate C; Crockett, Carolyn M; Lee, Grace H; Oettinger, Brooke C; Schoof, Valérie; Thom, Jinhee P

    2012-01-01

    Pair housing for caged macaques in the laboratory generally allows unrestricted tactile contact but, less commonly, may involve limited contact via grooming-contact bars or perforated panels. The purpose of using this protected contact housing, which prevents entry into pair-mates' cages, typically is to accommodate research and management requirements. The study used behavioral data collected on 12 pairs of female longtailed macaques (Macaca fascicularis) at the Washington National Primate Research Center and 7 pairs of female rhesus macaques (Macaca mulatta) housed at the Tulane National Primate Research Center to assess the relative benefits of protected versus full protected contact. The study collected data in stable pairs housed first in protected contact followed by full contact. Species combined, the study found the presence of the panel was associated with lower levels of social grooming and higher levels of self-grooming, abnormal behavior, and tension-related behavior. Within species, only the protected- versus full-contact contrasts for abnormal and tension were statistically significant-and only for rhesus macaques. Results suggest that for female rhesus macaques, potential disadvantages or inconveniences of full contact should be balanced against the improved behavioral profile in comparison to protected contact. The use of protected contact among female longtailed macaques does not appear to require the same cost-benefit analysis. Copyright © Taylor & Francis Group, LLC

  6. Atypical feeding behavior of Long-tailed Ducks in the wake of a commercial fishing boat while clamming

    Science.gov (United States)

    Perry, Matthew; Osenton, Peter C.; White, Timothy P.

    2017-01-01

    A foraging group of Clangula hyemalis (Long-tailed Duck) was observed on 10 February 2010 diving behind a commercial boat that was clamming near Monomoy Island, Nantucket Sound, MA. We used a shotgun to collect 9 of the ducks, and our analyses of gizzard and gullet (esophagus and proventriculus) revealed 37 food items in the gizzard and 16 in the gullet. Mollusca were the dominant food in the gizzard (49%), whereas Crustacea were dominant in the gullet (57%). Crustacea were the second most important food in the gizzard (38%), whereas Mollusca were the second most important food in the gullet (31%). Relatively high volumes of the Amphipoda Caprella sp. (skeleton shrimp) and the Decopoda Crangon septemspinosa (Sand Shrimp) were recorded in the gullet and gizzard. Ensis directus (Atlantic Jackknife Clam) formed the greatest volume of Mollusca in the gizzard (15%) and in the gullet (15%). Long-tailed Ducks had fed on this Bivalvia and several other species of Mollusca that had no shell or broken shell when consumed. Many of the food organisms were apparently dislodged and some damaged by the clamming operation creating an opportunistic feeding strategy for the Long-tailed Ducks.

  7. Hubungan Antara Body Image Dan Self-esteem Pada Dewasa Awal Tuna Daksa

    OpenAIRE

    Sari, Dahlia Nur Permata

    2012-01-01

    Penelitian ini meneliti mengenai pengaruh body image terhadap selfesteem pada dewasa awal tuna daksa. Hipotesis pada penelitian ini adalah adanya hubungan positif antara body image dan self-esteem pada dewasa awal tuna daksa. Semakin positif body image maka semakin tinggi self-esteem yang dimiliki, begitu juga sebaliknya, semakin negatif body image maka semakin rendah self-esteem yang dimiliki. Sampel penelitian sebanyak 30 dewasa awal tuna daksa yang memiliki cacat tubuh seteleh kelahiran. D...

  8. GENETIC IDENTIFICATION FOR TUNA AND RAINBOW RUNNER CAPTURE IN NORTH BALI WATERS

    Directory of Open Access Journals (Sweden)

    Gusti Ngurah Permana

    2006-06-01

    Full Text Available Gondol Research Institute for Mariculture identification of tuna and rainbow runner was an objective in this current study. Samples of five species were collected from territorial water of North Bali. The method used in this study was allozyme electrophoresis. The results showed that buffer of CAPM-6 (citric acid aminoprophylmorpholine resulted in a sharp and clear banding pattern. The species could be differentiated in six diagnostic isozyme patterns Idh* (isocitrate dehydrogenase, 6Pgd* (6 phosphogluconate dehydrogenase, Gpi* (glucose phosphate isomerase, Mdh* (malate dehydrogenase, Est* (esterase, and Sp* (sarcoplasmic protein. All species were in Hardy-weinberg equilibrium. Heterozygosities of species were ranged from 0.00 to 0.099. Yellowfin tuna has the highest heterozigosity compared with the other species. Clustering samples according to pairs revealed that genetic distance of Bullet tuna (A. rochei and Eastern little tuna (E. affinis had small value (0.001. By contrast, the largest value was observed between yellowfin tuna, T. albacares and rainbow runner, E. bipunnulata (0.007. This value indicated that Bullet tuna (A. rochei and Eastern little tuna (E. affinis closed relation, while among yellowfin tuna, skipjack tuna, and rainbow runner, were separated phylogenically.

  9. Dynamic optimal foraging theory explains vertical migrations of bigeye tuna

    DEFF Research Database (Denmark)

    Thygesen, Uffe Høgsbro; Sommer, Lene; Evans, Karen

    2016-01-01

    Bigeye tuna are known for remarkable daytime vertical migrations between deep water, where food is abundant but the water is cold, and the surface, where water is warm but food is relatively scarce. Here we investigate if these dive patterns can be explained by dynamic optimal foraging theory...... behaves such as to maximize its energy gains. The model therefore provides insight into the processes underlying observed behavioral patterns and allows generating predictions of foraging behavior in unobserved environments...

  10. Convergent evolution in mechanical design of lamnid sharks and tunas.

    Science.gov (United States)

    Donley, Jeanine M; Sepulveda, Chugey A; Konstantinidis, Peter; Gemballa, Sven; Shadwick, Robert E

    2004-05-06

    The evolution of 'thunniform' body shapes in several different groups of vertebrates, including whales, ichthyosaurs and several species of large pelagic fishes supports the view that physical and hydromechanical demands provided important selection pressures to optimize body design for locomotion during vertebrate evolution. Recognition of morphological similarities between lamnid sharks (the most well known being the great white and the mako) and tunas has led to a general expectation that they also have converged in their functional design; however, no quantitative data exist on the mechanical performance of the locomotor system in lamnid sharks. Here we examine the swimming kinematics, in vivo muscle dynamics and functional morphology of the force-transmission system in a lamnid shark, and show that the evolutionary convergence in body shape and mechanical design between the distantly related lamnids and tunas is much more than skin deep; it extends to the depths of the myotendinous architecture and the mechanical basis for propulsive movements. We demonstrate that not only have lamnids and tunas converged to a much greater extent than previously known, but they have also developed morphological and functional adaptations in their locomotor systems that are unlike virtually all other fishes.

  11. 50 CFR 216.92 - Dolphin-safe requirements for tuna harvested in the ETP by large purse seine vessels.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Dolphin-safe requirements for tuna... MAMMALS REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS Dolphin Safe Tuna Labeling § 216.92 Dolphin-safe requirements for tuna harvested in the ETP by large purse seine vessels. (a) U.S...

  12. Radiographic measurement of the cardiothoracic ratio in a feral population of long-tailed macaques (Macaca fascicularis)

    Energy Technology Data Exchange (ETDEWEB)

    Schillaci, Michael A. [Department of Social Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4 (Canada)], E-mail: schillaci@utsc.utoronto.ca; Lischka, Andrea R.; Karamitsos, Anisah A. [Department of Social Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4 (Canada); Engel, Gregory A. [Swedish/Cherry Hill Family Medicine Residency, 550 16th Avenue, Seattle, WA 98122 (United States); Washington National Primate Research Center, University of Washington, Seattle, WA 98195 (United States); Paul, Narinder [Division of Cardiothoracic Imaging, University Health Network, University of Toronto, Toronto, Ontario M5G 2N2 (Canada); Ramoul, Rima [Department of Social Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4 (Canada); Rompis, Aida; Putra, Arta; Wandia, I. Nengah [Fakultas Kedokteran Hewan, Udayana University, Denpasar, Bali 80361 (Indonesia); Jones-Engel, Lisa [Washington National Primate Research Center, University of Washington, Seattle, WA 98195 (United States)

    2010-05-15

    The cardiothoracic ratio is often used as a proxy measure of cardiovascular pathophysiology in humans but less frequently in nonhuman primates, for whom little published data are available to establish normal values. The present study is the first to examine relative cardiac size in a feral population of primates. This report presents estimates of the cardiothoracic ratio in long-tailed macaques (Macaca fascicularis) from Bali, Indonesia. The mean cardiothoracic ratio for the study sample was 0.55, above the commonly used threshold of 0.50 for identifying an enlarged heart in human medicine. Future research on wild populations of macaques is needed and should include multiple assessments of cardiac function including both radiography and echocardiography.

  13. Radiographic measurement of the cardiothoracic ratio in a feral population of long-tailed macaques (Macaca fascicularis)

    International Nuclear Information System (INIS)

    Schillaci, Michael A.; Lischka, Andrea R.; Karamitsos, Anisah A.; Engel, Gregory A.; Paul, Narinder; Ramoul, Rima; Rompis, Aida; Putra, Arta; Wandia, I. Nengah; Jones-Engel, Lisa

    2010-01-01

    The cardiothoracic ratio is often used as a proxy measure of cardiovascular pathophysiology in humans but less frequently in nonhuman primates, for whom little published data are available to establish normal values. The present study is the first to examine relative cardiac size in a feral population of primates. This report presents estimates of the cardiothoracic ratio in long-tailed macaques (Macaca fascicularis) from Bali, Indonesia. The mean cardiothoracic ratio for the study sample was 0.55, above the commonly used threshold of 0.50 for identifying an enlarged heart in human medicine. Future research on wild populations of macaques is needed and should include multiple assessments of cardiac function including both radiography and echocardiography.

  14. Performance differences of Rhode Island Red, Bashang Long-tail Chicken, and their reciprocal crossbreds under natural cold stress.

    Science.gov (United States)

    Xie, Shanshan; Yang, Xukai; Gao, Yahui; Jiao, Wenjie; Li, Xinghua; Li, Yajie; Ning, Zhonghua

    2017-10-01

    The Bashang Long-tail chicken (BS), an indigenous Chinese breed, is considered cold tolerant. We selected BS, the Rhode Island Red (RIR), and their reciprocal crossbreds for the present study. The objectives were: i) to validate whether BS is cold tolerant and whether egg production and cold tolerance of crossbreds could be improved; and ii) to determine the physiological characteristics that underlie cold tolerance and favorable egg production performance in cold environments. A total of 916 chickens were reared in warm and natural cold environments (daily mean ambient temperature varied from 7.4°C to 26.5°C in the warm environment and from -17.5°C to 27.0°C in the cold environment). To investigate their adaptability to the cold environment, the egg production performance and body weight were monitored and compared between breeds and environments. The cloacal temperature and serum biochemical parameters were monitored to reveal the physiological characteristics underlie cold tolerance and favorable egg production performance in the cold environment. The warm environment experiment showed that RIR had the highest egg production performance, and that the reciprocal crossbreds had a higher egg production performance than BS. While in the cold environment RIR had the lowest egg production performance, and the reciprocal crossbreds had a higher egg production performance than BS. In the cold environment BS and reciprocal crossbreds had higher triiodothyronine, tetraiodothyronine levels than RIR. At 35 and 39 wk of age, when the ambient temperature was extremely low (varied from -20°C to 0°C), serum glucose, follicle-stimulating hormone, luteinizing hormone, estradiol of BS and crossbreds were higher than RIR. Bashang Long-tail chicken has a favorable cold tolerance ability. Crossbreeding with RIR and BS is an effective way to develop cold tolerant chickens with improved egg production performance.

  15. Diet of larval albacore Thunnus alalunga (Bonnaterre, 1788 off Mallorca Island (NW Mediterranean

    Directory of Open Access Journals (Sweden)

    Ignacio Alberto Catalán

    2007-06-01

    Full Text Available These are the first data on the feeding of larval albacore (Thunnus alalunga Bonnaterre, 1788 in the Mediterranean. Specimens were gathered from day-time bongo-hauls conducted over the SW Mallorcan (Balearic Islands shelf-slope. Ninety eight percent of 101 individuals ranging from 2.65 to 9.4 mm standard length (SL contained 1 to 15 prey items per gut. Mean number of prey/gut was 3.55 ± 2.19 (SD. A positive correlation was found between larval SL and the number of prey/gut. The analysis of frequency of occurrence (F, numerical frequency (N, weight frequency (W and the Index of Relative Importance (IRI showed a dominance of copepodites and nauplii in the smallest size-class. As larvae grew, cladocerans and Calanoida copepodites dominated the diet, and cladocerans and copepodites were important in F, N and W. Piscivory was observed after notochord flexion and was important in terms of W. A positive correlation between mean prey size and both SL and lower jaw length (LJL was observed. The niche breadth (S did not vary with LJL, but the raw prey size range did. Larger copepodites, the absence of nauplii and the incorporation of fish larvae and a larger number of cladocerans in the diet accounted for the increase in mean prey size through increased larval size.

  16. Can Cooperative Management of Tuna Fisheries in the Western Pacific Solve the Growth Overfishing Problem?

    NARCIS (Netherlands)

    Bailey, M.L.; Rashid Sumaila, U.; Martell, S.J.D.

    2013-01-01

    Tuna fisheries in the western and central Pacific Ocean are important globally for both food and economic security. Yellowfin and bigeye tuna stocks in this region are declining, in part due to the juvenile bycatch of these species by the purse seine fishery using floating objects and fish

  17. 77 FR 73969 - International Fisheries; Pacific Tuna Fisheries; Fishing Restrictions in the Eastern Pacific Ocean

    Science.gov (United States)

    2012-12-12

    ... overfishing of the stock. DATES: Comments must be submitted in writing by January 11, 2013. A public hearing... effort quotas are an important step for reducing the overfishing of bluefin tuna. In 2011, NMFS determined overfishing is occurring on Pacific bluefin tuna based on stock assessment results of the...

  18. 76 FR 283 - International Fisheries; Pacific Tuna Fisheries; Vessel Capacity Limit in the Purse Seine Fishery...

    Science.gov (United States)

    2011-01-04

    ... of implementing a capacity management regime, the United States chose to further limit its fleet... Inter-American Tropical Tuna Commission (IATTC) Resolution on the Capacity of the Tuna Fleet Operating.... industry consistent with the IATTC management framework. DATES: These regulations become effective on...

  19. 77 FR 24669 - Atlantic Highly Migratory Species; Public Conference Call Regarding Recreational Yellowfin Tuna...

    Science.gov (United States)

    2012-04-25

    ... collection in the U.S. recreational yellowfin tuna fishery and the relationship to international yellowfin...-XB162 Atlantic Highly Migratory Species; Public Conference Call Regarding Recreational Yellowfin Tuna... Administration (NOAA), Commerce. ACTION: Notice of public conference call. SUMMARY: In order to better inform the...

  20. Perilaku Tuna Fungsi Auditor: Pengujian atas Karakteristik Personal dan Penilai Kinerja Auditor

    Directory of Open Access Journals (Sweden)

    Aprina Nugrahesthy Sulistya Hapsari

    2016-12-01

      Fenomena perilaku tuna fungsi yang dilakukan oleh auditor makin dianggap lazim di lingkup audit. Hubungan antara karakteristik personal, karakteristik non personal dan perilaku tuna fungsi menjadi sesuatu hal yang menarik untuk diteliti. Penelitian ini menguji hubungan antara karakteristik personal berupa locus of control, tingkat kinerja pribadi karyawan, komitmen organisasi dan turnover intention dan penilai kinerja auditor sebagai faktor diluar karakteristik personal terhadap penerimaan perilaku tuna fungsi dalam lingkup audit. Pengumpulan data dilakukan melalui kuisioner dari responden yaitu auditor di KAP Kota Semarang dan Surakarta dengan metode convenience sampling karena populasi auditor yang bekerja tidak diketahui dengan pasti. Analisis data dengan menggunakan Model Persamaan Struktural. Hasil dari pengujian hipotesis mengindikasikan bahwa tidak ada hubungan antara karakteristik personal dengan penerimaan perilaku tuna fungsi dalam ruang lingkup audit. Sementara itu di lain sisi terdapat hubungan antara penilai kinerja auditor dengan penerimaan perilaku tuna fungsi dalam ruang lingkup audit.

  1. An evaluation of management strategies for Atlantic tuna stocks

    Directory of Open Access Journals (Sweden)

    L. T. Kell

    2003-04-01

    Full Text Available International agreements for the International Commission for the Conservation of Atlantic Tunas (ICCAT convention area imply that Atlantic tuna stocks should be managed by strategies based on maximum sustainable yield (MSY; however, there is concern whether this will actually ensure sustainability with sufficiently high probability consistent with the principals of the precautionary approach. Therefore, the performance of MSY management strategies based on current assessment procedures was evaluated using a computer simulation framework. The framework includes the data collection, assessment, prediction, and management processes, as well as the implementation of management regulations. It therefore provides an integrated way to evaluate the relative importance of and the interactions between each component of the system with regard to the overall success of the management strategy. The study elucidates guidelines about assessment and management that are general enough to be applied to all tunas in the Atlantic Ocean. It does so by comparing different hypotheses about management and assessment for three stocks (North Atlantic albacore, Atlantic bigeye and East Atlantic skipjack, which are representative of the variety encountered (i.e. from data rich to poor and tropical to temperate waters in ICCAT stocks. Management performance was especially sensitive to the carrying capacity of the stock. The type of proxy used for MSY was more important to the success of the procedure than the frequency of assessment or the number of indices used in the assessment. Whilst the procedure was successful at achieving the management objectives for albacore, it was only partially successful for bigeye and was too conservative for skipjack.

  2. Tuna cannery energy conservation interventions: Technical/economic feasibility study

    Energy Technology Data Exchange (ETDEWEB)

    Florio, G. (Calabria Univ. Arcavacata di Rende (Italy). Dipt. di Meccanica)

    An energy audit was conducted on a 230,000 can (x 80 g)/day tuna cannery to determine where technically and economically feasible energy savings interventions could be made. The plant is equipped with an oil fired boiler which supplies steam for cooking and sterilization purposes. In the energy/cost analysis, it was found that the most significant and cost effective energy savings could be obtained by the substitution of the four sterilization chambers with three sets of twin sterilization/heat exchange chambers.

  3. Predicting the Distribution of Yellowfin Tuna in Philippine Waters

    Science.gov (United States)

    Perez, G. J. P.; Leonardo, E. M.

    2015-12-01

    The Philippines is considered as a major tuna producer in the Western and Central Pacific Ocean, both for domestic consumption and on industrial scale. However, with the ever-increasing demand of growing population, it has always been a challenge to achieve sustainable fishing. The creation of satellite-derived potential fishing zone maps is a technology that has been adopted by advanced countries for almost three decades already and has led to reduction in search times by up to 40%. In this study, a Generalized Additive Model (GAM) is developed to predict the distribution of the Yellowfin tuna species in seas surrounding the Philippines based on the Catch-Per-Unit-Effort (CPUE) index. Level 3 gridded chlorophyll-a and sea surface temperature from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite of the National Aeronautics and Space Administration (NASA) are the main input parameters of the model. Chlorophyll-a is linked with the presence of phytoplankton, which indicates primary productivity and suggests potential regions of fish aggregation. Fish also prefers to stay in regions where the temperature is stable, thus the sea surface temperature fronts serve as a guide to locate concentrations of fish school. Historical monthly tuna catch data from Western and Central Pacific Commissions (WCPFC) is used to train the model. The resulting predictions are converted to potential fishing zone maps and are evaluated within and beyond the historical time range of the training data used. Diagnostic tests involving adjusted R2 value, GAM residual plots and root mean square error value are used to assess the accuracy of the model. The generated maps were able to confirm locations of known tuna fishing grounds in Mindanao and other parts of the country, as well us detect their seasonality and interannual variability. To improve the performance of the model, ancillary data such as surface winds reanalysis from National Centers for

  4. Genetic structure offers insights into the evolution of migration and the taxonomy of the Barred Long-tailed Cuckoo Cercococcyx montanus species complex

    DEFF Research Database (Denmark)

    Engel, Joshua I.; Byamana, Kizungu; Kahindo, Charles

    2014-01-01

    and argue that migration was gained and then lost in the C. montanus complex. Based on consistent morphological and genetic differences, we suggest that Barred Long-tailed Cuckoo is best treated as two species, one of which (C. montanus) is a non-migratory Albertine Rift endemic.......Barred Long-tailed Cuckoo (Cercococcyx montanus) currently comprises two morphologically distinct subspecies, one resident in the Albertine Rift (montanus) and one in east and southeast Africa (patulus) in which there are migrations that are poorly understood. Based on nuclear and mitochondrial DNA...... sequences, we find that two specimens collected in relatively low-elevation forest in the Albertine Rift were correctly identified from plumage as the migratory subspecies whose closest known breeding area is > 800 km to the east. We discuss ways in which this unique migratory pattern could have evolved...

  5. Aiding pest control management of long-tailed macaques (Macaca fascicularis fascicularis) in Malaysia by using molecular markers of mitochondrial DNA

    Science.gov (United States)

    Abdul-Latiff, M. A. B.; Abdul-Patah, P.; Yaakop, S.; Md-Zain, B. M.

    2017-10-01

    The long-tailed macaques (Macaca fascicularis fascicularis) has been the center of human wildlife conflict in Malaysia since 1970s. This well-adapted and opportunistic primates have been dominating wide range of habitat in Malaysia such as primary and secondary forest, mangrove, as well as human settlements. The conventional practices of translocation by the authorities are threatening the uniqueness of gene pool for this species and ironically contradicting with the ultimate purpose of genetic conservation of this species. The objectives of this study is to determine the level of genetic separation between populations of long-tailed macaques, primarily focusing on populations distributed in northern Peninsular Malaysia. A total of 954 base pairs of control regions mtDNA was sequenced and analyzed from 27 samples of M. fascicularis. The results exhibited a highly homogenous state of populations for long-tailed macaques genetically and this ultimately indicate unsuitable management and planning in terms of pest control management of the species. Authorities are suggested to translocate the species at least within the state boundaries to avoid homogeneity of gene pools for the particular species.

  6. Global pollution monitoring of butyltin compounds using skipjack tuna as a bioindicator

    International Nuclear Information System (INIS)

    Ueno, D.; Inoue, S.; Takahashi, S.; Ikeda, K.; Tanaka, H.; Subramanian, A.N.; Fillmann, G.; Lam, P.K.S.; Zheng, J.; Muchtar, M.; Prudente, M.; Chung, K.; Tanabe, S.

    2004-01-01

    Global pollution monitoring of butyltin in offshore water and open sea were conducted using skipjack tuna as a bioindicator. - Butyltin compounds (BTs) including mono- (MBT), di- (DBT), tri-butyltin (TBT) and total tin (ΣSn), were determined in the liver of skipjack tuna (Katsuwonus pelamis) collected from Asian offshore waters (off-Japan, the Japan Sea, off-Taiwan, the East China Sea, the South China Sea, off-Philippines, off-Indonesia, the Bay of Bengal), off-Seychelles, off-Brazil and open seas (the North Pacific). BTs were detected in all the skipjack tuna collected, suggesting widespread contamination of BTs even in offshore waters and open seas on a global scale. Considering specific accumulation, Sex-, body length- differences and migration of skipjack tuna did not seem to affect BT concentrations, indicating rapid reflection of the pollution levels in seawater where and when they were collected. Skipjack tuna is a suitable bioindicator for monitoring the global distribution of BTs in offshore waters and open seas. High concentrations of BTs were observed in skipjack tuna from offshore waters around Japan, a highly developed and industrialized region (up to 400 ng/g wet weight). Moreover skipjack tuna collected from offshore waters around Asian developing countries also revealed the levels comparable to those in Japan (up to 270 ng/g wet weight) which may be due to the recent improvement in economic status in Asian developing countries. High percentages (almost 90%) of BTs in total tin (ΣSn: sum of inorganic tin+organic tin) were found in the liver of skipjack tuna from offshore waters around Asian developing countries. This finding suggests that the anthropogenic BTs represent the major source of Sn accumulation in skipjack tuna from these regions

  7. Global pollution monitoring of butyltin compounds using skipjack tuna as a bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, D.; Inoue, S.; Takahashi, S.; Ikeda, K.; Tanaka, H.; Subramanian, A.N.; Fillmann, G.; Lam, P.K.S.; Zheng, J.; Muchtar, M.; Prudente, M.; Chung, K.; Tanabe, S

    2004-01-01

    Global pollution monitoring of butyltin in offshore water and open sea were conducted using skipjack tuna as a bioindicator. - Butyltin compounds (BTs) including mono- (MBT), di- (DBT), tri-butyltin (TBT) and total tin ({sigma}Sn), were determined in the liver of skipjack tuna (Katsuwonus pelamis) collected from Asian offshore waters (off-Japan, the Japan Sea, off-Taiwan, the East China Sea, the South China Sea, off-Philippines, off-Indonesia, the Bay of Bengal), off-Seychelles, off-Brazil and open seas (the North Pacific). BTs were detected in all the skipjack tuna collected, suggesting widespread contamination of BTs even in offshore waters and open seas on a global scale. Considering specific accumulation, Sex-, body length- differences and migration of skipjack tuna did not seem to affect BT concentrations, indicating rapid reflection of the pollution levels in seawater where and when they were collected. Skipjack tuna is a suitable bioindicator for monitoring the global distribution of BTs in offshore waters and open seas. High concentrations of BTs were observed in skipjack tuna from offshore waters around Japan, a highly developed and industrialized region (up to 400 ng/g wet weight). Moreover skipjack tuna collected from offshore waters around Asian developing countries also revealed the levels comparable to those in Japan (up to 270 ng/g wet weight) which may be due to the recent improvement in economic status in Asian developing countries. High percentages (almost 90%) of BTs in total tin ({sigma}Sn: sum of inorganic tin+organic tin) were found in the liver of skipjack tuna from offshore waters around Asian developing countries. This finding suggests that the anthropogenic BTs represent the major source of Sn accumulation in skipjack tuna from these regions.

  8. Skipjack tuna as a bioindicator of contamination by perfluorinated compounds in the oceans.

    Science.gov (United States)

    Hart, Kimberly; Kannan, Kurunthachalam; Tao, Lin; Takahashi, Shin; Tanabe, Shinsuke

    2008-09-15

    Perfluorinated chemicals (PFCs) have emerged as global environmental contaminants. Studies have reported the widespread occurrence of PFCs in biota from marine coastal waters and in remote polar regions. However, few studies have reported the distribution of PFCs in biota from offshore waters and open oceans. In this study, concentrations of nine PFCs were determined in the livers of 60 skipjack tuna (Katsuwonus pelamis) collected from offshore waters and the open ocean along the Pacific Rim, including the Sea of Japan, the East China Sea, the Indian Ocean, and the Western North Pacific Ocean, during 1997-1999. At least one of the nine PFCs was found in every tuna sample analyzed. Overall, perfluorooctanesulfonate (PFOS) and perfluoroundecanoic acid (PFUnDA) were the predominant compounds found in livers of tuna at concentrations of ocean locations, concentrations of PFUnDA were greater than the concentrations of PFOS. The profiles and concentrations of PFCs in tuna livers suggest that the sources in East Asia are dominated by long-chain perfluorocarboxylates, especially PFUnDA. High concentrations of PFUnDA in tuna may indicate a shift in sources of PFCs in East Asia. The spatial distribution of PFOS in skipjack tuna reflected the concentrations previously reported in seawater samples from the Pacific and Indian Oceans, suggesting that tuna are good bioindicators of pollution by PFOS. Despite its predominance in ocean waters, PFOA was rarely found in tuna livers, indicative of the low bioaccumulation potential of this compound. Our study establishes baseline concentrations of PFCs in skipjack tuna from the oceans of the Asia-Pacific region, enabling future temporal trend studies of PFCs in oceans.

  9. KAPASITAS PENANGKAPAN PANCING ULUR TUNA DI KEPULAUAN BANDA NEIRA

    Directory of Open Access Journals (Sweden)

    Baihaqi Baihaqi

    2016-04-01

    Fishing capacity is an approach to fishery management relating to restrictions on fishing effort capacity. The effort capacity is determined by several variables such as vessel  and engine sizes, the size of the nets, and fishing tool technology. Study of fishing capacity based fisheries management is an alternative approach to control the input factors that are not efficiently used in fishing effort. Through the research capacity, it is expected to know the level of technical efficiency of fishing tuna fishing fleet in the Banda Sea. Fishing capacity was examined using analysis technique Data Envelopment Analysis (DEA using a linear programming. The results show that the tuna line fisheries in the Banda Neira with single output approach (catch weight, was generally at the level of efficiency that is far under from the optimal level with the current input has exceeded the optimal capacity. To achieve the production potential of the third fishing grounds, reductions of the capacity of 33%, 42% and 45% for Hatta Island, Manukang Island and Rhum Island, respectively should be done.

  10. Treatment of tuna cooking juices by nano filtration

    International Nuclear Information System (INIS)

    Walha, K. a.; Ben Amar, R.; Bourseau, P.; Jaouen, P.

    2009-01-01

    Canned tuna is among the largest commercial canned fishery product in Tunisia. This industry rejects many aqueous effluents (washing, thawing, rinsing and cooking waters). Cooking juice represents 50 pour cent of the total effluent volume. It has a high organic load and a very high salt content. For consequence, discarding directly the effluent in the environment is not possible and need further treatment. However, the juice seems to contain interesting flavour compounds. In this work, a membrane process system consisting in nano filtration was used to reduce the pollution load and to concentrate flavour compounds of tuna cooking juice. The NF membrane tested in this work concentrate the organic matter since the retentions are high, starting at 74 pour cent for total circulation and increasing up to 85 pour cent for volume reduction factor (VRF) of 5. The membrane undergoes severe fouling, it can be effectively cleaned through a complete basic-acid washing cycle. The effect of three chemical reagents was studied for the regeneration of the fouled membrane. In the future, we will focus on the concentrates obtained by NF: sensory analysis with a panel of trained tasters and analysis of aromatic molecules should allow to value the quality of the flavouring concentrates.

  11. Human behavior and opportunities for parasite transmission in communities surrounding long-tailed macaque populations in Bali, Indonesia.

    Science.gov (United States)

    Lane-DeGraaf, Kelly E; Putra, I G A Arta; Wandia, I Nengah; Rompis, Aida; Hollocher, Hope; Fuentes, Agustin

    2014-02-01

    Spatial overlap and shared resources between humans and wildlife can exacerbate parasite transmission dynamics. In Bali, Indonesia, an agricultural-religious temple system provides sanctuaries for long-tailed macaques (Macaca fascicularis), concentrating them in areas in close proximity to humans. In this study, we interviewed individuals in communities surrounding 13 macaque populations about their willingness to participate in behaviors that would put them at risk of exposure to gastrointestinal parasites to understand if age, education level, or occupation are significant determinants of exposure behaviors. These exposure risk behaviors and attitudes include fear of macaques, direct contact with macaques, owning pet macaques, hunting and eating macaques, and overlapping water uses. We find that willingness to participate in exposure risk behaviors are correlated with an individual's occupation, age, and/or education level. We also found that because the actual risk of infection varies across populations, activities such as direct macaque contact and pet ownership, could be putting individuals at real risk in certain contexts. Thus, we show that human demographics and social structure can influence willingness to participate in behaviors putting them at increased risk for exposure to parasites. © 2013 Wiley Periodicals, Inc.

  12. Comparative community-level associations of helminth infections and microparasite shedding in wild long-tailed macaques in Bali, Indonesia.

    Science.gov (United States)

    Wilcox, Justin J S; Lane-Degraaf, Kelly E; Fuentes, Agustin; Hollocher, Hope

    2015-03-01

    Helminthes have the capacity to modulate host immunity, leading to positive interactions with coinfecting microparasites. This phenomenon has been primarily studied during coinfections with a narrow range of geo-helminthes and intracellular microparasites in human populations or under laboratory conditions. Far less is known regarding differences in coinfection dynamics between helminth types, the range of microparasites that might be affected or the overall community-level effects of helminth infections on microparasites in wild systems. Here, we analysed the presence/absence and abundance patterns of enteric parasites in long-tailed macaques (Macaca fascicularis) on the island of Bali, Indonesia, to assess whether naturally occurring helminth infections were associated with increased shedding of the most common intracellular (Cryptosporidium spp., Isospora spp.) and extracellular (Entamoeba spp., Giardia spp.) microparasites. We also comparatively assessed the statistical correlations of different helminth taxa with microparasite shedding to determine if there were consistent relationships between the specific helminth taxa and microparasites. Helminth infections were associated with increased shedding of both intracellular and extracellular microparasites. Platyhelminthes repeatedly displayed strong positive correlations with several microparasites; while nematodes did not. Our results indicate that helminthes can influence microparasite community shedding dynamics under wild conditions, but that trends may be driven by a narrow range of helminthes.

  13. Variation in hair δ13C and δ15N values in long-tailed macaques (Macaca fascicularis) from Singapore

    Science.gov (United States)

    Schillaci, Michael A.; Castellini, J. Margaret; Stricker, Craig A.; Jones-Engel, Lisa; Lee, Benjamin P.Y.-H.

    2014-01-01

    Much of the primatology literature on stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) has focused on African and New World species, with comparatively little research published on Asian primates. Here we present hair δ13C and δ15N isotope values for a sample of 33 long-tailed macaques from Singapore. We evaluate the suggestion by a previous researcher that forest degradation and biodiversity loss in Singapore have led to a decline in macaque trophic level. The results of our analysis indicated significant spatial variability in δ13C but not δ15N. The range of variation in δ13C was consistent with a diet based on C3 resources, with one group exhibiting low values consistent with a closed canopy environment. Relative to other macaque species from Europe and Asia, the macaques from Singapore exhibited a low mean δ13C value but mid-range mean δ15N value. Previous research suggesting a decline in macaque trophic level is not supported by the results of our study.

  14. SWFSC/MMTD/ETP: Dolphin-Tuna Tracking Studies (DTTS) 1992-1993

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This research was designed to better understand the nature of the dolphin-tuna bond in the eastern tropical Pacific Ocean. In this study, researchers attempted to...

  15. 75 FR 33531 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2010-06-14

    ... DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 635 RIN 0648-XW79 Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries AGENCY: National Marine..., recent Large Pelagics Survey estimates indicate that charter/headboat BFT landings constitute...

  16. Tuna Park Shopping Centre A comparative study of marketing communication tools

    OpenAIRE

    Wongrattanavichit, Teewin; Wang, Haiyan

    2008-01-01

    Date: 2008 June 08 Course: Master thesis Authors: Haiyan Wang, Teewin Wongrattanavichit Tutor: Jan Löwstedt Title: The study of marketing communication effectiveness and customer perception of Tuna Park shopping centre Introduction: The research about the effectiveness of marketing communication tool and customer perception was studied in Tuna Park shopping center, Eskilstuna. The marketing strategy and objective was to compare with the results from the questionnaire in order to measure the e...

  17. CULTURAL MEMORY OF VICTORY OF LAS TUNAS CITY' LODGES FROM 1930 TO 1945 / MEMORIA CULTURAL DE LAS LOGIAS DE VICTORIA DE LAS TUNAS 1930-1945

    Directory of Open Access Journals (Sweden)

    Milena Medina Pérez

    2012-09-01

    Full Text Available The cultural memory of the lodges of Victoria de Las Tunas (1930-1945, it constitutes the topic of the present investigation. The thematic of the lodges has been approached for studious and investigating, not alone of the town but of several parts of the world. Still when these studies exist, the related with the cultural memory of the lodges of the territory, is in the pages of the documents of the time that which leaves to the light starting from this investigation, to show yesterday's Tunas, rich in histories and anecdotes. In the town during the investigated period the lodges Masonic Children of Hiram existed, Vicente García No. 27, the young AJEF, the lodge Teosófica Esperanza, the Children of East No. 54 of the Odd Independent Fellows, the lodge Cucalambé of the Odd United Fellows and the lodge Victoria de Las Tunas No. 78 of the Luz's Order Gentlemen.

  18. Quality Changes of Light Flesh Tuna at Water of Tomini Bay, Gorontalo Province

    Directory of Open Access Journals (Sweden)

    Wila Rumina Nento

    2015-01-01

    Full Text Available Tuna is one of the mainstay fisheries commodities that involve many of the ordinary fishermen. The handling usually still not follows the principles of good handling that causing the poor quality as the result.The aims of this research were to analyze and to determine the quality of tuna meat (the abdominal wall, dorsal fin, and caudal fin. Raw material yellowfin tuna meat prepared for the light, the meat section of the abdominal wall, dorsal fin, and caudal fin. The result of organoleptic analysis showed that the tuna meat was above the minimum value for the criteria of fresh fish. The result of TVB analysis showed that the meat on the caudal fin had the highest value and significantly different with the other, but still exist on the safe limits and on the fresh category. For the result of analysis in histamine, it shown that at the fourth hour the meat at the dorsal fin had the histamine content which were above the minimum that have been recommended. For the result of analysis in peroxide number, it shown that the tuna meat did not sustain the fat damage until the fourth hour after the catching process. And for the result of analysis in TPC, it showed that at the fourth hour the tuna meat on the pectoral fin had the highest number of total colony and significantly different with the other.Keywords: handling, histamine, light flesh, microbiology, yellowfin

  19. Characterization of the Boundary Layer on Full-Scale Bluefin Tuna

    Science.gov (United States)

    Amaral, Brian; Cipolla, Kimberly; Henoch, Charles

    2014-11-01

    The physics that enable tuna to cross large expanses of ocean while feeding and avoiding predators is not presently understood, and could involve complex control of turbulent boundary layer transition and drag reduction. Typical swimming speeds of Bluefin tuna are 1-2 m/s, but can be higher during strong accelerations. The goal of this work is to experimentally determine the approximate lateral location at which transition to turbulence occurs on the tuna for various speeds. The question is whether laminar flow or an advanced propulsion mechanism (or both) allows them to swim at high speeds. Uncertainties include the surface roughness of the skin, local favorable and adverse pressure gradients, and discontinuities such as the open mouth or juncture at the fins. Historically, much of the fluid mechanics work in the area of fish locomotion has focused on vortex shedding issues rather than the boundary layer. Here, the focus is obtaining information on the boundary layer characteristics of a rigid tuna model. A full scale model of a Pacific Bluefin tuna was fabricated using a mold made from an actual deceased tuna, preserving the surface features and details of the appendages. The model was instrumented with 32 wall pressure sensors and experiments performed in a tow tank. Results from flow visualization, drag and wall pressure measurements over a range of speeds and varying angles of attack will be presented.

  20. DAYA SAING EKSPOR TUNA KALENG INDONESIA DI UNI EROPA TAHUN 2003-2013

    Directory of Open Access Journals (Sweden)

    Umar Wahono

    2017-06-01

    Full Text Available Perbedaan tarif yang diberikan antara Indonesia yang lebih tinggi sebesar 20.5% dibandingkan dengan negara pesaing utamanya yang tergabung dalang Africa, Caribbean, Pasific (ACP Countries dengan pelayanan tarif impor hingga 0% ke pasar Uni Eropa (UE. Keadaan ini mampu menyebabkan menghilangnya distorsi perbedaan harga sesungguhnya yang seharusnya menjadi keuntungan lebih atas keunggulan komparatif yang dimiliki. Hal ini mampu melemahkan daya saing komoditi ekspor akibat dampak kenaikan harga terhadap tarif. Penelitian ini bertujuan untuk gambaran daya saing komoditas tuna kaleng Indonesia terhadap negara pesaingnya dipasar UE pada periode 2003-2013. Metode yang digunakan dalam penelitin ini adalah metode Revealed Comparative Advantage (RCA yang kemudian nilai RCA dikomparasikan tiap-tiap negara pengekspor utama tuna kaleng di pasar UE untuk melihat posisi daya saing relatifnya. Sedangkan untuk mendekomposisikan determinan pertumbuhan ekspor tuna kaleng Indonesia ke UE digunankan metode Constant Market Share (CMS. Hasil perhitungan nilai RCA tuna kaleng Indonesia periode 2003-2013 di pasar UE memiliki daya saing dengan rata-rata nilai RCA 4.27. Namun masih dibawah rata-rata nilai RCA negara ACP Countries. Perbedaan pelayanan tarif impor oleh UE untuk komoditas tuna kaleng Indonesia tidak berdampak terhadap penurunan daya saing. The difference between the rates given Indonesia which is higher by 20.5% compared to its main competitor countries that joined the mastermind Africa, Caribbean, Pacific (ACP Countries with service import tariffs to 0% to the European Union (EU. This situation is capable of causing the disappearance of the distortion of the true price difference should be more advantages over comparative advantage. It is capable of undermining the competitiveness of export commodities due to the impact of price increases on tariffs. This study aims to illustrate the competitiveness of commodities Indonesian canned tuna to the EU market of

  1. Effects of MDMA Injections on the Behavior of Socially-Housed Long-Tailed Macaques (Macaca fascicularis.

    Directory of Open Access Journals (Sweden)

    Sébastien Ballesta

    Full Text Available 3,4-methylenedioxy-N-methyl amphetamine (MDMA is one of the few known molecules to increase human and rodent prosocial behaviors. However, this effect has never been assessed on the social behavior of non-human primates. In our study, we subcutaneously injected three different doses of MDMA (1.0, 1.5 or 2.0mg/kg to a group of three, socially housed, young male long-tailed macaques. More than 200 hours of behavioral data were recorded, during 68 behavioral sessions, by an automatic color-based video device that tracked the 3D positions of each animal and of a toy. This data was then categorized into 5 exclusive behaviors (resting, locomotion, foraging, social contact and object play. In addition, received and given social grooming was manually scored. Results show several significant dose-dependent behavioral effects. At 1.5mg/kg only, MDMA induces a significant increase in social grooming behavior, thus confirming the prosocial effect of MDMA in macaques. Additionally, at 1.5 and 2.0 mg/kg MDMA injection substantially decreases foraging behavior, which is consistent with the known anorexigenic effect of this compound. Furthermore, at 2.0 mg/kg MDMA injection induces an increase in locomotor behavior, which is also in accordance with its known stimulant property. Interestingly, MDMA injected at 1.0mg/kg increases the rate of object play, which might be interpreted as a decrease of the inhibition to manipulate a unique object in presence of others, or, as an increase of the intrinsic motivation to manipulate this object. Together, our results support the effectiveness of MDMA to study the complex neurobiology of primates' social behaviors.

  2. Effects of MDMA Injections on the Behavior of Socially-Housed Long-Tailed Macaques (Macaca fascicularis).

    Science.gov (United States)

    Ballesta, Sébastien; Reymond, Gilles; Pozzobon, Matthieu; Duhamel, Jean-René

    2016-01-01

    3,4-methylenedioxy-N-methyl amphetamine (MDMA) is one of the few known molecules to increase human and rodent prosocial behaviors. However, this effect has never been assessed on the social behavior of non-human primates. In our study, we subcutaneously injected three different doses of MDMA (1.0, 1.5 or 2.0mg/kg) to a group of three, socially housed, young male long-tailed macaques. More than 200 hours of behavioral data were recorded, during 68 behavioral sessions, by an automatic color-based video device that tracked the 3D positions of each animal and of a toy. This data was then categorized into 5 exclusive behaviors (resting, locomotion, foraging, social contact and object play). In addition, received and given social grooming was manually scored. Results show several significant dose-dependent behavioral effects. At 1.5mg/kg only, MDMA induces a significant increase in social grooming behavior, thus confirming the prosocial effect of MDMA in macaques. Additionally, at 1.5 and 2.0 mg/kg MDMA injection substantially decreases foraging behavior, which is consistent with the known anorexigenic effect of this compound. Furthermore, at 2.0 mg/kg MDMA injection induces an increase in locomotor behavior, which is also in accordance with its known stimulant property. Interestingly, MDMA injected at 1.0mg/kg increases the rate of object play, which might be interpreted as a decrease of the inhibition to manipulate a unique object in presence of others, or, as an increase of the intrinsic motivation to manipulate this object. Together, our results support the effectiveness of MDMA to study the complex neurobiology of primates' social behaviors.

  3. Impacts of late Quaternary environmental change on the long-tailed ground squirrel (Urocitellus undulatus) in Mongolia.

    Science.gov (United States)

    McLean, Bryan S; Nyamsuren, Batsaikhan; Tchabovsky, Andrey; Cook, Joseph A

    2018-03-08

    Impacts of Quaternary environmental changes on mammal faunas of central Asia remain poorly understood due to a lack of geographically comprehensive phylogeographic sampling for most species. To help address this knowledge gap, we conducted the most extensive molecular analysis to date of the long-tailed ground squirrel (Urocitellus undulatus Pallas 1778) in Mongolia, a country that comprises the southern core of this species' range. Drawing on material from recent collaborative field expeditions, we genotyped 128 individuals at 2 mitochondrial genes (cytochrome b and cytochrome oxidase I; 1 797 bp total). Phylogenetic inference supports the existence of two deeply divergent infraspecific lineages (corresponding to subspecies U. u. undulatus and U. u. eversmanni), a result in agreement with previous molecular investigations but discordant with patterns of range-wide craniometric and external phenotypic variation. In the widespread western eversmanni lineage, we recovered geographically-associated clades from the: (a) Khangai, (b) Mongolian Altai, and (c) Govi Altai mountain ranges. Phylogeographic structure in U. u. eversmanni is consistent with an isolation-by-distance model; however, genetic distances are significantly lower than among subspecies, and intra-clade relationships are largely unresolved. The latter patterns, as well as the relatively higher nucleotide polymorphism of populations from the Great Lakes Depression of northwestern Mongolia, suggest a history of range shifts into these lowland areas in response to Pleistocene glaciation and environmental change, followed by upslope movements and mitochondrial lineage sorting with Holocene aridification. Our study illuminates possible historical mechanisms responsible for U. undulatus genetic structure and contributes to a framework for ongoing exploration of mammalian response to past and present climate change in central Asia.

  4. Phylogenetic relationships of Malaysia’s long-tailed macaques, Macaca fascicularis, based on cytochrome b sequences

    Science.gov (United States)

    Abdul-Latiff, Muhammad Abu Bakar; Ruslin, Farhani; Fui, Vun Vui; Abu, Mohd-Hashim; Rovie-Ryan, Jeffrine Japning; Abdul-Patah, Pazil; Lakim, Maklarin; Roos, Christian; Yaakop, Salmah; Md-Zain, Badrul Munir

    2014-01-01

    Abstract Phylogenetic relationships among Malaysia’s long-tailed macaques have yet to be established, despite abundant genetic studies of the species worldwide. The aims of this study are to examine the phylogenetic relationships of Macaca fascicularis in Malaysia and to test its classification as a morphological subspecies. A total of 25 genetic samples of M. fascicularis yielding 383 bp of Cytochrome b (Cyt b) sequences were used in phylogenetic analysis along with one sample each of M. nemestrina and M. arctoides used as outgroups. Sequence character analysis reveals that Cyt b locus is a highly conserved region with only 23% parsimony informative character detected among ingroups. Further analysis indicates a clear separation between populations originating from different regions; the Malay Peninsula versus Borneo Insular, the East Coast versus West Coast of the Malay Peninsula, and the island versus mainland Malay Peninsula populations. Phylogenetic trees (NJ, MP and Bayesian) portray a consistent clustering paradigm as Borneo’s population was distinguished from Peninsula’s population (99% and 100% bootstrap value in NJ and MP respectively and 1.00 posterior probability in Bayesian trees). The East coast population was separated from other Peninsula populations (64% in NJ, 66% in MP and 0.53 posterior probability in Bayesian). West coast populations were divided into 2 clades: the North-South (47%/54% in NJ, 26/26% in MP and 1.00/0.80 posterior probability in Bayesian) and Island-Mainland (93% in NJ, 90% in MP and 1.00 posterior probability in Bayesian). The results confirm the previous morphological assignment of 2 subspecies, M. f. fascicularis and M. f. argentimembris, in the Malay Peninsula. These populations should be treated as separate genetic entities in order to conserve the genetic diversity of Malaysia’s M. fascicularis. These findings are crucial in aiding the conservation management and translocation process of M. fascicularis populations

  5. JENIS, UKURAN DAN DAERAH PENANGKAPAN HIU THRESHER (FAMILI ALOPIIDAE YANG TERTANGKAP RAWAI TUNA DI SAMUDERA HINDIA

    Directory of Open Access Journals (Sweden)

    Agustinus Anung Widodo

    2016-03-01

    Full Text Available Sebagai anggota Indian Ocean Tuna Commision (IOTC Indonesia wajib mengadopsi isi Resolusi IOTC 10/12 yang mengatur pengelolaan sumberdaya ikan hiu thresher (famili Alopiidae. Secara spesifik Indonesia belum melaksanakan pengelolaan sumberdaya hiu thresher karena spesies tersebut belum mendapatkan perhatian serius. Tulisan ini bermaksud menyampaikan hasil penelitian tentang ikan hiu thresher (Famili Alopiidae yang tertangkap rawai tuna di Samudera Hindia berbasis di Cilacap. Data diperoleh dari kegiatan pengambilan contoh di pelabuhan tahun 2010, kegiatan observasi di atas kapal rawai tuna bulan Januari 2010 dan laporan statistik PPS Cilacap tahun 2006-2010. Hasil kajian menunjukkan bahwa: (a di perairan Indonesia ada dua spesies dari tiga spesies hiu thresher yang ada di dunia, yaitu hiu monyet atau pelagic thresher (Alopias pelagicus Nakamura 1935 dan hiu paitan atau bigeye thresher (A. superciliosus Lowe 1840. Satu spesies lainnya yang belum pernah ditemukan adalah thinfin thresher (A.vulpinus Bonnaterre1788.  Dilihat dari teknologi rawai tuna yang digunakan, daerah sebaran hiu thresher sama dengan tuna di Samudera Hindia, sehingga sulit untuk menghindari tidak tertangkapnya hiu thresher oleh rawai tuna. Jumlah dari jenis hiu monyet yang tertangkap rawai tuna di Samudera Hindia berkisar 0,1-0,6 % dan hiu paitan berkisar 0,1-1,3 % dari total tangkapan. Ukuran hiu thresher yang tertangkap rawai tuna umumnya ikan yang telah dewasa (berkisar 54-74% dan diduga telah mengalami pemijahan. Hampir semua bagian hiu thresher dimanfaatkan sebagai bahan pangan dan farmasi. Selain dipasarkan di dalam negeri, ikan hiu thresher juga diekspor terutama siripnya ke manca negara dan terbanyak ke China.   As a member of IOTC, Indonesia is obliged to implement all IOTC’s resolutions including resolution 10/12 on the conservation of thresher sharks (Family Alopiidae caught in association with fisheries in the IOTC area of competence. Indonsia has not

  6. Projections of climate-driven changes in tuna vertical habitat based on species-specific differences in blood oxygen affinity.

    Science.gov (United States)

    Mislan, K A S; Deutsch, Curtis A; Brill, Richard W; Dunne, John P; Sarmiento, Jorge L

    2017-10-01

    Oxygen concentrations are hypothesized to decrease in many areas of the ocean as a result of anthropogenically driven climate change, resulting in habitat compression for pelagic animals. The oxygen partial pressure, pO 2 , at which blood is 50% saturated (P 50 ) is a measure of blood oxygen affinity and a gauge of the tolerance of animals for low ambient oxygen. Tuna species display a wide range of blood oxygen affinities (i.e., P 50 values) and therefore may be differentially impacted by habitat compression as they make extensive vertical movements to forage on subdaily time scales. To project the effects of end-of-the-century climate change on tuna habitat, we calculate tuna P 50 depths (i.e., the vertical position in the water column at which ambient pO 2 is equal to species-specific blood P 50 values) from 21st century Earth System Model (ESM) projections included in the fifth phase of the Climate Model Intercomparison Project (CMIP5). Overall, we project P 50 depths to shoal, indicating likely habitat compression for tuna species due to climate change. Tunas that will be most impacted by shoaling are Pacific and southern bluefin tunas-habitat compression is projected for the entire geographic range of Pacific bluefin tuna and for the spawning region of southern bluefin tuna. Vertical shifts in P 50 depths will potentially influence resource partitioning among Pacific bluefin, bigeye, yellowfin, and skipjack tunas in the northern subtropical and eastern tropical Pacific Ocean, the Arabian Sea, and the Bay of Bengal. By establishing linkages between tuna physiology and environmental conditions, we provide a mechanistic basis to project the effects of anthropogenic climate change on tuna habitats. Published 2017. This article is a U.S. Government work and is in the public domain in the USA.

  7. Notes on helminth parasites of tuna fishes (Scombridae in Brazil Notas sobre los helmintos parásitos del atún (Scombridae en Brasil

    Directory of Open Access Journals (Sweden)

    Márcia Cristina Nascimento-Justo

    2012-03-01

    Full Text Available Four species of Scombridae from the coast of Rio de Janeiro, southwest Atlantic Ocean were found to be parasitized with species of Didymozoidae (Digenea: Thunnus atlanticus (Lesson a new host record for Nephrodidymotrema ahi Yamaguti, 1970, Didymocystis neothunni (Yamaguti, 1970, and Didymozoon longicolle (Yamaguti, 1970; Thunnus obesus (Lowe parasitized by Didymozoon longicolle and reported as a new host for Nephrodidymotrema ahi; Thunnus albacares (Bonaterre parasitized by Nephrodidymotrema ahi, and Katsuwonus pelamis (Linnaeus by Didymozoon longicolle. Measurements, figures, and parameters of infection are presented.Cuatro especies de Scombridae de la costa de Río de Janeiro, suroeste del océano Atlántico, se reportan parasitados con diferentes especies de Didymozoidae (Digenea: Thunnus atlanticus (Lesson un registro de nuevo huésped para Nephrodidymotrema ahi Yamaguti, 1970, Didymocystis neothunni (Yamaguti, 1970 y para Didymozoon longicolle (Yamaguti, 1970; Thunnus obesus (Lowe parasitado por Didymozoon longicolle, se indica como nuevo huésped para Nephrodidymotrema ahi; Thunnus albacares (Bonaterre parasitados por Nephrodidymotrema ahi y Katsuwonus pelamis (Linnaeus por Didymozoon longicolle. Se presentan las mediciones, las figuras y los parámetros de la infección.

  8. Mercury in canned tuna marketed in Cartagena, Colombia, and estimation of human exposure.

    Science.gov (United States)

    Alcala-Orozco, Maria; Morillo-Garcia, Yenifer; Caballero-Gallardo, Karina; Olivero-Verbel, Jesus

    2017-12-01

    The presence of mercury in tuna is ubiquitous, so national authorities should guarantee food safety of canned tuna available on the market, according to legal regulations. The objective of this survey was to assess total mercury (T-Hg) levels in brands of canned tuna marketed in Cartagena, Colombia, and determine fish consumption-based risks after ingestion. For that purpose, 252 cans of tuna were collected, representing 6 brands (A-F), in 2 mediums (water and oil). Mean T-Hg levels were 0.66 ± 0.05 and 0.61 ± 0.05 µg g -1 wet weight, for water and oil, respectively. High T-Hg concentrations were measured in brands B and D. Only brands E and F guaranteed low risk for Hg-related health problems. According to Colombia's legislation, 15.5% of the samples exceeded the maximum level of 1.0 µg g -1 for mercury and 18.3% was higher than limits as recommended by Food and Agriculture Organization/World Health Organisation (0.5 µg g -1 ). It was concluded that consumption of canned tuna could represent a high risk for the Colombian population, particularly to vulnerable groups.

  9. Effects of frozen storage on survival of Staphylococcus aureus and enterotoxin production in precooked tuna meat.

    Science.gov (United States)

    Wu, Xulei; Su, Yi-Cheng

    2014-08-01

    This study investigated the survival of Staphylococcus aureus in precooked tuna meat for producing canned products during frozen storage (-20 ± 2 °C) as well as its growth and enterotoxin production at 35 to 37 °C after the storage. Samples (50 ± 5 g) of precooked albacore (loin, chunk, and flake) and skipjack (chunk and flake) tuna were inoculated with 5 enterotoxin-producing strains of S. aureus at a level of approximately 3.5 log CFU/g and individually packed in a vacuum bag after 3 h incubation at 35 to 37 °C. Vacuum-packed samples were stored in a freezer (-20 ± 2 °C) for 4 wk. The frozen samples were then thawed in 37 °C circulating water for 2 h and incubated at 35 to 37 °C for 22 h. Populations of S. aureus in all precooked tuna samples decreased slightly (canned tuna within 6 to 8 h of thawing to avoid product spoilage and potential enterotoxin production by S. aureus in contaminated precooked tuna meat. © 2014 Institute of Food Technologists®

  10. Modelling the spatial behaviour of a tropical tuna purse seine fleet.

    Directory of Open Access Journals (Sweden)

    Tim K Davies

    Full Text Available Industrial tuna fisheries operate in the Indian, Atlantic and Pacific Oceans, but concerns over sustainability and environmental impacts of these fisheries have resulted in increased scrutiny of how they are managed. An important but often overlooked factor in the success or failure of tuna fisheries management is the behaviour of fishers and fishing fleets. Uncertainty in how a fishing fleet will respond to management or other influences can be reduced by anticipating fleet behaviour, although to date there has been little research directed at understanding and anticipating the human dimension of tuna fisheries. The aim of this study was to address gaps in knowledge of the behaviour of tuna fleets, using the Indian Ocean tropical tuna purse seine fishery as a case study. We use statistical modelling to examine the factors that influence the spatial behaviour of the purse seine fleet at broad spatiotemporal scales. This analysis reveals very high consistency between years in the use of seasonal fishing grounds by the fleet, as well as a forcing influence of biophysical ocean conditions on the distribution of fishing effort. These findings suggest strong inertia in the spatial behaviour of the fleet, which has important implications for predicting the response of the fleet to natural events or management measures (e.g., spatial closures.

  11. Génesis de la medicina familiar en Las Tunas

    Directory of Open Access Journals (Sweden)

    Maritza Rodríguez Peña

    2014-08-01

    Full Text Available Se realizó una investigación desde los presupuestos de la historia social integral, con el objetivo de analizar momentos importantes de la historia de la medicina familiar en la localidad de Las Tunas. Para la investigación se consultaron diversas fuentes documentales, orales, iconográficas, patrimoniales y bibliográficas, entre ellas la obra de los historiadores de la ciudad y del Ministerio de Salud Pública, así como resultados científicos de proyectos de investigación. Los métodos empleados partieron de la observación, el análisis histórico-lógico, la síntesis, la inducción y la deducción de la información, que permitieron la sistematización y determinación de los momentos más importantes de este proceso desde su origen en la comunidad primitiva, transitando por diferentes etapas hasta 1984, con la puesta en práctica del Programa del Médico y la Enfermera de la Familia, para el fortalecimiento de la atención primaria de salud, con marcado acento preventivo

  12. Transcriptome markers of viral persistence in naturally-infected andes virus (bunyaviridae seropositive long-tailed pygmy rice rats.

    Directory of Open Access Journals (Sweden)

    Corey L Campbell

    Full Text Available Long-tailed pygmy rice rats (Oligoryzomys longicaudatus are principal reservoir hosts of Andes virus (ANDV (Bunyaviridae, which causes most hantavirus cardiopulmonary syndrome cases in the Americas. To develop tools for the study of the ANDV-host interactions, we used RNA-Seq to generate a de novo transcriptome assembly. Splenic RNA from five rice rats captured in Chile, three of which were ANDV-infected, was used to generate an assembly of 66,173 annotated transcripts, including noncoding RNAs. Phylogenetic analysis of selected predicted proteins showed similarities to those of the North American deer mouse (Peromyscus maniculatus, the principal reservoir of Sin Nombre virus (SNV. One of the infected rice rats had about 50-fold more viral burden than the others, suggesting acute infection, whereas the remaining two had levels consistent with persistence. Differential expression analysis revealed distinct signatures among the infected rodents. The differences could be due to 1 variations in viral load, 2 dimorphic or reproductive differences in splenic homing of immune cells, or 3 factors of unknown etiology. In the two persistently infected rice rats, suppression of the JAK-STAT pathway at Stat5b and Ccnot1, elevation of Casp1, RIG-I pathway factors Ppp1cc and Mff, and increased FC receptor-like transcripts occurred. Caspase-1 and Stat5b activation pathways have been shown to stimulate T helper follicular cell (TFH development in other species. These data are also consistent with reports suggestive of TFH stimulation in deer mice experimentally infected with hantaviruses. In the remaining acutely infected rice rat, the apoptotic pathway marker Cox6a1 was elevated, and putative anti-viral factors Abcb1a, Fam46c, Spp1, Rxra, Rxrb, Trmp2 and Trim58 were modulated. Transcripts for preproenkephalin (Prenk were reduced, which may be predictive of an increased T cell activation threshold. Taken together, this transcriptome dataset will permit rigorous

  13. Leaching of Oil from Tuna Fish Liver by Using Solvent of Methyl-Ethyl Ketone

    Directory of Open Access Journals (Sweden)

    Mirna Rahmah Lubis

    2013-12-01

    Full Text Available Research of oil leaching from Tuna Fish Liver has been carried out by extracting of tuna fish liver in soxhlet by using methyl-ethyl ketone as solvent. Liver of fresh tuna fish is blended, put into soxhlet, and extracted at temperatures of 60oC, 65oC, 70oC, 75oC, and 80oC. After obtaining the oil, separation between solvent and oil is carried out by distillation. Oil obtained is analyzed by testing the yield, acid number, Iodine value, viscosity, and its impurities content. Yield obtained is influenced by temperature and time of leaching. Both variables indicates that the higher the variables, the more fish liver oil obtained. Maximum yield obtained is 25.552% at operating condition of leaching temperature 80oC, and leaching duration of 5 hours.

  14. Autolytic degradation of skipjack tuna during heating as affected by initial quality and processing conditions.

    Science.gov (United States)

    Stagg, Nicola J; Amato, Penny M; Giesbrecht, Francis; Lanier, Tyre C

    2012-02-01

    Several factors were studied as affecting protein degradation and texture of skipjack tuna muscle following ambient pressure thermal processing (precooking). These included degree of mushy tuna syndrome (MTS) evidenced in the raw meat, raw meat pH, abusive thawing/holding, and precooking temperature/time. Slurries and intact pieces from frozen skipjack tuna, either tempered for 2 h or thawed and held at 25 °C for 22 h (abusive treatment) were heated at temperatures ranging from 40 to 80 °C for up to 2 h, and also at 90 °C for 1 h, with or without prior adjustment of pH to 5 or 7 to favor cathepsin or calpain activity, respectively. Proteolysis of precooked samples was monitored by Lowry assay and SDS-PAGE; cooked texture of intact meat was measured using a Kramer shear press and by sensory profile analysis. Proteolysis maximally occurred in slurries of skipjack tuna muscle that had been abusively stored (22 h at 25 °C) and adjusted to pH 5 prior to heating at 55 °C. Intact pieces of tuna abusively thawed/held for 22 h with subsequent heating at 55 °C also evidenced the most proteolysis and were the least firm in texture. Raw fish that evidenced higher severity of MTS when raw displayed higher levels of proteolysis prior to cooking, which were further increased after cooking at 55 °C. The kinetic data presented here can be used to optimize processing conditions for skipjack tuna canning to minimize textural degradation and optimize quality. © 2012 Institute of Food Technologists®

  15. Reducing the Bitterness of Tuna (Euthynnus pelamis) Dark Meat with Lactobacillus casei subsp. casei ATCC 393

    OpenAIRE

    Ernani S. Sant’Anna; Luiz H. Beirão; Fabiano Cleber Bertoldi

    2004-01-01

    During the process of canning tuna fish, considerable amounts of dark tuna meat are left over because of its bitterness, which are then used in the production of animal food. Fermentation with Lactobacillus casei subsp. casei ATCC 393 was used as an alternative to reduce this bitter taste. Samples of meat were prepared, vacuum packed and then stored at –18 °C. The frozen dark meat was used immediately after defrosting and the experiment was carried out with 2 and 4 % of NaCl with the addition...

  16. Synthesis of Monoacylglycerol Rich in Polyunsaturated Fatty Acids from Tuna Oil with Immobilized Lipase AK

    DEFF Research Database (Denmark)

    Pawongrat, Ratchapol; Xu, Xuebing; H-Kittikun, Aran

    2007-01-01

    The aim of this study was to produce monoacylglycerols (MAG) rich in polyunsaturated fatty acids (PUFA), especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), by glycerolysis of tuna oil with lipase AK from Pseudomonas fluorescence immobilized on Accurel EP-100 (IM-AK). tert...... on tuna oil. The temperature was controlled at 45 degrees C. Under these conditions, with a 24 h reaction, the yield of MAG was 24.6%, but containing 56.0 wt% PUFA (EPA and DHA). Stability of the IM-AK was also studied. The hydrolytic activity of the enzyme remained at 88% and 80% of initial activity...

  17. The concentration and variability of selenium and mercury measured in vacuum-packed tuna fish

    International Nuclear Information System (INIS)

    Brockman, J.D.; Sharp, N.; Ngwenyama, R.A.; Shelnutt, L.D.; McElroy, J.A.

    2009-01-01

    Methylmercury (meHg) is a known toxin commonly found in fish. Fish is also a rich source of the trace nutrient selenium which has been hypothesized to modify the toxicity of meHg. We analyzed 28 samples of commercially packaged albacore and light tuna fish for selenium and mercury using standard comparator instrumental neutron activation analysis. Significant differences in the concentration of mercury and selenium were associated with the type of fish, brand and batch. Fish consumers should vary the brand of tuna fish to avoid routine consumption of a brand high in mercury. (author)

  18. A comparative study of thermal calcination and an alkaline hydrolysis method in the isolation of hydroxyapatite from Thunnus obesus bone

    International Nuclear Information System (INIS)

    Venkatesan, Jayachandran; Ryu, BoMi; Thomas, Noel Vinay; Kim, Se Kwon; Qian Zhongji

    2011-01-01

    In the present study, hydroxyapatite (HAp) was isolated from Thunnus obesus bone using alkaline hydrolysis and thermal calcination methods. The obtained ceramic has been characterized by thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), powder x-ray diffraction analysis (XRD), field-emission scanning electron microscopy, energy-dispersive x-ray analysis, transmission electron microscopy (TEM), selected area diffraction analysis, cytotoxic analysis and cell proliferation analysis. The results indicate that there are significant differences between the ceramics and T. obesus bone. FT-IR and TGA results affirmed that the collagen and organic moieties have been eliminated by both the proposed methods. XRD results were in agreement with JCPDS data. TEM and selective area diffraction images have signified that the thermal calcination method produces good crystallinity with dimensions 0.3-1.0 μm, whereas the alkaline hydrolysis method produces nanostructured HAp crystals with 17-71 nm length and 5-10 nm width. Biocompatibility of HAp crystals was evaluated by cytotoxicity and cell proliferation with human osteoblast-like cell MG-63.

  19. A comparative study of thermal calcination and an alkaline hydrolysis method in the isolation of hydroxyapatite from Thunnus obesus bone

    Energy Technology Data Exchange (ETDEWEB)

    Venkatesan, Jayachandran; Ryu, BoMi; Thomas, Noel Vinay; Kim, Se Kwon [Department of Chemistry, Pukyong National University, Busan 608-737 (Korea, Republic of); Qian Zhongji, E-mail: sknkim@pknu.ac.kr [Marine Bioprocess Research Center, Pukyong National University, Busan 608-737 (Korea, Republic of)

    2011-06-15

    In the present study, hydroxyapatite (HAp) was isolated from Thunnus obesus bone using alkaline hydrolysis and thermal calcination methods. The obtained ceramic has been characterized by thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), powder x-ray diffraction analysis (XRD), field-emission scanning electron microscopy, energy-dispersive x-ray analysis, transmission electron microscopy (TEM), selected area diffraction analysis, cytotoxic analysis and cell proliferation analysis. The results indicate that there are significant differences between the ceramics and T. obesus bone. FT-IR and TGA results affirmed that the collagen and organic moieties have been eliminated by both the proposed methods. XRD results were in agreement with JCPDS data. TEM and selective area diffraction images have signified that the thermal calcination method produces good crystallinity with dimensions 0.3-1.0 {mu}m, whereas the alkaline hydrolysis method produces nanostructured HAp crystals with 17-71 nm length and 5-10 nm width. Biocompatibility of HAp crystals was evaluated by cytotoxicity and cell proliferation with human osteoblast-like cell MG-63.

  20. Reducing the Bitterness of Tuna (Euthynnus pelamis Dark Meat with Lactobacillus casei subsp. casei ATCC 393

    Directory of Open Access Journals (Sweden)

    Ernani S. Sant’Anna

    2004-01-01

    Full Text Available During the process of canning tuna fish, considerable amounts of dark tuna meat are left over because of its bitterness, which are then used in the production of animal food. Fermentation with Lactobacillus casei subsp. casei ATCC 393 was used as an alternative to reduce this bitter taste. Samples of meat were prepared, vacuum packed and then stored at –18 °C. The frozen dark meat was used immediately after defrosting and the experiment was carried out with 2 and 4 % of NaCl with the addition of 2 and 4 % of glucose, respectively. The dark tuna meat was inoculated with lactic acid bacteria (LAB and fermented at 10 °C for 30 days. The fermentation process was monitored through bacteriological and chemical analyses, when an increase of acidity and the corresponding decrease of pH were observed due to the prevalence of LAB. Sensorial analysis, using a test of multiple comparison, was carried out with pastes of fermented dark tuna meat and presented a significant difference when compared to the paste control, indicating the reduction of bitter taste.

  1. Microbiological quality and safety of Skipjack tuna loins (Katsuwonus Pelamis intented for canning

    Directory of Open Access Journals (Sweden)

    Francesco Casalinuovo

    2018-03-01

    Full Text Available Tuna is a food widely consumed fresh and canned as well. After catching and filleting, a pre-cooking step is normally followed by freezing and shipping to canning industry as loins. The aim of this paper was to assess the microbiological quality and safety of tuna loins (50 samples imported by an Italian canned tuna producer from two different FAO fishing areas. Total bacterial count (TBC, Coliforms, Enterobacteriaceae, Escherichia coli, Listeria monocytogenes, Salmonella, Staphylococcus aureus, Vibrio parahaemolyticus, Vibrio cholera, pH measurement, S. aureus enterotoxin and histamine levels were evaluated. Significant differences were evidenced for TBC, Enterobacteriaceae, E. coli, Coliforms and pH between fishing areas. Staphylococcus aureus was detected in all the samples tested at 1 to 3 Log cfu/g; Staphylococcus warneri, S. saprophyticus, S. epidermidis, S. hominis, S. intermedius, S. vitulinus and S. sciuri were also identified. Listeria monocytogenes, Salmonella, Vibrio parahaemolyticus, Vibrio cholera and Staphylococcus aureus enterotoxin were not detected. Histamine ranged between 0 to 5 mg/kg. The tuna loins analysed in this paper have to be considered safe; staphylococci presence represents a possible concern and has to been taken in account when risk analysis is carried out.

  2. Gender Transformations and Colonial Displacements in Laura Antillano's "Tuna de mar"

    Science.gov (United States)

    Reid, Alana

    2015-01-01

    This paper examines the trajectories of two characters in Laura Antillano's short story, "Tuna de mar" (1991), as they navigate interrelated systems of power and attempt to position themselves closer to, or further away from, the margins. Set in the late eighteenth century, the tale features a female protagonist who escapes prostitution…

  3. Nisin Migration in Shelf Stable, Tuna-Filled Tortillas During Storage

    Science.gov (United States)

    2014-09-22

    INGREDIENTS AND PROCESSING ..........................................................................4 2.4 TUNA WRAP STORAGE...Leung, 1986 and Taub, 2003), meat (Pavey, 1972; Powers, 1981; Yang, 1997 and Richardson, 1995), seafood (Dymsza, 1979), eggs (Richardson, 2008 and...Incorporation of Preservatives, such as nitrites and antioxidants. (4) Thermal pasteurization by baking. (5) Appropriate Packaging, such as the

  4. 77 FR 19175 - Atlantic Highly Migratory Species; 2012 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2012-03-30

    ...). Attachments to electronic comments will be accepted in Microsoft Word or Excel, WordPerfect, or Adobe PDF file... active member of the International Commission for the Conservation of Atlantic Tunas (ICCAT), the United States implements binding ICCAT recommendations to comply with this international treaty. ATCA authorizes...

  5. 78 FR 2273 - Canned Tuna Deviating From Identity Standard; Temporary Permit for Market Testing

    Science.gov (United States)

    2013-01-10

    ... introduces or causes the introduction of one or more of the test products into interstate commerce, but not... permit covers limited interstate marketing tests of products identified as ``no drain canned tuna... permit provides for the temporary marketing of a total 533,333 cases of 12 x 4 ounce cans (totaling 6.4...

  6. Biogenic amine content, histamine-forming bacteria, and adulteration of pork in tuna sausage products.

    Science.gov (United States)

    Kung, Hsien-Feng; Tsai, Yung-Hsiang; Chang, Shih-Chih; Hong, Tang-Yao

    2012-10-01

    Twenty-five tuna sausage products were purchased from retail markets in Taiwan. The rates of occurrence of biogenic amines, histamine-forming bacteria, and adulteration by pork and poultry were determined. The average content of various biogenic amines in all tested samples was less than 2.0 mg/100 g (Makaira nigricans (blue marlin).

  7. CONCENTRATION AND RECOVERY OF PROTEIN FROM TUNA COOKING JUICE BY FORWARD OSMOSIS

    Directory of Open Access Journals (Sweden)

    KHONGNAKORN W.

    2016-07-01

    Full Text Available Tuna cooking processing plants generate large amount of cooking juice containing a significant content of protein. Recovery and concentrating process of this valuable compound together with a low energy consumption process are of interest regarding full utilization concept and green process approach. Forward osmosis (FO was employed in this work to recover and concentrate tuna cooking juice. FO process could increase the protein concentration up to 9% with an average permeate flux of 2.54 L/m2h. The permeate flux however tended to decrease as protein concentration increased due to the impact of osmotic pressure of the feed and fouling on the membrane surface. Since tuna cooking juice consists of protein and minerals, membrane analyses indicated that fouling was more severe compared to the fouling caused by standard bovine serum albumin pure protein. However, the presence of minerals rendered it a quicker and lower energy process by comparison. These results indicated that FO is a promising technique in the recovery and concentration of tuna cooking juice protein.

  8. V ITER chrání zimu tuna stříbra

    Czech Academy of Sciences Publication Activity Database

    Řípa, Milan

    Říjen (2016) ISSN 2464-7888 Institutional support: RVO:61389021 Keywords : fusion * tokamak * ITER * thermal shield * silver * superconductivity Subject RIV: BL - Plasma and Gas Discharge Physics http://www.3pol.cz/cz/rubriky/jaderna-fyzika-a-energetika/1922-v-iter-chrani-zimu-tuna-stribra

  9. 77 FR 21015 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2012-04-09

    ... DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 635 [Docket No. 110210132-1275-02] RIN 0648-XB116 Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries AGENCY... to their ability to attract customers. In addition, 2011 Large Pelagics Survey estimates indicate...

  10. 78 FR 20258 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2013-04-04

    ... DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 635 [Docket No. 120306154-2241-02] RIN 0648-XC593 Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries AGENCY... retention limit is vital to their ability to attract customers. In addition, 2012 Large Pelagics Survey...

  11. 76 FR 18416 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries

    Science.gov (United States)

    2011-04-04

    ... DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration 50 CFR Part 635 [Docket No. 100317152-0176-01] RIN 0648-XA327 Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Fisheries AGENCY... ability to attract customers. In addition, recent Large Pelagics Survey estimates indicate that charter...

  12. Closing the Incentive Gap: The Role of Public and Private Actors in Governing Indonesia's Tuna Fisheries

    NARCIS (Netherlands)

    Bailey, M.L.; Miller, A.M.M.; Bush, S.R.; Zwieten, van P.A.M.; Wiryawan, B.

    2016-01-01

    Indonesia is one of the world's largest tuna producing countries, yet regulatory oversight remains weak and management is poor. Incentive-based approaches are a way to improve state-based resource management, but they often require strong government regulation. In this paper, we use principal–agent

  13. Quantitative analysis on dose to humans as a result of consuming tuna fish contaminated by cesium radionuclides

    International Nuclear Information System (INIS)

    Khani, J.; Donev, J.M.K.C.

    2014-01-01

    Quantitative empirical data is presented on the dose exposure to North Americans consuming tuna fish that have accumulated concentrations of radioactive isotopes. The two particular radioactive isotopes of interest are cesium-137 and cesium-134. Though biological effects of radiation are a widely debatable topic, the consumption of tuna fish does not support significant increased risk of cancer to humans. An important comparison is made between the elevated levels of radioactive cesium concentrations to naturally occurring radionuclides, namely potassium-40 and polonium-210. It is calculated that naturally occurring radioactive isotopes are in the orders of magnitude greater than the cesium radionuclides in tuna fish. (author)

  14. Quantitative analysis on dose to humans as a result of consuming tuna fish contaminated by cesium radionuclides

    Energy Technology Data Exchange (ETDEWEB)

    Khani, J.; Donev, J.M.K.C., E-mail: jykhani@ucalgary.ca, E-mail: jason.donev@ucalgary.ca [Univ. of Calgary, Calgary, AB (Canada)

    2014-07-01

    Quantitative empirical data is presented on the dose exposure to North Americans consuming tuna fish that have accumulated concentrations of radioactive isotopes. The two particular radioactive isotopes of interest are cesium-137 and cesium-134. Though biological effects of radiation are a widely debatable topic, the consumption of tuna fish does not support significant increased risk of cancer to humans. An important comparison is made between the elevated levels of radioactive cesium concentrations to naturally occurring radionuclides, namely potassium-40 and polonium-210. It is calculated that naturally occurring radioactive isotopes are in the orders of magnitude greater than the cesium radionuclides in tuna fish. (author)

  15. HASIL TANGKAP SAMPINGAN (HTS KAPAL RAWAI TUNA DI SAMUDERA HINDIA YANG BERBASIS DI BENOA

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2016-05-01

    Full Text Available Hasil tangkap sampingan (HTS hampir terdapat pada semua jenis perikanan tangkap di Indonesia, termasuk pada perikanan rawai tuna di Samudera Hindia. Kebanyakan jenis HTS merupakan spesies yang tidak diinginkan atau jenis ikan target tapi ukurannya di bawah standar yang diinginkan (yuwana atau ikan muda dan pada kasus tertentu merupakan jenis ikan yang terancam keberadaannya (Endangered species. Penelitian ini bertujuan untuk memberikan informasi tentang komposisi hasil tangkap sampingan, laju pancing dan hubungan antara tuna dengan ikan yang berasosiasi dengannya pada area penangkapan yang sama. Pengamatan dilakukan pada bulan Maret – Juli 2010 dengan mengikuti kegiatan operasi penangkapan 2 kapal rawai tuna komersial yang berbasis di Pelabuhan Benoa. Hasil penelitian menunjukkan terdapat 18 jenis hasil tangkap sampingan yang  didominasi dari family Alepisauridae; ikan naga (Alepisaurus sp.; Gempylidae; ikan gindara (oilfish, dan Dasyatidae; pari lumpur (Dasyatis spp.. Jenis ikan lain adalah ikan paruh panjang (billfish, berbagai jenis cucut dan pari, ikan teleostei, serta penyu lekang. Kebanyakan dari hasil tangkap sampingan merupakan by-product yang mempunyai nilai ekonomis tinggi kecuali jenis ikan naga dan pari lumpur yang merupakan discard/buangan.   By-catch products are mostly available in every kind of capture fisheries in Indonesia including tuna longline fisheries in Indian Ocean. Most of these are unwanted species or juvenile target fish, sometimes endangered species. The research intended to reveal the by-catch from tuna fisheries and its relationship between tuna and its associate in the same fishing ground. Surveillance was conducted on March – July, 2010 by following two commercial tuna longliners vessel based in Port of Benoa. The result showed that there were 18 by-catch species that managed to be retrieved and indentified, family Alepisauridae; lancetfish (Alepisaurus sp.; Gempylidae; oilfish (Ruvettus pretiosus, and

  16. Trans-equatorial migration routes, staging sites and wintering areas of a high-Arctic avian predator: the long-tailed Skua (Stercorarius longicaudus).

    Science.gov (United States)

    Gilg, Olivier; Moe, Børge; Hanssen, Sveinn Are; Schmidt, Niels Martin; Sittler, Benoît; Hansen, Jannik; Reneerkens, Jeroen; Sabard, Brigitte; Chastel, Olivier; Moreau, Jérôme; Phillips, Richard A; Oudman, Thomas; Biersma, Elisabeth M; Fenstad, Anette A; Lang, Johannes; Bollache, Loïc

    2013-01-01

    The Long-tailed Skua, a small (summer, but little is known about its migration and winter distribution. We used light-level geolocators to track the annual movements of eight adult birds breeding in north-east Greenland (n = 3) and Svalbard (n = 5). All birds wintered in the Southern Hemisphere (mean arrival-departure dates on wintering grounds: 24 October-21 March): five along the south-west coast of Africa (0-40°S, 0-15°E), in the productive Benguela upwelling, and three further south (30-40°S, 0-50°E), in an area extending into the south-west Indian Ocean. Different migratory routes and rates of travel were documented during post-breeding (345 km d(-1) in late August-early September) and spring migrations (235 km d(-1) in late April) when most birds used a more westerly flyway. Among the different staging areas, a large region off the Grand Banks of Newfoundland appears to be the most important. It was used in autumn by all but one of the tracked birds (from a few days to three weeks) and in spring by five out of eight birds (from one to more than six weeks). Two other staging sites, off the Iberian coast and near the Azores, were used by two birds in spring for five to six weeks. Over one year, individuals travelled between 43,900 and 54,200 km (36,600-45,700 when excluding staging periods) and went as far as 10,500-13,700 km (mean 12,800 km) from their breeding sites. This study has revealed important marine areas in both the south and north Atlantic Ocean. Sustainable management of these ocean basins will benefit Long-tailed Skuas as well as other trans-equatorial migrants from the Arctic.

  17. La flexión de la notocorda en larvas de atún rojo, Thunnus thynnus (L, 1758) cultivadas a diferentes temperaturas

    OpenAIRE

    de-la-Gándara, F. (Fernando); Ortega-García, A. (Aurelio); Blanco, E. (Edurne); Viguri, F.J. (Francisco Javier); Reglero, P. (Patricia)

    2013-01-01

    Se ha estudiado el desarrollo ontogénico de las larvas de atún rojo, Thunnus thynnus, especialmente el momento de la flexión de la notocorda y su relación con la temperatura. El cultivo larvario se ha realizado en tanques replicados en un medio controlado. Los resultados contribuyen a mejorar el conocimiento existente sobre el desarrollo larvario del atún rojo en la naturaleza. Este trabajo se ha realizado en el marco del proyecto ATAME-IEO (Plan Nacional de I+D+i 2008-2011).

  18. Polychlorinated biphenyls and organochlorine pesticides as intrinsic tracer tags of foraging grounds of bluefin tuna in the northwest Atlantic Ocean

    International Nuclear Information System (INIS)

    Deshpande, Ashok D.; Dickhut, Rebecca M.; Dockum, Bruce W.; Brill, Richard W.; Farrington, Cameron

    2016-01-01

    Researchers have utilized chemical fingerprints in the determination of habitat utilization and movements of the aquatic animals. In the present effort, we analyzed polychlorinated biphenyl (PCB) congeners and organochlorine pesticides in the samples of juvenile bluefin tuna caught offshore of Virginia, and in larger bluefin tuna from the Gulf of Maine and near Nova Scotia. For a given specimen, or a given location, PCB concentrations were highest, followed by DDTs, and chlordanes. Average contaminant concentrations from fish captured from the three locations were not significantly different; and PCBs, DDTs, and chlordanes correlated well with each other. Trans-nonachlor/PCB 153 ratios in bluefin tuna of eastern Atlantic (i.e., Mediterranean) origin are low compared to the corresponding ratios in fish in the western Atlantic. As the former migrate to the western Atlantic, these ratios gradually turnover due to the accumulation of biomass from forage contaminated with higher trans-nonachlor/PCB 153 ratio reflecting dissimilar use of chlordane pesticides on two sides of the Atlantic Ocean. The trans-nonachlor/PCB 153 ratio indicated that one juvenile bluefin tuna from offshore of Virginia and one large bluefin tuna from Gulf of Maine in the present study originated from foraging grounds in the Mediterranean Sea, and that they have made the trans-Atlantic migrations. The remaining individuals were determined to be either spawned in the Gulf of Mexico or the trans-nonachlor/PCB 153 ratio for the putative Mediterranean bluefin tuna was completely turned over to resemble the ratio characteristic to the western Atlantic. Based on the turnover time for trans-nonachlor/PCB 153 ratio previously determined, the residence time of juvenile bluefin tuna offshore Virginia was estimated to be at least 0.8 to 1.6 years. A discriminant function analysis (DFA) plot of total PCB normalized signatures of PCB congeners showed three separate clusters, which suggested that bluefin tuna

  19. Visualizing the Food-Web Effects of Fishing for Tunas in the Pacific Ocean

    Directory of Open Access Journals (Sweden)

    Jefferson T. Hinke

    2004-06-01

    Full Text Available We use food-web models to develop visualizations to compare and evaluate the interactions of tuna fisheries with their supporting food webs in the eastern tropical Pacific (ETP and the central north Pacific (CNP Oceans. In the ETP and CNP models, individual fisheries use slightly different food webs that are defined by the assemblage of targeted tuna species. Distinct energy pathways are required to support different tuna species and, consequently, the specific fisheries that target different tuna assemblages. These simulations suggest that catches of tunas, sharks, and billfishes have lowered the biomass of the upper trophic levels in both systems, whereas increases in intermediate and lower trophic level animals have accompanied the decline of top predators. Trade-offs between fishing and predation mortality rates that occur when multiple fisheries interact with their respective food webs may lead to smaller changes in biomass than if only the effect of a single fishery is considered. Historical simulations and hypothetical management scenarios further demonstrate that the effects of longline and purse seine fisheries have been strongest in upper trophic levels, but that lower trophic levels may respond more strongly to purse-seine fisheries. The apex predator guild has responded most strongly to longlining. Simulations of alternative management strategies that attempt to rebuild shark and billfish populations in each ecosystem reveal that (1 changes in longlining more effectively recover top predator populations than do changes in purse seining and (2 restrictions on both shallow-set longline gear and shark finning may do more to recover top predators than do simple reductions in fishing effort.

  20. Assessment of DNA quality in processed tuna muscle tissues

    Directory of Open Access Journals (Sweden)

    Zora Piskatá

    2016-06-01

    Full Text Available Authentication of tuna fish products is necessary to assure consumers of accurate labelling of food products. The quality of species specific DNA crucially affects the efficiency of amplification during the subsequent PCR. The problem in DNA detection in canned products lies in the possibility of the fragmentation of DNA during the processing technologies and the use of ingredients (oil, salt, spice, that may inhibit the PCR reaction. In this study three DNA extraction methods were compared: DNeasy Blood and Tissue Kit, DNeasy mericon Food Kit and Chemagic DNA tissue 10 Kit. The quantity and quality of DNA were evaluated by measuring DNA concentration and ratios A260/A280. Several parameters were estimated: the effect of whole and mechanically treated muscle, sterilization procedure used in canned process (high temperature in combination with high pressure and addition of raw materials. The highest DNA concentrations were observed in non-processed muscle that is not influenced by the sterilization process. Canned whole muscle demonstrated lower DNA yield, and furthermore, the mechanical treatment (canned ground resulted in lower values of DNA concentration that was registered by using all three types of DNA extraction kits. DNeasy mericon Food Kit produced DNA of higher concentration in non-processed sample, Chemagic DNA tissue 10 Kit delivered higher DNA yields than kits DNeasy Blood and Tissue Kit and DNeasy mericon Food Kit in canned samples, although the purity was lower, but still within the range 1.7 - 2.0. DNA was considered to be satisfactorily pure in all three types of samples and using all three types of DNA isolation. In case of the samples enriched of ingredients and treated with sterilization process as whole or ground muscle Chemagic DNA tissue 10 Kit produced in all samples (whole and ground muscle the highest values of DNA concentration, but almost all values of A260/A280 were lower than 1.7. Therefore DNeasy mericon Food Kit

  1. Del cultivo basado en capturas, a la acuicultura independiente y la domesticación del atún rojo, Thunnus thynnus. Principales resultados, conclusiones y recomendaciones del Proyecto SELFDOTT

    OpenAIRE

    de-la-Gándara, F. (Fernando)

    2012-01-01

    Principales resultados, conclusiones y recomendaciones del Proyecto SELFDOTT (Del cultivo basado en capturas, a la acuicultura independiente y la domesticación del atún rojo, Thunnus thynnus.) Comisión Europea 7º PM (KBBE-2007-1-2-09 Cooperation Work Programme: Food, Agriculture and Fisheries, and Biotechnology), Versión de editor 0

  2. Influence of physical damage and freezing on histamine concentration and microbiological quality of yellowfin tuna during processing

    Directory of Open Access Journals (Sweden)

    Gonzalo García-Tapia

    2013-09-01

    Full Text Available Yellowfin tuna has a high level of free histidine in their muscle, which can lead to histamine formation by microorganisms if temperature abuse occurs during handling and further processing. The objective of this study was to measure levels of histamine in damaged and undamaged thawed muscle to determine the effect of physical damage on the microbial count and histamine formation during the initial steps of canning processing and to isolate and identify the main histamine-forming microorganisms present in the flesh of yellowfin tuna. Total mesophilic and psicrophilic microorganisms were determined using the standard plate method. The presence of histamine-forming microorganisms was determined in a modified Niven's agar. Strains were further identified using the API 20E kit for enterobacteriaceae and Gram-negative bacilli. Physically damaged tuna did not show higher microbiological contamination than that of undamaged muscle tuna. The most active histamine-forming microorganism present in tuna flesh was Morganella morganii. Other decarboxylating microorganisms present were Enterobacter agglomerans and Enterobacter cloacae. Physical damage of tune during catching and handling did not increase the level of histamine or the amount of microorganisms present in tuna meat during frozen transportation, but they showed a higher risk of histamine-forming microorganism growth during processing.

  3. Are Consumers Willing to Pay More for Sustainable Products? A Study of Eco-Labeled Tuna Steak

    Directory of Open Access Journals (Sweden)

    Guzhen Zhou

    2016-05-01

    Full Text Available A high demand for seafood leads to overfishing, harms the long-term health of seafood stocks, and threatens environmental sustainability in oceans. Sustainability certification is one of the major sustainability movements and is known as eco-labeling. For instance, in the tuna industry, leading tuna brands have committed to protecting sea turtles by allowing the tracing of the source of their tuna “from catch to can.” This paper relies on an Internet survey on consumers from Kentucky conducted in July 2010. The survey investigates household-level tuna steak (sashimi grade consumption and examines consumer preferences for eco-labeling (“Certified Turtle Safe” (CTS in this study while mimicking individuals’ seafood procurement processes. A random parameter logit model is utilized, and willingness-to-pay measures are calculated based on model estimation results. It was found that respondents on average preferred turtle-safe-labeled tuna steak and were likely to pay more for it; however, they were less likely to purchase wild-caught species, and insignificant results were found for pre-frozen. Moreover, significant heterogeneities were found across individuals regarding tuna steak purchases. The findings indicate evidence of public support for environmental friendliness, particularly with regard to eco-labeling.

  4. Oligonucleotide indexing of DNA barcodes: identification of tuna and other scombrid species in food products

    Directory of Open Access Journals (Sweden)

    Botti Sara

    2010-08-01

    Full Text Available Abstract Background DNA barcodes are a global standard for species identification and have countless applications in the medical, forensic and alimentary fields, but few barcoding methods work efficiently in samples in which DNA is degraded, e.g. foods and archival specimens. This limits the choice of target regions harbouring a sufficient number of diagnostic polymorphisms. The method described here uses existing PCR and sequencing methodologies to detect mitochondrial DNA polymorphisms in complex matrices such as foods. The reported application allowed the discrimination among 17 fish species of the Scombridae family with high commercial interest such as mackerels, bonitos and tunas which are often present in processed seafood. The approach can be easily upgraded with the release of new genetic diversity information to increase the range of detected species. Results Cocktail of primers are designed for PCR using publicly available sequences of the target sequence. They are composed of a fixed 5' region and of variable 3' cocktail portions that allow amplification of any member of a group of species of interest. The population of short amplicons is directly sequenced and indexed using primers containing a longer 5' region and the non polymorphic portion of the cocktail portion. A 226 bp region of CytB was selected as target after collection and screening of 148 online sequences; 85 SNPs were found, of which 75 were present in at least two sequences. Primers were also designed for two shorter sub-fragments that could be amplified from highly degraded samples. The test was used on 103 samples of seafood (canned tuna and scomber, tuna salad, tuna sauce and could successfully detect the presence of different or additional species that were not identified on the labelling of canned tuna, tuna salad and sauce samples. Conclusions The described method is largely independent of the degree of degradation of DNA source and can thus be applied to

  5. Oligonucleotide indexing of DNA barcodes: identification of tuna and other scombrid species in food products.

    Science.gov (United States)

    Botti, Sara; Giuffra, Elisabetta

    2010-08-23

    DNA barcodes are a global standard for species identification and have countless applications in the medical, forensic and alimentary fields, but few barcoding methods work efficiently in samples in which DNA is degraded, e.g. foods and archival specimens. This limits the choice of target regions harbouring a sufficient number of diagnostic polymorphisms. The method described here uses existing PCR and sequencing methodologies to detect mitochondrial DNA polymorphisms in complex matrices such as foods. The reported application allowed the discrimination among 17 fish species of the Scombridae family with high commercial interest such as mackerels, bonitos and tunas which are often present in processed seafood. The approach can be easily upgraded with the release of new genetic diversity information to increase the range of detected species. Cocktail of primers are designed for PCR using publicly available sequences of the target sequence. They are composed of a fixed 5' region and of variable 3' cocktail portions that allow amplification of any member of a group of species of interest. The population of short amplicons is directly sequenced and indexed using primers containing a longer 5' region and the non polymorphic portion of the cocktail portion. A 226 bp region of CytB was selected as target after collection and screening of 148 online sequences; 85 SNPs were found, of which 75 were present in at least two sequences. Primers were also designed for two shorter sub-fragments that could be amplified from highly degraded samples. The test was used on 103 samples of seafood (canned tuna and scomber, tuna salad, tuna sauce) and could successfully detect the presence of different or additional species that were not identified on the labelling of canned tuna, tuna salad and sauce samples. The described method is largely independent of the degree of degradation of DNA source and can thus be applied to processed seafood. Moreover, the method is highly flexible

  6. Detection of pelagic habitat hotspots for skipjack tuna in the Gulf of Bone-Flores Sea, southwestern Coral Triangle tuna, Indonesia.

    Science.gov (United States)

    Zainuddin, Mukti; Farhum, Aisjah; Safruddin, Safruddin; Selamat, Muhammad Banda; Sudirman, Sudirman; Nurdin, Nurjannah; Syamsuddin, Mega; Ridwan, Muhammad; Saitoh, Sei-Ichi

    2017-01-01

    Using remote sensing of sea surface temperature (SST), sea surface height anomaly (SSHA) and chlorophyll-a (Chl-a) together with catch data, we investigated the detection and persistence of important pelagic habitat hotspots for skipjack tuna in the Gulf of Bone-Flores Sea, Indonesia. We analyzed the data for the period between the northwest and southeast monsoon 2007-2011. A pelagic hotspot index was constructed from a model of multi-spectrum satellite-based oceanographic data in relation to skipjack fishing performance. Results showed that skipjack catch per unit efforts (CPUEs) increased significantly in areas of highest pelagic hotspot indices. The distribution and dynamics of habitat hotspots were detected by the synoptic measurements of SST, SSHA and Chl-a ranging from 29.5° to 31.5°C, from 2.5 to 12.5 cm and from 0.15 to 0.35 mg m-3, respectively. Total area of hotspots consistently peaked in May. Validation of skipjack CPUE predicted by our model against observed data from 2012 was highly significant. The key pelagic habitat corresponded with the Chl-a front, which could be related to the areas of relatively high prey abundance (enhanced feeding opportunity) for skipjack. We found that the area and persistence of the potential skipjack habitat hotspots for the 5 years were clearly identified by the 0.2 mg m-3 Chl-a isopleth, suggesting that the Chl-a front provides a key oceanographic indicator for global understanding on skipjack tuna habitat hotspots in the western tropical Pacific Ocean, especially within Coral Triangle tuna.

  7. CULTURAL MEMORY OF VICTORY OF LAS TUNAS CITY' LODGES FROM 1930 TO 1945 / MEMORIA CULTURAL DE LAS LOGIAS DE VICTORIA DE LAS TUNAS 1930-1945

    OpenAIRE

    Milena Medina Pérez

    2012-01-01

    The cultural memory of the lodges of Victoria de Las Tunas (1930-1945), it constitutes the topic of the present investigation. The thematic of the lodges has been approached for studious and investigating, not alone of the town but of several parts of the world. Still when these studies exist, the related with the cultural memory of the lodges of the territory, is in the pages of the documents of the time that which leaves to the light starting from this investigation, to show yesterday's Tun...

  8. Low-temperature transitions in cod and tuna determined by differential scanning calorimetry

    DEFF Research Database (Denmark)

    Jensen, Kristina Nedenskov; Jørgensen, Bo; Nielsen, Jette

    2003-01-01

    Differential scanning calorimetry measurements have revealed different thermal transitions in cod and tuna samples. Transition temperatures detected Lit -11degreesC, -15degreesC and -21degreesC were highly dependent on the annealing temperature. In tuna muscle an additional transition was observed...... at -72degreesC. This transition appeared differently than the thermal events observed at higher temperatures, as it spanned a broad temperature interval of 25degreesC. The transition was comparable to low-temperature glass transitions reported in protein-rich systems. No transition at this low...... temperature was detected in cod samples. The transitions observed at higher temperatures (-11degreesC to -21degreesC) may possibly stein from a glassy matrix containing muscle proteins. However, the presence of a glass transition at - 11degreesC was in disagreement with the low storage stability at -18degrees...

  9. Readiness Assessment Towards Smart Manufacturing System for Tuna Processing Industry in Indonesia

    Science.gov (United States)

    Anggrahini, D.; Kurniati, N.; Karningsih, P. D.; Parenreng, S. M.; Syahroni, N.

    2018-04-01

    Marine product processing is one of the top priority clusters in the national development. Tuna, as a kind of deep ocean fishes, has the highest number of production that significantly increased throughout the years. Indonesia government encourages tuna processing industry, which are mostly dominated by small to medium enterprises, to grow continuously. Nowadays, manufacturers are facing substantial challenges in adopting modern system and technology that will lead a significant improvement through the internet of things (IoT). A smart factory transform integrated manufacturing process, in a high speed processing to respond customer needs. It has some positive impacts, such as increasing productivity, reducing set up time, shortening marketing and other support activities, hence the process is being more flexible and efficient. To implement smart manufacturing system, factories should know the readiness at any level of them, technology capability and strategy appropriateness. This exploratory study aims to identify the criterias, and develop an assessment tools to measure the level towards smart factory.

  10. Improving the safety and quality of raw tuna fillets by x-ray irradiation

    Science.gov (United States)

    In this study, raw tuna fillet (25 g) samples were inoculated by immersing in 0.1% peptone water that contained 108-9 CFU ml-1 of a three-strain mixture of Salmonella enterica for 1 min. The samples were then air dried at 22 oC for 30 min and were packaged separately in sterilized bags prior to X-ra...

  11. Pengaruh Penggunaan Formalin terhadap Kerusakan Protein Daging Ikan Tuna (Thunus sp)

    OpenAIRE

    Apituley, Daniel A. N.

    2012-01-01

    Formaldehyde is used on handling and processing of fishery product by some fisher at some coastal region of Indonesia was one that promotes protein oxidation and modification of protein structure of fish meat which give direct impact on nutritional quality of fish primarily the amino acids. This experiment was done in vitro experiment by using model of protein preparat of red and white meat of tuna. The purpose of this research was to study the effect of formaldehyde concentration and impact ...

  12. EVALUASI IMPLEMENTASI MANAJEMEN BERBASIS SEKOLAH (MBSDI SMK TELEKOMUNIKASI TUNAS HARAPAN KABUPATEN SEMARANG (STUDI TENTANG PEMBELAJARAN PAKEM

    Directory of Open Access Journals (Sweden)

    Prima Widyatmoko

    2015-06-01

    Full Text Available This study aims at evaluating (a the design of implementation of PAKEM learning in SMK Telekomunikasi Tunas Harapan, (b the installation of implementation of PAKEM learning in SMK Telekomunikasi Tunas Harapan, (c the process of implementation of PAKEM learning in SMK Telekomunikasi Tunas Harapan, and (d the product evaluation of implementation of PAKEM learning in SMK Telekomunikasi Tunas Harapan. This is a evaluative research employing Discrepency Evaluation Model. Techniques of collecting data used are interview, queationaires, documentations study, and observation. Triangulation technique is used to support data validity. The results of this study are (a the design of implementation of PAKEM learning has been formulated with regard to educators criteria including input, process, and output aspects, (b there is still 2% discrepency in teachers’ certificates. Qualifications of teachers’ academic and teachers’ competencies in PAKEM learning are in line with the standards determined, (c criteria of succesful PAKEM learning program have not been fulfiled entirely. Syllabus and lesson plan preparation reach 85%. Active learning process goes to low discrepency (13%. Creative learning process goes to moderate discrepency (31%. Effective learning process goes to low discrepency (18%. Fun learning process goes to low discrepency (15%. In learning achievement assessment, teachers have done their responsibilities well, (d the products in PAKEM learning include achievement in affective aspect where 90% students gain predicate “good”, cognitive aspect where 80% students gain B-, and psychomotoric aspect where 79% students gain B-.

  13. Economic Impacts of Climate Change on Tuna Fisheries in Fiji Islands and Kiribati

    Energy Technology Data Exchange (ETDEWEB)

    Aaheim, Asbjoern; Sygna, Linda

    2000-06-01

    This paper discusses the possible economic consequences of a change in the tuna fisheries in the Pacific Ocean resulting from climate change. On the background of Lehodey's (2000) study of potential changes in the tuna fisheries, we survey possible economic impacts in terms of quantities and values and give examples of macroeconomic impacts. The two main effects of climate change on tuna fishing are likely to be a decline in the total stock and a migration of the stock westwards. This will lead to various changes in the catch in different countries. The price of the fish in the export market may also change as a result. The Pacific islands are generally dependent on fisheries, and may therefore be vulnerable to these changes, although some will probably gain while others will lose. Based on a very simple macroeconomic model, it is shown that the resulting effects for the national economy in general may diverge substantially from the expected. This applies, in particular, if the national economies are inflexible and a large part of the population relies on subsistence production, which is the case for many developing countries. (author)

  14. Isolation of 137-Cs in tuna fish by ammonium phosphomolybdate (AMP)

    International Nuclear Information System (INIS)

    Yumiarti; Surtipanti, S.

    1988-01-01

    The isolation of 137-Cs in tuna fish (Neithunnus macroptenus) has been carried out using AMP. The energy of 137-Cs was measure using NaI(T1) detector connected to a Multi Channel Analyzer (MCA). In standard solution of 137-Cs with activity 160.74 and 80.37 pCi, the addition of 120 mg AMP and 7 hours of absorption time, caused 97% of 137-Cs in the solution was absorbed. The destruction of tuna fish was carried out using two methods namely by wet destruction with sulfuric acid, nitrit acid and hydrogen peroxid mixture and by wet destruction with hydrogen peroxide. The applications of this technique of tuna fish was carried out by spiking 137-Cs standard into the fish before being destructed. The recovery obtained from wet destruction with H2O2 was about 80%, while from destruction with acid mixtures and H2O2 was only about 47%. (authors). 3 refs, 3 tabs

  15. Optimization of Processing Conditions of Traditional Cured Tuna Loins–Muxama

    Directory of Open Access Journals (Sweden)

    Eduardo Esteves

    2018-01-01

    Full Text Available Muxama is a traditional highly-valued food product prepared from dry-cured tuna loins in southern Portugal and Spain. The production procedure has seen little change over the last centuries. The muxama’s stability is due to reduced water activity. In addition, the drying method has secondary effects on characteristics of flavor, color, and the nutritional value of the product. Our objectives were to describe the dynamics of important physicochemical parameters such as moisture content, water activity (aW, NaCl concentration (as water–phase salt, ZNaCl, pH and color, during the salting and drying stages of muxama production, and to test the effect(s of changes in the traditional processing conditions followed in southern Portugal, aiming at optimizing the production procedure. The lowest values of moisture and aW and highest ZNaCl obtained after drying tuna loins for seven days at 20 °C exceeded the values reported for commercial products and have impact on the appearance (color of the product. Therefore, drying tuna loins at lower temperatures (ca. 14 °C is probably more appropriate. The results obtained in this study could be used in the design of future experiments at other conditions and to assess other quality parameters, e.g., total volatile base nitrogen (TVB-N, thiobarbituric acid reactive substances (TBA-RS, microorganism abundance and sensory attributes, and subsequent validation trials.

  16. Effects Of Using Fermented Tuna Innards In Fish Feed Formula To Pangasius Pangasius Sp. Growth

    Directory of Open Access Journals (Sweden)

    Alexander KorinusMarantika

    2015-08-01

    Full Text Available The purposes of this research were to determine the best dosage of the tuna innards fermentation powder substitution based on its survival rate specific growth rate and the conversion ratio of pangasius fish Pangasius sp. fish feed. The fish feed test formula contained 30 of raw protein. The tested fish feed consisted of fish powder mixed with substitution powder from fermented tuna innards. The substitution in fish feed A0 B10 C20 and D30. The number of pangasius fish thrown into 50x30x30 cm aquarium was 20 fish with average weight 3.120.03g. Fish feeding frequency was 5 5 three times a day at 0800 1300 and 1900 for 40 days. The results showed that with the added fermented tuna innards protein powder substitution dosage until 20 of the fish feed the survival rate improved reaching 100 the best specific growth rate was at 3.36 BB and the fish feed conversion ratio declined at the lowest 1.55 gg.

  17. Thermal characterisation of gelatin extracted from yellowfin tuna skin and commercial mammalian gelatin.

    Science.gov (United States)

    Rahman, Mohammad Shafiur; Al-Saidi, Ghalib Said; Guizani, Nejib

    2008-05-15

    Glass transition and other thermal characteristics of gelatin from different sources were studied by differential scanning calorimetry (DSC) and modulated DSC (MDSC). The initial glass transition temperatures of equilibrated gelatin samples at 11.3% relative humidity, determined from reversible heat flow thermogram of MDSC, were 23, 75 and 59°C, respectively, for tuna skin, bovine and porcine gelatin. When gelatin samples were equilibrated at higher relative humidity of 52.9%, glass transition temperature of fish skin and bovine gelatin decreased to -3 and 57°C, respectively. Further increase of equilibration relative humidity to 75.3% showed increased value in the case of tuna skin, whereas bovine and porcine did not show any significant change. DSC and MDSC results indicated that tuna gelatin showed lower glass transition compared to mammalian source gelatin equilibrated at the same constant relative humidity. In general glass transition measured by DSC was found lower than the values measured by MDSC. The results in this study showed that the degree of plasticization varied with the source of gelatin as well as their extraction methods. Copyright © 2007 Elsevier Ltd. All rights reserved.

  18. CPUE TRENDS OF THE INDONESIA’S TUNA LONGLINE FISHERY: LESSONS LEARNED FROM A TRIAL OBSERVER PROGRAM

    Directory of Open Access Journals (Sweden)

    Lilis Sadiyah

    2014-06-01

    Full Text Available In an effort to address a shortage of reliable CPUE information, and as a preliminary step to a broader observer program, Indonesia established a Trial Observer Program (TOP for the industrial tuna long line fishery based at Benoa Fishing Port, Bali, in mid 2005. The objectives of this paper are i to describe spatial and temporal catch and effort trends from the Indonesian Indian Ocean industrial tuna long line fishery based at Benoa Fishing Port, and ii to provide an understanding of the fishing strategies used by different companies and of the environmental conditions that may influence catch trends. The observed effort covered areas both north and south of 20°S, with a concentration within 10°-20°S; 105°-120°E which overlaps with the only known spawning grounds of southern bluefin tuna (SBT. This data set showed that SBT comprised the lowest catch proportion, relative to the other three tuna species caught, bigeye tuna (BET, yellowfin tuna (YFT and albacore (ALB. BET and ALB had been suggested as the main target species for the fishery, but this varied by region. The TOP data set suggests that different tuna fishing companies targeted different species and used different fishing practices, including differences in bait used, areas fished, start time of setting, and the number of hooks between floats (HBF. It is a priority to improve the spatial and temporal coverage of the observer program before the data can be considered to be representative of the fleet, particularly given the high degree of variability in fishing practices between companies.

  19. Comportamiento de la retinopatía de la prematuridad en la provincia Las Tunas Performance of retinopathy of prematurity in Las Tunas province

    Directory of Open Access Journals (Sweden)

    Yunia Herbania Labrada Rodríguez

    2006-06-01

    Full Text Available Se realizó un estudio observacional de tipo transversal en la provincia de Las Tunas en el período comprendido desde enero de 2002 a diciembre de 2004. El universo estuvo constituido por 14 503 nacidos vivos, la muestra la integraron 227 recién nacidos prematuros a los cuales se les realizó oftalmoscopia indirecta. La tasa de incidencia de retinopatía de la prematuridad fue de 0,10. Los factores de riesgo más relevantes fueron la prematuridad y el bajo peso al nacer. La retinopatía de la prematuridad fue más frecuente en recién nacidos de peso menor o igual a 1 500 g y la edad gestacional entre 30 y 34 semanas. La retinopatía de la prematuridad estadio I predominó en la serieAn observational cross-sectional study was conducted in Las Tunas province from January 2002 to December 2004. The universe of study was made up of 14 503 live births and the sample was composed by 227 premature newborns, who were performed indirect ophtalmoscopy. The incidence rate was 0,10. The most relevant risk factors were prematurity and low birthweight. Retinopathy of prematurity was more frequent in newborns weighing 1 500 g or less at birth and in gestational age of 30-34 weeks. Retinopathy of prematurity stage 1 predominated

  20. Baja visión en la población pediátrica de Las Tunas Low vision of the pediatric population in Las Tunas province

    Directory of Open Access Journals (Sweden)

    Yunia Herbania Labrada Rodríguez

    2006-12-01

    Full Text Available Se presentan los resultados de un estudio descriptivo en 35 pacientes ciegos y débiles visuales matriculados en la Escuela de Ciegos de la provincia Las Tunas. Los pacientes fueron agrupados según categoría visual, sexo, y etiología de baja visión. El sexo masculino fue el más afectado, el mayor número de pacientes eran débiles visuales y las etiologías más frecuentes de baja visión fueron la catarata congénita y la retinopatía de la prematuridadThe results of a descriptive study of 35 blind and impaired vision patients, who study at the School for Blind People in Las Tunas province were presented in this paper. The patients were grouped according to their visual category, sex and etiology of low vision. Males were the most affected, the highest number of patients had impaired vision and the most common causes of low vision were congenital cataract and prematurity retinopathy

  1. Aplikasi Sistem Informasi Geografis (SIG dan Penginderaan Jauh untuk Pemetaan Daerah Penangkapan Ikan Tuna Mata Besar di Selatan Jawa dan Bali

    Directory of Open Access Journals (Sweden)

    Kadek Bagus Padmaningrat

    2017-02-01

    Full Text Available Bigeye tuna is the dominant species of tuna caught in the territorial waters of the Indian Ocean and a productive tropical species which accounts for more than 10% of the total catch in the whole world. Distribution of bigeye tuna can be predicted through optimum temperature associated with the presence of bigeye tuna and distribution of chlorophyll-a is associated with the presence of small pelagic fish. The distribution of sea surface temperature and chlorophyll-a can be detected through remote sensing systems. The purpose of this study was to determine the relationship between sea surface temperature and chlorophyll-a by the number of bigeye tuna catches in the waters south of Java and Bali, and mapped the area catching bigeye tuna in the waters south of Java and Bali. The method used is a second order polynomial regression analysis to determine the effect of sea surface temperature and chlorophyll-a by the number of bigeye tuna catches as well as correlation analysis to determine the relationship of sea surface temperature and chlorophyll-a by the number of bigeye tuna catches. Sea surface temperature and chlorophyll-a is related to the number of bigeye tuna catches.  The results of the analysis showed a strong relationship between sea surface temperature and chlorophyll-a by the number of bigeye tuna catches. Bigeye tuna fishing grounds in the waters south of Java and Bali are in a position 12oS-15oS and 106°E-118°E.

  2. Phylogeographic structure in long-tailed voles (Rodentia: Arvicolinae) belies the complex Pleistocene history of isolation, divergence, and recolonization of Northwest North America's fauna.

    Science.gov (United States)

    Sawyer, Yadéeh E; Cook, Joseph A

    2016-09-01

    Quaternary climate fluctuations restructured biodiversity across North American high latitudes through repeated episodes of range contraction, population isolation and divergence, and subsequent expansion. Identifying how species responded to changing environmental conditions not only allows us to explore the mode and tempo of evolution in northern taxa, but also provides a basis for forecasting future biotic response across the highly variable topography of western North America. Using a multilocus approach under a Bayesian coalescent framework, we investigated the phylogeography of a wide-ranging mammal, the long-tailed vole, Microtus longicaudus . We focused on populations along the North Pacific Coast to refine our understanding of diversification by exploring the potentially compounding roles of multiple glacial refugia and more recent fragmentation of an extensive coastal archipelago. Through a combination of genetic data and species distribution models (SDMs), we found that historical climate variability influenced contemporary genetic structure, with multiple isolated locations of persistence (refugia) producing multiple divergent lineages (Beringian or northern, southeast Alaska or coastal, and southern or continental) during glacial advances. These vole lineages all occur along the North Pacific Coast where the confluence of numerous independent lineages in other species has produced overlapping zones of secondary contact, collectively a suture zone. Finally, we detected high levels of neoendemism due to complex island geography that developed in the last 10,000 years with the rising sea levels of the Holocene.

  3. Utilization of tuna roe and using inulin as oil replacer for producing value added omega-3 mayonnaise product

    Directory of Open Access Journals (Sweden)

    Kanrawee Hunsakul

    2016-03-01

    Full Text Available Background: The fishery industry has been important for Thailand’s economy for more than 30 years. For example, Thailand isthe world’s largest canned tuna producer and exporter. However, onlyordinary meat or white meatis usedfor raw materialin canned tuna products. Whileroe, viscera, head and dark meataresold at cheap prices,with theseby-products being usedto feed plant or local human food,its nutritive values withfat,protein and minerals arestill high. It is well known that tuna is a good source of polyunsaturated fatty acid (PUFA, including Eicosapentaenoicacid (EPA and Docosahexanoic acid (DHA.People around the world pay more attention to eatingsaladsconsisting of fruits and vegetables, in addition todressing. Generally, mayonnaise, a kind of salad dressing, consists of chicken egg yolk(12-15% and soybean oil (30-65%. Both of these ingredients contain very high saturated fatty acid contents. Therefore, because normal mayonnaise is high in fat content and low in polyunsaturated fatty acid, this product is not ideal for people on a diet or those who are trying to control their weight. Objective: To increase omega-3 through tuna roe substitution and to replace fat content using inulin gel. Methods: Tuna roe was prepared by soaking in galangalsolutionextracted with 95% ethanol for removal fishy/rancidity odor. Inulin powder 45 g was suspended in 55 ml of water before being brought to heat at temperature 80oC for 30min to form a gel and stored at 4oC. Treatment ofmakingomega-3 mayonnaise product was started using 100% tuna roe substitution for egg yolk. Thereafter, inulin gel was added to replace vegetable oil at 0, 25, 50, 75 and 100%. Basic mayonnaise containing egg yolk and 0% inulin gel (100% soy bean oil was used asthecontrol sample. Color and emulsion stability testswere monitored for physical quality. pH value, peroxide value (PV and thiobarbituric acid reactive substances (TBARS were used for chemical qualityanalyses. Total viable

  4. Effect of electron irradiation and bayberry polyphenols on the quality change of yellowfin tuna fillets during refrigerated storage

    International Nuclear Information System (INIS)

    Bu, Tingting; Jin, Yang; Li, Xiaohui; Zhang, Jinjie; Xu, Dalun; Yang, Wenge; Lou, Qiaoming

    2017-01-01

    This study evaluated the synergistic effect of bayberry polyphenols and electron irradiation in controlling the chemical, microbiological and sensory changes of raw yellowfin tuna fillets at 4 °C for 7 days. The results indicated that the initial values of each index were dose-dependent. The dose of 5 kGy notably accelerated adenosine triphosphate degradation and lipid oxidation, while the doses of 1 and 3 kGy had acceptable sensory quality and yielded a shelf-life of 5 days. The addition of bayberry polyphenols had evident effect in inhibiting freshness breakdown, bacteria growth, histamine formation, and discoloration of tuna fillets. Bayberry polyphenols, as an antioxidant, could inhibit lipid oxidation and sensory side-effects made by irradiation up to 3 kGy. The dose of 1–3 kGy coupled with bayberry polyphenols was optimum to preserve tuna fillets which prolonged the shelf-life to 7 days. - Highlights: • Electron irradiation inhibited bacteria growth and histamine formation. • Electron irradiation increased the red color of tuna fillets. • 5 kGy irradiation decreased the sensory quality of raw tuna fillets. • Bayberry polyphenols combined with irradiation could retard the quality change. • Bayberry polyphenols could be used as natural antioxidant and color fixative.

  5. Effect of electron irradiation and bayberry polyphenols on the quality change of yellowfin tuna fillets during refrigerated storage

    Science.gov (United States)

    Bu, Tingting; Jin, Yang; Li, Xiaohui; Zhang, Jinjie; Xu, Dalun; Yang, Wenge; Lou, Qiaoming

    2017-09-01

    This study evaluated the synergistic effect of bayberry polyphenols and electron irradiation in controlling the chemical, microbiological and sensory changes of raw yellowfin tuna fillets at 4 °C for 7 days. The results indicated that the initial values of each index were dose-dependent. The dose of 5 kGy notably accelerated adenosine triphosphate degradation and lipid oxidation, while the doses of 1 and 3 kGy had acceptable sensory quality and yielded a shelf-life of 5 days. The addition of bayberry polyphenols had evident effect in inhibiting freshness breakdown, bacteria growth, histamine formation, and discoloration of tuna fillets. Bayberry polyphenols, as an antioxidant, could inhibit lipid oxidation and sensory side-effects made by irradiation up to 3 kGy. The dose of 1-3 kGy coupled with bayberry polyphenols was optimum to preserve tuna fillets which prolonged the shelf-life to 7 days.

  6. Polychlorinated biphenyls and organochlorine pesticides as intrinsic tracer tags of foraging grounds of bluefin tuna in the northwest Atlantic Ocean.

    Science.gov (United States)

    Deshpande, Ashok D; Dickhut, Rebecca M; Dockum, Bruce W; Brill, Richard W; Farrington, Cameron

    2016-04-15

    Researchers have utilized chemical fingerprints in the determination of habitat utilization and movements of the aquatic animals. In the present effort, we analyzed polychlorinated biphenyl (PCB) congeners and organochlorine pesticides in the samples of juvenile bluefin tuna caught offshore of Virginia, and in larger bluefin tuna from the Gulf of Maine and near Nova Scotia. For a given specimen, or a given location, PCB concentrations were highest, followed by DDTs, and chlordanes. Average contaminant concentrations from fish captured from the three locations were not significantly different; and PCBs, DDTs, and chlordanes correlated well with each other. Trans-nonachlor/PCB 153 ratios in bluefin tuna of eastern Atlantic (i.e., Mediterranean) origin are low compared to the corresponding ratios in fish in the western Atlantic. As the former migrate to the western Atlantic, these ratios gradually turnover due to the accumulation of biomass from forage contaminated with higher trans-nonachlor/PCB 153 ratio reflecting dissimilar use of chlordane pesticides on two sides of the Atlantic Ocean. The trans-nonachlor/PCB 153 ratio indicated that one juvenile bluefin tuna from offshore of Virginia and one large bluefin tuna from Gulf of Maine in the present study originated from foraging grounds in the Mediterranean Sea, and that they have made the trans-Atlantic migrations. The remaining individuals were determined to be either spawned in the Gulf of Mexico or the trans-nonachlor/PCB 153 ratio for the putative Mediterranean bluefin tuna was completely turned over to resemble the ratio characteristic to the western Atlantic. Based on the turnover time for trans-nonachlor/PCB 153 ratio previously determined, the residence time of juvenile bluefin tuna offshore Virginia was estimated to be at least 0.8 to 1.6years. A discriminant function analysis (DFA) plot of total PCB normalized signatures of PCB congeners showed three separate clusters, which suggested that bluefin tuna

  7. Prediction of Potential Fishing Zones for Skipjack Tuna During the Northwest Monsoon Using Remotely Sensed Satellite Data

    Directory of Open Access Journals (Sweden)

    Mukti Zainuddin

    2017-06-01

    Full Text Available One of economically important fish in the Bay of Bone is Skipjack tuna which their distribution and migration are influenced by surrounding environment.  This study aims to investigate the relationship between skipjack tuna and their environments, and to predict potential fishing zones (PFZs for the fish in the Bone Bay-Flores Sea using satellite-based oceanography and catch data. Generalized additive models (GAMs were used to assess the relationship. A generalized linear model(GLM constructed from GAMs was used for prediction. Monthly mean sea surface temperature (SST and chlorophyll-a during the northwest monsoon (December-January together with catch data were used for the year 2012-2013. We used the GAMs to assess the effect of the environment variables on skipjack tuna CPUE (catch per unit effort. The best GLM was selected to predict skipjack tuna abundance.  Results indicated that the highest CPUEs (fish/trip occurred in areas where SST and chlorophyll-a ranged from 29.5°-31.5°C and 0.15 - 0.25 mg m-3, respectively. The PFZs for skipjack were closely related to the spatial distribution of the optimum oceanographic conditions and these mainly developed in three locations, northern area of Bone Bay in December, in the middle area of the bay (4°-5.5°S and 120.5°-121.5°E during January and moved to the Flores Sea in February. The movement of skipjack concentration was consistent with the fishery data.  This suggests that the dynamics of the optimum oceanographic signatures provided a good indicator for predicting feeding grounds as hotspot areas for skipjack tuna in Bone Bay-Flores Sea during northwest monsoon.   Keywords:  skipjack tuna, potential fishing zones, satellite based-oceanographic data, Northwest monsoon

  8. Some epidemiological and clinical characteristics of solid malignant tumors in children from Las Tunas

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    Silvio Laffita Estévez

    2015-11-01

    Full Text Available Background: cancer has kept up as the second cause of death in Las Tunas pediatric population.Objective: to characterize clinical and epidemiological variables of the cases diagnosed with solid malignant tumors in children seen and treated in the onco-pediatric consultation of “Mártires de Las Tunas” Pediatric Hospital from 2010 to 2014.Methods: a descriptive and retrospective study was carried out in 62 patients with solid malignant tumors in the pediatric population of Las Tunas province, from January, 2010 to December, 2014. The variables considered were: presumptive diagnosis, age, family history of tumors, clinical signs of alarm related to the tumor at the moment of diagnosis and investigations to confirm the diagnosis.  Results: non-Hodgkin lymphoma was the most frequently diagnosed tumor, with a 19, 35% of the patients. The most affected age group was between 11 and 14 years old, with a 33, 87%. The 16, 13% of the patients had family history of solid malignant tumors. The most frequent form of presentation was the abdominal tumor, with 29, 03 %. Abdominal ultrasound and computerized axial tomography were the most used complementary diagnostic means, both in the 17, 74% of the patients. Biopsy was used to confirm the 96, 77% of the cases.Conclusions: the clinical and epidemiological variables were characterized in pediatric patients diagnosed with solid malignant tumors in Las Tunas. Children between 11 and 14 years old and family history of malignant tumors were the most significant findings.

  9. Projecting the impacts of climate change on skipjack tuna abundance and spatial distribution.

    Science.gov (United States)

    Dueri, Sibylle; Bopp, Laurent; Maury, Olivier

    2014-03-01

    Climate-induced changes in the physical, chemical, and biological environment are expected to increasingly stress marine ecosystems, with important consequences for fisheries exploitation. Here, we use the APECOSM-E numerical model (Apex Predator ECOSystem Model - Estimation) to evaluate the future impacts of climate change on the physiology, spatial distribution, and abundance of skipjack tuna, the worldwide most fished species of tropical tuna. The main novelties of our approach lie in the mechanistic link between environmental factors, metabolic rates, and behavioral responses and in the fully three dimensional representation of habitat and population abundance. Physical and biogeochemical fields used to force the model are provided by the last generation of the IPSL-CM5 Earth System Model run from 1990 to 2100 under a 'business-as-usual' scenario (RCP8.5). Our simulations show significant changes in the spatial distribution of skipjack tuna suitable habitat, as well as in their population abundance. The model projects deterioration of skipjack habitat in most tropical waters and an improvement of habitat at higher latitudes. The primary driver of habitat changes is ocean warming, followed by food density changes. Our projections show an increase of global skipjack biomass between 2010 and 2050 followed by a marked decrease between 2050 and 2095. Spawning rates are consistent with population trends, showing that spawning depends primarily on the adult biomass. On the other hand, growth rates display very smooth temporal changes, suggesting that the ability of skipjack to keep high metabolic rates in the changing environment is generally effective. Uncertainties related to our model spatial resolution, to the lack or simplification of key processes and to the climate forcings are discussed. © 2013 John Wiley & Sons Ltd.

  10. The oxidative stability of chilled and frozen pilchards used as feed for captive southern bluefin tuna

    DEFF Research Database (Denmark)

    Fitz-Gerald, C.H.; Bremner, Allan

    1998-01-01

    . Vacuum packaging in a film of low permeability to oxygen was less effective than glazing and is not recommended due to cost. Pilchards in which oxidation had commenced before freezing continued to oxidise in frozen storage irrespective of whether they were glazed or vacuum packed. It was thus thoroughly...... demonstrated that the oil in the pilchards is very readily oxidised and careful handling, chilling, freezing and storage procedures need to be adopted to provide a product which is a nutritionally sound feed material for captive tuna. The demerit point scoring system was found to be a rapid evaluative...

  11. A cascade of warming impacts brings bluefin tuna to Greenland waters

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Payne, Mark; Boje, Jesper

    Rising ocean temperatures are causing marine fish species to shift spatial distributions and ranges, and are altering predator-prey dynamics in food-webs. Most documented cases of species shifts so far involve relatively small species at lower trophic levels, and consider individual species...... since 1985, when temperatures began to rise. The presence of bluefin tuna in this region is likely due to a combination of warm temperatures that are physiologically more tolerable and immigration of an important prey species into the region. We conclude that a cascade of climate change impacts...

  12. Kinetics of heat-induced color change of a tuna-vegetable mixture

    OpenAIRE

    Scherer, Erika; Sandoval, Aleida J; Barreiro, José A

    2009-01-01

    Heat induced color change kinetics in a tuna-vegetable mixture was evaluated by measuring color parameter "L" (Hunter-Lab) and 5-hydroxi-methyl-furfural (5-HMF) accumulation. For this purpose small reusable stainless steel TDT cans were used and the kinetic studies performed in a temperature range characteristic of thermal processing of low acid canned foods (110-125°C). The color parameter L was better described by a pseudo zero order while a pseudo first order reaction was found for 5-HMF a...

  13. Report on the intercomparison run IAEA-352 radionuclides in tuna fish flesh

    International Nuclear Information System (INIS)

    Ballestra, S.; Vas, D.; Lopez, J.J.; Noshkin, V.

    1990-08-01

    The results of an intercomparison exercise on a sample of tuna fish flesh from the Mediterranean Sea, IAEA-352, designed for the determination of artificial and natural radionuclides levels, are reported. The data from 63 laboratories from 31 countries have been evaluated. The following are the recommended values, with confidence intervals, for the most frequently measured radionuclides (Reference data: 1 January 1989): 137 Cs 2.7 Bq kg -1 , 90 Sr 0.2 Bq Kg -1 , 40 K 391 Bq Kg -1 , 210 Pb 0.6 Bq Kg -1 , 210 Po 2.2 Bq Kg -1 . Tabs

  14. Historia del Boxeo en la provincia de las Tunas hasta 1990

    OpenAIRE

    Etián Jiménez Espinosa; Guillermo Montero Quesada; Luís Fidel Velásquez Ortega

    2009-01-01

    La presente investigación hace un estudio sobre los antecedentes, génesis, evolución y desarrollo del boxeo en la provincia en Las Tunas, el cual se realiza a partir de una periodización hasta nuestros días. El estudio responde a una de las problemáticas más complejas y necesarias del territorio, que responde a la carencia de información bibliográfica para impartir con la calidad pertinente la asignatura Historia del Deporte, en todos sus ámbitos – internacional, nacional y local- y con un en...

  15. Anaerobic co-digestion of animal waste: swine manure and tuna fish waste

    Energy Technology Data Exchange (ETDEWEB)

    Otero, L.; Alvarez, J. A.; Lema, J. M.

    2009-07-01

    Anaerobic digestion has become an established and proven technology for the treatment of solid wastes. Co-digestion offers several possible ecological, technology and economical advantages. Anaerobic co-digestion can increase CH{sub 4} production of manure diesters in a 50-200% according to the operation conditions and the co-substrates used. Last September 2007, PROBIOGAS project started up with the objective of improving the production and use of biogas from co-digestion of farming, agricultural and industrial waste. Our research group takes part in the study of co-digestion of swine manure firstly with tuna fish waste and secondly with glycerine (bio diesel production waste). (Author)

  16. OPTIMASI JUMLAH RUMPON, UNIT ARMADA DAN MUSIM PENANGKAPAN PERIKANAN TUNA DI PERAIRAN PRIGI, JAWA TIMUR

    Directory of Open Access Journals (Sweden)

    Erfind Nurdin

    2016-05-01

    Full Text Available Sebagai alat bantu penangkapan ikan, rumpon berfungsi untuk menarik kelompok ikan agar berkumpul di sekitarnya. Dalam jangka pendek rumpon dapat meningkatkan produksi hasil tangkapan, efisiensi dan efektivitas operasi penangkapan ikan. Namun rumpon juga dapat berdampak negatif terhadap keberlajutan stok sumberdaya. Penelitian ini dilakukan di PPN Prigi, Jawa Timur, dengan tujuan untuk mengkaji status pemanfaatan perikanan tuna, optimasi jumlah unit armada dan rumpon serta musim penangkapan ikan.  Beberapa analisis yang digunakan antara lain linear goal programming (LGP, fishing power indeks (FPI, catch per unit of effort (CPUE, maximum sustainable yield (MSY, dan untuk mengetahui pola musim tangkap menggunakan Metode Persentase Rata-rata. Hasil penelitian menunjukkan terdapat indikasi pemanfaatan perikanan tuna yang berlebih pada tingkat pengupayaan yang melampaui batas maksimum (MSY = 2334,9 ton/tahun.  Jumlah optimum untuk armada jaring insang sebanyak 43 unit, pancing tonda 63 unit dan rumpon 33 unit pada luasan area penelitian 8.940 km². Musim tangkap berlangsung pada Bulan Juni sampai Desember dengan puncak musim di bulan Juli.    Fish Aggregating Device (FADs has a function to attract and aggregate fish schooling. In short term, the advantage of FADs used is to increase the efficiency and effectiveness of fishing operations and the fish caught by the fishers; however FADs might also result a negative impact on the sustainability of fish stock.This study was conducted in fishing area of Prigi National Fishing Port, East Java. The objective of this study is to investigate the tuna fisheries status, optimization number of fishing units and number of FADs. Some analysis methods applied in this study were linear goal programming (LGP, fishing power index (FPI, catch per unit of effort (CPUE, maximum sustainable yield (MSY, and analysis of fishing season using the Average Percentage Methods. The results showed that the tuna fisheries in

  17. Past climate change and recent anthropogenic activities affect genetic structure and population demography of the greater long-tailed hamster in northern China.

    Science.gov (United States)

    Ye, Junbin; Xiao, Zhenlong; Li, Chuanhai; Wang, Fusheng; Liao, Jicheng; Fu, Jinzhong; Zhang, Zhibin

    2015-09-01

    The genetic diversity and the spatial structure of a species are likely consequences of both past and recent evolutionary processes, but relevant studies are still rare in East Asia where the Pleistocene climate has unique influences. In this study, we examined the impact of past climate change and recent anthropogenic activities on the genetic structure and population size of the greater long-tailed hamster (Tscherskia triton), an agricultural rodent pest species in northern China. DNA sequence data of 2 mitochondrial genes and genotypic data of 11 microsatellite DNA loci from 41 populations (545 individuals) were gathered. Phylogenetic and population genetic analyses, as well as species distribution modeling and coalescent simulations, were conducted to infer its historical and demographic patterns and processes. Two deeply diverged mitochondrial clades were recovered. A small one was restricted to the Shandong Peninsula while the main clade was further divided into 3 geographic clusters by their microsatellite DNA genotypes: Northwest, North-center and Northeast. Divergence dating indicated a Middle-to-Late Pleistocene divergence between the 2 clades. Demographic analysis indicated that all 3 and pooled populations showed consistent long-period expansions during last glacial period; but not during the Holocene, probably due to the impact of climate warming and human disturbances. Conflicting patterns between mtDNA and microsatellite markers imply an anthropogenic impact on North-center populations due to intensified agricultural cultivation in this region. Our study demonstrated that the impact of past glaciation on organisms in East Asia significantly differs from that of Europe and North America, and human activity is an important factor in determining the genetic diversity of a species, as well as its spatial structure. © 2015 International Society of Zoological Sciences, Institute of Zoology/Chinese Academy of Sciences and Wiley Publishing Asia Pty Ltd.

  18. From cars to bikes - the feasibility and effect of using e-bikes, longtail bikes and traditional bikes for transportation among parents of children attending kindergarten: design of a randomized cross-over trial.

    Science.gov (United States)

    Bjørnarå, Helga Birgit; Berntsen, Sveinung; Te Velde, Saskia J; Fegran, Liv; Fyhri, Aslak; Deforche, Benedicte; Andersen, Lars Bo; Bere, Elling

    2017-12-28

    The present study aims to increase bicycling and level of physical activity (PA), and thereby promote health in parents of toddlers, by giving access to different bicycle types. There is a need for greater understanding of e-bikes and their role in the transportation network, and further effects on PA levels and health. Moreover, longtail bikes could meet certain practical needs not fulfilled by e-bikes or traditional bikes, hence increased knowledge regarding their feasibility should be obtained. No previous studies have investigated whether providing an e-bike or a longtail bike over an extended period in a sample of parents of toddlers influence objectively assessed amount of bicycling and total PA level, transportation habits, cardiorespiratory fitness, body composition and blood pressure. A randomized cross-over trial will be performed, entailing that participants in the intervention group (n = 18) complete the following intervention arms in random order: (i) three months access to an e-bicycle with trailer for child transportation (n = 6), (ii) three months access to a longtail bicycle (n = 6), and (iii) three months access to a regular bicycle with trailer (n = 6), in total nine months. Also, a control group (n = 18) maintaining usual transportation and PA habits will be included. A convenience sample consisting of 36 parents of toddlers residing in Kristiansand municipality, Southern Norway, will be recruited. Total amount of bicycling (distance and time), total level of PA, and transportation habits will be measured at baseline and in connection to each intervention arm. Cardiorespiratory fitness, body composition and blood pressure will be measured at baseline and post-intervention. Main outcome will be bicycling distance and time spent cycling. New knowledge relevant for the timely issues of public health and environmental sustainability will be provided among parents of toddlers, representing a target group of greatest importance

  19. Efecto del proceso de esterilización en conservas de atún al natural | Effect of the sterilization process canned tuna in water

    Directory of Open Access Journals (Sweden)

    Enrique Pino Hernández

    2017-11-01

    Full Text Available The goal of this study was to evaluate the effect of the sterilization process in natural canned tuna (Katsuwonus pelamis. Three treatments were carried out: A1: precooked tuna at 110°C x 110 min, A2: tuna sterilized at 117.77°C x 55 min and A3: tuna sterilized at 117.77°C x 70 min. The canned tuna samples were analyzed microbiologically, the parameters pH, color, texture, in addition to the proximal composition were determined and a sensory difference test was performed paired with a trained panel. All results were compared through ANOVA and Duncan test. The results of the microbiological tests show that there were no risks to the health of consumers. pH had a significant difference between the treatments studied. The color of the tuna tablet presented significant differences in L* and a* coordinates, resulting in A2 with a tendency towards light reds. As for b*, there were no significant differences. The treatments had no significant difference in texture (TPA. The moisture content and proteins had a significant difference, due to the thermal process, but not for fats, ashes and total carbohydrates. There were no significant differences in the sensory test. The A2 treatment is proposed as a production alternative because it minimizes the adverse effects on the characteristics evaluated in canned tuna.

  20. Heavy metal content and molecular species identification in canned tuna: Insights into human food safety.

    Science.gov (United States)

    Pappalardo, Anna Maria; Copat, Chiara; Ferrito, Venera; Grasso, Alfina; Ferrante, Margherita

    2017-05-01

    Canned tuna in olive oil and in brine of the most popular brands sold in Italian markets were analyzed to verify the authentication of transformed products, with the aim to unveil commercial frauds due to the substitutions of high value species with species of low commercial value, and to assess the health risk of consumers related to cadmium (Cd), lead (Pb) and mercury (Hg) contents. Species authentication was evaluated with amplification of COI DNA barcode and confirmed the declared species. Among tested metals, Hg had the highest concentrations, followed by Cd and Pb. None of the tested samples surpassed the European regulatory limits no. 1881/2006 fixed for Hg and Pb, whereas one batch of canned tuna in olive oil exceeded standard for Cd. Risk for human health was evaluated by the metals daily intake and target hazard quotient (THQ). As a result, Cd and Pb did not exceed the toxicological reference values established by World Health Organization (WHO) and the Environmental Protection Agency (EPA). Conversely, Hg content suggests a consumption no more than once a week and a continuous surveillance of this fishery products for consumer protection.

  1. Evaluation of Antioxidant Activity of Extracts of Marine Algae Halimeda tuna Collected from the Chabahar Bay

    Directory of Open Access Journals (Sweden)

    Ali Taheri

    2017-07-01

    Full Text Available Background and Objectives: Seaweeds are one of the richest sources of natural antioxidants. Antioxidants are main factors of free radical scavenging, which prevent from chronic diseases and food deterioration. These compounds can also be extracted from seaweeds. In this study, the antioxidant activity of the extracts from marine algae Halimeda tuna collected from the coast of Chabahar, was evaluated. Methods: This is an in vitro study. The antioxidant activity of methanol, chloroform, ethyl acetate, and n-hexanic extracts of the algae, were evaluated using three methods of DPPH, ferrous ion chelating activity, and reduction power methods. Data were analyzed by one-way ANOVA and Tukey test at the probability level of 95%. Results: In this study, the highest antioxidant capacity according to DPPH, was related to the chloroform extract (72.85% inhibition at the concentration of 1mg/ml. In the ferrous ion chelating activity, the highest percentage of chelating was allocated to the methanol extract (81.46%. Based on the data from the reduction power test, the highest reduction activity was related to the methanol extract with absorption of 0.553 (concentration, 1mg/ml. Conclusion: Based on the results of this research, the extracts of Halimeda tuna have the potential for application in medicine and pharmaceutical industry and must be confirmed by preclinical and clinical studies.

  2. PENYULUHAN METODE PAP SMEAR TERHADAP TINGKAT PENGETAHUAN DAN SIKAP WANITA TUNA SUSILA DALAM PENDETEKSIAN KANKER SERVIKS

    Directory of Open Access Journals (Sweden)

    Ismi Wulandari AS

    2015-03-01

    Full Text Available Abstract: The Effectiveness Of Pap smear Test’s Counseling Regarding To The Level Of Knowledge And Behaviour In Prostitution Worker For Detection Of Cervical Cancer In Bintang Mas Kubu Raya 2014. The aim of this study is to evaluate the effectivity of counseling toward knowledge and behavior. in prostitution worker about pap smear and cervical cancer. This research was quasi-experimental with one group pretest-postest design. There are 38 respondents. McNemar test showed there are significant. improvement of knowledge (p<0.05, and significance behavior change (p<0.05 in all respondents before and after counseling. Keyword : knowledge, behaviour, cervical cancer, pap smear Abstrak : Penyuluhan Metode Pap smear Terhadap Tingkat Pengetahuan Dan Sikap Wanita Tuna Susila Dalam Pendeteksian Kanker Serviks. Tujuan penelitian ini yaitu untuk melihat efektivitas terhadap pengetahuan dan sikap melalui penyuluhan mengenai pap smear kepada para wanita tuna susila. Rancangan penelitian yang digunakan dalam penelitian ini adalah quasi eksperimental dengan rancangan one group pretest-postest design. Besar sampel berjumlah 38 orang. Hasil menunjukkan uji McNemar menunjukkan terdapat signifikansi yang bermakna untuk pengetahuan (p < 0,05 dan signifikansi untuk perubahan sikap (p<0.05 pada responden sebelum dan setelah penyuluhan. Kata kunci : pengetahuan, sikap, kanker serviks, pap smear

  3. IMPACT OF CLIMATE ANOMALY ON CATCH COMPOSITION OF NERITIC TUNA IN SUNDA STRAIT

    Directory of Open Access Journals (Sweden)

    Khairul Amri

    2013-12-01

    Full Text Available Tongkol komo/kawakawa (Euthynnus affinis and tenggiri (Scomberomerus guttatus are commonly caught by mini purseiners operated in Sunda Straits and landed in Labuan, West Java. This species inhabits coastal water and has preference staying in relatively warm water. Oceanography parameters commonly influencing the distribution of Euthynnus affinis are temperature, current, and salinity. The oceanography of Sunda Strait is influenced by water masses coming from the north that mainly originated from the Java Sea and water masses from the south mainly originated from Indian Ocean. The internal oceanography of Sunda Strait is also influenced by upwelling and monsoon as regional climate anomaly (ENSO and Indian Ocean Dipole Mode. This paper describes the influence of Dipole Mode (positive and negative event and ENSO (El- Nino/La-Nina to the catch dynamics of neritic tuna particularly in Sunda Straits waters. The results shown that regional climate anomaly influenced neritic tuna catch and its composition. The catches Euthynnus affinis in phase negative dipole mode or La-Nina were higher and dominated the catch composition of pelagic fishes of Sunda Strait. Similar situation also is showen by Scomberomorus commerson.

  4. Microbiological stability of canned tuna produced in Italy and in non-European countries

    Directory of Open Access Journals (Sweden)

    Francesco Casalinuovo

    2015-03-01

    Full Text Available The results of a study on the microbiological stability of canned tuna produced by Italian companies and similar canned products manufactured in countries outside Europe are reported herein. The study involved 38 samples of canned tuna of various brands, of which 14 were produced by companies outside Europe and 24 by Italian companies. Qualitative and quantitative microbiological tests were conducted for the following parameters: bacterial colony counts at 30°C, total coliforms, total Enterobacteriaceae, sulphite-reducing anaerobes, Salmonella spp., Bacillus cereus, Escherichia coli, Staphylococcus aureus, yeasts and molds. Bacterial loads and mold contamination were respectivelyin found in 8/14 (57% samples from outside EU and 7/24 (29% Italian samples. The bacterial flora was represented by Gram-positive bacteria (Staphylococcus warneri, Staphylococcus lentus, Streptococcus mitis, Enterococcus faecalis, Leuconostoc mesenteroides, Gram-negative bacteria (Sphingomonas paucimobilis, Acinetobacter iwoffii, Rhizobium radiobacter, spore-forming bacteria (Bacillus vallismortis, while the fungal species was represented by Penicillium spp., Rhizopus spp., Rhodotorula spp. and Alternaria spp. Excluding anomalies in the thermal treatment process of products and any contamination after treatment, the contaminations encountered in both cases were most likely due to insufficient production quality standards and the quality of the raw material used. These results may require a redefinition of the concept of commercial stability as hitherto stated.

  5. Optimisation of the microencapsulation of tuna oil in gelatin-sodium hexametaphosphate using complex coacervation.

    Science.gov (United States)

    Wang, Bo; Adhikari, Benu; Barrow, Colin J

    2014-09-01

    The microencapsulation of tuna oil in gelatin-sodium hexametaphosphate (SHMP) using complex coacervation was optimised for the stabilisation of omega-3 oils, for use as a functional food ingredient. Firstly, oil stability was optimised by comparing the accelerated stability of tuna oil in the presence of various commercial antioxidants, using a Rancimat™. Then zeta-potential (mV), turbidity and coacervate yield (%) were measured and optimised for complex coacervation. The highest yield of complex coacervate was obtained at pH 4.7 and at a gelatin to SHMP ratio of 15:1. Multi-core microcapsules were formed when the mixed microencapsulation system was cooled to 5 °C at a rate of 12 °C/h. Crosslinking with transglutaminase followed by freeze drying resulted in a dried powder with an encapsulation efficiency of 99.82% and a payload of 52.56%. Some 98.56% of the oil was successfully microencapsulated and accelerated stability using a Rancimat™ showed stability more than double that of non-encapsulated oil. Copyright © 2014 Elsevier Ltd. All rights reserved.

  6. Improvement of color and physiological properties of tuna-processing by-product by gamma irradiation

    International Nuclear Information System (INIS)

    Choi, Jong-il; Kim, Hyun-Joo; Kim, Jae-Hun; Song, Beom-Seok; Chun, Byeong-Soo; Ahn, Dong-Hyun; Byun, Myung-Woo; Lee, Ju-Woon

    2009-01-01

    Although the by-products from fishery industry had many nutrients, it is being wasted or only used as bacteria media. In this study, the effect of a gamma irradiation on the cooking drips of Thunnus thynnus (CDT) was investigated to examine the possible use of the cooking drips as a functional material for food and cosmetic composition. Total aerobic bacteria, and yeasts/molds from CDT were detected at the level of 2.79 and 2.58 Log CFU/mL, respectively. But, CDT was efficiently sterilized by a gamma irradiation at a low dose of 1 kGy. The Hunter L* value of the gamma-irradiated ethanol extract of CDT was increased, and the a* and b* values were decreased compared to the non-irradiated extract, showing color improvement. Antioxidant activity of the ethanol extract of CDT was increased by a gamma irradiation depending on the irradiation dose. The increased contents of polyphenolic compounds and proteins in CDT extract by gamma irradiation may be the reason of the increased biological activity. These results suggested that the wasted cooking drips can be successfully used as functional components with gamma irradiation treatment.

  7. Proteomic analysis of processing by-products from canned and fresh tuna: identification of potentially functional food proteins.

    Science.gov (United States)

    Sanmartín, Esther; Arboleya, Juan Carlos; Iloro, Ibon; Escuredo, Kepa; Elortza, Felix; Moreno, F Javier

    2012-09-15

    Proteomic approaches have been used to identify the main proteins present in processing by-products generated by the canning tuna-industry, as well as in by-products derived from filleting of skeletal red muscle of fresh tuna. Following fractionation by using an ammonium sulphate precipitation method, three proteins (tropomyosin, haemoglobin and the stress-shock protein ubiquitin) were identified in the highly heterogeneous and heat-treated material discarded by the canning-industry. Additionally, this fractionation method was successful to obtain tropomyosin of high purity from the heterogeneous starting material. By-products from skeletal red muscle of fresh tuna were efficiently fractionated to sarcoplasmic and myofibrillar fractions, prior to the identification based mainly on the combined searching of the peptide mass fingerprint (MALDI-TOF) and peptide fragment fingerprinting (MALDI LIFT-TOF/TOF) spectra of fifteen bands separated by 1D SDS-PAGE. Thus, the sarcoplasmic fraction contained myoglobin and several enzymes that are essential for efficient energy production, whereas the myofibrillar fraction had important contractile proteins, such as actin, tropomyosin, myosin or an isoform of the enzyme creatine kinase. Application of proteomic technologies has revealed new knowledge on the composition of important by-products from tuna species, enabling a better evaluation of their potential applications. Copyright © 2012 Elsevier Ltd. All rights reserved.

  8. Canned bluefin tuna, an in vitro cardioprotective functional food potentially safer than commercial fish oil based pharmaceutical formulations.

    Science.gov (United States)

    Tenore, Gian Carlo; Calabrese, Giorgio; Ritieni, Alberto; Campiglia, Pietro; Giannetti, Daniela; Novellino, Ettore

    2014-09-01

    Commercial canned fish species typical in the Italian market were evaluated for their lipid profile. Bluefin tuna samples showed the highest content in omega-3 fatty acids (n-3 PUFA) among the canned fish samples analyzed. Tests on H9C2 cardiomyocytes revealed that bluefin tuna n-3 PUFA may responsible for a significant cell protection against both physiological and doxorubicin-induced oxidative stress. Analogous tests performed by incubating cardiac cells with n-3 PUFA ethyl esters, of which most of fish oil pharmaceutical formulations (FOPF) are based, showed cytotoxicity at high doses. Our results highlighted that n-3 PUFA contents in a 50 g canned bluefin tuna portion would be almost equivalent to and potentially safer than those of 1 FOPF capsule (1000 mg)/die usually suggested for hyperlipidaemic subjects. Thus, Italian commercial canned bluefin tuna could be indicated as a functional food with potential health benefits for the prevention and care of cardiovascular disorders. Copyright © 2014 Elsevier Ltd. All rights reserved.

  9. Fisher-Level Decision Making to Participate in Fisheries Improvement Projects (FIPs) for Yellowfin Tuna in the Philippines

    NARCIS (Netherlands)

    Tolentino-Zondervan, F.; Berentsen, P.B.M.; Bush, S.R.; Oude Lansink, A.G.J.M.

    2016-01-01

    This study identifies the capabilities needed by small-scale fishers to participate in Fishery Improvement Projects (FIPs) for yellowfin tuna in the Philippines. The current literature provides little empirical evidence on how different models, or types of FIPs, influence the participation of

  10. Certification of total arsenic, dimethylarsinic acid and arsenobetaine contents in a tuna fish powder (BCR-CRM 627)

    DEFF Research Database (Denmark)

    Lagarde, F.; Amran, M. B.; Leroy, M. J. F.

    1999-01-01

    Tuna fishes were collected in the Straits of Messina (Italy), were dissected and dorsal muscles minced, freeze-dried, ground and sieved. The obtained powder was stabilised by gamma-irradiation and filled into brown glass bottles. The homogeneity and stability at +20 degrees C and +40 degrees C we...

  11. Determination of multi-element composition of Vietnamese marine sediment and tuna fish by k0-standardized neutron activation analysis

    International Nuclear Information System (INIS)

    Manh-Dung Ho; Quang-Thien Tran; Van-Doanh Ho; Thi-Sy Nguyen

    2016-01-01

    The k 0 -standardized neutron activation analysis (k 0 -NAA) has been applied for determination of multiple elements (25 elements: Al, As, Ba, Br, Ca, Cl, Co, Cr, Cs, Cu, Eu, Fe, Hg, K, La, Mg, Na, Rb, Sc, Se, Sm, Th, Ti, V and Zn) in marine sediment and tuna fish. About 50 marine sediment and 9 tuna fish samples were collected in two coastal areas of Vietnam. The health risk index (HRI) values of As and Br were higher than 1.0 for the tuna fish. Also, HRI value of Hg was 8.92 × 10 -1 indicating a relatively high potential health risk, whiles Co and Mn with HRIs = 1.56 × 10 -4 and 8.56 × 10 -4 , respectively, have the lowest potential health risks. Average enrichment factors using Al as a reference element (EF Al ) were higher than 1.5 for Eu, La, Zn, Th, Cs and As in which the highest EF Al value for As was higher than 10. This study showed that the HRI value of As in the tuna fish correlated positively with the EF Al value for the element in the marine sediment. (author)

  12. Substitutions in the Glycogenin-1 Gene Are Associated with the Evolution of Endothermy in Sharks and Tunas.

    Science.gov (United States)

    Ciezarek, Adam G; Dunning, Luke T; Jones, Catherine S; Noble, Leslie R; Humble, Emily; Stefanni, Sergio S; Savolainen, Vincent

    2016-10-05

    Despite 400-450 million years of independent evolution, a strong phenotypic convergence has occurred between two groups of fish: tunas and lamnid sharks. This convergence is characterized by centralization of red muscle, a distinctive swimming style (stiffened body powered through tail movements) and elevated body temperature (endothermy). Furthermore, both groups demonstrate elevated white muscle metabolic capacities. All these traits are unusual in fish and more likely evolved to support their fast-swimming, pelagic, predatory behavior. Here, we tested the hypothesis that their convergent evolution was driven by selection on a set of metabolic genes. We sequenced white muscle transcriptomes of six tuna, one mackerel, and three shark species, and supplemented this data set with previously published RNA-seq data. Using 26 species in total (including 7,032 tuna genes plus 1,719 shark genes), we constructed phylogenetic trees and carried out maximum-likelihood analyses of gene selection. We inferred several genes relating to metabolism to be under selection. We also found that the same one gene, glycogenin-1, evolved under positive selection independently in tunas and lamnid sharks, providing evidence of convergent selective pressures at gene level possibly underlying shared physiology. © The Author(s) 2016. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  13. Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna

    DEFF Research Database (Denmark)

    Huse, G.; MacKenzie, B. R.; Trenkel, V.

    2015-01-01

    The North Atlantic is a productive marine region which has supported important commercial fisheries for centuries. Many of these fisheries have exploited the pelagic species, including herring, blue whiting and tuna. Here we present data on the distribution of herring and blue whiting based on th...

  14. Seasonal Variations of Oceanographic Variables and Eastern Little Tuna (Euthynnus affinis) Catches in the North Indramayu Waters Java Sea

    Science.gov (United States)

    Syamsuddin, Mega; Sunarto; Yuliadi, Lintang

    2018-02-01

    The remotely derived oceanographic variables included sea surface temperature (SST), chlorophyll-a (Chl-a) and Eastern Little Tuna (Euthynnus affinis) catches are used as a combined dataset to understand the seasonal variation of oceanographic variables and Eastern Little Tuna catches in the north Indramayu waters, Java Sea. The fish catches and remotely sensed data were analysed for the 5 years datasets from 2010-2014. This study has shown the effect of monsoon inducing oceanographic condition in the study area. Seasonal change features were dominant for all the selected oceanographic parameters of SST and Chl-a, and also Eastern Little Tuna catches, respectively. The Eastern Little Tuna catch rates have the peak season from September to December (700 to 1000) ton that corresponded with the value of SST ranging from 29 °C to 30 °C following the decreasing of Chl-a concentrations in September to November (0.4 to 0.5) mg m-3. The monsoonal system plays a great role in determining the variability of oceanographic conditions and catch in the north Indramayu waters, Java Sea. The catches seemed higher during the northwest monsoon than in the southeast monsoon for all year observations except in 2010. The wavelet spectrum analysis results confirmed that Eastern Little Tuna catches had seasonal and inter-annual variations during 2012-2014. The SST had seasonal variations during 2010-2014. The Chl-a also showed seasonal variations during 2010-2011 and interannual variations during 2011-2014. Our results would benefit the fishermen and policy makers to have better management for sustainable catch in the study area.

  15. Trophic niches of sympatric tropical tuna in the Western Indian Ocean inferred by stable isotopes and neutral fatty acids

    Science.gov (United States)

    Sardenne, Fany; Bodin, Nathalie; Chassot, Emmanuel; Amiel, Aurélien; Fouché, Edwin; Degroote, Maxime; Hollanda, Stéphanie; Pethybridge, Heidi; Lebreton, Benoit; Guillou, Gaël; Ménard, Frédéric

    2016-08-01

    This study examined the trophic ecology of three sympatric tropical tuna species (bigeye BET, skipjack SKJ, and yellowfin YFT) sampled in the Western Indian Ocean throughout 2013. Specifically we explored inter-specific resource partitioning and ontogenetic variability using neutral fatty acids and stable isotope analysis of liver and muscle from small (⩽100 cm fork length, FL) and large (>100 cm FL) tuna collected in mixed schools at the surface by purse-seine. Both biochemical tracers were used to calculate trophic niche indices that collectively revealed high potential for resource overlap, especially among small tuna. Resource overlap appeared strongest between BET and YFT, with SKJ tissues having high carbon isotope (δ13C) values (-17 ± 0.3‰), lower nitrogen isotope (δ15N) values (11.4 ± 0.6‰), and higher relative proportion of poly-unsaturated fatty acids (PUFA) than the two other species, indicating a different diet. Size was found to be a strong predictor for most biochemical tracers in the three species with δ13C, δ15N and total lipid content in the liver. In the larger species (YFT and BET), proportions of mono-unsaturated fatty acids typically increased with size, while quantities of PUFA decreased. In addition to ontogenetic variability, trophic markers were shown to vary between sampling area and season: higher lipid reserves and δ15N values, and lower δ13C values occurred during monsoon periods around Seychelles than in the Mozambique Channel (parted from about 1500 km). Our multi-tracer approach reveals the magnitude of potential competitive interactions in mixed tropical tuna schools at both small and large sizes and demonstrates that ontogenetic niche differentiation acts as a major factor of coexistence in tropical tuna.

  16. A Satellite Imagery, Ecosystem-Based GIS Study of Bluefin Tuna and Right Whale Distribution and Movements in the Gulf of Marine and NW Atlantic

    National Research Council Canada - National Science Library

    Lutcavage, Molly

    2002-01-01

    The goals of this research were to develop a GIS workstation to examine the distribution, relative abundance, and behavior of Atlantic bluefin tuna and the Northern right whale in relation to their environment and prey...

  17. Genetic variation in skipjack tuna Katsuwonus pelamis (L.) using PCR-RFLP analysis of the mitochondrial DNA D-loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Menezes, M.R.; Ikeda, M.; Taniguchi, N.

    Journal of Marine and Freshwater Research 34, 231–251. Sharp, G. D. & Pirages, S. W. (1978). The distribution of enzymes of red, white and heart muscle: distributional characteristics in selected scombrid fishes. In The Physiological Ecology of Tunas...

  18. Study on the change of total fat content and fatty acid composition of the ethanol extract from cooking drips of thunnus thynnus by ionizing irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hee Sub; Choi, Jong Il; Kim, Hyun Joo; Kim, Jin Kyu; Byun, Myung Woo; Lee, Ju Woon [Team for Radiation Food Science and Biotechnology, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup (Korea, Republic of); Yoo, Cheon Woo; Kim, Ju Bong [Dongwon Research and Development Center, Seongnam (Korea, Republic of); Hwang, Young Jung [Division of Food Science, Jinju International University, Jinju (Korea, Republic of); Chung, Young Jin [Dept. of Food and Nutrition, Chungnam National University, Daejeon (Korea, Republic of)

    2008-05-15

    This study was conducted to examine the effect of a gamma irradiation (GM) and an electron-beam irradiation (EB) on the total fat content and fatty acid composition of ethanol extract from cooking drips of Thunnus thynnus (ECT). The total fat content of samples were determined by fat extraction (Folch method) and fatty acid composition was by gas chromatography mass spectrometry (GC-MS) after fat extraction. The results showed that total fat contents were not changed by GM and EB up to the dose of 50 kGy. The content of unsaturated fatty acids (USFA) such as vaccenic acid and DHA, was decreased by irradiation. But, the content of palmitoleic acid was not changed by GM. In contrast, the content of saturated fatty acids(SFA) such as myristic acid and palmitic acid, was increased by the irradiation. But, the content of stearic acid was decreased with the increase of irradiation dose. Also, it has been shown that the GM had further affected the change of fatty acid content than EB.

  19. Study on the change of total fat content and fatty acid composition of the ethanol extract from cooking drips of thunnus thynnus by ionizing irradiation

    International Nuclear Information System (INIS)

    Lee, Hee Sub; Choi, Jong Il; Kim, Hyun Joo; Kim, Jin Kyu; Byun, Myung Woo; Lee, Ju Woon; Yoo, Cheon Woo; Kim, Ju Bong; Hwang, Young Jung; Chung, Young Jin

    2008-01-01

    This study was conducted to examine the effect of a gamma irradiation (GM) and an electron-beam irradiation (EB) on the total fat content and fatty acid composition of ethanol extract from cooking drips of Thunnus thynnus (ECT). The total fat content of samples were determined by fat extraction (Folch method) and fatty acid composition was by gas chromatography mass spectrometry (GC-MS) after fat extraction. The results showed that total fat contents were not changed by GM and EB up to the dose of 50 kGy. The content of unsaturated fatty acids (USFA) such as vaccenic acid and DHA, was decreased by irradiation. But, the content of palmitoleic acid was not changed by GM. In contrast, the content of saturated fatty acids(SFA) such as myristic acid and palmitic acid, was increased by the irradiation. But, the content of stearic acid was decreased with the increase of irradiation dose. Also, it has been shown that the GM had further affected the change of fatty acid content than EB

  20. Population genetic structure of skipjack tuna Katsuwonus pelamis from the Indian coast using sequence analysis of the mitochondrial DNA D-loop region

    Digital Repository Service at National Institute of Oceanography (India)

    Menezes, M.R.; Kumar, G.; Kunal, S.P.

    Biology (2012) 80, 2198–2212 doi:10.1111/j.1095-8649.2012.03270.x, available online at wileyonlinelibrary.com Population genetic structure of skipjack tuna Katsuwonus pelamis from the Indian coast using sequence analysis of the mitochondrial DNA D...-loop region M. R. Menezes*, G. Kumar and S. P. Kunal Biological Oceanography Division, National Institute of Oceanography (CSIR), Dona Paula, Goa 403 004, India (Received 26 May 2011, Accepted 14 February 2012) Genetic structure of skipjack tuna Katsuwonus...

  1. Assessment of radioactive elements in canned tuna marketed in Saudi Arabia after Fukushima accident

    International Nuclear Information System (INIS)

    Alkhomashi, N.; Alyousif, A.A.S.; Walied Alotibi; Alkhorayef, M.A.

    2016-01-01

    In the current study, 32 brands of canned tuna that were purchased in supermarkets in Riyadh, Saudi Arabia were analysed to quantify the activity levels of 137 Cs, 134 Cs and 40 K. These samples were processed in Japan, the Philippines, Thailand, Europe and the Middle East in 2011 and 2012. The samples were analysed using high-resolution gamma-ray spectroscopy. The highest activity concentrations of all three radionuclides were obtained in the samples that were processed in Japan in 2011 a few months after the Fukushima Daiichi accident. However, the activity concentrations of radiocaesium in all the samples in this study were far below the limit for food and beverages of 100 Bq/kg, which is the standard limit in the Japan. (author)

  2. Hydraulic control of tuna fins: A role for the lymphatic system in vertebrate locomotion.

    Science.gov (United States)

    Pavlov, Vadim; Rosental, Benyamin; Hansen, Nathaniel F; Beers, Jody M; Parish, George; Rowbotham, Ian; Block, Barbara A

    2017-07-21

    The lymphatic system in teleost fish has genetic and developmental origins similar to those of the mammalian lymphatic system, which is involved in immune response and fluid homeostasis. Here, we show that the lymphatic system of tunas functions in swimming hydrodynamics. Specifically, a musculo-vascular complex, consisting of fin muscles, bones, and lymphatic vessels, is involved in the hydraulic control of median fins. This specialization of the lymphatic system is associated with fish in the family Scombridae and may have evolved in response to the demand for swimming and maneuvering control in these high-performance species. Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.

  3. Petrological and geochemical studies of alkaline rocks from continental Brazil. The tunas massif, state of Parana

    International Nuclear Information System (INIS)

    Gomes, C.B.; Barbieri, M.

    1987-01-01

    The Tunas massif, outcropping 80 km from the city of Curitiba, Parana State, southern Brazil, covers about 22 km 2 . It intruded into Precambrian metaigneous and metasedimentary units about 80 Ma ago (K/Ar and Rb/Sr data); five subcircular volcanic structures are recognized. Syenites and alkali syenites (plus some pulaskites) are the main rock-types, with subordinate alkali gabbros, syenogabbros, essexites and syenodiorites; small late syenitic dikes are also found. Magmatic breccias containing clasts of all rock-types are widespread. Main minerals are feldspars (both alkali feldspars and plagioclases, varying from bytownite to more sodic members), Ca-pyroxenes (Ti-salites grading towards ferrosalites and aegirine-augites), amphiboles (mainly pargasites, although kaersutites and katophorites are also present), Fe-biotites (sometimes enriched in Ti), olivines (hortonolites to ferrohortonolites), quartz and feldspathoids (both fresh and altered nephelines and sodalites); main accessories are Ti-magnetites (with exsolved ilmenite) and apatite. In the AFM diagram, whole rock chemistry depicts a typical alkaline trend. Binary variation diagrams (D.I. vs. several elements) show positive correlation for Si, Na and K, and negative slopes for Mg and Ca. The variation in the amounts of Ni, Cr and V with differentiation can be explained by withdrawal of olivine, Ca-pyroxenes and magnetite, and that of Sr and Ba by the fractionation of feldspars. The rocks are also relatively enriched in REE, a trend which is more pronounced for the light REE. Mass balance calculations show that the overall differentiation trend of the Tunas rocks can be explained by crystal fractionation, although several complexities arise and point to more complex genetic patterns. Isotopic Rb/Sr ratios are consistent with a mantle origin for the parental magma; dike rocks, however, with 87 Sr 86 Sr i = 0.70777 - 0.70806, were probably contaminated by crustal material. (author) [pt

  4. Incidencia prenatal de los defectos congénitos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Juana Lupe Muñoz Callol

    2015-04-01

    Full Text Available Los defectos congénitos son la principal causa de morbilidad y mortalidad neonatal en casi todo el mundo. La introducción del diagnóstico prenatal y el establecimiento de estrategias preventivas en la atención primaria de salud han logrado la disminución de la prevalencia al nacimiento de defectos congénitos y de la mortalidad infantil en nuestro país. Se realizó un estudio descriptivo de corte transversal de los casos diagnosticados o confirmados prenatalmente en la consulta de genética provincial, con el objetivo de describir la incidencia prenatal de los defectos congénitos en la provincia Las Tunas, durante el período de enero 2013 a mayo 2014. De un universo de 9462 embarazadas de la provincia, en el periodo de estudio; se escogió una muestra de 110 gestantes que presentaron defectos fetales en diferentes órganos y sistemas. La información se obtuvo del registro provincial, donde se analizaron las variables: comportamiento de defectos congénitos por áreas de salud, edad de las madres por defectos congénitos, defectos congénitos por programas prenatales y los defectos congénitos por sistemas. El mayor número de casos se diagnosticó en el segundo trimestre del embarazo, siendo el sistema cardiovascular donde se encontró un número mayor de defectos congénitos, seguido del sistema digestivo, genitourinarias y del sistema nervioso central. Las edades maternas estuvieron comprendidas entre 21 y 30 años, siendo el municipio Tunas el que aportó un número significativo de afectados

  5. Towards sustainable mobile systems configurations: Application to a tuna purse seiner.

    Science.gov (United States)

    García Rellán, A; Vázquez Brea, C; Bello Bugallo, P M

    2018-08-01

    Fishing is one of the most important marine activities. It contributes to both overfishing and marine pollution, the two main threats to the ocean environment. In this context, the aim of this work is to investigate and validate methodologies for the identification of more sustainable operating configurations for a tuna purse seiner. The proposed methodology is based on a previous one applied to secondary industrial systems, taking into account the Integrated Pollution Prevention and Control focus, developed for the most potentially industrial polluting sources. The idea is to apply the same type of methodologies and concepts used for secondary industrial punctual sources, to a primary industrial mobile activity. This methodology combines two tools: "Material and Energy Flow Analysis" (a tool from industrial metabolism), and "Best Available Techniques Analysis". The first provides a way to detect "Improvable Flows" into de system, and the second provides a way to define sustainable options to improve them. Five main Improvable Flows have been identified in the selected case study, the activity of a purse seiner, most of them related with energy consumption and air emission, in different stages of the fishing activity. Thirty-one Best Available Techniques candidates for the system have been inventoried, that potentially could improve the sustainability of the activity. Seven of them are not implemented yet to the case study. The potential improvements of the system proposed by this work are related to energy efficiency, waste management, prevention and control of air emissions. This methodology demonstrates to be a good tool towards sustainable punctual systems, but also towards sustainable mobile systems such as the fishing activity in oceans, as the tuna purse seiner validated here. The practical application of the identified technologies to fishing systems will contribute to prevent and reduce marine pollution, one of the greatest threats of today's oceans

  6. Halimeda tuna

    African Journals Online (AJOL)

    cas

    Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, ... secondary metabolites characterised by a broad spectrum of biological ... 4°C. These bacterial and fungal strains were isolated and obtained.

  7. Factores de discriminación y tasas de renovación isotópica de nitrógeno en larvas de atún rojo de cultivo (Thunnus thynnus): efectos de la transferencia materna

    OpenAIRE

    Uriarte, Amaya; García, Alberto; Ortega, Aurelio; de la Gándara, Fernando; Quintanilla, José; Laiz-Carrión, Raúl

    2016-01-01

    El análisis de isótopos estables para estudiar la dieta de los animales requiere estimaciones de las tasas de rotación isotópicas (tiempo medio, t50) y factores de discriminación (Δ) para una correcta interpretación de los patrones tróficos. Los isótopos estables de carbono y nitrógeno se analizaron en los huevos y larvas criadas de Thunnus thynnus, así como para las diferentes dietas suministradas durante el experimento. Los resultados mostraron altos valores de δ15N en huevos y larvas (n=64...

  8. Entrenamiento: “Cambios ontogénicos a la tolerancia de estresores a bajas y altas temperaturas en larvas y juveniles de PBT (Thunnus orientalis).” Nara, Japón 2015

    OpenAIRE

    Villarreal, Yazmin

    2015-01-01

    Dentro de las actividades a desarrollar bajo el marco del Proyecto “Estudio comparativo de la biología reproductiva y del ciclo vital temprano del atún aleta amarilla y el atún aleta azul para el manejo de estos recursos”, se estableció un plan de trabajo, donde incluía el entrenamiento técnico-científico del personal de la Autoridad de los Recursos Acuáticos de Panamá (ARAP). Se acordó las visitas para realizar ensayos con esta especie en las Estaciones de cultivo de atún aleta azul (Thunnus...

  9. Assessment of the Long-tailed Goral (Naemorhedus caudatus: Bovidae population status in the Sikhote-Alin Reserve using camera-traps

    Directory of Open Access Journals (Sweden)

    Olga Yu. Zaumyslova

    2017-05-01

    Full Text Available The Long-tailed goral (Naemorhedus caudatus is a rare mountain ungulate animal species with a mosaic range. In the Sikhote-Alin Reserve, the goral is located at the northern limit of its distribution. The main part of its population is concentrated in the coastal area, in the Abrek natural landmark. In the early XX century, the goral occupied another small area along the coast – 20 km south of the Abrek natural landmark. Currently, the total area of species' habitats is only 7.1 km2. The aim of this study was to assess the population size, population density and some demographic parameters of the goral population. Also, we aimed to evaluate the effectiveness of the photo-trap method which is a new approach to the study and monitoring of this rare species. Accounting studies in the Abrek natural landmark were carried out in October 2014 – January 2015 (1401 trap-days; also, at the same time we worked in the second area during three seasons (2014–2017, 1326 trap-days. Estimation of the abundance and annual survival of the goral has been carried out using stochastic «capture – recapture» models presented in the software MARK. In the Abrek natural landmark for an effective area of 4 km2 (63% of this habitat's area, the average density of the goral population was 15.4 animals per km2 (CI 95% = 14.6–18.2 individuals per km2, in the second area (0.7 km2 completely accounted – 21.0 individuals per km2 (CI 95% = 20.1–28.6 individuals per km2. The total abundance of goral individuals in the Reserve remains, apparently, at the level of the late 1980s. And currently it is about 110–140 individuals. According to our preliminary data, the total annual survival in the first year was 0.73 (CI 95% = 0.41–0.91, and by the end of the second year it was 0.72 (CI 95% = 0.31–0.93. Female animals have prevailed in the population structure, and the sex ratio for adult animals was 1:1.5. The fertility rate was 0.61. In comparison with the data

  10. The Tunas Formation (Permian) in the Sierras Australes foldbelt, east central Argentina: evidence for syntectonic sedimentation in a foreland basin

    Science.gov (United States)

    Lopez-Gamundi, O. R.; Conaghan, P. J.; Rossello, E. A.; Cobbold, P. R.

    1995-04-01

    The Tunas Formation, extensively exposed in the Sierras Australes foldbelt of eastern central Argentina, completes the sedimentation of the Gondwanan (Late Carboniferous-Permian) sequence, locally known as the Pillahuincó Group. The underlying units of the Group show an integrated depositional history which can be explained in terms of glaciomarine sedimentation (Sauce Grande Formation) and postglacial transgression (Piedra Azul and Bonete Formations). This succession also has a rather uniform quartz-rich, sand-sized composition indicative of a cratonic provenance from the Tandilia Massif to the northeast. Early to Late Permian deformation folded and thrusted the southwestern basin margin (Sierras Australes) and triggered the deposition of a 1,500 m — thick, synorogenic prograding wedge, the Tunas Formation, in the adjacent foreland basin (Sauce Grande or Claromecó Basin). Sandstone detrital modes for the Tunas deposits show moderate to low contents of quartz and abundant lithics, mostly of volcanic and metasedimentary origin. Paleocurrents are consistently from the SW. Tuffs interbedded with sandstones in the upper half of Tunas Formation (Early — early Late? Permian) are interpreted as being derived from volcanic glass-rich tuffs settled in a body of water. Extensive rhyolitic ignimbrites and consanguineous airborne tuffaceous material erupted in the northern Patagonian region during that period. The age constraints and similarities in composition between these volcanics and the tuffaceous horizons present in the Sauce Grande, Parana and Karoo Basins suggest a genetic linkage between these two episodes. The intimate relationship between volcanic activity inboard of the paleo-Pacific margin, deformation in the adjacent orogenic belt and subsidence and sedimentation in the contiguous foreland basin constitutes a common motif in the Sauce Grande and Karoo Basins of southwestern Gondwana.

  11. Distribution and transportability of hexabromocyclododecane (HBCD) in the Asia-Pacific region using skipjack tuna as a bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, Daisuke [National Water Research Institute, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington ON L7R 4A6 (Canada) and Center for Marine Environmental Studies (CMES), Ehime University, Ehime (Japan)]. E-mail: ueno@qg8.so-net.ne.jp; Alaee, Mehran [National Water Research Institute, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington ON L7R 4A6 (Canada); Marvin, Chris [National Water Research Institute, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington ON L7R 4A6 (Canada); Muir, Derek C.G. [National Water Research Institute, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington ON L7R 4A6 (Canada); Macinnis, Gordia [National Water Research Institute, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington ON L7R 4A6 (Canada); Reiner, Eric [Ontario Ministry of the Environment, Toronto, ON (Canada); Crozier, Patrick [Ontario Ministry of the Environment, Toronto, ON (Canada); Furdui, Vasile I. [Ontario Ministry of the Environment, Toronto, ON (Canada); Subramanian, Annamalai [Center for Marine Environmental Studies (CMES), Ehime University, Ehime (Japan); Fillmann, Gilberto [Department of Oceanography, Fundacao Universidade Federal do Rio Grande, Rio Grande (Brazil); Lam, Paul K.S. [Department of Biology and Chemistry, City University of Hong Kong (Hong Kong); Zheng, Gene J. [Department of Biology and Chemistry, City University of Hong Kong (Hong Kong); Muchtar, Muswerry [Research and Development Center for Oceanology, Indonesian Institute of Sciences, Jakarta (Indonesia); Razak, Hamidah [Research and Development Center for Oceanology, Indonesian Institute of Sciences, Jakarta (Indonesia); Prudente, Maricar [Science Education Department, De La Salle University, Manila (Philippines); Chung, Kyu-hyuck [College of Pharmacy, Sungkyunkwan University, Seoul, South Korea (Korea); Tanabe, Shinsuke [Center for Marine Environmental Studies (CMES), Ehime University, Ehime (Japan)

    2006-11-15

    The geographical distribution of hexabromocyclododecane (HBCD) was investigated through analysis of muscle tissue of skipjack tuna (Katsuwonus pelamis) collected from offshore waters of Asia-Pacific region (Japan, Taiwan, Philippines, Indonesia, Seychelles, Brazil, Japan Sea, East China Sea, South China Sea, Indian Ocean and North Pacific Ocean). HBCD was detected in almost all samples analyzed (<0.1 to 45 ng/g lipid weight basis), indicating widespread presence of this compound in the marine environment. Elevated concentrations of HBCD were found in skipjack tuna from areas around Japan, which have the larger modern industrial/urban societies, and implicated these areas as primary regional sources. All three individual HBCD isomers ({alpha}-, {gamma}- and {beta}-HBCD) were detected in almost all samples; the percentage contribution of the {alpha}-isomer to total HBCD increased with increasing latitude. The estimated empirical 1/2 distance for {alpha}-HBCD was 8500 km, which is one of the highest atmospheric transportability among various halogenated persistent organic pollutants (POPs). - Geographical distribution of hexabromocyclododecane (HBCD) in offshore water of Asia-Pacific region was investigated using skipjack tuna as a bioindicator.

  12. Distribution and transportability of hexabromocyclododecane (HBCD) in the Asia-Pacific region using skipjack tuna as a bioindicator

    International Nuclear Information System (INIS)

    Ueno, Daisuke; Alaee, Mehran; Marvin, Chris; Muir, Derek C.G.; Macinnis, Gordia; Reiner, Eric; Crozier, Patrick; Furdui, Vasile I.; Subramanian, Annamalai; Fillmann, Gilberto; Lam, Paul K.S.; Zheng, Gene J.; Muchtar, Muswerry; Razak, Hamidah; Prudente, Maricar; Chung, Kyu-hyuck; Tanabe, Shinsuke

    2006-01-01

    The geographical distribution of hexabromocyclododecane (HBCD) was investigated through analysis of muscle tissue of skipjack tuna (Katsuwonus pelamis) collected from offshore waters of Asia-Pacific region (Japan, Taiwan, Philippines, Indonesia, Seychelles, Brazil, Japan Sea, East China Sea, South China Sea, Indian Ocean and North Pacific Ocean). HBCD was detected in almost all samples analyzed (<0.1 to 45 ng/g lipid weight basis), indicating widespread presence of this compound in the marine environment. Elevated concentrations of HBCD were found in skipjack tuna from areas around Japan, which have the larger modern industrial/urban societies, and implicated these areas as primary regional sources. All three individual HBCD isomers (α-, γ- and β-HBCD) were detected in almost all samples; the percentage contribution of the α-isomer to total HBCD increased with increasing latitude. The estimated empirical 1/2 distance for α-HBCD was 8500 km, which is one of the highest atmospheric transportability among various halogenated persistent organic pollutants (POPs). - Geographical distribution of hexabromocyclododecane (HBCD) in offshore water of Asia-Pacific region was investigated using skipjack tuna as a bioindicator

  13. Cadmium, lead, tin, total mercury, and methylmercury in canned tuna commercialised in São Paulo, Brazil.

    Science.gov (United States)

    de Paiva, Esther Lima; Morgano, Marcelo Antonio; Milani, Raquel Fernanda

    2017-09-01

    The objective of this work was to determine levels of inorganic contaminants in 30 samples of five commercial brands of canned tuna, acquired on the local market in Campinas, São Paulo, Brazil, in the year of 2015. Total mercury and methylmercury (MeHg+) were determined by atomic absorption with thermal decomposition and amalgamation; and cadmium, lead, and tin were determined by inductively coupled plasma optical emission spectrometry. Results indicated that 20% of the tuna samples surpassed limits determined by the Brazilian and European Commission legislation for cadmium; for lead, the maximum value found was 59 µg kg -1 and tin was not detected in any samples. The maximum values found for total Hg and MeHg+ were 261 and 258 µg kg -1 , respectively. As from the results obtained, it was estimated that the consumption of four cans per week (540 g) of tuna canned in water could surpass the provisional tolerable monthly intake for MeHg + by 100%.

  14. First attempt to assess the viability of bluefin tuna spawning events in offshore cages located in an a priori favourable larval habitat

    Directory of Open Access Journals (Sweden)

    Patricia Reglero

    2013-10-01

    Full Text Available Most of the Atlantic bluefin tuna caught by the purse-seine fleet in the Mediterranean Sea are transferred alive into transport cages and towed to coastal facilities where they are fattened. This major fishery is targeting aggregations of reproductive bluefin tuna that continue spawning within the transport cages. Our study is the first attempt to assess the viability of the spawning events within transport cages placed offshore in a priori favourable locations for larval survival. The study was conducted in June 2010 in the Balearic Sea, a main spawning area for bluefin tuna in the Mediterranean. The location of two transport cages, one with wild and one with captive tuna, coincide with the situation of the chlorophyll front using satellite imagery as a proxy for the salinity front between resident surface waters and those of recent Atlantic origin. The results showed that bluefin tuna eggs were spawned almost every day within the two cages but few or no larvae were found. The expected larval densities estimated after applying mortality curves to the daily egg densities observed in the cages were higher than the sampled larval densities. The trajectories of the eggs after hatching estimated from a particle tracking model based on observed geostrophic currents and a drifter deployed adjacent to the cage suggest that larvae were likely to be caught close to the cages within the sampling dates. Spawning events in captive tuna in transport cages may hatch into larvae though they may experience higher mortality rates than expected in natural populations. The causes of the larval mortality are further discussed in the text. Such studies should be repeated in other spawning areas in the Mediterranean if spawning in cages located offshore in areas favourable a priori for larval survival is likely to be considered a management measurement to minimize the impact of purse-seine fishing on tuna.

  15. Stereological comparison of oocyte recruitment and batch fecundity estimates from paraffin and resin sections using spawning albacore (Thunnus alalunga) ovaries as a case study

    Science.gov (United States)

    Saber, Sámar; Macías, David; Ortiz de Urbina, Josetxu; Kjesbu, Olav Sigurd

    2015-01-01

    Traditional histological protocols in marine fish reproductive laboratories using paraffin as the embedding medium are now increasingly being replaced with protocols using resin instead. These procedures entail different degrees of tissue shrinkage complicating direct comparisons of measurement results across laboratories or articles. In this work we selected ovaries of spawning Mediterranean albacore (Thunnus alalunga) as the subject of our study to address the issue of structural changes, by contrasting values on oocyte recruitment and final batch fecundity given from the same tissue samples in both paraffin and resin. A modern stereological method, the oocyte packing density (OPD) theory, was used supported by initial studies on ovarian tissue sampling and measurement design. Examples of differences in the volume fraction of oocyte stages, free space and connective tissue were found between the embedding media. Mean oocyte diameters were smaller in paraffin than in resin with differences ranging between 0.5% in primary growth and 24.3% in hydration (HYD) stage oocytes. Fresh oocyte measurements showed that oocytes shrank as a consequence of the embedding process, reaching the maximal degree of shrinkage for oocytes in the HYD stage (45.8% in paraffin and 26.5% in resin). In order to assess the effect of oocyte shrinkage on the OPD result, and thereby on relative batch fecundity (Fr), oocyte diameters corrected and uncorrected for shrinkage, were used for estimations. Statistical significant differences were found (P based on either oocytes in the germinal vesicle migration stage or HYD stage. As a valuable adjunct, the present use of the OPD theory made it possible to document that the oocyte recruitment of spawning ovaries of Mediterranean albacore followed the typical pattern of an asynchronous oocyte development and indeterminate fecundity.

  16. THE SEASONAL VARIABILITY OF CPUE AND CATCH-AT-SIZE DISTRIBUTION OF TROLL AND HANDLINE TUNA FISHERIES LANDED IN LABUHAN LOMBOK

    Directory of Open Access Journals (Sweden)

    Bram Setyadji

    2016-12-01

    Full Text Available Troll and hand line tuna fisheries is one of the major fishing gears landed in Labuhan Lombok coastal fishing port (PPP Labuhan Lombok west Nusa Tenggara Barat province.  Both fisheries are strongly associated with fish aggregating devices (FAD’s. The main fishing ground is Indian Ocean southern part of this province.  Several source of data has been collected regularly. Data analysis comprised of monthlycatch and effort data samples based onport monitoring program during 2012 to 2015. The result showed the diclining of CPUE of yellow fin and skipjack tuna presumably related to fishing intensity of fleets and its variability that landed in PPP Labuhan Lombok.  The increasing CPUE of skipjack tuna in 2014 was predicted due to increasing aggregation around the FADs. Constrasting seasonal fishing index pattern between yellowfin and skipjack tuna foundin 4-month cycles, started in January.A length-weight relationship suggested that yellowfin tuna caught bysmall-scale fisheries were performing allometric growth pattern (b=2.963, r2=0.9737.

  17. Yellowfin Tuna (Thunnusalbacares Fishing Ground Forecasting Model Based On Bayes Classifier In The South China Sea

    Directory of Open Access Journals (Sweden)

    Zhou Wei-feng

    2017-08-01

    Full Text Available Using the yellowfin tuna (Thunnusalbacares,YFTlongline fishing catch data in the open South China Sea (SCS provided by WCPFC, the optimum interpolation sea surface temperature (OISST from CPC/NOAA and multi-satellites altimetric monthly averaged product sea surface height (SSH released by CNES, eight alternative options based on Bayes classifier were made in this paper according to different strategies on the choice of environment factors and the levels of fishing zones to classify the YFT fishing ground in the open SCS. The classification results were compared with the actual ones for validation and analyzed to know how different plans impact on classification results and precision. The results of validation showed that the precision of the eight options were 71.4%, 75%, 70.8%, 74.4%, 66.7%, 68.5%, 57.7% and 63.7% in sequence, the first to sixth among them above 65% would meet the practical application needs basically. The alternatives which use SST and SSH simultaneously as the environmental factors have higher precision than which only use single SST environmental factor, and the consideration of adding SSH can improve the model precision to a certain extent. The options which use CPUE’s mean ± standard deviation as threshold have higher precision than which use CPUE’s 33.3%-quantile and 66.7%-quantile as the threshold

  18. Anaerobic digestion of tuna waste for the production of volatile fatty acids.

    Science.gov (United States)

    Bermúdez-Penabad, Noela; Kennes, Christian; Veiga, Maria C

    2017-10-01

    Fish canning industries generate a significant amount of solid waste that can be digested anaerobically into volatile fatty acids (VFA). The aim of this research was to study the effect of various pHs, ranging from 5.0 to 10.0, and percentage of total solids on the anaerobic digestion of tuna waste into VFA, both in batch assays and continuous reactor. The production of VFA was affected by pH and was significantly higher under alkaline conditions. At pH 8.0, the VFA production reached 30,611mgCOD/L. The VFA mainly consisted of acetic, propionic, n-butyric and i-valeric acids. Acetic acid was the main product at all the pHs tested. In terms of total solids (TS) the best results were obtained with 2.5% total solids, reaching 0.73gCOD VFA /gCOD waste . At higher TS concentrations (5 and 8% TS) lower yields were reached probably due to inhibition at high VFA concentration. Copyright © 2017 Elsevier Ltd. All rights reserved.

  19. Pertinencia del esquema terapéutico antimicrobiano en las infecciones del tracto urinario, Las Tunas

    Directory of Open Access Journals (Sweden)

    Maité Rúa del Toro

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, de utilización de medicamentos de tipo indicación-prescripción con elementos de esquema terapéutico, con el objetivo de evaluar la pertinencia del esquema terapéutico de antimicrobianos, para el tratamiento de las infecciones del tracto urinario en la atención primaria de salud en el municipio Las Tunas, en el período comprendido entre enero a diciembre de 2012. El universo estuvo constituido por el total de pacientes con prescripción médica de antimicrobianos por impresión diagnóstica de sepsi o infección urinaria, la muestra fue de 120 pacientes. Los datos se obtuvieron de fuentes primarias y secundarias, procesados por estadística descriptiva, a través del análisis porcentual.  Las infecciones del tracto urinario, baja y alta no complicadas, fueron las que más afectaron a la población. Los antimicrobianos más utilizados: cotrimoxazol, ciprofloxacina y ácido nalidíxico. A la mayoría de los pacientes se les prescribieron terapéuticas antimicrobianas no pertinentes, debido a la selección inadecuada.

  20. Morbidity rate due to renal malformations in patients from Las Tunas province

    Directory of Open Access Journals (Sweden)

    Silvio Laffita Estévez

    2015-09-01

    Full Text Available Background: The urogenital congenital malformations represent the first place within the genetic malformations in the province of Las Tunas.Objective: To characterize the renal congenital malformations in pediatric patients of the herein mentioned province, from 2010 to 2014.Methods: A descriptive study was carried out with 283 paediatric patients with renal and urinary tract congenital malformation, in the province and period herein stated. The variables included: sex, clinical manifestations, more frequent malformations, which of them needed surgical treatment, the positive results of the radiological studies, and the malformations that developed into chronic renal failure. The data were analyzed according to descriptive statistics.Results: The male sex represented a 63,96 %. A 57,95 % of the children were asymptomatic. Within the congenital malformations ectasia prevailed with a 49,47 %. 100 % of the cases with a compromise of the ureteovesiccal union, ureterocele and shell of the posterior urethra, 78 % of the patients with stenosis of the ureteropyelic union and 4,76 % of the patients with vesicoureteric reflux needed surgical treatment. The radiological studies were highly positive. 1,41 % of the patients developed chronic renal failure.Conclusions: Most of the patients with renal and urinary tract congenital malformations were diagnosed before the 5 years of age. Only four patients developed chronic renal failure.

  1. Post-column derivatization capillary electrochromatography for detection of biogenic amines in tuna-meat.

    Science.gov (United States)

    Oguri, Shigeyuki; Okuya, Yukie; Yanase, Yukiko; Suzuki, Sayaka

    2008-08-15

    A system to perform post-column derivatization capillary electrochromatography (CEC) was developed for the first time. The system mainly included a 4-microm (O.D.) silica packed column (200 mm effective length x 0.1 mm inner diameter I.D.) with micro-magnetic particles (MMPs) frits, a T-junction connector, an in-line fluorescence detector and a high-voltage power supply. The system was evaluated by using histamine (HA) as a standard biogenic amine for this study. A 5 microM HA solution was loaded at the anodic site of the capillary column by applying 3 kV for 5s. Then, HA was electrophoretically eluted with a 20mM phosphate buffer (pH 7) by applying 3 kV, and was derivatized with 3mM o-phthalaldehyde (OPA)/N-acetylcysteine (NAC) in 100 mM borate (pH 10), which was continuously delivered through the reagent-loading capillary tube by gravity into the T-junction connector. HA derivative was finally detected with the in-line fluorescence detector (lambda(Ex)=340 nm, lambda(Em)=450 nm) at 9.7 min after sample loading. To test the utility of this system, it was next employed for its ability to detect the presence of HA and other kinds of biogenic amines, including cadaverine (Cad), spermidine (Spm) and tyramine (Tyr) in tuna-meat, once the validity of the method had been confirmed.

  2. Characteristics and nutritional value of whole wheat cracker fortified with tuna bone bio-calcium powder.

    Science.gov (United States)

    Benjakul, Soottawat; Karnjanapratum, Supatra

    2018-09-01

    Whole wheat cracker fortified with tuna bone bio-calcium (Bio-Ca) powder was developed as health-promoting food rich in calcium. Fortification with different levels of Bi-Ca, over the range of 0-50% of whole wheat flour (w/w) on quality and sensory properties of crackers, were determined. Color, thickness, weight and textural properties of crackers varied with the different levels of Bio-Ca powder added, but it was found that up to 30% could be added without detrimental effect on sensory properties. Scanning electron microscopic images showed that the developed crackers were less porous and had a denser structure, compared to the control. Based on scanning electron microscopy-energy dispersive X-ray spectroscopic (SEM-EDX), the cracker containing Bio-Ca powder had calcium and phosphorous distribution with higher intensity, compared to the control. The fortified crackers were rich in calcium and phosphorous with higher protein content but lower fat, carbohydrate, cholesterol and energy value, compared to the control. Copyright © 2018 Elsevier Ltd. All rights reserved.

  3. Banning is not enough: The complexities of oceanic shark management by tuna regional fisheries management organizations

    Directory of Open Access Journals (Sweden)

    Mariana Travassos Tolotti

    2015-07-01

    Full Text Available Recently, declining populations of several pelagic shark species have led to global conservation concerns surrounding this group. As a result, a series of species-specific banning measures have been implemented by Regional Fishery Management Organizations (RFMOs in charge of tuna fisheries, which include retention bans, finning bans and trading bans. There are both positive and negative aspects to most management measures, but generally, the positive aspects outweigh the negatives, ensuring the measure is beneficial to the resource and its users in the long term. Banning measures are a good first step towards the conservation of pelagic shark species, especially since they improve conservation awareness among fishers, managers and the public. Measures that impose total bans, however, can lead to negative impacts that may jeopardize the populations they were intended to protect. The majority of pelagic shark catches are incidental and most sharks die before they reach the vessel or after they are released. The legislation set out by RFMOs only prevents retention but not the actual capture or the mortality that may occur as a result. Managers should be fully aware that the development and implementation of mitigation measures are critical for a more effective conservation strategy.

  4. Arte, cultura y lucha contra el cáncer en Las Tunas

    Directory of Open Access Journals (Sweden)

    Juan Ernesto Pérez Reyes

    2014-08-01

    Full Text Available Los avances científicos de hoy están permitiendo que el cáncer no se convierta en una sentencia inexorable de muerte. La cronificación del tratamiento plantea retos a los sistemas sanitarios, en su compromiso por ofrecer al enfermo el apoyo para enfrentar su nueva situación y devolverlo a la vida normal. Las complicaciones producto de los tratamientos, los efectos físicos secundarios, la modificación de las rutinas y el sentir que se vive bajo una amenaza, desestabilizan el balance emocional de muchos enfermos. El arte puede captar los más personales aspectos en la experiencia del cáncer. La creación artística puede unir a pacientes, familiares, amigos, al equipo sanitario y a la comunidad en su conjunto, aportando nuevos caminos para ayudar al paciente. La labor artística puede proveer de otros modos de expresión que no se encuentran en las formas tradicionales de tratamiento, permitiendo explorar temas intrínsecos del enfermo de forma creativa y personal. El arte puede comunicar con los aspectos más silenciados de la enfermedad, ayudando a las personas con escasas posibilidades para confesar sus experiencias. Bajo esta premisa el recientemente fundado capítulo provincial de la Sociedad cubana de oncología, radioterapia y medicina nuclear ha efectuado en Las Tunas varias actividades a partir del día tres de febrero del actual año, comenzando con la inauguración de la Jornada provincial de lucha contra el cáncer. La estrategia divulgativa contó con la colaboración del Grupo provincial para el control del cáncer, el Centro provincial del cine y el proyecto FILOARTMED de la Universidad médica de Las Tunas, quienes se han interesado en elevar la producción científica de los profesionales de la salud, que luchan por controlar el cáncer en el territorio. En la sala cinematográfica Titón del Teatro Tunas, se dieron cita los miembros del capítulo provincial de la Sociedad cubana de oncología, radioterapia y medicina

  5. Genetic Structure of Bluefin Tuna in the Mediterranean Sea Correlates with Environmental Variables

    Science.gov (United States)

    Riccioni, Giulia; Stagioni, Marco; Landi, Monica; Ferrara, Giorgia; Barbujani, Guido; Tinti, Fausto

    2013-01-01

    Background Atlantic Bluefin Tuna (ABFT) shows complex demography and ecological variation in the Mediterranean Sea. Genetic surveys have detected significant, although weak, signals of population structuring; catch series analyses and tagging programs identified complex ABFT spatial dynamics and migration patterns. Here, we tested the hypothesis that the genetic structure of the ABFT in the Mediterranean is correlated with mean surface temperature and salinity. Methodology We used six samples collected from Western and Central Mediterranean integrated with a new sample collected from the recently identified easternmost reproductive area of Levantine Sea. To assess population structure in the Mediterranean we used a multidisciplinary framework combining classical population genetics, spatial and Bayesian clustering methods and a multivariate approach based on factor analysis. Conclusions FST analysis and Bayesian clustering methods detected several subpopulations in the Mediterranean, a result also supported by multivariate analyses. In addition, we identified significant correlations of genetic diversity with mean salinity and surface temperature values revealing that ABFT is genetically structured along two environmental gradients. These results suggest that a preference for some spawning habitat conditions could contribute to shape ABFT genetic structuring in the Mediterranean. However, further studies should be performed to assess to what extent ABFT spawning behaviour in the Mediterranean Sea can be affected by environmental variation. PMID:24260341

  6. Teenage pregnancy, epidemiological behavior in Las Tunas during the period 2012 - 2014

    Directory of Open Access Journals (Sweden)

    Enelis Reyes Reyes

    2015-06-01

    Full Text Available Background: teenage pregnancy is a medical risk to be considered, not only for determining an increase of maternal morbidity and an estimated of 2 to 3 times infant mortality, but also as one of the most important factors in the occurrence of congenital malformations.Objective: to determine the epidemiological behavior of teenage pregnancy in Las Tunas province during the period 2012 - 2014.Methods: a descriptive, observational and retrospective study of the behavior of teenage pregnancy was carried out in the province and time period previously stated. The study was performed in municipalities and People's Councils. The universe consisted of 148 169 women of childbearing age and the sample comprised 3 309 pregnant female teenagers from 12 to 19 years old.Results: the phenomenon of teenage pregnancy continues, but the province and its municipalities show favorable data; 2013 was the one of the most negative results, being Manatí and Amancio municipalities the most significant ones; in all the municipalities there are People's Councils with results that are higher than municipal and provincial averages. The adolescent fertility rate in the province was between 39.0 and 45.2 per 1000, being 2013 and Amancio municipality the ones with the highest incidence.Conclusions: although the teenage pregnancy continues, the province and its municipalities show favorable data, resulting from an integrated and successful health programs, involving Provincial Genetics Network work.

  7. Historia del Boxeo en la provincia de las Tunas hasta 1990

    Directory of Open Access Journals (Sweden)

    Etián Jiménez Espinosa

    2009-09-01

    Full Text Available La presente investigación hace un estudio sobre los antecedentes, génesis, evolución y desarrollo del boxeo en la provincia en Las Tunas, el cual se realiza a partir de una periodización hasta nuestros días. El estudio responde a una de las problemáticas más complejas y necesarias del territorio, que responde a la carencia de información bibliográfica para impartir con la calidad pertinente la asignatura Historia del Deporte, en todos sus ámbitos – internacional, nacional y local- y con un enfoque de análisis totalizador. Se rescata la memoria histórica en su expresión deportiva como parte de la identidad cultural de la región. Las fuentes de la información fueron obtenidas de una acuciosa búsqueda en todos los medios de prensa local, antes y después del Triunfo de la Revolución, de una veintena de especialistas y conocedores del hecho histórico deportivo objeto de estudio. Además, se consultaron numerosas fuentes bibliográficas sobre la historia de este deporte en su manifestación a nivel nacional e internacional.

  8. Into the deep blue sea: Commons theory and international governance of Atlantic Bluefin Tuna

    Directory of Open Access Journals (Sweden)

    Graham Epstein

    2014-08-01

    Full Text Available The need to understand how to sustainably govern oceanic fisheries has become increasingly urgent as their contribution to global food security and livelihoods are threatened by declining stocks. Atlantic Bluefin Tuna (ABFT is a prominent example of the complexities associated with widely distributed oceanic resources, extending in this case to include much of the North-Atlantic and Mediterranean Sea. This distribution has led to limited attention from commons theorists that tend to focus on small-scale social ecological systems. Therefore in order to explore the fit between theories of the commons developed in small-scale systems, we apply the Social-Ecological Systems Meta-Analysis Database (SESMAD to systematically analyze ABFT governance over a 22 year period. The results, which focus on the effects of resource characteristics, broadly correspond to the expectations of commons theory. Interestingly, however, the addition of resource storage in the form of ABFT ranches appears to be contributing to unsustainable harvests. This stands in contrast to previous findings in the commons literature that storage tends to enhance prospects for sustainable governance. Therefore several alternative hypotheses are developed by comparing and contrasting attributes of ABFT and canal irrigation storage. These hypotheses may be used in future research to evaluate the conditions in which storage enhances prospects for sustainable governance.

  9. Estabilidad en el almacenamiento congelado de rebanadas de lomo de atún rojo (Thunnus sp. empacadas en atmósfera modificada con CO2

    Directory of Open Access Journals (Sweden)

    Myrna Luisa Medina Bracamonte

    2014-12-01

    Full Text Available La disponibilidad atún rojo fresco, entero y rebanado, como todo producto pesquero fresco está restringida para los consumidores en zonas distantes a los centros de producción por su estabilidad limitada en el almacenamiento. Por ello la industria pesquera en general, en la época de mayor producción, recurre a la congelación para conservar el excedente de producción, y al empacado para protegerlo del ambiente frío y seco del congelador, evitar su deshidratación y “quemaduras por frío”. El surgimiento del Empacado en Atmósfera Modificada como alternativa para incrementar la vida útil de productos alimenticios despertó la inquietud de evaluar la estabilidad de rebanadas de lomo de atún rojo (Thunnus sp. fresco, congeladas y empacadas con 100 % de CO2 durante su almacenamiento a las temperaturas convencionales para su distribución y venta, -10 y -18 ºC, evaluando la estabilidad química, física, microbiológica y sensorial de las rebanadas de lomo de atún rojo durante ≈ 4 meses de almacenamiento congelado. El 50 % de las rebanadas se congeló a -10 ºC (Tratamiento 1 y el 50 % restante a -18 ºC (Tratamiento 2. Las rebanadas congeladas se empacaron individualmente, el 50 % en atmósfera de 100 % de CO2 conservando la proporción 1:2 (rebanada:gas y el 50 % restante en atmósfera de aire. Se almacenaron a la temperatura correspondiente: Tratamiento 1 a -10 ºC y Tratamiento 2 a -18 ºC durante 111 días. Al final del almacenamiento el tratamiento P2 (100 % CO2 ofreció mejor barrera a la pérdida de humedad, favoreció la estabilidad de la fracción de proteínas solubles en solución salina. Las muestras P2 tuvieron mayor aceptación sensorial, fueron las más oscuras y rojas, con menor recuento microbiológico, coincidiendo con el menor contenido en bases volátiles totales. A -10 ºC la atmósfera de 100 % de CO2 no evitó la “quemadura por frío” y los panelistas percibieron el “olor a pescado”.

  10. Characterization of tuna cooking effluents generated in seafood canning industries; Caracterizacion de los efluentes de coccion de atum generados en la industrias conserveras de productos marinos

    Energy Technology Data Exchange (ETDEWEB)

    Mendez Paz, D.; Torres Ayaso, A. B.; Vieites Baptista de Sousa, J. M.

    2006-07-01

    Tuna cooking effluents from different factories were analyzed, in this work. It has been analyzed effluents form water cooking and steam cooking processes. Steam cooking effluents are more appropriate for protein recovery due to the higher protein concentrations (up to 10 g/l, in some cases) and lower volume. Besides, steam cooking effluents, chemical oxygen demand (COD) and total Kjeldahl nitrogen (TKN) were up to 50 and 5 g/l, respectively. Different correlations between the main parameters the main parameters have been found, for example protein and TKN concentrations of a tuna cooking effluent can be estimated from COD concentrations. (Author) 9 refs.

  11. Assessment of health risk of exposure to mercury through intake under canned tuna in health registration process period January 2010-December 2011

    International Nuclear Information System (INIS)

    Carrillo, M.; Tovar, M.; Alvarez, J.; Arraez, M.; Hordziejewicz, I.; Loreto, I.

    2013-01-01

    The power point presentation is about: Assessing the health risk due to exposure to mercury through ingestion canned tuna under sanitary registration process in the country, using the risk assessment tool recommended by the Codex Alimentarius establishing safety according to the use of local diets. The analytical method appied was Atomic Absorption Spectrophotometry Amalgamation (SS TDA AS). As a recommendation was important to maintain an ongoing program of monitoring of mercury in tuna as being a highly recommended food as being excellent source of protein and fatty acids beneficial to health can also be a source of mercury poisoning in cases of people who have a high consumption thereof in the diet

  12. Comportamiento de la lepra en la provincia de Las Tunas, 2003-2012

    Directory of Open Access Journals (Sweden)

    Martha O León Cabrales

    2014-08-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, para determinar algunas características epidemiológicas de la incidencia de la lepra, que es una enfermedad transmisible, tan antigua como el hombre mismo. El universo estuvo constituido por los 103 casos notificados con lepra en la provincia de Las Tunas, en el período de enero de 2003 a diciembre de 2012. La información se obtuvo por las encuestas epidemiológicas existentes en el Departamento de Estadística de la Dirección Provincial de Salud y en el Centro Provincial de Higiene, Epidemiología y Microbiología. Se creó una base de datos en Epinfo versión 3.3.3, donde se tabularon los datos de las encuestas. El análisis de los resultados se expresó en números absolutos, tasas y porcentajes para su mejor interpretación, obteniéndose como resultado que la tasa de detección de casos tiene un comportamiento irregular, el año de mayor incidencia fue el 2009, con 20 casos. Se notificaron tres casos de lepra infantil; las formas paucibacilares representaron el 51,5%; el modo de detección más frecuente fue el espontáneo. Existe transmisión activa y todo ello puede ser reflejo de la ausencia de un trabajo consolidado en el programa de control de la enfermedad

  13. Certification of Trace Elements and Methylmercury Mass Fractions in Tuna Fish Flesh Homogenate IAEA-436A

    International Nuclear Information System (INIS)

    2017-01-01

    The primary goal of the IAEA Environment Laboratories is to assist Member States in the use of both stable and radioactive isotope analytical techniques to understand, monitor and protect the marine environment. The major impact of large coastal cities on marine ecosystems is a primary concern for the IAEA. The Marine Environment Studies Laboratory, as a part of IAEA Environment Laboratories in Monaco, acts as the analytical support centre for Member State laboratories and is the pillar of the quality assurance programme for the determination of non-nuclear pollutants, trace elements and organic contaminants in the marine environment. The marine pollution assessments required to understand such impacts depend on accurate knowledge of contaminant concentrations in various environmental compartments. Good laboratory practice and quality assurance and control are essential components of the analytical process for the production of data. Quality control procedures are commonly based on analyses of certified reference materials to assess reproducibility and measurement biases and uncertainties. Certified reference materials are key tools for quality assurance. They are used to validate analytical methods and to establish traceability to internationally agreed references. They are cornerstones for laboratory accreditation and the correct implementation of national and international regulations. In the development and validation of new methods, certified reference materials play a vital role in state of the art technologies where measurements are critical. The IAEA supports the development and production of environmental certified reference materials for monitoring laboratories in Member States. The reference material IAEA-436, characterized for trace elements and methylmercury mass fractions in tuna fish flesh homogenate, was produced by the IAEA in Monaco in 2006. This publication describes the production of certified reference material IAEA-436A, which is based on the

  14. Rasgos epidemiológicos de ciegos y débiles visuales por retinosis pigmentaria en la provincia Las Tunas Epidemiologic traits of the blind and visually handicapped due to retinitis pigmantosa in the province of Las Tunas

    Directory of Open Access Journals (Sweden)

    Luisa González Hess

    2003-06-01

    Full Text Available Se estudiaron 325 pacientes con el diagnóstico retinosis pigmentaria en la provincia Las Tunas. De ellos, se encontró que el 24,9 y el 10 % eran ciegos y débiles visuales respectivamente, donde se obtuvo una tasa de ciegos por retinosis pigmentaria de 1,45 x 10 000 habitantes y de débiles visuales de 0,6 x 10 000 habitantes. El tipo de herencia que predominó en ambos grupos fue la autosómica recesiva.325 patients with the diagnosis of retinitis pigmentosa were studied in the province of Las Tunas. Of them, it was found that 24.9 % and 10 % were blind and visually handicapped, respectively. A rate of blind patients caused by retinitis pigmentosa of 1.45 x 10 000 inhabitants and of visually handicapped of 0.6 x 10 000 inhabitants was obtained. The type of inheritance predominating in both groups was the autosomal recessive inheritance.

  15. Determination of cadmium, lead and mercury residual levels in meat ...

    African Journals Online (AJOL)

    Determination of cadmium, lead and mercury residual levels in meat of canned light tuna ( Katsuwonus pelamis and Thunnus albacares ) and fresh little tunny ( Euthynnus alletteratus ) in Libya. ... Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety.

  16. 76 FR 31556 - Endangered and Threatened Wildlife and Plants; Endangered Species Act Listing Determination for...

    Science.gov (United States)

    2011-06-01

    ... Atlantic bluefin tuna (Thunnus thynnus) as threatened or endangered under the Endangered Species Act (ESA... Species Act Listing Determination for Atlantic Bluefin Tuna AGENCY: National Marine Fisheries Service... endangered species within the foreseeable future throughout all or a significant portion of its range.'' The...

  17. Proactive Conservation Program: Species of Concern :: NOAA Fisheries

    Science.gov (United States)

    Invertebrates & Plants Species of Concern Threatened & Endangered Health & Stranding Marine Mammals : Species of Concern Species of Concern List | Grants and Technical Resources/Links bluefin tuna Bluefin Tuna (Thunnus thynnus) Photo: NOAA Species of Concern are those species about which we have some

  18. Valorisation of tuna processing waste biomass for recovery of functional and antioxidant peptides using enzymatic hydrolysis and membrane fractionation process.

    Science.gov (United States)

    Saidi, Sami; Ben Amar, Raja

    2016-10-01

    The enzymatic hydrolysis using Prolyve BS coupled to membrane process (Ultrafiltration (UF) and nanofiltration (NF)) is a means of biotransformation of tuna protein waste to Tuna protein hydrolysate (TPH) with higher added values. This method could be an effective solution for the production of bioactive compounds used in various biotechnological applications and minimizing the pollution problems generated by the seafood processing industries. The amino acid composition, functional and antioxidant properties of produced TPH were evaluated. The results show that the glutamic acid, aspartic acid, glycine, alaline, valine and leucine were the major amino acids detected in the TPH profile. After membrane fractionation process, those major amino acids were concentrated in the NF retentate (NFR). The NFR and NF permeate (NFP) have a higher protein solubility (>95 %) when compared to TPH (80 %). Higher oil and water binding capacity were observed in TPH and higher emulsifying and foam stability was found in UF retentate. The NFP showed the highest DPPH radical scavenging activity (65 %). The NFR contained antioxidant amino acid (30.3 %) showed the highest superoxide radical and reducing power activities. The TPH showed the highest iron chelating activity (75 %) compared to other peptide fractions. The effect of the membrane fractionation on the molecular weight distribution of the peptide and their bioactivities was underlined. We concluded that the TPH is a valuable source of bioactive peptides and their peptide fractions may serve as useful ingredients for application in food industry and formulation of nutritional products.

  19. FISHING GROUND, CACTH COMPOSITION, HOOK RATE AND LENGTH DISTRIBUTION OF BILLFISHES CAUGHT BY TUNA LONG LINE IN INDIAN OCEAN

    Directory of Open Access Journals (Sweden)

    Fathur Rochman

    2013-12-01

    Full Text Available Billfishes area by cacth of tuna long line vessels in Indian Ocean. Billfish are consist of swordfish Xiphias gladius, black marlin Makaira indica, indo facific blue marlin Makaira mazara, stripe marlin Tetrapturus audax, indo facific sailfish Istiophorus platypterus and shortbill spearfish Tetrapturus angustirostris. Besides that, billfishes also have important economic value compared with tuna as an exsported species such as swordfish and marlin. To optimize the catch of billfishes in Indian Ocean, data and information of potential fishing ground, size and catch composition of this species are needed. The billfishes cacth composition collected in 2011 were dominated by 45% swordfish, 20% black marlin, 19% blue marlin,9% short bill spearfish, 6% sailfish and 1%stripe marlin. The billfishes size range which were caught between 60 - 280 cm LJFL (Lower Jaw Fork Length. The sword fish average length was 150 cm, blue marlin 197 cm, black Marlin 189 cm, sailfish 150cm ,short bill spearfish 144 cm and stripe marlin159 cm. From this observation, it was found that most of billfishes caught were in mature.

  20. The age of the Tunas formation in the Sauce Grande basin-Ventana foldbelt (Argentina): Implications for the Permian evolution of the southwestern margin of Gondwana

    Science.gov (United States)

    López-Gamundí, Oscar; Fildani, Andrea; Weislogel, Amy; Rossello, Eduardo

    2013-08-01

    New SHRIMP radiogenic isotope dating on zircons in tuffs (280.8 ± 1.9 Ma) confirms the Early Permian (Artinskian) age of the uppermost section of the Tunas Formation. Tuff-rich levels in the Tunas Formation are exposed in the Ventana foldbelt of central Argentina; they are part of a deltaic to fluvial section corresponding to the late overfilled stage of the Late Paleozoic Sauce Grande foreland basin. Recent SHRIMP dating of zircons from the basal Choiyoi volcanics exposed in western Argentina yielded an age of 281.4 ± 2.5 Ma (Rocha-Campos et al., 2011). The new data for the Tunas tuffs suggest that the volcanism present in the Sauce Grande basin can be considered as the distal equivalent of the earliest episodes of the Choiyoi volcanism of western Argentina. From the palaeoclimatic viewpoint the new Tunas SHRIMP age confirms that by early Artinskian glacial conditions ceased in the Sauce Grande basin and, probably, in adajacent basins in western Gondwana.

  1. Genetic stock structure of frigate tuna (Auxis thazard) along Indian coast based on PCR-RFLP analyses of mtDNA D-Loop region

    Digital Repository Service at National Institute of Oceanography (India)

    GirishKumar; Kunal, S.P.; Menezes, M.R.

    : 547-572. Pillai, N.G.K. and Mallia, J.V. 2007. Bibliography on Tunas. CMFRI Special Publication No. 92: 325 pp Pillai, P.P. and Gopakumar, G. 2003. In: M. Mohan Joseph, A.A. Jayaprakash, (Eds.), Status of exploited marine fishery resources...

  2. An individual-based model of skipjack tuna (Katsuwonus pelamis) movement in the tropical Pacific ocean

    Science.gov (United States)

    Scutt Phillips, Joe; Sen Gupta, Alex; Senina, Inna; van Sebille, Erik; Lange, Michael; Lehodey, Patrick; Hampton, John; Nicol, Simon

    2018-05-01

    The distribution of marine species is often modeled using Eulerian approaches, in which changes to population density or abundance are calculated at fixed locations in space. Conversely, Lagrangian, or individual-based, models simulate the movement of individual particles moving in continuous space, with broader-scale patterns such as distribution being an emergent property of many, potentially adaptive, individuals. These models offer advantages in examining dynamics across spatiotemporal scales and making comparisons with observations from individual-scale data. Here, we introduce and describe such a model, the Individual-based Kinesis, Advection and Movement of Ocean ANimAls model (Ikamoana), which we use to replicate the movement processes of an existing Eulerian model for marine predators (the Spatial Ecosystem and Population Dynamics Model, SEAPODYM). Ikamoana simulates the movement of either individual or groups of animals by physical ocean currents, habitat-dependent stochastic movements (kinesis), and taxis movements representing active searching behaviours. Applying our model to Pacific skipjack tuna (Katsuwonus pelamis), we show that it accurately replicates the evolution of density distribution simulated by SEAPODYM with low time-mean error and a spatial correlation of density that exceeds 0.96 at all times. We demonstrate how the Lagrangian approach permits easy tracking of individuals' trajectories for examining connectivity between different regions, and show how the model can provide independent estimates of transfer rates between commonly used assessment regions. In particular, we find that retention rates in most assessment regions are considerably smaller (up to a factor of 2) than those estimated by this population of skipjack's primary assessment model. Moreover, these rates are sensitive to ocean state (e.g. El Nino vs La Nina) and so assuming fixed transfer rates between regions may lead to spurious stock estimates. A novel feature of the

  3. UNIVERSITAS: A PROJECT WITH A HUMANIST AND INTEGRAL CULTURE APPROACH IN LAS TUNAS UNIVERSITY CENTER / UNIVERSITAS: PROYECTO POR UN PERFIL HUMANISTA Y DE CULTURA INTEGRAL EN EL CENTRO UNIVERSITARIO DE LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Rafaela Macías Reyes

    2010-10-01

    Full Text Available UNIVERSITAS is a project of sociocultural transformation in Las Tunas university center, with the aim to impel the development of the integral culture in the university community. The knowledge and deepening in the needs, interests, hoping, ways of thinking and acting; in an analysis of the reality, ease the elaboration of the project; which enriches the cultural spectrum of the university community. It is supported by a body of theoretical and methodological budget. Its system of actions is based on newness ideas bind to mechanism of supervisory as: the coordinator group of the project, the orientation bureau, and at the same time the functioning of fixed spaces as: the university theater, the room for exhibitions, Univideo, student’ house, ropes, voices, university and creators, a date with craftsman, dance and music.

  4. Selected-ion storage GC-MS analysis of polycyclic aromatic hydrocarbons in palm dates and tuna fish

    Energy Technology Data Exchange (ETDEWEB)

    Al-Omair, A.; Helaleh, M.I.H. [Kuwait Inst. for Scientific Research (KISR), Central Analytical Lab. (CAL), Safat (Kuwait)

    2004-06-01

    A rapid analytical method based on Soxhlet extraction has been developed for determination of polycyclic aromatic hydrocarbons (PAH) in palm dates and tuna fish. The method is based on selected ion-storage gas chromatography-mass spectrometry. In the work discussed we were interested in the analysis of 16 polycyclic aromatic hydrocarbons (PAH) regarded by the EPA as priority pollutants. Soxhlet extraction of real, fortified, and blank samples, with hexane as solvent, was used to extract the analytes of interest. An excellent detection limit and good relative standard deviations (RSD) were obtained and analysis time was short. The linearity and sensitivity of the method for measurement of these analytes at trace levels are discussed. (orig.)

  5. Specific activity and derived intervention levels for cesium-137 in Costa Rican export goods: tuna fish, coffee and powdered milk

    International Nuclear Information System (INIS)

    Loria, L.G.; Mora, Patricia

    1994-01-01

    Cesium-137 is a fission product of 235 U and 239 Pu. After a major nuclear accident, it is released into the atmosphere and in the far field region it will produce radioactively contaminated food and drinking water. This paper will study the specific activity of 137 Cs in three Costa Rican export products: tuna fish, coffee and powdered milk. The average specific activities found are as follows: 0.89 ± 0.41, 1.16 ± 0.76 and 4.53 ± 2.00 Bq kg -1 . They represent low values compared to their derived intervention levels: 1.25 x 10 7 , 1.25 x 10 7 and 2.44 x 10 5 Bq kg -1 , respectively. (Author)

  6. Evaluación del estado mental de los pacientes centenarios en Las Tunas, diciembre 2007- agosto 2008

    Directory of Open Access Journals (Sweden)

    Lisset del Carmen Romero Portelles

    2015-12-01

    Full Text Available El envejecimiento de la población en Cuba es similar al de muchos países desarrollados, y se encuentra entre los que tienen un índice más elevado dentro del grupo de países en desarrollo. Se realizó un trabajo descriptivo observacional  en la provincia de Las Tunas, en el período diciembre 2007- agosto 2008, con el propósito de caracterizar el estado cognitivo-afectivo de los centenarios. El universo estuvo  constituido por 97 ancianos; una vez validada su edad, la muestra quedó conformada con 95 centenarios. Se aplicaron los instrumentos Mini-Mental State Examination (MMSE y Clinical Dementia Rating Scale (CDR y se estudiaron las siguientes variables: estado cognitivo, estado de ánimo, satisfacción con la vida, nivel de tensión y la percepción de eventos vitales. El dato primario provino de las entrevistas realizadas, y para el análisis estadístico se creó una hoja de cálculo en Excel. Se utilizaron técnicas de distribución de frecuencias; para las variables cuantitativas se empleó la proporción en porcentaje. En la muestra de individuos centenarios que vivían en la provincia de Las Tunas, al momento del estudio, predominaron los que no presentaban deterioro cognitivo ni depresión, tuvieron  satisfacción alta con la vida, nivel bajo de tensión y no se afectaban con los eventos vitales. Las positivas características psicológicas y de resiliencia, unidas a un entorno psicosocial favorable, se relacionan con la larga supervivencia de los individuos estudiados.

  7. EL FENÓMENO SOCIO RELIGIOSO EN LAS TUNAS. EL PENTECOSTALISMO Y SU INFLUENCIA PARA UNA CONCEPCIÓN IDENTITARIA

    Directory of Open Access Journals (Sweden)

    Enrique Antonio Lalana Torres

    2015-01-01

    Full Text Available Resumen El pentecostalismo como componente del campo religioso del territorio de Victoria de Las Tunas, los aportes a la identidad cultural son los hilos conductores de este trabajo. Comprende además un análisis del proceso de asentamiento y desarrollo del mismo a partir del análisis de las fuentes históricas y socioculturales. Su génesis primaria responde a condicionantes propias de las transformaciones de Europa Occidental durante el siglo XVI y, consciente o no sus fundadores promulgaron las bases para el correlato religioso del nuevo orden socio económico que se gestaba: el capitalismo. Las implicaciones a la identidad cultural en las regiones donde se asentaron y desarrollaron este tipo de denominaciones generaron comportamientos interesantes que constituyen un importante objeto de estudio para su mejor comprensión. ABSTRACT Pentecostalism as a component of the religious field of the territory of Victoria de Las Tunas, contributions to cultural identity are the threads of this work. It includes an analysis of the process of settlement and development of the same from the analysis of historical and sociocultural sources. Its primary genesis responds to own conditions of transformations of Western Europe during the sixteenth century and, consciously or not its founders enacted the basis for the religious correlate the new socioeconomic order that was brewing: capitalism. The implications for cultural identity in the regions where they settled and developed this kind of names generated interesting behaviors that constitute an important object of study for better understanding.

  8. Assessing Anthropogenic Impacts on Tunas, Sharks and Billfishes with Direct Observations of Human Fishers on the High Seas

    Science.gov (United States)

    Block, B.; Ferretti, F.; White, T.; De Leo, G.; Hazen, E. L.; Bograd, S. J.

    2016-12-01

    Anthropogenic impacts on marine predators have been examined within exclusive economic zones, but few data sets have enabled assessing human fishing impacts on the high seas. By combining large electronic tagging databases archiving mobile predator movements (e.g. Tagging of Pacific Pelagics, TAG A Giant, Animal Telemetry Network) with the global fishing catch and fishing effort data, from satellite tracks of vessels on the high seas (AIS), a better understanding of human use and exploitation at a global scale can be obtained. This capacity to combine the movements of mobile ocean predators (tunas, sharks, billfishes) with analyses of their human predator's behaviors, via examination of the global fishing fleet activities is unprecedented due to the new access researchers are garnering to these big satellite derived AIS databases. Global Fishing Watch is one example of such a data provider, that now makes accessible, the AIS data from the global community of maritime vessels, and has developed along with researchers new algorithms that delineate distinct types of fishing vessel behaviors (longline, purse seiner) and effort. When combined with satellite tagging data of mobile apex predators, oceanographic preferences, records of fishing fleets catches, targeted species and economic drivers of fisheries, new quantitative insights can be gained about the catch reporting of fleets, and the pelagic species targeted at a global scale. Research communities can now also examine how humans behave on the high seas, and potentially improve how fish stocks, such as tunas, billfishes, and sharks are exploited. The capacity to gather information on diverse human fishing fleets and behaviors remotely, should provide a wealth of new tools that can potentially be applied toward the resource management efforts surrounding these global fishing fleets. This type of information is essential for prioritizing regions of conservation concern for megaufauna swimming in our oceans.

  9. El Niño revisited: the influence of El Niño Southern Oscillation on the world's largest tuna fisheries.

    Science.gov (United States)

    Receveur, A.; Simon, N.; Menkes, C.; Tremblay-Boyer, L.; Senina, I.; Lehodey, P.

    2016-12-01

    El Niño Southern Oscillation (ENSO) drives global climate on inter-annual scales and impacts the ecosystem structure in the warm-pool and cold-tongue of the Pacific Ocean. During the El Niño phase of ENSO, the warm-pool can stretch from the western equatorial Pacific to the eastern Pacific allowing species associated with the warm-pool to correspondingly spread eastwards. Conversely, during the la Niña phase the warm-pool is pushed to the far western equatorial Pacific by the cold-tongue allowing species associated with this ecosystem to spread westwards. Consequently, ENSO dynamics are likely to be critical for understanding the ecological processes supporting fisheries in the equatorial Pacific Ocean. Surface inhabiting tuna, such as skipjack, are thought to track the convergence of the warm-pool and cold-tongue with fishing vessels tracking this tuna behavior. Given the reliance of Pacific Island economies on tuna fisheries, knowing when tunas are more likely to be present in high density in their territorial waters is beneficial for harvest control policies such as effort trading between nations. We use the SEAPODYM model to investigate the response of bigeye and skipjack tuna species to the phases of ENSO. SEAPODYM is an age structured model that integrates fisheries dependent and independent data with environmental data. We analyze the outputs of SEAPODYM using wavelets to assess the impact of environmental and biotic variables on the abundance and distribution of adult and juvenile age classes and to study time series cycle and temporal lags to ENSO. The main result for skipjack is the eastward or westward movement of the biomass pattern which is significantly lagged with the warm pool ENSO displacement. That lag ranges from 8 months for juvenile up to 18 months for adults. Such delayed response, can be traced in the model. Higher temperature in the central Pacific during El Niño leads to better recruitment which leads to lagged increase of juvenile

  10. Global pollution monitoring of polychlorinated dibenzo-p-dioxins (PCDDs), furans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) using skipjack tuna as bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, D.; Watanabe, M.; Subraminian, A.N.; Tanabe, S. [Ehime Univ. (Japan); Tanaka, H. [National Research Inst. of Fisheries and Environment of Inland Sea (Japan); Fillmann, G. [Fundacao Univ. Federal do Rio Grande (Brazil); Lam, P.K.S.; Zheng, G.J. [City Univ. of Hong Kong (Hong Kong); Muchtar, M.; Razak, H. [Indonesian Inst. of Sciences (Indonesia); Prudente, M. [De La Salle Univ. (Philippines); Chung, K. [Sungkyunkwan Univ. (Korea)

    2004-09-15

    Worldwide contamination by dioxins and related compounds, such as polychlorinated dibenzop- dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) representing persistent organic pollutants (POPs) have been of great concern due to their persistency in the environment, highly bioaccumulative nature and adverse effects on wildlife and humans. Several studies on air samples and marine organisms from open seas suggested a long range transport of these compounds through atomosphere. Although several investigators have monitored dioxins pollution in localized areas, information on the global distribution of dioxins which can explain their atomospheric transport, behavior and fate are still limited. Skipjack tuna is primarily distributed from offshore waters to open seas in tropical and temperate regions almost all over the world such as the Pacific, Atlantic and Indian Oceans6. This species is an important commercial fish and its ecology and biology has been well studied. Moreover, suitability of skipjack tuna for global monitoring of organic pollutants (DDTs, HCHs PBDEs, organotins, etc.) has been established in our previous report, indicating that migration pattern, growth stage and sex of these animals have no or little effect on the variations of POPs residue levels in their bodies. Hence this species reflected POPs pollution levels in seawater when and where they were collected, caused by the rapid equilibrium partitioning between seawater and body lipid. These facts made skipjack tuna a suitable bioindicator for monitoring the contamination status of dioxins and related compounds. The objectives of this study are to elucidate the global distribution of dioxins (PCDD/Fs and coplanar PCBs) in offshore waters and open seas, and to understand the transport and behaviour of these chemicals using skipjack tuna as bioindicator.

  11. Aniversario XXX de la creación del Centro Provincial de Información de Las Tunas

    Directory of Open Access Journals (Sweden)

    Edenny Reina Castillo Montes de Oca

    2014-08-01

    Full Text Available El 4 de enero de 1984 se inauguró el Centro Provincial de Información de Ciencias Médicas de Las Tunas, lo que permitió organizar la Red Provincial de Bibliotecas Médicas y con ello crear nuevos escenarios para desarrollar la actividad científico - informativa en el territorio; con la apertura de una biblioteca en cada unidad de salud. El Centro inicialmente estuvo ubicado en un pequeño local cercano a la biblioteca del Hospital “Dr. Ernesto Guevara de la Serna”. En el año 1988; con la misión, la visión y los objetivos de trabajo de su objeto social bien definidos, fue trasladado para la Facultad de Ciencias Médicas “Dr. Zoilo Marinello Vidaurreta”, de la provincia de Las Tunas y al crearse la Universidad de Ciencias Médicas en esta provincia, el Centro Provincial de Información pasa a ser una dependencia directa de la misma. En la primera década se sentaron las bases de lo que es hoy el Sistema Provincial de Información de Ciencias de la Salud, constituido por 25 bibliotecas médicas distribuidas en toda la geografía tunera, con la misión de: “garantizar la prestación de servicios de información científico tecnológica a la comunidad de profesionales que conforman el sector de la salud en la provincia, con el fin de elevar la calidad de la asistencia, la investigación, la docencia, la dirección y la cultura médica nueva y propiciar el hallazgo de soluciones que posibiliten enfrentar los problemas de salud”. Durante estos 30 años, los trabajadores de la información en el territorio han laborado con verdadera dedicación para cumplir cada tarea encomendada, asumir los retos del desarrollo continuo de la ciencia, asimilar las nuevas tecnologías y brindar a nuestros usuarios servicios y productos de alto valor informacional. La movilización de recursos lograda a través de los proyectos de la Red Nacional de Salud INFOMED, entre los cuales figuran: Proyecto SIDA, Proyecto para la Promoción de Publicaciones

  12. Caracterización de los pacientes con cirrosis hepática atendidos en Las Tunas

    Directory of Open Access Journals (Sweden)

    Alina Torreblanca Xiques

    2014-11-01

    Full Text Available Se realizó un estudio observacional descriptivo, con el objetivo de caracterizar los pacientes con cirrosis hepática (CH, atendidos en el servicio de gastroenterología del Hospital General Docente “Dr. Ernesto Guevara de la Serna”, Las Tunas, Cuba, en el período comprendido entre febrero de 2012 y febrero de 2014. Se estudiaron 55 pacientes con cirrosis hepática diagnosticada por laparoscopia. Predominaron los pacientes del grupo de edad entre 50 y 59 años, siendo el sexo masculino el más afectado. Las principales manifestaciones clínicas que se apreciaron en estos pacientes fueron la ascitis y los edemas en miembros inferiores, así como las complicaciones más frecuentemente encontradas, la ascitis y la hemorragia digestiva alta. El alcoholismo y la etiología viral por virus C se presentaron con mayor frecuencia, predominando el primero. En el mayor por ciento de los pacientes debutó la enfermedad con al menos una complicación

  13. Evolutionary origin of the Scombridae (tunas and mackerels: members of a paleogene adaptive radiation with 14 other pelagic fish families.

    Directory of Open Access Journals (Sweden)

    Masaki Miya

    Full Text Available Uncertainties surrounding the evolutionary origin of the epipelagic fish family Scombridae (tunas and mackerels are symptomatic of the difficulties in resolving suprafamilial relationships within Percomorpha, a hyperdiverse teleost radiation that contains approximately 17,000 species placed in 13 ill-defined orders and 269 families. Here we find that scombrids share a common ancestry with 14 families based on (i bioinformatic analyses using partial mitochondrial and nuclear gene sequences from all percomorphs deposited in GenBank (10,733 sequences and (ii subsequent mitogenomic analysis based on 57 species from those targeted 15 families and 67 outgroup taxa. Morphological heterogeneity among these 15 families is so extraordinary that they have been placed in six different perciform suborders. However, members of the 15 families are either coastal or oceanic pelagic in their ecology with diverse modes of life, suggesting that they represent a previously undetected adaptive radiation in the pelagic realm. Time-calibrated phylogenies imply that scombrids originated from a deep-ocean ancestor and began to radiate after the end-Cretaceous when large predatory epipelagic fishes were selective victims of the Cretaceous-Paleogene mass extinction. We name this clade of open-ocean fishes containing Scombridae "Pelagia" in reference to the common habitat preference that links the 15 families.

  14. Evaluation of the oxidative status in Oreochromis niloticus fed with tuna by-product meal: possible human health impact.

    Science.gov (United States)

    Saїdi, Saber Abdelkader; Azaza, Mohamed Salah; van Pelt, Jos; El Feki, Abdelfattah

    2014-10-01

    The influence of tuna by-product meal (TBM) diets on the activities of antioxidant enzymes in the muscles, gill and kidney of tilapia was evaluated. The control diet (A0) used fish meal (FM) as the sole source of animal protein and the other three diets (A10-A30), 33%-100% of FM was substituted by TBM at 10% increments. The cytotoxicity of liver and muscles cytosol extracts in human liver cell HepG2 was undertaken. The activities of glutathione S-transferase, superoxide dismutase, catalase and TBARS values in the kidney of fish fed with diet A30 were significantly different (p<0.05) and no alterations were observed in muscle and gill anti-oxidant activities. Our study has confirmed that the cytosol extract does not exhibit cytotoxic effects on the HepG2 cells. These results indicate that the use of TBM as a total replacement for FM into tilapia diets seems to have oxidative stress, thus generating effect on fish metabolism.

  15. Use of a counterfactual approach to evaluate the effect of area closures on fishing location in a tropical tuna fishery.

    Directory of Open Access Journals (Sweden)

    Tim K Davies

    Full Text Available Spatial closures are widely used in marine conservation and fisheries management and it is important to understand their contribution to achieving management objectives. Many previous evaluations of closed area effects have used before-after comparisons, which, without controlling for a full range of factors, cannot ascribe changes in fleet behaviour to area closures per se. In this study we used a counterfactual approach to disentangle the effect of two closed areas on fishing location from other competing effects on the behaviour of the Indian Ocean tuna purse seine fishery. Our results revealed an inconsistent effect of the one of the closed areas between years, after taking into account the influence of environmental conditions on fleet behaviour. This suggests that the policy of closing the area per se was not the main driver for the fleet allocating its effort elsewhere. We also showed a marked difference in effect between the two closed areas resulting from their different locations in the fishery area. These findings highlight the need to account for other key fleet behavioural drivers when predicting or evaluating the contribution of area closures to achieving conservation and fishery management objectives.

  16. In vitro calcium availability in bakery products fortified with tuna bone powder as a natural calcium source.

    Science.gov (United States)

    Nemati, Mahnaz; Kamilah, Hanisah; Huda, Nurul; Ariffin, Fazilah

    2015-08-01

    Avoidance of dairy products due to lactose intolerance can lead to insufficiency of calcium (Ca) in the body. In an approach to address this problem, tuna bone powder (TBP) was formulated as a calcium supplement to fortify bakery products. In a study, TBP recovered by alkaline treatment contained 38.16 g/100 g of calcium and 23.31 g/100 g of phosphorus. The ratio of Ca:P that was close to 2:1 was hence comparable to that in human bones. The availability of calcium in TBP was 53.93%, which was significantly higher than most calcium salts, tricalcium phosphate (TCP) being the exception. In vitro availability of calcium in TBP-fortified cookies or TCP-fortified cookies were comparable at 38.9% and 39.5%, respectively. These values were higher than the readings from TBP-fortified bread (36.7%) or TCP-fortified bread (37.4%). Sensory evaluation of bakery products containing TBP or TCP elicited comparable scores for the two additives from test panels. Hence, TBP could be used in the production of high calcium bakery products that would enjoy consumer acceptance.

  17. Efectividad de la acupuntura en el tratamiento del síndrome del túnel del carpo, Las Tunas

    Directory of Open Access Journals (Sweden)

    Aydelián Jevey González

    2014-08-01

    Full Text Available Se realizó un estudio de intervención con el objetivo de determinar la efectividad de la acupuntura en el tratamiento del Síndrome del Túnel del Carpo, en pacientes que fueron atendidos en el Policlínico Docente Manuel Piti Fajardo del municipio de Las Tunas, en el período comprendido desde enero hasta diciembre de 2008. La muestra la conformaron 50 pacientes mayores de 14 años. Se les aplicó un tratamiento con acupuntura diario en un total de quince sesiones, utilizando los puntos: IG-4, IG-11, ID-3, P-7 y TR-5, conjuntamente con la terapia medicamentosa. Los resultados fueron satisfactorios, la casi totalidad de los pacientes (49 tuvo una evolución clínica positiva, al disminuir los síntomas y signos. Las recaídas fueron mínimas luego de treinta días de aplicado el tratamiento, el consumo de medicamentos disminuyó de forma discreta y los efectos adversos al tratamiento acupuntural fueron mínimos. El tratamiento fue efectivo

  18. Complex coacervation with whey protein isolate and gum arabic for the microencapsulation of omega-3 rich tuna oil.

    Science.gov (United States)

    Eratte, Divya; Wang, Bo; Dowling, Kim; Barrow, Colin J; Adhikari, Benu P

    2014-11-01

    Tuna oil rich in omega-3 fatty acids was microencapsulated in whey protein isolate (WPI)-gum arabic (GA) complex coacervates, and subsequently dried using spray and freeze drying to produce solid microcapsules. The oxidative stability, oil microencapsulation efficiency, surface oil and morphology of these solid microcapsules were determined. The complex coacervation process between WPI and GA was optimised in terms of pH, and WPI-to-GA ratio, using zeta potential, turbidity, and morphology of the microcapsules. The optimum pH and WPI-to-GA ratio for complex coacervation was found to be 3.75 and 3 : 1, respectively. The spray dried solid microcapsules had better stability against oxidation, higher oil microencapsulation efficiency and lower surface oil content compared to the freeze dried microcapsules. The surface of the spray dried microcapsules did not show microscopic pores while the surface of the freeze dried microcapsules was more porous. This study suggests that solid microcapsules of omega-3 rich oils can be produced using WPI-GA complex coacervates followed by spray drying and these microcapsules can be quite stable against oxidation. These microcapsules can have many potential applications in the functional food and nutraceuticals industry.

  19. Evaluación de los componentes de la biodiversidad en la finca agroecológica "Las Palmitas" del municipio Las Tunas Evaluation of the biodiversity components in the agroecological farm "Las Palmitas", Las Tunas municipality

    Directory of Open Access Journals (Sweden)

    Yamilka Salmón

    2012-09-01

    Full Text Available El objetivo del trabajo fue evaluar los componentes de la biodiversidad funcional y su contribución a la productividad y la eficiencia de la producción en la finca "Las Palmitas" (en la provincia Las Tunas, Cuba. Esta tiene un área de 15,44 ha y se dedica a la producción diversificada de cultivos, frutales y animales. Se realizó una caracterización agroecológica y se evaluó la funcionalidad de la biodiversidad, a partir del diseño de un modelo de análisis como guía de la investigación que incluyó los componentes: diversidad de árboles, diversidad de la producción y riqueza de especies. A través del diagnóstico se cuantificó el número de individuos de cada especie agrícola y pecuaria, y se caracterizaron de acuerdo con su funcionalidad dentro del sistema agroproductivo. Las fuentes de información primaria fueron la observación directa, las entrevistas informales y la aplicación de una encuesta semiestructurada, que incluyó las variables de interés para el diagnóstico. Se calcularon los índices de Shannon (2,8 y Margalef (5,70, los que permitieron visualizar la contribución de la diversidad al incremento de la productividad. Los indicadores de diversidad del agroecosistema alcanzaron valores óptimos para los sistemas diversificados, los cuales contribuyeron a la autosufiencia alimentaria, la eficiencia y la productividad. Los resultados indican una relevancia económica y social, que le confiere sostenibilidad y resiliencia al sistema agroecológico evaluado, por lo que constituye un modelo para su diseminación en condiciones locales o similares a las de este estudio.The objective of the work was to evaluate the components of functional biodiversity and their contribution to the productivity and efficiency of production in the farm "Las Palmitas" (Las Tunas province, Cuba. It has an area of 15,44 ha and it is dedicated to diversified crop, fruit and animal production. An agroecological characterization was made and

  20. Benitez Bustamante, Carmen MatildeEstudio de factibilidad para la creación de una empresa dedicada a la producción y comercialización de mermelada y jugo de tuna para el mercado exterior.

    OpenAIRE

    Benitez Bustamante, Carmen Matilde

    2010-01-01

    El presente proyecto consiste en la realización de un estudio de prefactibilidad para verificar la viabilidad de la creación de una empresa dedicada a la producción y comercialización de mermelada y jugo de tuna para el mercado exterior. Se desarrollaron los estudios de mercado, técnico, organizacional y financiero. La empresa llevará el nombre de ECUATUNA Cía. Ltda., y producirá mermelada y jugo de tuna; cuyos nombres comunes serán: cactus jam y juice jam, respectivamente. Y el nombre com...

  1. Hollywood blockbusters and long-tailed distributions

    Science.gov (United States)

    Sinha, S.; Raghavendra, S.

    2004-11-01

    Numerical data for all movies released in theaters in the USA during the period 1997-2003 are examined for the distribution of their popularity in terms of (i) the number of weeks they spent in the Top 60 according to the weekend earnings, and (ii) the box-office gross during the opening week, as well as, the total duration for which they were shown in theaters. These distributions show long tails where the most popular movies are located. Like the study of Redner [S. Redner, Eur. Phys. J. B 4, 131 (1998)] on the distribution of citations to individual papers, our results appear to be consistent with a power-law dependence of the rank distribution of gross revenues for the most popular movies with a exponent close to -1/2.

  2. Big Science and Long-tail Science

    CERN Document Server

    2008-01-01

    Jim Downing and I were privileged to be the guests of Salavtore Mele at CERN yesterday and to see the Atlas detector of the Large Hadron Collider . This is a wow experience - although I knew it was big, I hadnt realised how big.

  3. BIOSORCIÓN DE Cd, Pb y Zn POR BIOMASA PRETRATADA DE ALGAS ROJAS, CÁSCARA DE NARANJA Y TUNA

    Directory of Open Access Journals (Sweden)

    Lissette Vizcaíno Mendoza

    2015-01-01

    Full Text Available Debido a su movilidad en los ecosistemas y a su toxicidad para las formas superiores de vida,los metales pesados Cd, Pb y Zn son priorizados como unos de los contaminantes inorgánicosmás importantes debido al alto riesgo que representan para el medio ambiente. Con el objeto dedisminuir su concentración se diseñó un sistema para evaluar su remoción empleando biomasade algas rojas, cáscaras de naranja (Citrus sp. y tuna guajira (Opuntia sp.. Se estudió la influenciadel pretratamiento y el empaquetamiento mediante ensayos tipo batch, en los que se emplearonsoluciones de sodio y calcio. Se obtuvo como resultado una mayor capacidad de sorción de lasalgas modificadas con NaOH 0.1 N y de la naranja y la tuna con modificación sucesiva con NaOH yCaCl20.2 M, y una afección poco significativa (≤1% del proceso de sorción al empacar la biomasael placas planas de tul poliéster. La eficiencia de remoción se determinó mediante un reactor deflujo continuo de columna fija con un volumen líquido de 400 mL, 75 g de biomasa y tiemposde retención promedio de 1 y 2 h. Los resultados mostraron una eficiencia similar de las tresbiomasas para remover Cd y Pb, con promedios superiores al 95%, mientras que el Zn se removiócon mejor eficiencia (62% al emplear tuna modificada como sorbente. Finalmente, el materialse calcinó a 700 °C con lo que se obtuvo una ceniza estable frente a soluciones ácidas, lo cualgarantiza la captura de los metales removidos.

  4. PERCEPCIÓN DE PRODUCTORES DE TABACO SOBRE INSECTOS PLAGAS Y SU MANEJO EN EL MUNICIPIO JESÚS MENÉNDEZ (LAS TUNAS)

    OpenAIRE

    Rivas, A; Rivas, R; Hinojosa, D; Pérez, J.C; Méndez, A; Martínez, M.A

    2012-01-01

    El tránsito hacia un desarrollo agrario sostenible requiere un acercamiento inicial al estado del conocimiento y a la sensibilización de los actores en relación con los problemas de su entorno local. Con el objetivo de evaluar la percepción fitoproteccionista de productores de tabaco acerca de los insectos plagas en el cultivo y su manejo en el municipio Jesús Menéndez (provincia Las Tunas), se desarrolló el presente estudio. Se utilizó como método la entrevista semi estructurada aplicada a u...

  5. Nivel de conocimientos de médicos generales integrales de Las Tunas sobre nutrición humana

    Directory of Open Access Journals (Sweden)

    Eslhey Sánchez Domínguez

    2014-08-01

    Full Text Available La nutrición humana es un instrumento imprescindible a la hora de realizar intervenciones de salud, para ello se requiere de profesionales con un nivel adecuado de conocimientos sobre esta materia. Se realizó un estudio observacional, descriptivo, transversal, en las cuatro áreas de salud del municipio de Las Tunas, en el período comprendido entre septiembre de 2010 y febrero de 2011. El objetivo de la investigación fue caracterizar los niveles de conocimientos sobre nutrición humana que tienen los especialistas y los residentes en medicina general integral. La muestra quedó conformada por 162 profesionales, a los que se les aplicó un cuestionario estructurado en cinco temas. Se realizó el análisis porcentual de los resultados y, de acuerdo al análisis integral del cuestionario, el 56,2% demostró conocimientos en los niveles medio y alto, el resto evidenció insuficiencias significativas (71 profesionales. Por el tipo de pregunta, el 49,4% (80 profesionales reveló dificultades en diferentes aspectos que constituyen generalidades de nutrición humana. En contraste con ello, el 62,3% demostró niveles de conocimientos medios y altos acerca del empleo de la nutrición en la prevención y tratamiento de enfermedades. Por temas, las deficiencias se centraron en: Aspectos generales y Alimentos, con el 51,2 y 58,7%, respectivamente. Se concluye que en los profesionales incluidos en el estudio existió un discreto predominio de los que poseen niveles de conocimientos medios y altos sobre nutrición humana. Las mayores deficiencias cognoscitivas estuvieron al relacionar los nutrientes con los alimentos y en aspectos generales de nutrición, que es necesario tener presente a la hora de promocionar estilos de vida saludables

  6. Factores de riesgo para la enteropatía parasitaria en niños del municipio Las Tunas

    Directory of Open Access Journals (Sweden)

    Arley Fajardo Ochoa

    2015-11-01

    Full Text Available Se realizó un estudio analítico de tipo caso control, con el objetivo de determinar los factores de riesgo para la enteropatía parasitaria, como principal causa del síndrome de malabsorción intestinal en niños del municipio de Las Tunas durante el año 2011. El mismo fue realizado en el Hospital Pediátrico Provincial “Mártires de Las Tunas”, con una muestra de 87 pacientes que formaron parte del grupo de estudio, cuyos datos se recolectaron de la consulta médica de gastroenterología en el policlínico de consulta externa de dicha unidad asistencial y 174 en el grupo control, tomados de pacientes que acudieron a la consulta de urología, paralela en tiempo y contigua a la de gastroenterología. A cada grupo se le realizó un interrogatorio y examen físico exhaustivo, que permitió recoger todos los posibles factores de riesgo existentes. Para la determinación de los factores de riesgo se utilizaron los paquetes de programas estadísticos Epinfo versión 6, en el que se realizaron análisis univariados y se evaluó el ODDS RATIO, intervalo de confianza y probabilidad. El procesamiento de los datos se realizó con un 95% de confiabilidad. Los factores de riesgo asociados a la enteropatía parasitaria fueron: pertenecer al sexo masculino, los hábitos higiénicos inadecuados, estado nutricional inadecuado, la ingestión de agua sin hervir y la evacuación de excretas no sanitarias. Se recomienda realizar estudios analíticos para determinar la asociación de otros factores de riesgo, con vistas a establecer programas de intervención en estos pacientes.

  7. Comportamiento del síndrome de inmovilización. Hogar de Ancianos, Las Tunas, 2011

    Directory of Open Access Journals (Sweden)

    Mirian Thomas Santiesteban

    2015-11-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal para describir el comportamiento de la inmovilización en el Hogar de Ancianos Carlos Pupo Font, de la provincia de Las Tunas, durante el año 2011. El universo lo constituyeron la totalidad de pacientes institucionalizados y la muestra estuvo conformada por 98 pacientes con algún tipo de inmovilización. Las variables a medir fueron: tipo de inmovilidad, edad, sexo, raza, hábitos tóxicos, estado mental, cambios fisiológicos ocurridos con el envejecimiento, enfermedades frecuentes, complicaciones y factores sociales. La información se obtuvo de la revisión de historias clínicas, fue procesada estadísticamente usando el Microsoft Excel, los resultados se mostraron a través de tablas y gráficos y se compararon con la literatura nacional e internacional. Se obtuvo predominio de pacientes con inmovilización relativa; el grupo de edad más afectado fue de 75 a 84 años, el sexo femenino, la raza blanca y el estado mental correspondiente a los demenciados; el hábito tóxico predominante fue el café; los cambios fisiológicos con el envejecimiento y las enfermedades más frecuentes corresponden a las del aparato músculo esquelético; las complicaciones predominantes fueron las digestivas seguidas por las respiratorias.

  8. Data reconstruction can improve abundance index estimation: An example using Taiwanese longline data for Pacific bluefin tuna.

    Directory of Open Access Journals (Sweden)

    Shui-Kai Chang

    Full Text Available Catch-per-unit-effort (CPUE is often the main piece of information used in fisheries stock assessment; however, the catch and effort data that are traditionally compiled from commercial logbooks can be incomplete or unreliable due to many reasons. Pacific bluefin tuna (PBF is a seasonal target species in the Taiwanese longline fishery. Since 2010, detailed catch information for each PBF has been made available through a catch documentation scheme. However, previously, only market landing data with a low coverage of logbooks were available. Therefore, several nontraditional procedures were performed to reconstruct catch and effort data from many alternative data sources not directly obtained from fishers for 2001-2015: (1 Estimating the catch number from the landing weight for 2001-2003, for which the catch number information was incomplete, based on Monte Carlo simulation; (2 deriving fishing days for 2007-2009 from voyage data recorder data, based on a newly developed algorithm; and (3 deriving fishing days for 2001-2006 from vessel trip information, based on linear relationships between fishing and at-sea days. Subsequently, generalized linear mixed models were developed with the delta-lognormal assumption for standardizing the CPUE calculated from the reconstructed data, and three-stage model evaluation was performed using (1 Akaike and Bayesian information criteria to determine the most favorable variable composition of standardization models, (2 overall R2 via cross-validation to compare fitting performance between area-separated and area-combined standardizations, and (3 system-based testing to explore the consistency of the standardized CPUEs with auxiliary data in the PBF stock assessment model. The last stage of evaluation revealed high consistency among the data, thus demonstrating improvements in data reconstruction for estimating the abundance index, and consequently the stock assessment.

  9. Identification of factors influencing shark catch and mortality in the Marshall Islands tuna longline fishery and management implications.

    Science.gov (United States)

    Bromhead, D; Clarke, S; Hoyle, S; Muller, B; Sharples, P; Harley, S

    2012-04-01

    Recent average annual catches of sharks by tuna longline vessels fishing in the Republic of the Marshall Islands (RMI) are estimated to be between 1583 and 2274 t. Although 22 shark species have been recorded by the observer programme for this fishery, 80% of the annual catch comprises only five species: blue shark Prionace glauca, silky shark Carcharhinus falciformis, bigeye thresher shark Alopias superciliosus, pelagic thresher shark Alopias pelagicus and oceanic whitetip shark Carcharhinus longimanus. Wire leaders (i.e. branch lines or traces) were also used by nearly all observed vessels. Generalized additive model (GAM)-based analyses of catch rates indicated that P. glauca and A. superciliosus are caught in higher numbers when vessels fish in relatively cooler waters, at night, close to the full moon, when the 27° C thermocline is close to the surface and during El Niño conditions. In contrast, C. falciformis, A. pelagicus and C. longimanus are caught in higher numbers when shark lines are used (all three species) or hooks are set at a shallow depth (A. pelagicus and C. longimanus and, also, P. glauca). These findings are generally consistent with current knowledge of these species' habitat preferences, movement and distribution. The results of these analyses were combined with information pertaining to shark condition and fate upon capture to compare the likely effectiveness of a range of potential measures for reducing shark mortality in the longline fishery. Of the options considered, the most effective would be to combine measures that reduce the catch rate (e.g. restrictions on the use of wire leaders, shark baits and shark lines) with measures that increase survival rates after post-capture release (e.g. finning bans). © 2012 Secrtariat of the Pacific Community. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.

  10. Alteraciones genéticas cutáneas diagnosticadas en la infancia, Las Tunas 2010-2012

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    Yordania Velázquez Ávila

    2014-08-01

    Full Text Available Las enfermedades genéticas y los defectos genéticos con afectación cutánea son causa frecuente de estigmatización de las personas que las padecen, afectando su adecuada inserción en la sociedad y con ello su calidad de vida. Se estableció una consulta especializada y multidisplinaria en el hospital pediátrico provincial “Mártires de Las Tunas”, fundamentalmente con especialistas de dermatología, genética y pediatría. Se realizó un estudio descriptivo, transversal y prospectivo, en el período del año 2010 al 2012, para caracterizar a estos pacientes. Las variables estudiadas relacionadas fueron el sexo, la edad biológica al diagnóstico, el municipio de procedencia y la mortalidad. Los resultados se expusieron en tablas de contingencia de N x N. Existió predominio de las genodermatosis, seguido de los defectos congénitos y pocas enfermedades genéticas con afectación cutánea, siendo estas últimas responsables de la mayoría de las muertes. Las genodermatosis más representadas fueron la ictiosis, las mastocitosis y las neurofibromatosis, la edad más frecuente al diagnóstico fue el grupo de los menores de dos años; prevaleció el sexo femenino. La mortalidad fue baja y los municipios más afectados por genodermatosis fueron Las Tunas, Majibacoa y Colombia

  11. Global pollution monitoring of polychlorinated dibenzo-p-dioxins (PCDDs), furans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) using skipjack tuna as bioindicator

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, Daisuke [Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577 (Japan); Watanabe, Mafumi [Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577 (Japan); Subramanian, Annamalai [Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577 (Japan); Tanaka, Hiroyuki [National Research Institute of Fisheries and Environment of Inland Sea (Japan); Fillmann, Gilberto [Fundacao Universidade Federal do Rio Grande (Brazil); Lam, Paul K.S. [Department of Biology and Chemistry, City University of Hong Kong, Hong Kong (China); Zheng, Gene J. [Department of Biology and Chemistry, City University of Hong Kong, Hong Kong (China); Muchtar, Muswerry [Research and Development Center for Oceanology, Indonesian Institute of Sciences (Indonesia); Razak, Hamidah [Research and Development Center for Oceanology, Indonesian Institute of Sciences (Indonesia); Prudente, Maricar [Science Education Department, De La Salle University (Philippines); Chung, Kyu-Hyuck [College of Pharmacy, Sungkyunkwan University (Korea, Republic of); Tanabe, Shinsuke [Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577 (Japan)]. E-mail: shinsuke@agr.ehime-u.ac.jp

    2005-07-15

    In order to elucidate the global distribution of dioxins and related compounds, such as PCDDs, PCDFs and coplanar PCBs, levels of these compounds were determined in the muscle of skipjack tuna (Katsuwonus pelamis) collected from the offshore waters and open seas near Japan, Taiwan, Philippines, Indonesia, Seychelles and Brazil, and the Japan Sea, the East China Sea, the South China Sea, the Indian Ocean and the North Pacific Ocean. PCDDs, PCDFs and coplanar PCBs were detected in almost all the specimens collected from all the locations surveyed, indicating widespread contamination by these compounds in the marine environment. Higher concentrations of dioxins and coplanar PCBs were detected in the samples from temperate Asian regions, plausibly due to larger usage and anthropogenic generation in highly industrialized countries around the East China Sea and the South China Sea, such as Japan, Korea, Taiwan, Hong Kong and coastal China. - Global pollution monitoring of PCDD/Fs and coplanar PCBs in offshore water and open sea were conducted using skipjack tuna as bioindicator.

  12. Global pollution monitoring of polychlorinated dibenzo-p-dioxins (PCDDs), furans (PCDFs) and coplanar polychlorinated biphenyls (coplanar PCBs) using skipjack tuna as bioindicator

    International Nuclear Information System (INIS)

    Ueno, Daisuke; Watanabe, Mafumi; Subramanian, Annamalai; Tanaka, Hiroyuki; Fillmann, Gilberto; Lam, Paul K.S.; Zheng, Gene J.; Muchtar, Muswerry; Razak, Hamidah; Prudente, Maricar; Chung, Kyu-Hyuck; Tanabe, Shinsuke

    2005-01-01

    In order to elucidate the global distribution of dioxins and related compounds, such as PCDDs, PCDFs and coplanar PCBs, levels of these compounds were determined in the muscle of skipjack tuna (Katsuwonus pelamis) collected from the offshore waters and open seas near Japan, Taiwan, Philippines, Indonesia, Seychelles and Brazil, and the Japan Sea, the East China Sea, the South China Sea, the Indian Ocean and the North Pacific Ocean. PCDDs, PCDFs and coplanar PCBs were detected in almost all the specimens collected from all the locations surveyed, indicating widespread contamination by these compounds in the marine environment. Higher concentrations of dioxins and coplanar PCBs were detected in the samples from temperate Asian regions, plausibly due to larger usage and anthropogenic generation in highly industrialized countries around the East China Sea and the South China Sea, such as Japan, Korea, Taiwan, Hong Kong and coastal China. - Global pollution monitoring of PCDD/Fs and coplanar PCBs in offshore water and open sea were conducted using skipjack tuna as bioindicator

  13. Reconstruction of spatiotemporal capture data by means of orthogonal functions: the case of skipjack tuna (Katsuwonus pelamis in the central-east Atlantic

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    Unai Ganzedo

    2013-10-01

    Full Text Available The information provided by the International Commission for the Conservation of Atlantic Tunas (ICCAT on captures of skipjack tuna (Katsuwonus pelamis in the central-east Atlantic has a number of limitations, such as gaps in the statistics for certain fleets and the level of spatiotemporal detail at which catches are reported. As a result, the quality of these data and their effectiveness for providing management advice is limited. In order to reconstruct missing spatiotemporal data of catches, the present study uses Data INterpolating Empirical Orthogonal Functions (DINEOF, a technique for missing data reconstruction, applied here for the first time to fisheries data. DINEOF is based on an Empirical Orthogonal Functions decomposition performed with a Lanczos method. DINEOF was tested with different amounts of missing data, intentionally removing values from 3.4% to 95.2% of data loss, and then compared with the same data set with no missing data. These validation analyses show that DINEOF is a reliable methodological approach of data reconstruction for the purposes of fishery management advice, even when the amount of missing data is very high.

  14. THE FORMATION OF THE LOCAL MUSICAL IDENTITY OF THE CITIZEN FROM LAS TUNAS / LA FORMACIÓN DE LA IDENTIDAD MUSICAL LOCAL DEL TUNERO

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    Elemnia Álvarez Merino

    2012-09-01

    Full Text Available The local music identity, part of the system of identity values, encourages contributing to training in the art instructors of the Bachelor of Education Art Instructor specialty. This paper aims to demonstrate how you can promote the teaching and learning of music from the study of the contents of the musical works of the town, musicians, composers, groups of small and large format and repertoire, Web Site by: Music and musicians from Las Tunas, made for this purpose and offers detailed information on major music events occurred in the town of Las Tunas, since the 40's to today where we find also images and sound with processed information form of hypertext, standard format for you to view information, also offers a proposal made by the authors in order to treat this content in the classroom and beyond, to achieve success in social and cultural transformations that allow to transmit their knowledge maintain its historical and cultural identity, improve the quality of their educational work taking into account the technical scientific advances, in the student to the historical and musical knowledge, experiences, experiential and cultural contributions they receive will contribute to the formation of the identity in the process of forming intentional, organized and systematic.

  15. Colagenosis con afectación dermatológica en edades pediátricas en Las Tunas, 2010 - 2012

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    Katiuska Tamayo Mariño

    2014-08-01

    Full Text Available El estudio de las enfermedades del colágeno en edades pediátricas es relativamente joven y no se cuenta en Las Tunas con archivos que permitan evaluar su comportamiento, por ello se realizó un estudio descriptivo, transversal y prospectivo en el período comprendido entre los años 2010 al 2012, para caracterizar a los pacientes ingresados con estas enfermedades en el hospital pediátrico Mártires de Las Tunas. Inicialmente se determinaron las conectivopatias diagnosticadas con más frecuencia y luego se estudiaron las variables: sexo, edad, color de la piel, procedencia geográfica y antecedentes patológicos familiares de colagenosis, Los resultados fueron expuestos en tablas y expresados en porcientos. Predominaron la artritis idiopática juvenil, seguido de la fiebre reumática y la morfea. El sexo más frecuente fue el femenino, el grupo de edad más afectado fueron los adolescentes mayores de 13 años, el color de la piel que prevaleció fue el blanco y predominaron los pacientes sin antecedentes patológicos familiares de colagenosis

  16. Mineralización de talco asociada a los cuerpos ultramáficos de la Faja del Río de Las Tunas, Cordillera Frontal de Mendoza

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    Gargiulo, María Florencia

    2011-12-01

    Full Text Available Talc mineralization related to the ultramafic bodies of the Río de Las Tunas belt, Frontal Cordillera of Mendoza province. This contribution shows the main characteristics of the talc mineralization related to the Río de Las Tunas ultramafic bodies in the Salamanca Mining District, Frontal Cordillera of Mendoza province. According to the parageneses defined on the studied samples, three generations of talc were established: 1º crystallized in metaperidotites and related to the prograde stage of the regional metamorphism; 2º crystallized inreaction zones (mostly in the talc zone developed at the boundary between metaperidotites and their country-rocks.These reaction zones evidence a metasomatic process due to geochemical gradient between the ultramafic body and their country-rocks. This process was developed during the retrogression of the regional metamorphic cycle. 3º Talc present in shear-zones that cut across the ultramafic bodies. The extreme serpentinization of the ultramaficbodies is concentrated in shear-zones where the serpentine is subsequently replaced by talc ± carbonates related with a hydrothermal stage. Aqueous fluids relatively enriched in CO2 flowed through these shear-zones causing the cease of serpentine formation favoring the talc and/or carbonates. Mined talc deposits are those in shear zones and reaction zones. They are mostly industrial-, asbestine- or talcschist-type. The talc related to the hydrothermal stage can locally reach first and extra qualities.

  17. Comportamiento de la polifarmacia en el hogar de ancianos “Carlos Font Pupo”, Las Tunas, 2011

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    Sahily de la Caridad Rojas Pérez

    2015-11-01

    Full Text Available El envejecimiento conlleva a un mayor consumo de fármacos en los ancianos, elevando la probabilidad de ocurrencia de interacciones medicamentosas y reacciones adversas, afectando la calidad de vida de este tipo de paciente. Se realizó un estudio descriptivo de corte transversal para caracterizar la polifarmacia en el Hogar de Ancianos “Carlos Pupo Font”, en Las Tunas, durante el año 2011. El universo estuvo constituido por la totalidad de pacientes institucionalizados y la muestra por 102 ancianos con criterio de selección de consumo de tres o más medicamentos de forma simultánea en el período de estudio. Se caracterizó la edad y sexo de los ancianos, frecuencia de polifarmacia, los grupos farmacológicos implicados, las principales afecciones clínicas y las posibles interacciones medicamentosas por las prescripciones realizadas. La información se obtuvo de la revisión de historias clínicas y fue procesada mediante la estadística descriptiva. El sexo femenino y el grupo de edad entre 75 y 84 años fueron los predominantes. Un 47% de los ancianos consumió cuatro medicamentos simultáneamente. Los antihipertensivos fueron los medicamentos más usados, seguidos por los AINEs. El 72% de la muestra padece afecciones cardiorrespiratorias y el 68% afecciones músculo esqueléticas. Se identificaron posibles interacciones medicamentosas relacionadas con el proceso de absorción, dadas por uniones de ácidos y bases débiles y por interacciones con alimentos, específicamente con la leche. La polimedicación puede ser racionalizada a través de un uso adecuado de los medicamentos, teniendo en cuenta el intervalo de dosificación, las características químicas de los fármacos, la dosis y las características individuales del paciente.

  18. Efectividad del tratamiento acupuntural en la Parálisis Facial Periférica. Puerto Padre, Las Tunas

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    Dorania Cera Barea

    2015-11-01

    Full Text Available Se realizó un estudio experimental en pacientes mayores de 19 años, con Parálisis Facial Periférica, que fueron atendidos en el Policlínico "Romárico Oro Peña" del municipio de Puerto Padre, provincia de Las Tunas; en el período comprendido entre enero y diciembre del año 2011. La muestra quedó conformada por 40 pacientes que cumplieron con los criterios de inclusión establecidos, a los que se les aplicó el método acupuntural, con el objetivo de evaluar la efectividad del mismo en el tratamiento de esta enfermedad. Los puntos de acupuntura utilizados fueron: Extra 1, 2, 3; Estómago 2, 4, 6, 7; Vaso Concepción 24; Vaso Gobernador 26 y Vesícula Biliar 14. Se aplicó tonificación en el lado sano y dispersión de la energía en el lado de la parálisis. Se recogió la información a través de micro-historias clínicas, donde se incluyeron todas las variables de manera independiente. Los datos se analizaron a través de la estadística descriptiva y el análisis porcentual. Se concluyó que la enfermedad predominó en el sexo femenino y el grupo etáreo de 40 a 49 años; la exposición al frío y/o al calor resultó el factor desencadenante que más incidió; el mayor número de pacientes presentó una evolución clínica favorable; solo se presentaron dos efectos adversos relativos al uso de la acupuntura, demostrando la inocuidad del tratamiento.

  19. Skipjack Tuna Availability for Purse Seine Fisheries Is Driven by Suitable Feeding Habitat Dynamics in the Atlantic and Indian Oceans

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    Jean-Noël Druon

    2017-10-01

    Full Text Available An Ecological Niche model was developed for skipjack tuna (Katsuwonus pelamis, SKJ in the Eastern Central Atlantic Ocean (AO and Western Indian Ocean (IO using an extensive set of presence data collected by the European purse seine fleet (1998–2014. Chlorophyll-a fronts were used as proxy for food availability while mixed layer depth, sea surface temperature, dissolved oxygen, salinity, current intensity, and height anomaly variables were selected to describe SKJ's abiotic environmental preferences. The resultant ecological niche included both mesoscale eddy-type productive features that displayed latitudinal range in the IO to large scale upwelling systems that shrink and swell seasonally in the AO. Overall, 83% of all free swimming school sets (FSC and 75% of drifting fish aggregating device sets (dFAD that contained SKJ occurred within 25 km of favorable feeding habitat. In the AO, 34% of dFAD sets were made more than 100 km away from this habitat, mostly in the surface chlorophyll-a poor environment of the Guinea Current. These distant sets represent 10% of dFAD sets in the IO and 8% of all FSC sets. Our results suggest that the Mozambique Channel in the IO, with its simultaneously favorable feeding and spawning conditions, may seasonally offer a better SKJ nursery habitat than the Guinea Current which shows a substantially poorer feeding capacity. With the exception of this latter area, our results also suggest that fishing accessibility will be higher in months where the size of the favorable feeding habitats are reduced, likely because this reduction drives a geographical contraction in SKJ populations. The observed relationship between the annual size of favorable feeding habitat and both annual catch rates and total catches in the IO is consistent with the near-full exploitation of this stock that has occurred since the 2000s. Moreover, it suggests that annual habitat size could be used as an indicator of growth capacity for this

  20. Estabilidad química, física y microbiológica de lomo de atún (Thunnus sp. rebanado. Empacado, congelado y almacenado a -20 ºC

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    Romaim De Berardinis

    2012-01-01

    Full Text Available La globalización ha introducido en Venezuela el consumo de pescado crudo, principalmente atún rojo (Thunnus sp. para elaborar sushi y sashimi. Esto ha despertado el interés en conservar el atún fresco, congelado, para disponer de él a lo largo del año con los atributos que definen la calidad del atún fresco. El pescado congelado se empaca para protegerlo del ambiente frío y seco del congelador, evitar su deshidratación y quemaduras en la superficie del tejido muscular que modificarían la apariencia (color, textura, el sabor y el valor nutritivo durante el almacenamiento. El empaque, además debe ofrecer barrera al paso del oxígeno. Los filetes individuales de pescados magros pueden conservarse en almacenamiento congelado 6 meses a -18 ºC y hasta 9 meses a -24 ºC. Con este trabajo se propuso determinar el efecto del la operación de empacado antes y después de la operación de congelación de rebanadas de lomo de atún rojo. Tratamiento 1: empacadas al vacío y congeladas a -20 ºC (V1; control: empacadas a presión atmosférica y congeladas a -20 ºC (C1. Tratamiento 2: congeladas a -20 ºC y empacadas al vacío después (V2; control: congeladas a -20 ºC y empacadas a presión atmosférica después (C2. Para el empacado se recurrió a bolsas multilaminadas (PE/PA/PE, impermeables al O2 del aire, al vapor de agua y con resistencia mecánica a bajas temperaturas. El tratamiento V1 mantuvo la estabilidad química, microbiológica y sensorial de las rebanadas de lomo de atún, a 90 días de almacenamiento a -20 ºC, la cuales fueron más rojas (a, menos amarillas (b y más oscuras (L, con la menor producción de malonaldehído (0,64 mg/kg de todos los tratamientos, y la mayor estabilidad de la fracción de proteínas solubles (10,03 %.

  1. Estabilidad química, física y microbiológica de lomo de atún (Thunnus sp. rebanado. Empacado, congelado y almacenado a -20 ºC

    Directory of Open Access Journals (Sweden)

    Romaim De Berardinis

    2012-12-01

    Full Text Available La globalización ha introducido en Venezuela el consumo de pescado crudo, principalmente atún rojo (Thunnus sp. para elaborar sushi y sashimi. Esto ha despertado el interés en conservar el atún fresco, congelado, para disponer de él a lo largo del año con los atributos que definen la calidad del atún fresco. El pescado congelado se empaca para protegerlo del ambiente frío y seco del congelador, evitar su deshidratación y quemaduras en la superficie del tejido muscular que modificarían la apariencia (color, textura, el sabor y el valor nutritivo durante el almacenamiento. El empaque, además debe ofrecer barrera al paso del oxígeno. Los filetes individuales de pescados magros pueden conservarse en almacenamiento congelado 6 meses a -18 ºC y hasta 9 meses a -24 ºC. Con este trabajo se propuso determinar el efecto del la operación de empacado antes y después de la operación de congelación de rebanadas de lomo de atún rojo. Tratamiento 1: empacadas al vacío y congeladas a -20 ºC (V1; control: empacadas a presión atmosférica y congeladas a -20 ºC (C1. Tratamiento 2: congeladas a -20 ºC y empacadas al vacío después (V2; control: congeladas a -20 ºC y empacadas a presión atmosférica después (C2. Para el empacado se recurrió a bolsas multilaminadas (PE/PA/PE, impermeables al O2 del aire, al vapor de agua y con resistencia mecánica a bajas temperaturas. El tratamiento V1 mantuvo la estabilidad química, microbiológica y sensorial de las rebanadas de lomo de atún, a 90 días de almacenamiento a -20 ºC, la cuales fueron más rojas (a, menos amarillas (b y más oscuras (L, con la menor producción de malonaldehído (0,64 mg/kg de todos los tratamientos, y la mayor estabilidad de la fracción de proteínas solubles (10,03 %.

  2. SINTESIS FOSFOLIPID MENGANDUNG ASAM LEMAK w-3 DARI FOSFOLIPID KEDELAI DAN MINYAK KAYA ASAM LEMAK w-3 DARI HASIL SAMPING PENGALENGAN TUNA

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    Teti Estiasih

    2013-03-01

    Full Text Available Synthesis of Phospholipid Containing w-3 Fatty Acids from Soy Phospholipidsand Fish Oil Enriched with w-3 Fatty Acids from Tuna Canning Processing Teti Estiasih, Moch. Nur, Jaya Mahar Maligan, Satrio Maulana ABSTRAK Keunggulan fosfolipid dapat ditingkatkan dengan menggabungkan asam lemak w-3, terutama EPA (eicosapentaenoicacid, C20:5w-3 dan DHA (docosahexaenoic acid, C22:6w-3, pada struktur fosfolipid sehingga diperoleh fosfolipidterstruktur. Strukturisasi fosfolipid kedelai komersial dilakukan dengan cara mengganti asam lemak dari fosfolipidkedelai dengan asam lemak w-3 dari minyak kaya asam lemak w-3 dari hasil samping pengalengan tuna. Sintesisfosfolipid terstruktur dilakukan secara asidolisis enzimatis dengan menggunakan lipase dari R. miehei. Faktor yangdikaji pada proses sintesis ini adalah konsentrasi enzim dan lama sintesis. Tingkat inkorporasi EPA dan DHA padastruktur fosfolipid dipengaruhi oleh konsentrasi enzim. Pada konsentrasi enzim yang rendah, peningkatan lama reaksisetelah tingkat inkoporasi optimum tercapai cenderung menyebabkan penurunan tingkat inkorporasi EPA+DHA. Padakonsentrasi enzim yang tinggi, lama reaksi tampaknya tidak mempengaruhi tingkat inkorporasi. Tingkat inkorporasiDHA lebih tinggi dari EPA sehingga fosfolipid terstruktur yang dihasilkan sangat sesuai digunakan untuk produk panganyang memerlukan kadar DHA tinggi. Ada preferensi inkorporasi EPA+DHA pada fosfatidiletanolamin dibandingkanjenis fosfolipid yang lain.Kata kunci: Fosfolipid terstruktur, asam lemak w-3, EPA, DHA, asidolisis enzimatis ABSTRACT The superiority of soy phospholipids could be obtained by incorporation of w-3 fatty acids into phospholipids structure,especially EPA (eicosapentaenoic acid, C20:5w-3 and DHA docosahexaenoic acid, C22:6w-3. Structurization ofcommercial soy phospholipids was conducted by replacement of natural fatty acids in soy phospholipids by w-3 fattyacids from w-3 fatty acids enriched Þ sh oil from tuna canning processing

  3. Identification of enolases and aldolases as important fish allergens in cod, salmon and tuna: component resolved diagnosis using parvalbumin and the new allergens.

    Science.gov (United States)

    Kuehn, A; Hilger, C; Lehners-Weber, C; Codreanu-Morel, F; Morisset, M; Metz-Favre, C; Pauli, G; de Blay, F; Revets, D; Muller, C P; Vogel, L; Vieths, S; Hentges, F

    2013-07-01

    The majority of fish-allergic patients are sensitized to parvalbumin, known to be the cause of important IgE cross-reactivity among fish species. Little is known about the importance of fish allergens other than parvalbumin. The aim of this study was to characterize hitherto undefined fish allergens in three commonly consumed fish species, cod, salmon and tuna, and to evaluate their importance for in vitro IgE-diagnosis in addition to parvalbumin and fish gelatin. Sixty-two patients were diagnosed by clinical history, skin prick tests and specific IgE to fish extracts. Two new fish allergens from cod, salmon and tuna were identified by microsequencing. These proteins were characterized by immunoblot, ELISA and mediator release assay. Purified parvalbumin, enolase, aldolase and fish gelatin were used for quantification of specific IgE in ELISA. Parvalbumin and two other allergens of 50 and 40 kDa were detected in IgE-immunoblots of cod, salmon and tuna extracts by most patient sera. The 50 and 40 kDa proteins were identified as beta-enolase and fructose-bisphosphate aldolase A respectively. Both purified enzymes showed allergenic activity in the mediator release assay. Indeed, 72.6% of the patients were sensitized to parvalbumin, 20% of these had specific IgE to salmon parvalbumin only. IgE to enolases were found in 62.9% (0.5-95.0 kUA /L), to aldolases in 50.0% (0.4-26.0 kUA /L) and to fish gelatin in 19.3% (0.4-20.0 kUA /L) of the patients. Inter-species cross-reactivity, even though limited, was found for enolases and aldolases by IgE-inhibition ELISA. Fish enolase and aldolase have been identified as important new fish allergens. In fish allergy diagnosis, IgE to enolase and aldolase are especially relevant when IgE to parvalbumin are absent. © 2013 John Wiley & Sons Ltd.

  4. U-Pb age constraints for the La Tuna Granite and Montevideo Formation (Paleoproterozoic, Uruguay): Unravelling the structure of the Río de la Plata Craton

    Science.gov (United States)

    Pamoukaghlián, Karina; Gaucher, Claudio; Frei, Robert; Poiré, Daniel G.; Chemale, Farid; Frei, Dirk; Will, Thomas M.

    2017-11-01

    The Río de la Plata Craton is a continental block that crops out in Uruguay, eastern Argentina, southernmost Brazil and Paraguay. It comprises in Uruguay the Piedra Alta, Tandilia and Nico Pérez terranes, separated by the Colonia and the Sarandí del Yí megashears. The La Tuna Granite, which intrudes the Araminda metasandstones in the Tandilia Terrane, was considered Cambrian in age and the intruded sandstones were assigned to the Neoproterozoic Piedras de Afilar Formation. We show that the granite is Paleoproterozoic in age and that the host metasandstones do not belong to the Piedras de Afilar Formation, but to the Paleoproterozoic Montevideo Formation. U-Pb LA ICP-MS of zircon ages for the La Tuna Granite yielded a concordant crystallization age of 2156 ± 26 Ma. Furthermore a metamorphic event at 2010 ± 9 Ma is revealed by Pb stepwise leaching dating of monazites. U-Pb detrital zircon ages of the host Araminda metasandstone yield an upper intercept discordia age of 2152 ± 29 Ma, which marks the intrusion of the La Tuna pluton, and which is in accordance with the zircon U-Pb LA ICP MS constraints. A concordant U-Pb detrital zircon age of 2465 ± 40 Ma provides a maximum depositional age constraint for the metapsammites. Comparing quartz arenites of the Ediacaran Piedras de Afilar Formation with the Araminda metaquartzites, we conclude that they are very similar regarding petrology but they differ in age and metamorphic overprint. Detrital zircons in quartz arenites of the Piedras de Afilar Formation show youngest ages of 1.0 Ga. On the other hand, detrital zircons recovered from the Araminda metasandstones and the age of the intruding granite allow interpreting a depositional age between 2465 and 2150 Ma. Nd model ages show crustal residence times in average more than 200 myr older for the Tandilia Terrane both in Uruguay and Argentina, with a significant Neoarchean component, which is lacking in the Piedra Alta Terrane. Whereas the Piedra Alta Terrane was

  5. Formulación de una mermelada a partir de pulpa y cáscara de tunas (Opuntia spp. elaborada a nivel planta piloto Formulación de una mermelada a partir de pulpa y cáscara de tunas (Opuntia spp. elaborada a nivel planta piloto

    Directory of Open Access Journals (Sweden)

    José Luis Magaña Ramírez

    2012-02-01

    Full Text Available After a series of experimental tests of jam pulp-based and peel of prickly pear fruit at a laboratory level, generated from previous research projects, and based on results of sensory evaluation, microbiological and physicochemical analysis, it was selected a formulation for a jam from a mixture of pulp and peel of prickly pear fruit “reyna” variety, and “xoconostle” prickly pear fruit pulp for processing at the pilot platform. The jam produced was characterized by physicochemical analysis and microbiological. In the physicochemical analysis, it was included the determination of dietetic fiber (4.35 g dietetic fiber/15 g jam, being one of the most important evaluation, which value comes mainly from the skin of prickly pear fruit. From the physicochemical analysis, it was designed a label for the jam produced. Based on the specifications required by the “Norma Oficial Mexicana”, the product can be considered suitable for consumption and marketing purposes. Después de una serie de pruebas experimentales de mermeladas a base de pulpa y cás­cara de tunas a nivel laboratorio, generados de proyectos de investigación anteriores, y con base en resultados de evaluación sensorial, análisis microbiológico y fisicoquímico, se seleccionó una formulación de mermelada a partir de una mezcla de pulpa y cáscara de tuna variedad reyna, y pulpa de tuna variedad xoconostle para su procesamiento a nivel planta piloto. La mermelada elaborada fue caracterizada mediante análisis fisicoquímico y microbiológico. Dentro de los análisis fisicoquímicos se incluyó la determinación de Fibra Dietética (4.35 g de fibra dietética/15 g de mermelada, siendo éste uno de los análisis más importantes, cuyo valor procede principalmente de la cáscara de las tunas. Basados en las especificaciones exigidas por la Norma Oficial Mexicana, el producto puede considerarse apto para su consumo y para propósitos de comercialización.

  6. Analysis of Social and Emotional Development of Orphaned Youth in terms of Self Concept and Resilience: Study at Child Care Children's Home (PSAA Tunas Bangsa Pati

    Directory of Open Access Journals (Sweden)

    Santoso Santoso

    2017-08-01

    Full Text Available The purpose of this study is to describe the development of the Young Social da Emotional Self-concept and in terms of resilience in the PSAA Tunas Bangsa Pati. The method used is descriptive research with this type of development studies dab data obtained will be analyzed by cross sectional method. The results showed that the concept of self-possessed teenager PSAA is not good, it can be seen from the description of several indicators show that the concept of self-assessment of her teenage less well because many feel insecure and inferiority. Judging from the resilience, the general adolescent PSAA good enough. It can be seen from the emotion management capabilities of any events that are considered less menyengakan life. So overall it can be concluded that the social development of adolescents PSAA poorly and emotional development PSAA pretty good when viewed from the concept of self and resilience.

  7. REPOSITORIO DIGITAL PARA UNA MEJOR GESTIÓN DE LA INFORMACIÓN CIENTÍFICA EN LA UNIVERSIDAD LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Yunior Rodríguez Rodríguez

    2015-07-01

    Full Text Available El presente artículo aborda la importancia de la implementación de un repositorio digital para una mejor gestión de la información científica en la Universidad de Las Tunas, donde podamos socializar y consultar las tesis de grado, maestría y doctorado, resultados de proyectos de investigación, libros, revistas, manuscritos creados en nuestra Universidad e incluso digitalizar libros de única edición y de difícil acceso. Se ofrecen definiciones de varios autores así como los antecedentes de la gestión de información científica en nuestra universidad, además de las ventajas de su creación. También se muestra el diagnóstico y la estrategia para si implementación.

  8. Mitochondrial genome of the bullet tuna Auxis rochei from Indo-West Pacific collection provides novel genetic information about two subspecies.

    Science.gov (United States)

    Li, Mingming; Guo, Liang; Zhang, Heng; Yang, Sen; Chen, Xinghan; Lin, Haoran; Meng, Zining

    2016-09-01

    Previously morphological studies supported the division of the bullet tuna into the two subspecies, Auxis rochei rochei and A. rochei eudorax. As a cosmopolitan species, A. rochei rochei ranges in the Indo-West Pacific and Atlantic oceans, while A. rochei eudorax inhabits in eastern Pacific region. Here, we used the HiSeq next-generation sequencing technique to determine the mitochondrial genome (mitogenome) of A. rochei from Indo-West Pacific collection, and then compared our data with mitogenomic sequences of the Atlantic and eastern Pacific retrieved from NCBI database. Results showed the mitogenome of A. rochei from three geographic collections shared the same genes and gene order, similar to typical teleosts. Also, we examined a low level of nucleotide diversity among these mitogenomic sequences. Interestingly, nucleotide diversity of intra-subspecies (Atlantic versus Indo-West) was higher than that of inter-subspecies (Atlantic versus eastern Pacific, Indo-West versus eastern Pacific).

  9. Turtle bycatch in the pelagic longline fishery off southern Africa ...

    African Journals Online (AJOL)

    Capture by pelagic longline fisheries has been identified as a key threat to turtle populations. This study is the first assessment of turtle bycatch in the South African pelagic longline fishery for tunas Thunnus spp. and swordfish Xiphias gladius. A total of 181 turtles was caught on observed sets between 1998 and 2005, at a ...

  10. THE CRAFT LIKE A CULTURAL PRACTICE THAT CONFIGURES SOCIOCULTURAL PROCESSES: THE BASKETWORK IN THE TUNAS AT THE PRESENT TIME / LA ARTESANÍA COMO UNA PRÁCTICA CULTURAL CONFIGURADORA DE PROCESOS SOCIOCULTURALES: LA CESTERÍA EN LAS TUNAS EN LA ACTUALIDAD

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    Yumairys Diamela Candó Gámez

    2012-09-01

    Full Text Available The presence of the handmade movement in The Tunas is an important cultural fact in which has left condensing the conserved information and renovated in the cultural memoirs of the tunero, as long as it is identity that reflective characteristic that distinguish it and very authentic revealing knowledge and specific creation of a societal group. The years ninety represented a stagnation in the popular craft, it altered and it confused the true sense of the handmade production. The market entered as an element of deregulation of the qualities. He fell in the temptation of the commercialization without control. The art is confused with something easy, the legitimate and necessary commercialization of the productions with the marketing of the candongas, the artisan with the worker self-employed, the promoter with the merolico. The institucionalization of the culture starting from the revolutionary victory with the cultural politics's application in Cuba, together to the economic crisis in the decade of the 90 are sociocultural factors that condition to the craft as that it configures of sociocultural processes that are evidenced in the inherited cultural practices or institutionalized, remunerated (professionals or not remunerated (fans, as approaches that it configures of groups. The types of craft, the techniques, the ethnic composition of the representative groups, the professional formation, the origin (field, city, periphery, and composition of the groups for gender and number (grupal or singular they are indicative that allow to conceptualize the characteristics and types of the craft as cultural practice in The Tunas.

  11. Tuna Genetics Mapping

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — These samples are collected in order to gain a better understanding of the biological and ecological aspects of this group of fish in this area. It will be used to...

  12. Present and future potential habitat distribution of Carcharhinus falciformis and Canthidermis maculata by-catch species in the tropical tuna purse-seine fishery under climate change

    Directory of Open Access Journals (Sweden)

    Nerea eLezama Ochoa

    2016-03-01

    Full Text Available By-catch species from tropical tuna purse seine fishery have been affected by fishery pressures since the last century; however, the habitat distribution and the climate change impacts on these species are poorly known. With the objective of predicting the potential suitable habitat for a shark (Carcharhinus falciformis and a teleost (Canthidermis maculata in the Indian, Atlantic and Eastern Pacific Oceans, a MaxEnt species distribution model (SDM was developed using data collected by observers in tuna purse seiners. The relative percentage of contribution of some environmental variables (depth, sea surface temperature, salinity and primary production and the potential impact of climate change on species habitat by the end of the century under the A2 scenario (scenario with average concentrations of carbon dioxide of 856 ppm by 2100 were also evaluated. Results showed that by-catch species can be correctly modelled using observed occurrence records and few environmental variables with SDM. Results from projected maps showed that the equatorial band and some coastal upwelling regions were the most suitable areas for both by-catch species in the three oceans in concordance with the main fishing grounds. Sea surface temperature was the most important environmental variable which contributed to explain the habitat distribution of the two species in the three oceans in general. Under climate change scenarios, the largest change in present habitat suitability is observed in the Atlantic Ocean (around 16% of the present habitat suitability area of Carcharhinus falciformis and Canthidermis maculata, respectively whereas the change is less in the Pacific (around 10% and 8% and Indian Oceans (around 3% and 2 %. In some regions such as Somalia, the Atlantic equatorial band or Peru’s coastal upwelling areas, these species could lose potential habitat whereas in the south of the equator in the Indian Ocean, the Benguela System and in the Pacific coast of

  13. Large-Scale Examination of Spatio-Temporal Patterns of Drifting Fish Aggregating Devices (dFADs) from Tropical Tuna Fisheries of the Indian and Atlantic Oceans.

    Science.gov (United States)

    Maufroy, Alexandra; Chassot, Emmanuel; Joo, Rocío; Kaplan, David Michael

    2015-01-01

    Since the 1990s, massive use of drifting Fish Aggregating Devices (dFADs) to aggregate tropical tunas has strongly modified global purse-seine fisheries. For the first time, a large data set of GPS positions from buoys deployed by French purse-seiners to monitor dFADs is analysed to provide information on spatio-temporal patterns of dFAD use in the Atlantic and Indian Oceans during 2007-2011. First, we select among four classification methods the model that best separates "at sea" from "on board" buoy positions. A random forest model had the best performance, both in terms of the rate of false "at sea" predictions and the amount of over-segmentation of "at sea" trajectories (i.e., artificial division of trajectories into multiple, shorter pieces due to misclassification). Performance is improved via post-processing removing unrealistically short "at sea" trajectories. Results derived from the selected model enable us to identify the main areas and seasons of dFAD deployment and the spatial extent of their drift. We find that dFADs drift at sea on average for 39.5 days, with time at sea being shorter and distance travelled longer in the Indian than in the Atlantic Ocean. 9.9% of all trajectories end with a beaching event, suggesting that 1,500-2,000 may be lost onshore each year, potentially impacting sensitive habitat areas, such as the coral reefs of the Maldives, the Chagos Archipelago, and the Seychelles.

  14. PERANCANGAN PROGRAM APLIKASI PEMBELAJARAN IPA MATERI SISTEM PERNAPASAN BERBASIS MULTIMEDIA UNTUK SISWA SDLB BAGIAN B TUNA RUNGU MENGGUNAKAN OBJECT ORIENTED APPROACH

    Directory of Open Access Journals (Sweden)

    Diana Effendi

    2016-11-01

    Full Text Available Tunarungu, samahalnya dengan difabel yang lain yang merupakan warganegara Indonesia berhak memperoleh pendidikan. Seperti diketahui Anak Berkebutuhan Khusus (ABK membutuhkan perhatian lebih untuk meningkatkan fokus terhadap proses belajar. Saat ini dalam kegiatan belajar mengajar di objek penelitian yaitu SDLB Bagian (B Cidendo Bandung dilakukan secara konvensional, dimana guru menjelaskan materi pelajaran menggunakan buku sebagai alat bantu dalam pengajaran. Keterbatasan media alat bantu yang tepat untuk mengajaranak tuna rungu menjadi masalah bagi para guru untuk mampu menjelaskan materi pelajaran yang dibebankan kepada siswa. Terutama pada mata pelajaran IPA/Sains yang cukup komplek, contohnya materi sistem pernapasan pada manusia dan hewan sangat membutuhkan bantuan alat yang lebih ke arah visual. Untuk mengatasi hal tersebut, dalam penelitian ini dibuatlah rancangan program aplikasi alat bantu pembelajaran IPA/Sains untuk SDLB bagian B khususnya materi sistem pernapasan manusia dan hewan menggunakan metode penelitian Research Development, metode pendekatan berbasis objek (object-oriented approach, dengan alat bantu perancangan menggunakan Unified Modeling Language (UML yaitu Use Case, Sequence Diagram, Class Diagram.Sedangkan model pengembangan sistem menggunakan prototype. Rancangan tersebut meliputi rancangan proses, rancangan user interface program aplikasi yang disesuaikan dengan aplikasi berbasis multimedia. Berdasarkan rancangan tersebut, nantinya diharapkan dapat diimplementasikan menggunakan software Adobe Flash Cs3 Proffesional yang berbasiskan multimedia, dimana dengan multimedia memungkinkan suatu materi yang tidak dapat disampaikan secara verbal atau kejadian, dapat direkayasa sedemikian rupa sehingga bisa disajikan dengan terperinci dan sangat menarik bagi siswa. Kata kunci: anak berkebutuhan khusus (ABK, tunarungu, IPA/sains, sistem pernapasan manusia dan hewan.

  15. Caracterización del claustro de profesores de la carrera de Estomatología en la provincia de Las Tunas

    Directory of Open Access Journals (Sweden)

    Maydelyn Ureña Espinosa

    2015-06-01

    Full Text Available Conocer las características de un claustro contribuye a mejorar su proceso de superación. La caracterización facilita el poder identificar los rasgos personales, profesionales, laborales y otros, que influyen en el trabajo y permiten organizar con calidad la superación, teniendo en cuenta algunos elementos individuales importantes para el mejoramiento pedagógico profesional. El objetivo de este trabajo fue caracterizar el claustro de profesores de la carrera de Estomatología en la provincia de Las Tunas, en el período 2010-2014. Se realizó un estudio descriptivo, en el mencionado claustro, en todas las sedes universitarias de la provincia, en el referido período de estudio. La población de estudio estuvo conformada por los 106 profesores que imparten clases en cualquier asignatura correspondiente a esta especialidad. Se aplicó un instrumento de recogida de datos a la totalidad de los profesores de forma individual. Como resultado se obtuvo que el grupo de edad que predominó fue el de 35 a 44 años y el sexo femenino; en cuanto a la profesión, prevalecen los estomatólogos y los profesores asistentes; el número de doctores en ciencias es insuficiente, así como, las publicaciones y la participación de los docentes en los eventos

  16. Control de la calidad del diagnóstico coproparasitológico de geohelmintos intestinales en la provincia Las Tunas

    Directory of Open Access Journals (Sweden)

    Rebeca Margarita Laird Pérez

    2015-11-01

    Full Text Available Con el objetivo de evaluar la calidad del diagnóstico coproparasitológico de los geohelmintos intestinales, se realizó un control de la calidad externo activo en la provincia de Las Tunas, de abril a junio de 2012. Se evaluaron las habilidades de 22 profesionales de la Atención Primaria de Salud, para realizar el procedimiento de Kato Katz, la identificación parasitaria e informe de resultados y se les midió el nivel de conocimientos sobre aspectos de interés del diagnóstico de estos gusanos. Se realizaron evaluaciones cualitativas de cada parámetro y se estableció un esquema general de calificación. Las principales deficiencias se presentaron en el informe de resultados, específicamente en la identificación de las especies antropozoonóticas (72,7% evaluados de regular, mientras que la mayoría tuvo resultados favorables en la realización de Kato Katz (54,5% excelente y 27,2% bien y en el nivel de conocimientos (13,6% excelente y 54,5% bien.

  17. Aspectos clínicos endoscópicos, relacionados con la diverticulosis de colon. Las Tunas, enero 2011 – diciembre 2012

    Directory of Open Access Journals (Sweden)

    Liem Fonseca Chong

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo de series de casos, en el Hospital “Dr. Ernesto Guevara de la Serna” de Las Tunas, con el objetivo de caracterizar los aspectos clínicos endoscópicos de la diverticulosis del colon, en el periodo comprendido desde enero 2011 a diciembre 2012. El universo quedó constituido por todos los pacientes a los que se les realizó colonoscopia, y la muestra por todos los pacientes con diagnóstico endoscópico de enfermedad diverticular. Para la obtención de los datos primarios se revisaron los expedientes clínicos de 101 pacientes con esta enfermedad, efectuando un cuestionario, en el cual se recogieron, analizaron y tabularon las variables, utilizando como medida de resumen el porcentaje. Se procesaron los datos y se interpretaron los resultados, concluyendo que en el grupo de pacientes estudiados predominaron las mujeres de más de 65 años, con dolor abdominal como síntoma principal y las hemorroides, como enfermedad que más se asoció a esta padecimiento, siendo el colon sigmoides el más afectado.

  18. Vigilancia inmunoepidemiológica del sarampión, rubéola, parotiditis, poliomielitis y tos ferina en la provincia Las Tunas, 2010-2013

    Directory of Open Access Journals (Sweden)

    Enelis Reyes Reyes

    2014-08-01

    Full Text Available La inmunoepidemiología se ha convertido en imprescindible en el sistema de vigilancia moderno de salud, en la evaluación de los programas de vacunación, en la definición de la inmunidad poblacional y en su papel en la prevención de enfermedades. Este estudio describe el comportamiento en la provincia de Las Tunas de la vigilancia inmunoepidemiológica de cinco enfermedades prevenibles: sarampión, rubéola, parotiditis, poliomielitis y tos ferina. La investigación cubrió el periodo desde el año 2010 hasta el 2013. Los resultados muestran la eficacia de las vacunas empleadas, sin ningún caso positivo registrado y avalan a la vigilancia inmunoepidemiológica establecida desde la atención primaria de salud hasta la red de higiene y epidemiología del municipio, la provincia y la nación. Este sistema es necesario para evaluar con antelación posibles riesgos de enfermedades y la decisión oportuna de medidas de intervención

  19. Susceptibility of dry-cured tuna to oxidative deterioration and biogenic amines generation: I. Effect of NaCl content, antioxidant type and ageing.

    Science.gov (United States)

    Roseiro, L C; Santos, C; Gonçalves, H; Serrano, C; Aleixo, C; Partidário, A; Lourenço, A R; Dias, M Abreu; da Ponte, D J B

    2017-08-01

    This study aimed to assess lipid oxidation and biogenic amine (BA) development in "muxama", a dry-cured tuna muscle product, as affected by salt content, antioxidant type and ageing time. Overall, BA contents decreased with NaCl level (2785.1mgkg -1 , 1148.1mgkg -1 and 307.7mgkg -1 ) and increased with ageing time (366.2mgkg -1 , 1711.8mgkg -1 and 2959.2mgkg -1 in the final product (T0), and after 1 (T1) and 3 (T3) months of ageing, respectively). Regardless of the test conditions, the most concentrated BA was always tyramine. For the ageing periods considered in the present study, malondialdehyde formation was affected by the NaCl level, with the saltiest samples exhibiting lower content. Rosemary and sage extracts represented promising technological options for preserving muxama from oxidation and to minimize the presence of a fishy flavour and odour, but this treatment may cause the colour to lose some of its redness and become less appealing. Copyright © 2017 Elsevier Ltd. All rights reserved.

  20. Caracterización de la trombosis protésica en el servicio de cardiología de Las Tunas. 2006-2011

    Directory of Open Access Journals (Sweden)

    Maikel Santos Medina

    2015-11-01

    Full Text Available Se realizó un estudio descriptivo y transversal en el Servicio de Cardiología del Hospital “Dr. Ernesto Guevara de la Serna” de la provincia de Las Tunas, con el objetivo de caracterizar la trombosis de prótesis valvular en el período entre 2006 y 2011. El universo estuvo conformado por los 34 pacientes ingresados en el servicio por sospecha de trombosis protésica y la muestra por los 29 casos con diagnóstico definitivo de trombosis valvular protésica. Se utilizó la estadística descriptiva a través del análisis porcentual. La edad promedio de los casos fue de 47 años. Predominaron los pacientes del sexo femenino, con prótesis en posición mitral, con anticoagulación inadecuada y con ritmo sinusal en el electrocardiograma al ingreso. El edema agudo del pulmón fue la forma de presentación de disfunción ventricular izquierda que predominó. La mayoría de los pacientes fueron tratados con estreptoquinasa, lográndose resolución de la trombosis en la mayoría de los casos, con un número escaso de complicaciones tras el tratamiento trombolítico.

  1. Utilización del mucílago de tuna (opuntia ficus-indica) en el mejoramiento de la calidad del agua de consumo humano, en la comunidad de Pusir Grande, provincia del Carchi

    OpenAIRE

    Morejón Díaz, Bayro Javier

    2017-01-01

    Mejorar la calidad del agua de consumo humano utilizando mucílago de tuna (Opuntia ficus-indica) en la comunidad de Pusir Grande, Provincia del Carchi. Dentro del proceso para tratamiento de agua para consumo humano, se utilizan coagulantes químicos como el Sulfato de Aluminio Al2 (SO4)3, sin embargo, según estudios realizados, se ha comprobado que este insumo deja aluminio residual, el mismo que podría causar enfermedades como el Alzheimer. En la naturaleza, existen especies vegetativa...

  2. Aspectos clínicos y endoscópicos del adenocarcinoma gástrico en pacientes de Las Tunas, enero de 2013 a enero de 2014

    Directory of Open Access Journals (Sweden)

    Liem Fonseca Chong

    2014-08-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, con el objetivo de caracterizar los pacientes atendidos por adenocarcinoma gástrico en el Hospital General Docente “Dr. Ernesto Guevara de la Serna” de provincia de Las Tunas, durante el periodo comprendido entre el 1 de enero de 2013 y el 1 de enero de 2014. El universo quedó constituido por todos los pacientes a los que se les realizó biopsia de estómago, por lesión sospechosa de adenocarcinoma gástrico, y la muestra por todos los pacientes con diagnóstico histológico de esta enfermedad. Para la obtención de los datos primarios se revisaron los expedientes clínicos de 23 pacientes con biopsia positiva. A partir de un cuestionario se recogieron y procesaron los datos y se interpretaron los resultados. Se encontró un predominio en el sexo masculino (69,5%, en los mayores de 51 años (30,4% y en la población de raza negra (47,8% con antecedentes de infección por helicobacter pylori (69,5%. El 43,4% de los pacientes debutó con una dispepsia prolongada, como síntoma predominante, y la imagen endoscópica más observada fue la úlcera cancerosa (12 casos, en relación con el patrón histológico difuso

  3. Sistema\tde ejercicios para elevar el rendimiento deportivo de las lanzadoras de Softball de la categoría juvenil en la provincia Las Tunas

    Directory of Open Access Journals (Sweden)

    Glenda Isabel Báez Rojas

    2009-03-01

    Full Text Available Para un Equipo de Softball el lanzador ocupa la posición mas difícil y principal a la defensiva, tanto es así que en la mayoría de los casos el éxito o el fracaso de un partido dependen de sus habilidades. La presente investigación, sistema de ejercicios para las lanzadoras de Softball se comenzó aplicar en el curso escolar 2006/2007 en la categoría juvenil de la provincia de Las Tunas, tomando como muestra 4 lanzadoras de apenas un año de experiencia.A través de los instrumentos de diagnóstico, la encuesta y la entrevista aplicados a atletas y entrenadores de la categoría juvenil del sexo femenino se constato que las lanzadoras presentaban grandes insuficiencias en la realización de los elementos técnicos de lanzar, producto a la no existencia de un trabajo técnico enla  primera  etapa  de  formación  a  largo  plazo  del  atleta,  trayendo  como consecuencia resultados discretos. La aplicación del sistema de ejercicios permitió a las lanzadoras juveniles elevar el rendimiento deportivo en correspondencia con sus edades. Para dar cumplimiento a las tareas planteadas y al desarrollo de esta investigación se utilizaron varios métodos, pero el de mayor incidencia en el resultado fue el método empírico, la observación, permitiendo evaluar la calidad de la ejecución en la técnica de lanzar en cada una de las fases propuestas.

  4. Large-Scale Examination of Spatio-Temporal Patterns of Drifting Fish Aggregating Devices (dFADs from Tropical Tuna Fisheries of the Indian and Atlantic Oceans.

    Directory of Open Access Journals (Sweden)

    Alexandra Maufroy

    Full Text Available Since the 1990s, massive use of drifting Fish Aggregating Devices (dFADs to aggregate tropical tunas has strongly modified global purse-seine fisheries. For the first time, a large data set of GPS positions from buoys deployed by French purse-seiners to monitor dFADs is analysed to provide information on spatio-temporal patterns of dFAD use in the Atlantic and Indian Oceans during 2007-2011. First, we select among four classification methods the model that best separates "at sea" from "on board" buoy positions. A random forest model had the best performance, both in terms of the rate of false "at sea" predictions and the amount of over-segmentation of "at sea" trajectories (i.e., artificial division of trajectories into multiple, shorter pieces due to misclassification. Performance is improved via post-processing removing unrealistically short "at sea" trajectories. Results derived from the selected model enable us to identify the main areas and seasons of dFAD deployment and the spatial extent of their drift. We find that dFADs drift at sea on average for 39.5 days, with time at sea being shorter and distance travelled longer in the Indian than in the Atlantic Ocean. 9.9% of all trajectories end with a beaching event, suggesting that 1,500-2,000 may be lost onshore each year, potentially impacting sensitive habitat areas, such as the coral reefs of the Maldives, the Chagos Archipelago, and the Seychelles.

  5. Estimation of the nopal cactus (Opuntia cochenillifera for color removal in drinking water Evaluación de la tuna (Opuntia cochenillifera para la remoción del color en agua potable

    Directory of Open Access Journals (Sweden)

    Joaquín Jiménez Antillón

    2012-12-01

    Full Text Available The efficiency of nopal cactus to remove color in river and artificial waters for human consumption was evaluated. The performance of nopal was compared with that of aluminum sulfate coagulant and a cationic flocculant.The river water was cha- racterized by high color, low turbidity, alkalinity and hardness, and a high percentage of dissolved oxygen. The cactus leaves showed no activity as unique coa- gulant to be evaluated only in river water. In artificial water, as a sole treatment (45 mg/l, an efficiency of 94% in color removal was observed, slightly higher than that of the conventional treatment (20 mg/l Al2 (SO43 and 2 mg/l of cationic flocculant with a removal of 89%. However, water treated with nopal left a residual COD value doubled (21 mg/l compared to con- ventional treatment. In the treatment of artificial water, nopal as a flocculant showed a color removal of 92% and a residual COD of 31.5 mg /l applied at a dose of 22.5 mg/l and 7 mg/l of Al2 (SO43. The nopal was not very effective to remove the color produced by humic substances in waters of low turbidity and alkalinity, but its applicability as a coagulant/flocculant in waters of high turbidity and alkalinity is promising. It is recommended to extract the active ingredients of natural products to reduce the organic load of treated water and prevent the formation of disin- fection byproducts.El estudio evaluó la eficiencia del cactus de la tuna para remover el color en agua de río y agua artificial para el consumo humano. Se comparó su desem- peño con el coagulante sulfato de aluminio y un floculante catiónico. El agua fluvial se caracterizó por presentar alto color, baja turbidez, alcalinidad y dureza y alto porcentaje de oxígeno disuelto. Las hojas de tuna no mostraron actividad como coagulante único al ser evaluadas en agua de río. Se observó una eficiencia de remoción de color del 94% en agua artificial, cuando se aplicó como tratamiento único (45 mg/l, poco

  6. Impacto de la mastoplastia reductiva con técnicas de mínima incisión. Las Tunas, 2008-2010

    Directory of Open Access Journals (Sweden)

    Oliver Alain Dieppa Ramírez

    2015-12-01

    Full Text Available Se realizó un estudio experimental, con el objetivo de evaluar la utilidad de la Mastoplastia reductiva con técnicas de mínima incisión, en el Servicio de Cirugía Plástica del Hospital Provincial Docente “Dr. Ernesto Guevara de la Serna” de la ciudad de Las Tunas; en el periodo comprendido de abril de 2008 a marzo de 2010. El universo estuvo constituido por las 281 pacientes con diagnóstico de hipertrofia mamaria, acompañada o no de ptosis mamaria, y la muestra quedó constituida por las 136 pacientes con diagnóstico de hipertrofia mamaria, grado I, II o III, con criterio quirúrgico estético y/o funcional, las cuales tributaban a la realización de la cirugía con técnicas de mínima incisión durante el período de estudio. Para lograr los objetivos, los datos fueron recogidos de fuentes primarias y secundarias a través del interrogatorio directo, examen físico y de la historia clínica de cada paciente. Todos fueron procesados utilizando la estadística descriptiva mediante el análisis porcentual. Los principales resultados mostraron un predominio del grupo de 23 a 35 años de edad, el tipo de deformidad más operada fue la hipertrofia mamaria moderada, asimismo el tipo de anestesia más usada fue la local. A pesar de ser la dehiscencia de la herida quirúrgica la más frecuente complicación, las operadas se mostraron altamente satisfechas de acuerdo al tamaño, forma, simetría y sensibilidad; siendo la reducción de la cicatriz resultante el parámetro de mayor impacto.

  7. Características de pacientes con cáncer de mama diagnosticado en el año 2013 en el municipio de Las Tunas

    Directory of Open Access Journals (Sweden)

    Enrique Nicolás Milián Mosquera

    2015-06-01

    Full Text Available Fundamento: el cáncer de mama constituye la primera causa de muerte de las mujeres en el mundo. El diagnostico precoz y el tratamiento oportuno de las lesiones mamarias constituyen pilares fundamentales en la evolución y pronóstico de este tipo de cáncer. Objetivo: describir las características clínico-epidemiológicas de las pacientes con cáncer de mama del municipio de Las Tunas, provincia del mismo nombre, Cuba; en el periodo de enero a diciembre de 2013. Métodos: se realizó un estudio observacional-descriptivo y transversal. La población de estudio estuvo constituida por las 59 pacientes que se les diagnosticó cáncer de mama. Se estudiaron los antecedentes patológicos personales, antecedentes patológicos familiares de patología mamaria, menopausia, ingestión de hormonas y otros factores asociados. Se definió el BIRADS (por las siglas en inglés de Breast Imaging reporting and data system mamográfico y se determinó la etapa clínica en que estaban las pacientes cuando se realizó el diagnóstico. Para la recolección de la información fueron utilizados datos estadísticos, historias clínicas individuales, hojas de cargo y resultados de las biopsias y se procesaron por el método estadístico porcentual. Resultados: en la muestra predominó el grupo de edad entre los 50-59 años, los principales factores de riesgo asociados estuvieron relacionados con los antecedentes familiares de haber padecido esta enfermedad, la categoría mamográfica predominante fue la BIRADS IV, y la etapa clínica II. Conclusiones: el mayor por ciento de pacientes se diagnosticó de forma tardía, a pesar de los esfuerzos del sistema nacional de salud para aumentar la pesquisa del cáncer de mama.

  8. Estudio de cinco años en pacientes de Las Tunas con cáncer cutáneo no melanoma

    Directory of Open Access Journals (Sweden)

    Odalys Rufina Peña Pérez

    2015-11-01

    Full Text Available Fundamento: el cáncer cutáneo no melanoma ha mostrado un incremento paulatino a nivel mundial, en Las Tunas, Cuba, existe un comportamiento similar.Objetivo: caracterizar los pacientes diagnosticados histopatológicamente con cáncer cutáneo no melanoma, cuyas biopsias fueron analizadas en el departamento de anatomía patológica del Hospital General Docente "Dr. Ernesto Guevara de la Serna", en el período comprendido entre enero de 2010 a diciembre 2014.Métodos: se realizó un estudio descriptivo de corte transversal en 3970 pacientes, atendidos en el lugar y período de tiempo antes señalado, se utilizó el modelo oficial de biopsia como fuente secundaria de recolección de la información. Los datos fueron procesados utilizando la estadística descriptiva.Resultados: la frecuencia de aparición de este cáncer en el 2010 fue de 15,6 %, se incrementó en el 2011 a 21,7 %, en 2012 y 2013 osciló, con valores de 20,62 % y 22,5 %, respectivamente, y en el 2014 mostró una disminución de los casos positivos a 19,5 %. El tipo histológico predominante fue el carcinoma basocelular, por encima del 50 % en todos los años y estuvo presente en el 65,4 % del total de la muestra estudiada. Se obtuvieron cifras muy cercanas entre ambos sexos: masculino (51,5 % y femenino (48,5 %. El grupo de edad de mayores de 60 años predominó, con el 61,2 % del total de pacientes. La mayoría procedían de las consultas de atención secundaria (76,62 % y la especialidad que más biopsias indicó fue dermatología con un 42,84 %.Conclusiones: la variedad histológica que predominó en los pacientes con cáncer cutáneo no melanoma fue el carcinoma basocelular y su frecuencia fue mayor en pacientes con más de 60 años, la atención primaria no constituyó el principal eslabón de pesquisa y tratamiento de esta afección y los pacientes fueron mayormente atendidos por dermatólogos y cirujanos maxilofaciales.

  9. Aplicación de la psicoterapia sistémica en la atención primaria de salud. Municipio de Las Tunas

    Directory of Open Access Journals (Sweden)

    Emilio Lastre Arrieta

    2015-11-01

    Full Text Available Se realizó un estudio de intervención con un grupo de pacientes neuróticos en tratamiento ambulatorio, del municipio de Las Tunas, donde se empleó como modalidad terapéutica la Psicoterapia Sistémica de Modificación de Predisposiciones, con el objetivo de modificar las actitudes y los síntomas básicos. En la consulta externa de psiquiatría se seleccionaron a los pacientes que integrarían el grupo de psicoterapia, entre los meses de octubre a diciembre del año 2009, con las características de tener un coeficiente intelectual normal, que no presentaran síntomas obsesivos, ni organicidad cerebral. El grupo de trabajo estuvo formado por psiquiatras, un psicólogo clínico, psicometristas y una enfermera psiquiátrica. A todos los pacientes se les realizó una entrevista, con los objetivos de selección y diagnóstico, se les llenó una encuesta teniendo en cuenta los objetivos propuestos y se les indicaron pruebas psicológicas. El grupo se reunió con una frecuencia semanal, empleando un tiempo de hora y media, durante seis meses, de enero a junio de 2010. Se logró la modificación de los síntomas básicos en los pacientes del estudio con esta forma de psicoterapia, valorando también la modificación de actitudes en relación a las problemáticas fundamentales. Se recomienda el tratamiento en este medio, teniendo en cuenta sus características y lo que se quiere lograr, donde los enfermeros y técnicos de salud tengan un papel activo y que además de la modificación sintomática, se mejore la forma de actuar en la vida ante situaciones de conflicto.

  10. Moult patterns in the Long-tailed Hawk Urotriorchis macrourus ...

    African Journals Online (AJOL)

    , based on 51 specimens. The postjuvenile primary moult is descendant, but the annual primary moult is descendant in about half of the cases only and regular serial descendant moult was found in a few, but different asymmetrical patterns ...

  11. Decision Support System For Approval New Student And Majoring Selection Based On Student’s Interest And Talent By Fuzzy Multiple Decision Making, Simple Additive Weighting And Buble Sort Method In SMK Telekomunikasi Tunas Harapan

    Directory of Open Access Journals (Sweden)

    Dewi Nurdiyah

    2016-11-01

    Full Text Available Decision Support System for New Student Acceptance aims to simplify the Decision Maker who is the Committee of New Student Acceptance to select prospective new students based on eight criteria. That is registration number, the average value of National Examinations, medical tests, interview, their achievements, salary of parents per month, number of siblings who are still in school and administration department and give recommendations for the major of accepted students based on their interests and talents. There are four major in SMK Telekomunikasi Tunas Harapan, these are Rekayasa Perangkat Lunak (RPL, Teknik Komputer dan Jaringan (TKJ, Multimedia and Teknik Kendaraan Ringan (TKR. And the talents be measured by math test, electro test, daw test and physics test.

  12. Estimating animal behaviour and residency from movement data

    DEFF Research Database (Denmark)

    Pedersen, Martin Wæver; Patterson, Toby Alexander; Thygesen, Uffe Høgsbro

    2011-01-01

    probability distribution of location and behavior at each point in time. With this, the behavioral state of the animal can be associated to regions in space, thus revealing migration corridors and residence areas. We demonstrate the inferential potential of the method by analyzing satellite-linked archival...... tag data from a southern bluefin tuna Thunnus maccoyii where longitudinal coordinates inferred from daylight are supplemented by latitudinal information in recorded sea surface temperatures....

  13. Tuna fishery research in India

    Digital Repository Service at National Institute of Oceanography (India)

    Menezes, M.R.; Kumar, G.; Kunal, S.

    stream_size 3 stream_content_type text/plain stream_name Enviroscan_Newslett_2_7.pdf.txt stream_source_info Enviroscan_Newslett_2_7.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

  14. Análisis de plasmas inducidos por láser con excitación multipulso para el proceso de ablación de areolas de Tuna

    Directory of Open Access Journals (Sweden)

    Teresa Flores

    2010-01-01

    Full Text Available Introducción: La técnica de análisis de plasmas inducidos por láser (LIBS, posee importantes ventajas como son que la muestra no requiere preparación previa, puede estar en fase sólida, liquida o gaseosa y tener cualquier forma y dimensión, se requiere una cantidad mínima de material y, finalmente, el análisis se realiza en tiempo real. Estas ventajas, hacen posible el seguimiento en tiempo real de un proceso de ablación láser, incluso para muestras de composición compleja. Para el monitoreo de un proceso industrial, esta herramienta sería más adecuada, si se cuenta con una calibración del equipo y un protocolo particular definido. En el trabajo, se ejemplifica esta posibilidad para el caso de la ablación láser de areolas de Tuna (fruto de el Opuntia ficus-indica. Método: Se realiza el análisis LIBS de muestras de tuna, tanto en las areolas como en la corteza. Para la excitación del plasma se emplea un láser de Nd:YAG en régimen de Q:Switch con tren de pulsos. Con el objeto de asegurar el reconocimiento de las líneas en los espectros LIBS, se realizaron análisis en patrones de composición conocida, estableciéndose un protocolo para la interpretación de los espectros. Resultados: Se logró una clara lectura de la línea de H ubicada en 656.2 nm. Se estableció un protocolo para la interpretación de los espectros, que permitió la identificación de 49 picos característicos. Finalmente, se determina la composición para la corteza y la areola y se lleva a cabo una comparación cualitativa entre éstas. Discusión: Se muestra que la excitación láser en forma de tren de pulsos, entendido este régimen como modalidad particular del Q:Switch, permite la determinación eficiente de elementos, con una adecuada relación señal-ruido. Por otra parte, que es posible determinar diferencias composicionales evidentes entre corteza y la areola, lo cual permite monitorear un proceso de ablación de areolas con láser de manera

  15. Skipjack tuna (Katsuwonus pelamis) eyeball oil exerts an anti-inflammatory effect by inhibiting NF-κB and MAPK activation in LPS-induced RAW 264.7 cells and croton oil-treated mice.

    Science.gov (United States)

    Jeong, Da-Hyun; Kim, Koth-Bong-Woo-Ri; Kim, Min-Ji; Kang, Bo-Kyeong; Ahn, Dong-Hyun

    2016-11-01

    The effect of tuna eyeball oil (TEO) on lipopolysaccharide (LPS)-induced inflammation in macrophage cells was investigated. TEO had no cytotoxicity in cell viability as compared to the control in LPS induced RAW 264.7 cells. TEO reduced the levels of NO and pro-inflammatory cytokines by up to 50% in a dose-dependent manner. The expression of NF-κB and MAPKs as well as iNOS and COX-2 proteins was reduced by TEO, which suggests that its anti-inflammatory activity is related to the suppression of the NF-κB and MAPK signaling pathways. The rate of formation of ear edema was reduced compared to that in the control at the highest dose tested. In an acute toxicity test, no mice were killed by TEO doses of up to 5000mg/kg body weight during the two week observation period. These results suggested that TEO may have a significant effect on inflammatory factors and be a potential anti-inflammatory therapeutic. Copyright © 2016 Elsevier B.V. All rights reserved.

  16. Níveis de mercúrio em atum sólido enlatado comercializado na cidade do Rio de Janeiro Total mercury levels in canned tuna fish commercialized at the Rio de Janeiro city, Brazil

    Directory of Open Access Journals (Sweden)

    Allegra YALLOUZ

    2001-01-01

    Full Text Available No presente trabalho, estudou-se o nível de mercúrio em atum sólido enlatado, comercializado na cidade do Rio de Janeiro. Foram analisadas 39 amostras, pertencente a 5 marcas e lotes distintos, utilizando-se a espectrometria de absorção atômica pela técnica de vapor-frio. Os resultados obtidos demonstraram que 53% das amostras apresentaram um teor acima do máximo recomendado, sendo que somente uma entre as cinco marcas estudadas apresentou todas as amostras com níveis dentro dos limites tolerados. Tais resultados demonstram a necessidade de um maior controle da qualidade destes produtos.The present study investigated the mercury levels in canned tuna fish, commercialized in the Rio de Janeiro city, Brazil. Thirty nine samples from five different makers were analyzed by cold vapor atomic absorption spectrometry. The results showed that 53% of the samples presented levels above the WHO (World Health Organization recommended value, and only one from the five suppliers presented all their samples below this level. Such results indicate that it urges a better quality control for this food.

  17. Direct quantification of energy intake in an apex marine predator suggests physiology is a key driver of migrations.

    Science.gov (United States)

    Whitlock, Rebecca E; Hazen, Elliott L; Walli, Andreas; Farwell, Charles; Bograd, Steven J; Foley, David G; Castleton, Michael; Block, Barbara A

    2015-09-01

    Pacific bluefin tuna (Thunnus orientalis) are highly migratory apex marine predators that inhabit a broad thermal niche. The energy needed for migration must be garnered by foraging, but measuring energy intake in the marine environment is challenging. We quantified the energy intake of Pacific bluefin tuna in the California Current using a laboratory-validated model, the first such measurement in a wild marine predator. Mean daily energy intake was highest off the coast of Baja California, Mexico in summer (mean ± SD, 1034 ± 669 kcal), followed by autumn when Pacific bluefin achieve their northernmost range in waters off northern California (944 ± 579 kcal). Movements were not always consistent with maximizing energy intake: the Pacific bluefin move out of energy rich waters both in late summer and winter, coincident with rising and falling water temperatures, respectively. We hypothesize that temperature-related physiological constraints drive migration and that Pacific bluefin tuna optimize energy intake within a range of optimal aerobic performance.

  18. Asociación de la abundancia y la distribución vertical de atunes y peces de pico en el sureste del Mar Caribe

    Directory of Open Access Journals (Sweden)

    Nora Eslava

    2003-03-01

    Full Text Available Se estimó la profundidad de suspensión de los anzuelos del palangre usando el método de Imitación Mecánica de los Sistemas Flexibles, mientras que la distribución vertical de atunes y peces de pico se determinó mediante el índice de abundancia relativa obtenido de capturas de barcos palangreros (11 a 25 m de eslora del puerto de Cumaná, Venezuela y que operan en el Mar Caribe a una profundidad de 65 a 142 m. Se evaluó la CPUE por especie de acuerdo a la profundidad, encontrándose valores altos en la mayoría de los individuos de las especies capturadas en el estrato de 105 a 125 m. El atún aleta amarilla (Thunnus albacares fue el que presentó los más altos rendimientos (3.37 peces/100 anzuelos, mientras que la aguja azul (Makaira nigricans los más bajos (0.04 peces/100 anzuelos. La comparación estadística no permitió rechazar la hipótesis de ausencia del efecto de profundidad (Kruskal-Wallis p > .05, y se puso en evidencia una distribución homogénea, en la columna de agua, del atún aleta amarilla (Thunnus albacares, albacora (Thunnus alalung a, ojo gordo (Thunnus obesus, pez vela (Istiophorus albican s, aguja blanca (Tetrapturus albidus y aguja azul (Makaira nigrican s. Se concluye que la concentración de la pesca en el margen sur del Mar Caribe, posiblemente, es debido a varios factores hidroclimáticos tales como la temperatura del agua y la concentración de oxígeno disuelto que influyen sobre la captura de los atunes y peces de pico delimitando su distribución con res-pecto a la profundidad.The longline hooks suspension depth was estimated using the Mechanic Imitation of Flexible Systems method. The vertical distribution of tunas and billfish was determined by the relative abundance index, obtained from the catch by 11 to 25 m -long longline vessels, -based at Cumaná, Venezuela, South-eastern Caribbean Sea in depths of 65 to 142 m. The CPUE was evaluated per species, according to depth. High values were found for

  19. Massive consumption of gelatinous plankton by Mediterranean apex predators.

    Directory of Open Access Journals (Sweden)

    Luis Cardona

    Full Text Available Stable isotopes of carbon and nitrogen were used to test the hypothesis that stomach content analysis has systematically overlooked the consumption of gelatinous zooplankton by pelagic mesopredators and apex predators. The results strongly supported a major role of gelatinous plankton in the diet of bluefin tuna (Thunnus thynnus, little tunny (Euthynnus alletteratus, spearfish (Tetrapturus belone and swordfish (Xiphias gladius. Loggerhead sea turtles (Caretta caretta in the oceanic stage and ocean sunfish (Mola mola also primarily relied on gelatinous zooplankton. In contrast, stable isotope ratios ruled out any relevant consumption of gelatinous plankton by bluefish (Pomatomus saltatrix, blue shark (Prionace glauca, leerfish (Lichia amia, bonito (Sarda sarda, striped dolphin (Stenella caerueloalba and loggerhead sea turtles (Caretta caretta in the neritic stage, all of which primarily relied on fish and squid. Fin whales (Balaenoptera physalus were confirmed as crustacean consumers. The ratios of stable isotopes in albacore (Thunnus alalunga, amberjack (Seriola dumerili, blue butterfish (Stromaeus fiatola, bullet tuna (Auxis rochei, dolphinfish (Coryphaena hyppurus, horse mackerel (Trachurus trachurus, mackerel (Scomber scombrus and pompano (Trachinotus ovatus were consistent with mixed diets revealed by stomach content analysis, including nekton and crustaceans, but the consumption of gelatinous plankton could not be ruled out completely. In conclusion, the jellyvorous guild in the Mediterranean integrates two specialists (ocean sunfish and loggerhead sea turtles in the oceanic stage and several opportunists (bluefin tuna, little tunny, spearfish, swordfish and, perhaps, blue butterfish, most of them with shrinking populations due to overfishing.

  20. Eficiencia operacional del virador de palangre de una embarcación atunera artesanal prototipo de Isla Margarita, Venezuela Operational efficiency of the longline hauler on a prototype artisanal tuna fishing vessel from Margarita Island, Venezuela

    Directory of Open Access Journals (Sweden)

    Ernesto Trujillo

    2010-01-01

    Full Text Available La eficiencia operacional del mecanismo de virado del palangre de una embarcación atunera artesanal de Isla Margarita, Venezuela, se determinó mediante la velocidad media de calado, velocidad media de virado, tensión de entrada del virador (T0 y su fuerza de tracción (P. Se encontró una relación directa entre la fuerza de gravedad media (q med de la sección de palangre y la tensión de entrada del virador (T0. Considerando una fuerza (Pme d en la entrada del virador (Sj, la tensión en (S3 disminuye debido a la polea de presión que ejerce una fuerza H = 23,7 N, obteniendo una fuerza S4 = 0. La velocidad media de calado del palangre fue de 208 m min-1 (~ 333 anzuelos/hora y la velocidad media de virado de 121 m min-1 (~ 160 anzuelos/hora; mientras que la tensión de entrada del virador (T0 fue de 1.013 N. Por lo tanto, la nueva fuerza de tracción (P fluctuó entre 1.317 y 1.418 N. De acuerdo al torque en las poleas del mecanismo virador, la velocidad media de virado (v med y las relaciones de transmisión (k1= k2, se estimó que para el izado del palangre se requiere una potencia media (Nmed de 5,3 hp (~ 3,95 kW, resultando eficiencia de virado por sección (Tp de 135,4 s.The operational efficiency of the long line hauler on an artisanal tuna fishing vessel from Margarita Island, Venezuela, was determined using the average setting velocity, average hauling velocity, hauler input tension (T0 and traction strength (P. A direct relationship was found between the average gravity (q med on the long-line section and the hauler input tension (T0. Considering a strength (Pme d at the input of the long line hauler (Sj, the roller tension (S3 decreases due to the force of H = 23.7 N exerted by the pressure roller, resulting in a strength of S4 = 0. The long-line average setting velocity was 208 m min-1 (~ 333 hooks/hour and its hauling velocity was 121 m min-1 (~ 160 hooks/hour, whereas hauler input tension (T0 was 1013 N. Therefore, the new

  1. Tuna & täna / Mati Soomre

    Index Scriptorium Estoniae

    Soomre, Mati, 1944-2015

    2006-01-01

    9. märtsil 1842 Milano La Scala teatris esietendunud Giuseppe Verdi ooperi "Nabucco" III vaatuses kõlanud "Orjade koor" sõnad põhinevad Piibli Lauluraamatu 137. laulul, mida on viisistanud paljud heliloojad. 12. märtsil 1946 sündis USA näitleja ja laulja Liza Minelli

  2. Bluefin Tuna Life History (1972-1979)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Catch and size data for animals from which a collection of fish parts were done for life history studies. These samples will be used in comparison studies with more...

  3. Tuna & täna / Mati Soomre

    Index Scriptorium Estoniae

    Soomre, Mati, 1944-2015

    2007-01-01

    1981 esietendus Londonis New Londoni teatris Andrew Lloyd Webberi muusikal "Kassid" Viimane, 8950. etendus oli 11. mail 2002, lavastuse 21. sünnipäeval. Kokku nägi seda lavastust 8 miljonit inimest

  4. Aplikasi Pembelajaran Berbasis Mobile Untuk Tuna Aksara

    Directory of Open Access Journals (Sweden)

    Muhammad Irwan Padli Nasution

    2016-05-01

    Full Text Available Abstract - Learning is a process of transformation that is initially not knowing to knowing. Has developed a lot of learning strategies from simple to more complex models even complicated and required a lot of tools in its application. Literacy is a basic of knowledge for humans.  They can read by improving their quality, which leads to the high intellect of a person. Especially at this time humanity has entered the information age. The phenomenon of globalization is happening now accelerating so quickly, as the impact of  application of Hi-tech society (high-tech society, which causes humans followed on interaction patterns very quickly. Using Information and Communication Technology (ICT could be developed multimedia teaching materials with the concept of learning by playing fun and implemented on a mobile based learning applications. The use of mobile devices that is easy and flexibility is very useful to support the learning process for the illiterate.

  5. Rescue of Long-Tail Data from the Ocean Bottom to the Moon

    Science.gov (United States)

    Hsu, L.; Lehnert, K. A.; Carbotte, S. M.; Ferrini, V.; Delano, J. W.; Gill, J. B.; Tivey, M.

    2013-12-01

    IEDA (Integrated Earth Data Applications, www.iedadata.org), the NSF facility that operates EarthChem, the Marine Geoscience Data System, and the System for Earth Sample Registration, launched a Data Rescue Initiative in 2013 to advance preservation and re-use of valuable legacy datasets that are in danger of being lost. As part of this initiative, IEDA established a competition for Data Rescue Mini-Awards that provide modest funds to investigators to properly compile, document, and transfer legacy data sets to IEDA. Applications from late-career and near-retirement investigators were specifically encouraged. Awardees were given approximately six months to complete their data rescue activities. Three projects were awarded in 2013: (1) Geochemistry of Lunar Glasses: assembly of major element, trace element, volatile element, and isotope ratio data for lunar volcanic glasses and lunar impact glasses, (2) Geochemical and Geochronological data from Fiji, Izu-Bonin-Marianas, and Endeavor segment: assembly of published and unpublished data and metadata from large rock sample collections, and (3) Near-bottom Magnetic Data: curation and archival of 35 years of high-resolution, near-bottom magnetic field data from deeptowed platforms, submersibles, and ROVs. IEDA is working closely with the awardees to guide and support the data rescue effort and to assist with specific challenges related to outdated storage media or technology, diversity of platforms over decades of research, and the lack of established standards for data documentation. In this contribution we describe procedures and tools used for each project, summarize lessons learned and best practices, and present the final output of each data rescue project. Depending on the experiences of this first year and the availability of funds, we plan to continue the competition in future years.

  6. Habitat requirements of the long-tailed ground squirrel (Spermophilus undulatus) in the southern Altai

    Czech Academy of Sciences Publication Activity Database

    Řičánková, V.; Fric, Zdeněk; Chlachula, J.; Šťastná, P.; Faltýnková, A.; Zemek, František

    2006-01-01

    Roč. 270, - (2006), s. 1-8 ISSN 0952-8369 Institutional research plan: CEZ:AV0Z60870520 Keywords : Spermophilus undulatus * Altai mountains * habitat selection * predation risk * grazing Subject RIV: EH - Ecology, Behaviour Impact factor: 1.413, year: 2006

  7. Influence of Long-Tailed Alcohols on the Solubilisation of Cationic DHAB Bilayers

    Directory of Open Access Journals (Sweden)

    Jan B.F.N. Engberts

    2005-01-01

    Full Text Available Abstract: The effects of n-decanol and cetyl alcohol incorporated into cationic di-n-hexadecyldimethylammonium bromide (DHAB bilayers on the packing and the resistance against solubilisation by Triton X-100 have been investigated. Solubilisation experiments revealed that the mismatch between the C10-tail of n-decanol with the DHAB-tails does not affect the structural integrity of the vesicles. On the contrary, upon increasing amounts of cetyl alcohol, of which the tail matches in size with the DHAB-tails, breakdown of the vesicles is promoted, whereas complete solubilisation is strongly hampered. The system is further investigated by DSC and cryo-EM experiments. In addition, the effects of n-decanol and cetyl alcohol embedded into DHAB bilayers on the vesicular rate constants for the decarboxylation of 6-nitrobenzisoxazole-3-carboxylate (6-NBIC suggest that both alcohols affect the structure of the Stern region in an equal manner, leading to a decrease in the catalysis. Therefore, it is concluded that addition of the alcohols leads to changes in properties of the interior of the bilayer, rather than the polar-apolar interface.

  8. Antigenicity of Anisakis simplex s.s. L3 in parasitized fish after heating conditions used in the canning processing.

    Science.gov (United States)

    Tejada, Margarita; Olivares, Fabiola; de las Heras, Cristina; Careche, Mercedes; Solas, María Teresa; García, María Luisa; Fernandez, Agustín; Mendizábal, Angel; Navas, Alfonso; Rodríguez-Mahillo, Ana Isabel; González-Muñoz, Miguel

    2015-03-30

    Some technological and food processing treatments applied to parasitized fish kill the Anisakis larvae and prevent infection and sensitization of consumers. However, residual allergenic activity of parasite allergens has been shown. The aim here was to study the effect of different heat treatments used in the fish canning processing industry on the antigen recognition of Anisakis L3. Bigeye tuna (Thunnus obesus) and yellowfin tuna (Thunnus albacares) were experimentally infected with live L3 Anisakis. After 48 h at 5 ± 1 °C, brine was added to the muscle, which was then canned raw (live larvae) or heated (90 °C, 30 min) (dead larvae) and treated at 113 °C for 60 min or at 115 °C for 90 min. Anisakis antigens and Ani s 4 were detected with anti-crude extract and anti-Ani s 4 antisera respectively. Ani s 4 decreased in all lots, but the muscle retained part of the allergenicity irrespective of the canning method, as observed by immunohistochemistry. Dot blot analysis showed a high loss of Ani s 4 recognition after canning, but residual antigenicity was present. The results indicate that heat treatment for sterilization under the conditions studied produces a decrease in Ani s 4 and suggest a potential exposure risk for Anisakis-sensitized patients. © 2014 Society of Chemical Industry.

  9. Efek NAA dan BAP terhadap Pembentukan Tunas, Daun, dan Tinggi Tunas Stek Mikro Nepenthes ampullaria Jack.

    Directory of Open Access Journals (Sweden)

    Heti Sartika Sari

    2017-01-01

    Full Text Available This study aimed to know the interaction between NAA and BAP as well as to obtain the best combination of both treatments in promoting the growth of Nepenthes ampullariamicrocutting.An experiment arranged in a factorial Randomized Complete Block Design (RCBD wasapplied. Stem segments were used as blocks, where block I was the first segment followed by the next two segments as block II and III respectively. Two factors, i.e. NAA concentrations (0, 5, 10, 15 µM and BAP concentrations (0, 9, 18, 27 µM were employed giving rise to 16 combination of treatments. Each treatment combination was replicated threetimes resulting in 48 experimental units. The parametersmeasured were date of shoot initiation, date of root initiation, shoot number, leaf number, root number, length of longest leafand shoot height. The results showed that interactionbetween NAA and BAP in promoting N. ampullariamicrocutting growth was observed.  Combination between NAA of 0 µM and BAP of 18 µMwas found to be the best in promoting N. ampullariamicrocutting growth.Meanwhile, combination between NAA 0 µM and BAP 27 µM was recommended to promote shoot number of N. ampullaria.

  10. 76 FR 39019 - Atlantic Highly Migratory Species; Atlantic Bluefin Tuna Quotas and Atlantic Tuna Fisheries...

    Science.gov (United States)

    2011-07-05

    ... for the more selective, directed fishing categories, and be a de facto reallocation of quota shares... of post-release mortality received substantial attention at the 2010 ICCAT meeting and NMFS... would not help for giant BFT that may not fit in the hold. NMFS should allow the tail to be cut but...

  11. 培养液组胺的检测及鲣鱼产组胺菌的生物活性评价%Detection Histamine in Nutrient Solution and Evaluation of Biological Characteristics of Histamine-Forming Bacteria in Raw Skipjack Tuna

    Institute of Scientific and Technical Information of China (English)

    周秀锦; 杨建; 周向阳; 沈飚; 吴祖芳

    2012-01-01

    Histamine in nutrient solution is derived with dansyl chloride, determined by HPLC-VWD and quantified by isotope internal standard method with 1,7-Diaminoheptane. Histamine-forming bacteria were selected from the prescreening step using Actis's identification medium from skipjack tuna tissue, and true his-tamine formers were confirmed by HPLC method. Effects of temperature and pH on growth and histamine pro-duction of histamine-forming bacteria were studied. The results showed that the limit of determination of the method for nutrient solution is 0.5μg/mL, the recovery range is 100%-107%; two histamine formers isolated from skipjack tuna tissue were named as J2 and J4, which could produced histamine in trypticase soy broth supplemented with 1.0% L-histidine. The optimal temperature of growth of them were both 30 ℃, and the op- timal growth pH were 7 and 6, respectively. The optimal temperature of histamine production of them were 25 ℃ and 30 ℃, respectively. The optimal pH were both 5. The maximum of histamine reached 12.47 mg/L under the suitable culture condition.%通过直接将培养液中的组胺经丹酰氯衍生化生成稳定的物质,以1,7-二氨基庚烷为内标,建立高效液相色谱-紫外检测器(HPLC-VWD)方法检测培养液中的组胺;并研究了温度和pH对产组胺菌生长和组胺产生的影响。结果表明,培养液中组胺的检测方法定量限为0.5μg/mL,回收率在100%~107%,满足方法培养液中组胺的检测。经分离得到的2株产组胺菌分别记为J2和J4,2株菌在添加L-组氨酸的胰酶大豆肉汤里均能够产生组胺;菌株J2和J4最适生长温度均为30℃,最适pH分别为7和6,菌株J2和J4产组胺的最适温度分别为25℃和30℃,最适pH均为5,在适宜的实验条件下组胺产生量最大值为12.47 mg/L。

  12. DISEÑO DEL SISTEMA DE GESTIÓN DE COMUNICACIÓN ORGANIZACIONAL DE LA FILIAL DE LA ASOCIACIÓN HERMANOS SAÍZ Y SU SEDE SOCIAL: LA CASA DEL JOVEN CREADOR EN LA PROVINCIA DE LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Petia Cubas Zámara

    2015-01-01

    Full Text Available Resumen La tesis “Diseño del Sistema de gestión de comunicación organizacional de la Filial de la Asociación Hermanos Saíz (A.H.S. y su sede la Casa del Joven Creador (C.J.C. en la provincia de Las Tunas”, cuyo objetivo general es diseñar el sistema de gestión de comunicación organizacional de esta asociación y su sede social para contribuir con ello a fortalecer su imagen en los públicos con que interactúan, presenta metodológicamente un enfoque dialéctico materialista y se acoge al paradigma interpretativo. Entre las técnicas empleadas se destacan la observación participante, encuestas, entrevistas en profundidad, estudio de documentos. Se propone un sistema para gestionar y fortalecer este tipo de comunicación en la organización y su sede, el cual se expone en este artículo por ser el resultado más significativo de la presente investigación. ABSTRACT The diploma paper “Design of Organizational Communication from Asociación Hermanos Saiz (A.H.S. and its subsequent office la Casa del Joven Creador (C.J.C. in Las Tunas province” with the general objective of designing the system of searching an organization communication to contribute to strengthen its image in the public for whom they interact. Methodologically, the paper presents a dialectic-materialistic approach, it assumes the interpretative paradigm, among the techniques that were used the following ones can be mentioned; the participant observation, surveys, interviews and document studies. It is proposed a system to manage and strengthen this type of communication in the organization and its headquarters, which is exposed in this article as the most significant result of this research.

  13. Pelagic cephalopods in the western Indian Ocean: New information from diets of top predators

    Science.gov (United States)

    Ménard, Frédéric; Potier, Michel; Jaquemet, Sébastien; Romanov, Evgeny; Sabatié, Richard; Cherel, Yves

    2013-10-01

    Using a combination of diverse large predatory fishes and one seabird, we collected information on the cephalopod fauna of the western Indian Ocean. We analyzed the stomach contents of 35 fishes representing ten families (Xiphiidae, Istiophoridae, Scombridae, Carangidae, Coryphaenidae, Alepisauridae, Dasyatidae, Carcharhinidae, Alopiidae and Sphyrnidae) and of the sooty tern Onychoprion fuscata of the Mozambique Channel from 2000 to 2010. Both fresh and accumulated beaks were used for identifying cephalopod prey. Cephalopods were important prey for twelve predators; swordfish Xiphias gladius had the highest cephalopod proportion; sooty tern (O. fuscata) and bigeye tuna (Thunnus obesus) had high proportions too. We recovered 23 cephalopod families and identified 38 species. Ten species from four Teuthida families (Ommastrephidae, Onychoteuthidae, Histioteuthidae and Ancistrocheiridae) and two Octopoda families (Argonautidae and Bolitaenidae) occurred very frequently in the stomach contents, while Sepiida were rare. Ommastrephidae were the most cephalopod food sources: the purpleback flying squid Sthenoteuthis oualaniensis was the most prevalent prey by far, Ornithoteuthis volatilis was important for eleven predators and few but large specimens of the neon flying squid Ommastrephes bartramii were recovered in the stomachs of swordfish in the Indian South Subtropical Gyre province only. Predators' groups were identified based on cephalopod prey composition, on depth in which they forage, and on prey size. Surface predators' diets were characterized by lower cephalopod diversity but greater average numbers of cephalopod prey, whereas the deep-dwelling predators (swordfish and bigeye tuna) preyed on larger specimens than surface predators (O. fuscata or yellowfin tunas Thunnus albacares). Our findings emphasized the usefulness of a community of marine predators to gain valuable information on the biology and the distribution of the cephalopod forage fauna that are

  14. Physical-chemical quality of fish used for making sushi and sashimi tuna and salmon marketed in Rio de Janeiro, BrazilQualidade físico-química do pescado utilizado na elaboração de sushis e sashimis de atum e salmão comercializados no município do Rio de Janeiro, Brasil

    Directory of Open Access Journals (Sweden)

    Bruna Leal Rodrigues

    2012-10-01

    Full Text Available This study aimed to determine the physical-chemical quality of fish used in a random sampling of 54 samples of sushi and sashimi tuna and salmon obtained in restaurants with the support of Sanitary Surveillance of the city of Rio de Janeiro from July to August 2011. The temperature were measured at the time of sampling. We carried out physical and chemical tests to determine pH, ammonia, H2S, total volatile bases (TVB, trimethylamine (TMA and histamine. All samples were exposed to inadequate temperature. Only one of the samples was found above the recommended pH value by law. Five were positive for ammonia and two positive results for H2S. The average results of TVB ranged between 9.43 and 12.37 mg N-BVT/100g and the amount of TMA ranged between 0.57 and 0.96 mg N-TMA/100g, being within the recommended standard. The histamine was found in five samples, ranging between 1 and 10 mg/100g. Considering the samples studied, seven (12,96% showed some abnormalities on the evaluated parameters. In conclusion, the consumption of sushi and sashimi can cause risk to consumer health. Therefore, we suggest that a continuous attention from the authorities should be held on this type of food due to their high perishability and risk to public health. O presente estudo objetivou determinar a qualidade físico-química do pescado utilizado em uma amostragem aleatória de 54 sushis e sashimis de atum e salmão obtidos em restaurantes com apoio da Vigilância Sanitária da cidade do Rio de Janeiro no período de julho a agosto de 2011. A temperatura foi mensurada no momento da coleta. Realizou-se provas físico-químicas de determinação de pH, amônia, H2S, bases voláteis totais (BVT, trimetilamina (TMA e histamina. Todas as amostras apresentavam-se expostas em temperatura inadequada. Apenas uma das amostras apresentou pH acima do limite preconizado pela legislação. Cinco apresentaram resultados positivos para amônia e duas resultados positivos para H2S. Os

  15. Algunas adiciones a la fauna monogenética (Plathyhelminthes de Venezuela | Some additions to venezuelan monogenetic fauna (Plathyhelminthes

    Directory of Open Access Journals (Sweden)

    Arnaldo Figueredo Rodríguez

    2017-11-01

    Full Text Available As part of periodical studies about parasitic fauna of marine fishes carried out in Laboratory of Parasitology of Universidad de Oriente, campus Nueva Esparta, several commercially important ichthyic species were evaluated. Fishes were collected in three landing ports of Nueva Esparta state and immediately processed. Gills were carefully extracted and reviewed under stereoscopic microscope. Permanent slides were prepared with parasites found, and then to obtain descriptive images. In all cases, the parasitic habitat was gills of hosts. New records for Venezuela comprises five monogeneans: Capsala manteri collected on little tunny, Euthynnus alleteratus; Capsala pricei found over lesser devil ray, Mobula hypostoma; Tristoma integrum observed on swordfish, Xiphias gladius; Decacotyle floridana registred over spotted eagle ray, Aetobatus narinari and Hexostoma lintoni discovered on yellowfin tuna, Thunnus albacares. For the first time for the country, representatives of sub-families Capsalinae and Decacotylinae were referred to. Some details of parasites anatomy are described, discussing about taxonomic and biogeographic aspects.

  16. Touchstones from early medieval burials in Tuna in Alsike, Sweden

    Czech Academy of Sciences Publication Activity Database

    Ježek, Martin

    2014-01-01

    Roč. 42, February (2014), s. 422-429 ISSN 0305-4403 Grant - others:Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M300021203 Institutional support: RVO:67985912 Keywords : Early Middle Ages * Viking Age * elite * boat burial * touchstone * precious metal * zinc * nickel Subject RIV: AC - Archeology, Anthropology, Ethnology Impact factor: 2.196, year: 2014

  17. Management actions and initiatives for bluefin tuna over the past ...

    African Journals Online (AJOL)

    spamer

    structure, and (3) autocorrelation in recruitment processes is considered within the likelihood framework of the model. .... The inclusion ... Cpue values for Age 4 for two recent years of the as- .... reflects the amount of change (over time period.

  18. The migration game in habitat network: the case of tuna

    DEFF Research Database (Denmark)

    Mariani, Patrizio; Krivan, Vlastimil; MacKenzie, Brian

    2016-01-01

    migration in direction of increasing fitness should lead to the ideal free distribution (IFD) which is the evolutionary stable strategy of the habitat selection game. We introduce a migration game which focuses on migrating dynamics leading to the IFD for age-structured populations and in time varying...

  19. Temperature discrimination by captive free-swimming tuna, Euthynnus affinis

    International Nuclear Information System (INIS)

    Steffel, S.; Dizon, A.E.; Magnuson, J.J.; Neill, W.H.

    1976-01-01

    Captive kawakawa, Euthynnus affinis, were instrumentally conditioned to respond to an increase in temperature to determine discrimination abilities. Two fish yielded a discrimination threshold of 0.10 to 0.15 0 C. Thermal sensitivity of this high-seas pelagic fish is thus no more acute than that of inshore fishes and appears inadequate for direct sensing of weak horizontal temperature gradients at sea

  20. The migration game in habitat network: the case of tuna

    Czech Academy of Sciences Publication Activity Database

    Mariani, P.; Křivan, Vlastimil; MacKenzie, B. R.; Mullon, C.

    2016-01-01

    Roč. 9, č. 2 (2016), s. 219-232 ISSN 1874-1738 Institutional support: RVO:60077344 Keywords : structured population * ideal free distribution * game theory Subject RIV: EH - Ecology, Behaviour Impact factor: 1.221, year: 2016 http://link.springer.com/article/10.1007%2Fs12080-015-0290-8

  1. IbM TUNA NETRA SUDARNO DAN SUPARDIONO DI KARANGANYAR

    Directory of Open Access Journals (Sweden)

    Isnaini Herawati

    2015-09-01

    Full Text Available Today, a massage parlors have developed, including massage parlors by blind people. In Karanganyar, there are 9 massage parlors done by blind people under PERTUNI (Society for the Blind Indonesia, and the number was not included in the outposts or sub-districts in Karanganyar. There are two business units that will be a partner, namely Mr. Sudarno and Mr. Supardiono. This community service aims to increase the number of customers and to improve the quality of the Blind Massage services Sudarno and Supardiono. Activities that have been implemented are: the observation of the partners’ needs, fulfilling the needs of  partners, training on massage and aromatherapy, and improve promotional partner with signboards at strategic places. Partner 1 already has 3 pieces adequate massage booths, even one cubicle equipped with air conditioning. The first partners are still in need of help for marketing. Partner 2 requires repair his massage booths so as to provide convenience for customers.

  2. Population Recovery of Nicobar Long-Tailed Macaque Macaca fascicularis umbrosus following a Tsunami in the Nicobar Islands, India.

    Science.gov (United States)

    Velankar, Avadhoot D; Kumara, Honnavalli N; Pal, Arijit; Mishra, Partha Sarathi; Singh, Mewa

    2016-01-01

    Natural disasters pose a threat to isolated populations of species with restricted distributions, especially those inhabiting islands. The Nicobar long tailed macaque.Macaca fascicularis umbrosus, is one such species found in the three southernmost islands (viz. Great Nicobar, Little Nicobar and Katchal) of the Andaman and Nicobar archipelago, India. These islands were hit by a massive tsunami (Indian Ocean tsunami, 26 December 2004) after a 9.2 magnitude earthquake. Earlier studies [Umapathy et al. 2003; Sivakumar, 2004] reported a sharp decline in the population of M. f. umbrosus after thetsunami. We studied the distribution and population status of M. f. umbrosus on thethree Nicobar Islands and compared our results with those of the previous studies. We carried out trail surveys on existing paths and trails on three islands to get encounter rate as measure of abundance. We also checked the degree of inundation due to tsunami by using Normalized Difference Water Index (NDWI) on landsat imageries of the study area before and after tsunami. Theencounter rate of groups per kilometre of M. f. umbrosus in Great Nicobar, Little Nicobar and Katchal was 0.30, 0.35 and 0.48 respectively with the mean group size of 39 in Great Nicobar and 43 in Katchal following the tsunami. This was higher than that reported in the two earlier studies conducted before and after the tsunami. Post tsunami, there was a significant change in the proportion of adult males, adult females and immatures, but mean group size did not differ as compared to pre tsunami. The results show that population has recovered from a drastic decline caused by tsunami, but it cannot be ascertained whether it has reached stability because of the altered group structure. This study demonstrates the effect of natural disasters on island occurring species.

  3. Effect of different humidity levels on the biology of longtailed mealy bug pseudococcus longispinus (targioni and tozzetti) (homoptera: pseudococidae)

    International Nuclear Information System (INIS)

    Gillani, W.A.

    2009-01-01

    On determining the effects of different humidity levels on the biology of mealy bug Pseudococcus longispinus (Targioni and Tozzetti), it was found that the relative humidity (RH) at 35%, 55% and 75% had no effect on pre-adult development, adult longevity, life span and fecundity of P. longispinus. The survival of pre-adult stages was minimal at 35% RH. Sex ratio was male-biased at 35% RH and female-biased at 75% RH. (author)

  4. A pair choice test to identify female mating patterns in relation to ovulation in long-tailed macaques (Macaca fascicularis)

    NARCIS (Netherlands)

    Nikitopoulos, E.; Heistermann, M.; Vries, Han de; Hooff, J.A.R.A.M. van; Sterck, E.H.M.

    2005-01-01

    Female mammals may exert choice for mates directly by mating selectively. Alternatively, females can mate promiscuously, allowing sperm competition and/or cryptic female choice to operate. Primate sexual behaviour is probably a compromise between conflicting male and female interests, so it may be

  5. Transport properties of the continuous-time random walk with a long-tailed waiting-time density

    International Nuclear Information System (INIS)

    Weissman, H.; Havlin, S.; Weiss, G.H.

    1989-01-01

    The authors derive asymptotic properties of the propagator p(r, t) of a continuous-time random walk (CTRW) in which the waiting time density has the asymptotic form ψ(t) ∼ T α /t α+1 when t >> T and 0 = ∫ 0 ∞ τψ(τ)dτ is finite. One is that the asymptotic behavior of p(0, t) is demonstrated by the waiting time at the origin rather than by the dimension. The second difference is that in the presence of a field p(r, t) no longer remains symmetric around a moving peak. Rather, it is shown that the peak of this probability always occurs at r = 0, and the effect of the field is to break the symmetry that occurs when < ∞. Finally, they calculate similar properties, although in not such great detail, for the case in which the single-step jump probabilities themselves have an infinite mean

  6. Developmental Anatomy of Cerebellum of Long-Tailed Macaque (Macaca fascicularis at the First Trimester of Gestation

    Directory of Open Access Journals (Sweden)

    Tri Wahyu Pangestiningsih

    2014-11-01

    Full Text Available Long tailed macaque was one of animal models in biomedical research because it has  many similarities with humans, both anatomical and physiological properties. There were many research about cerebellum associated with its role in the coordination of muscle activity. Understanding of normal development of cerebellum long tailed macaque may help to understand about the development in human cerebellum and its abnormalities. Embryonic and fetal brain samples were obtained through caesarean section and were  then made for histological preparation stained with cresyl violet. Staining results were observed using a microscope with a digital camera. Images obtained are processed by graphics software Adobe Photoshop CS 8.0. Cerebellum Macaca fascicularis Ed40 showed the isthmus and rhombic lip that were composed of ventricular layer, mantle layer, and marginal layer. Cerebellum Macaca fascicularis Fd55 showed future lobes and future  fissures, but the cortex and medulla are not bounded clear. The cortex consisted of the external granular layer, neuroblast basket, and neuroblast stellate, while the  medulla consisted of neuroblast deep cerebellar nuclei. From this research, we concluded that neurons were on stage of proliferation and migration in the embryo aged 40 days, then differentiated and migrated to form cortex  cerebellum and deep cerebellar nuclei at the age of 55 days, but the development of the cerebellum was not fully completed yet.

  7. Comparative ecology of widely distributed pelagic fish species in the North Atlantic: Implications for modelling climate and fisheries impacts

    Science.gov (United States)

    Trenkel, V. M.; Huse, G.; MacKenzie, B. R.; Alvarez, P.; Arrizabalaga, H.; Castonguay, M.; Goñi, N.; Grégoire, F.; Hátún, H.; Jansen, T.; Jacobsen, J. A.; Lehodey, P.; Lutcavage, M.; Mariani, P.; Melvin, G. D.; Neilson, J. D.; Nøttestad, L.; Óskarsson, G. J.; Payne, M. R.; Richardson, D. E.; Senina, I.; Speirs, D. C.

    2014-12-01

    This paper reviews the current knowledge on the ecology of widely distributed pelagic fish stocks in the North Atlantic basin with emphasis on their role in the food web and the factors determining their relationship with the environment. We consider herring (Clupea harengus), mackerel (Scomber scombrus), capelin (Mallotus villosus), blue whiting (Micromesistius poutassou), and horse mackerel (Trachurus trachurus), which have distributions extending beyond the continental shelf and predominantly occur on both sides of the North Atlantic. We also include albacore (Thunnus alalunga), bluefin tuna (Thunnus thynnus), swordfish (Xiphias gladius), and blue marlin (Makaira nigricans), which, by contrast, show large-scale migrations at the basin scale. We focus on the links between life history processes and the environment, horizontal and vertical distribution, spatial structure and trophic role. Many of these species carry out extensive migrations from spawning grounds to nursery and feeding areas. Large oceanographic features such as the North Atlantic subpolar gyre play an important role in determining spatial distributions and driving variations in stock size. Given the large biomasses of especially the smaller species considered here, these stocks can exert significant top-down pressures on the food web and are important in supporting higher trophic levels. The review reveals commonalities and differences between the ecology of widely distributed pelagic fish in the NE and NW Atlantic basins, identifies knowledge gaps and modelling needs that the EURO-BASIN project attempts to address.

  8. Comparison of Mitochondrial Reactive Oxygen Species Production of Ectothermic and Endothermic Fish Muscle

    Directory of Open Access Journals (Sweden)

    Lilian Wiens

    2017-09-01

    Full Text Available Recently we demonstrated that the capacity of isolated muscle mitochondria to produce reactive oxygen species, measured as H2O2 efflux, is temperature-sensitive in isolated muscle mitochondria of ectothermic fish and the rat, a representative endothermic mammal. However, at physiological temperatures (15° and 37°C for the fish and rat, respectively, the fraction of total mitochondrial electron flux that generated H2O2, the fractional electron leak (FEL, was far lower in the rat than in fish. Those results suggested that the elevated body temperatures associated with endothermy may lead to a compensatory decrease in mitochondrial ROS production relative to respiratory capacity. To test this hypothesis we compare slow twitch (red muscle mitochondria from the endothermic Pacific bluefin tuna (Thunnus orientalis with mitochondria from three ectothermic fishes [rainbow trout (Oncorhynchus mykiss, common carp (Cyprinus carpio, and the lake sturgeon (Acipenser fulvescens] and the rat. At a common assay temperature (25°C rates of mitochondrial respiration and H2O2 efflux were similar in tuna and the other fishes. The thermal sensitivity of fish mitochondria was similar irrespective of ectothermy or endothermy. Comparing tuna to the rat at a common temperature, respiration rates were similar, or lower depending on mitochondrial substrates. FEL was not different across fish species at a common assay temperature (25°C but was markedly higher in fishes than in rat. Overall, endothermy and warming of Pacific Bluefin tuna red muscle may increase the potential for ROS production by muscle mitochondria but the evolution of endothermy in this species is not necessarily associated with a compensatory reduction of ROS production relative to the respiratory capacity of mitochondria.

  9. Differential loggerhead by-catch and direct mortality due to surface longlines according to boat strata and gear type

    Directory of Open Access Journals (Sweden)

    Juan A. Camiñas

    2006-12-01

    Full Text Available Surface longline gears are used to fish different species, mainly albacore Thunnus alalunga (Bonnaterre, 1788, bluefin tuna Thunnus thynnus (Linnaeus, 1758, and swordfish Xiphias gladius Linnaeus, 1758, and are considered highly dangerous for threatened marine turtles. Loggerheads Caretta caretta (Linnaeus, 1758 can be incidentally captured by surface longlines. A number of captured individuals die during the fishing operation, which we consider direct mortality due to fishing. We analysed the relative loggerhead by-catch and direct mortality associated with each type of boat and gear from April to December during the period 1999-2004 in the Spanish surface longline fleet that fishes in the western Mediterranean Sea, an important fishing area for this fleet. We used different indices to compute the catch per unit effort (CPUE according to the number of hooks and to the number of fishing operations for each type of boat and gear. Both by-catch and direct mortality differed significantly according to the type of boat and gear. With respect to the number of hooks, boats longer than 12 m not using a roller and targeting bluefin tuna captured the highest number of loggerheads, whereas boats longer than 12 m with a roller that targeted swordfish caused the highest direct mortality. With respect to the number of fishing operations, boats longer than 12 m without a roller that targeted albacore captured the highest number of loggerheads; the highest direct mortality was caused by this type of boat and by boats longer than 12 m using a roller and targeting swordfish.

  10. THE RESTORATION OF PAINTING “NUDE” BY SAİP TUNA FOUND IN COLLECTION OF THE ANKARA STATE MUSEUM OF PAINTINGS AND SCULPTURES [Tr: ANKARA DEVLET RESİM VE HEYKEL MÜZESİ KOLEKSİYONUNDA BULUNAN, SAİP TUNA’YA AİT “NÜ” İSİMLİ TABLONUN RESTORASYONU

    Directory of Open Access Journals (Sweden)

    Berna ÇAĞLAR ERYURT

    2018-04-01

    Full Text Available Oil painting conservation is a conservation field which is considerably sensitive and requires different fields of specialization from storage to exhibition, from transportation to packaging, from cleaning to retouching. In our country, the fewness of specialists and insufficiency of researches and publications in this field is noticeable and it is observed that the few works that are conducted are not based on scientific foundations. In our museums, many artworks which were subject to false applications by non-specialists or which were harmed because they were not kept in appropriate conditions are encountered. One of these artworks is the oil painting titled “Nu” by one of the important Republican artists, Saip Tuna (1904-1974 found in the storage room of Ankara State Museum of Paintings and Sculptures. In this study, examination and documentation procedures along with conservation and restoration methods carried out with scientific methods on this painting are discussed. Within this scope, the painting in question was examined by non-destructive (visual and microscopic methods, the deteriorations and previous restorations in the constituting layers of the painting were detected with the help of inclined light, illumination from behind and ultraviolet light. It was observed that the previous restoration treatments made by using materials/methods, such as an intense varnishing application and a faulty retouching, which are not suitable for the original structure of the artwork along with the problems arising from the unfavourable storing conditions had caused deteriorations/damages on the artwork. Restoration works of the painting were carried out according to the detected deteriorations and damages. The data obtained through this work exhibit the importance of the field specialization in the success of conservation and restoration applications as much as the necessity of detection and diagnosis based on scientific research and examination

  11. Ziştovi ve Yaş Antlaşması Arasında Tuna Kıyısında Bir Osmanlı Kenti: Silistre (1791–1793 The Danube Coast Between The Treaty Of Ziştovi And Yaş An Ottoman City: Silistra (1791 – 1793

    Directory of Open Access Journals (Sweden)

    Hava SELÇUK

    2013-07-01

    Full Text Available Silistra Otoman Empire was an important port city on the banksthe Danube River. Therefore, especially in the river trade and battelswere important tasks. The Province of Silistra had a strategical importance by economical and military means. İt was also on the route of Ottoman-Russian and Otoman-Austria wars geographically. Silistra which is consulted both İbrail and rationing of İstanbul has an important function (cureal, hardtack, Weapons etc.. This study has been used as a source the book number 50 of Şeryiyye registries((1791-1793. Before and after the book number 50 in these treaties treaties from Silistra political, social, economic, and military issues contains information . Ser’iyye Sicilleri, that's court records, is an important source in revealing the political, judicial and social conditions of Ottoman society. Seri'yye Sicili Numbered 50 of Silistra, at Bulgarian archive “National Biblioteque”, forms the backbone of this paper. The record book in question includes 233 documents covering (apostasy, Austrian Prisoners such the economic and social events as heritage cases, family, appointment decisions of some officials, ship building, ambassy, tax (cereal, duhan, adat-ı ağnam. Bandit, the grain ship with move conversion topics are explored. The imperial orders (ferman and emir which all shed light on the military issues have been recorded in the ser'iye sicilleri. Based on the court records between 1791 and 1793 of Silistra, it will be mentioned about the social life of the town. Silistre Osmanlı Devleti’nin Tuna Nehri kıyısında bulunan önemlibir liman kenti idi. Bu nedenle özellikle nehir ticareti ve donanmasavaşlarında önemli görevler üslenmekte idi. Ekonomik ve askerî açıdanstratejik bir konuma sahip olan Silistre coğrafi açıdan da Osmanlı-Rusve Osmanlı-Avusturya savaşlarının ana güzergâhı üzerindeydi. Bunedenle Silistre gerek İbrail, gerek İstanbul’un iaşe ihtiyac

  12. Positive Interactions among Foraging Seabirds, Marine Mammals and Fishes and Implications for Their Conservation

    Directory of Open Access Journals (Sweden)

    Richard R. Veit

    2017-10-01

    Full Text Available There is increasing recognition of the importance of “positive interactions” among species in structuring communities. For seabirds, an important kind of positive interaction is the use of birds of the same species, birds of other species, and other marine predators such as cetaceans, seals and fishes as cues to the presence of prey. The process by which a single bird uses, say, a feeding flock of birds as a cue to the presence of prey is called “local enhancement” or “facilitation.” There are subtly different uses of each of these terms, but the issue we address here is the ubiquity of positive interactions between seabirds and other marine predators when foraging at sea, and whether as a result of their associations the feeding success, and therefore presumably the fitness, of individual seabirds is increased. If this contention is true, then it implies that conservation of any one species of seabird must take into consideration the status and possible conservation of those species that the focal species uses as a cue while foraging. For example, conservation of great shearwaters (Ardenna gravis, which often feed over tuna (e.g., Thunnus schools, should take in to consideration conservation of tuna. Ecosystem management depends on understanding the importance of such processes; the loss of biodiversity, and the consequent threat to foraging success, may be a substantial threat to the stability of marine ecosystems.

  13. Levels of polonium-210 in highly consumed sea foods from a fish market of the city of Niteroi, RJ-Brazil

    International Nuclear Information System (INIS)

    Marsico, Eliane T.; Sao Clemente, Sergio C. de; Kelecom, Alphonse; Gouvea, Rita de Cassia S.

    2007-01-01

    Polonium-210 ( 210 Po), a short-lived member from the uranium series, is broadly distributed in Nature being among all alpha-emitters the major contributor to the internal dose in man. Studies of diets have shown that marine foods are important sources of this radionuclide. The levels of 210 Po have been determined in three highly consumed marine species, the fishes Sardinella brasiliensis (sardine) and Thunnus atlanticus (tuna), and the shrimp Litopenaeus brasiliensis, purchased from the Niteroi (RJ, Brazil) fish market, and caught along the coast of the state of Rio de Janeiro. Doses of 210 Po were determined for the entire organisms and for some tissues and organs, such as eyes, heart, gills, muscle, stomach liver, intestine and pyloric caecal (fishes) or eyes, head content, exoskeleton, muscle, hepatopancreas and pleopods. 210 Po is not uniformly distributed within these species, the highest levels being observed for sardine in the intestine (1634.6 mBq g-1), tuna in pyloric caecal (4656.1 mBq g-1) and shrimp in the hepatopancreas (1460.5 mBq g-1). The 210 Po activities in sardine, tuna and shrimp, calculated on a mean whole-organism basis, were 64.6, 34.5 and 39.5 Bq kg-1 (dry weight) respectively, with corresponding concentration factors of 7.2 x104, 3.8 x104 and 4.4 x104. Considering body distribution, almost 60% of the total activity is concentrated in the pyloric caecal of both fishes and in the hepatopancreas of the shrimp. In turn, the edible parts concentrate much less activity. (author)

  14. Levels of polonium-210 in highly consumed sea foods from a fish market of the city of Niteroi, RJ-Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Marsico, Eliane T.; Sao Clemente, Sergio C. de [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Faculdade de Veterinaria. Dept. de Tecnologia de Alimentos; Kelecom, Alphonse; Gouvea, Rita de Cassia S. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Dept. de Biologia Geral. Lab. de Radiobiologia e Radiometria Pedro Lopes dos Santos - LARARA

    2007-07-01

    Polonium-210 ({sup 210}Po), a short-lived member from the uranium series, is broadly distributed in Nature being among all alpha-emitters the major contributor to the internal dose in man. Studies of diets have shown that marine foods are important sources of this radionuclide. The levels of {sup 210}Po have been determined in three highly consumed marine species, the fishes Sardinella brasiliensis (sardine) and Thunnus atlanticus (tuna), and the shrimp Litopenaeus brasiliensis, purchased from the Niteroi (RJ, Brazil) fish market, and caught along the coast of the state of Rio de Janeiro. Doses of {sup 210}Po were determined for the entire organisms and for some tissues and organs, such as eyes, heart, gills, muscle, stomach liver, intestine and pyloric caecal (fishes) or eyes, head content, exoskeleton, muscle, hepatopancreas and pleopods. {sup 210}Po is not uniformly distributed within these species, the highest levels being observed for sardine in the intestine (1634.6 mBq g-1), tuna in pyloric caecal (4656.1 mBq g-1) and shrimp in the hepatopancreas (1460.5 mBq g-1). The {sup 210}Po activities in sardine, tuna and shrimp, calculated on a mean whole-organism basis, were 64.6, 34.5 and 39.5 Bq kg-1 (dry weight) respectively, with corresponding concentration factors of 7.2 x104, 3.8 x104 and 4.4 x104. Considering body distribution, almost 60% of the total activity is concentrated in the pyloric caecal of both fishes and in the hepatopancreas of the shrimp. In turn, the edible parts concentrate much less activity. (author)

  15. Colour cues for leaf food selection by long-tailed macaques (Macaca fascicularis) with a new suggestion for the evolution of trichromatic colour vision.

    Science.gov (United States)

    Lucas, P W; Darvell, B W; Lee, P K; Yuen, T D; Choong, M F

    1998-01-01

    Leaf colour, size and toughness were investigated in five plant species important in the diet of Macaca fascicularis in Singapore. Leaf colour and size were examined as potential visual cues for food selection, whereas toughness mirrored fibre content, the inverse of food quality. As leaves matured, they changed colour and toughened. Leaf lightness and yellowness were strongly negatively correlated with toughness, but variation in both the red-green axis of the CIE Lab colour space and leaf size were not. Leaves selected as food by the macaques were distinguished by being very light, yellow to slightly green. Some leaves were dappled with red. The literature suggests that these leaves are relatively rich in protein without being tough and therefore would be sought after by primates. We argue that leaf colour is an important indicator of the nutritive value of leaves. Trichromatic vision is an important advantage in finding those palatable leaves that are dappled red. These would appear dark to dichromatic primates and be deceptive by making leaves look older (lower in quality) than they actually are. This would decrease the perceived window of feeding opportunity for such primates who would be at a disadvantage in trying to find these leaves. It is possible that trichromatic vision in catarrhine primates may have originally evolved for the detection of red coloration in the leaves of shade-tolerant tropical plants, enabling the better exploitation of a food resource.

  16. Pesquisa de glaucoma juvenil en la provincia de Las Tunas: Estudio preliminar Screening of juvenile glaucoma in the province of Las Tunas: A preliminary study

    Directory of Open Access Journals (Sweden)

    Yunia H Labrada Rodríguez

    2002-12-01

    Full Text Available Se presentan los resultados de una pesquisa oftalmológica realizada a 1 728 pacientes The results of the ophthalmological screening carried out among 1 728 patients under 19 are shown. The diagnosis of juvenile glaucoma was corroborated in 22 of them. Patients were grouped according to age, sex, fundus of the eye, central and peripheral vision. The age group 15-19 was the most affected. Both sexes were similarly affected in this group. Patients with excavation 0.4-0.5 predominated in the series. An early diagnosis was made in 100 % of the cases

  17. Total mercury, cadmium and lead levels in main export fish of Sri Lanka.

    Science.gov (United States)

    Jinadasa, B K K K; Edirisinghe, E M R K B; Wickramasinghe, I

    2014-01-01

    Total mercury (Hg), cadmium (Cd) and lead (Pb) levels were determined in the muscle of four commercialised exported fish species Thunnus albacares (yellowfin tuna), Xiphias gladius (swordfish), Makaira indica (black marlin) and Lutjanus sp (red snapper) collected from the Indian Ocean, Sri Lanka, during July 2009-March 2010 and measured by atomic absorption spectrophotometry. Results show that swordfish (n = 176) contained the highest total Hg (0.90 ± 0.51 mg/kg) and Cd (0.09 ± 0.13 mg/kg) levels, whereas yellowfin tuna (n = 140) contained the highest Pb levels (0.11 ± 0.16 mg/kg). The lowest total Hg (0.16 ± 0.11 mg/kg), Cd (0.01 ± 0.01 mg/kg) and Pb (0.04 ± 0.04 mg/kg) levels were found in red snapper (n = 28). Black marlin (n = 24) contained moderate levels of total Hg (0.49 ± 0.37), Cd (0.02 ± 0.02) and Pb (0.05 ± 0.05). Even though there are some concerns during certain months of the year, this study demonstrates the safety of main export fish varieties in terms of total Hg, Cd and Pb.

  18. Mercury in fish available in supermarkets in Illinois: Are there regional differences

    International Nuclear Information System (INIS)

    Burger, Joanna; Gochfeld, Michael

    2006-01-01

    Media coverage has made the public aware of both the benefits and the risks from eating self-caught fish, but information on contaminants in commercial fish is much more limited, especially on a local level. The U.S. Food and Drug Administration website provides methylmercury data for a variety of fish, but for many species sample sizes are small and data are more than a decade old, whereas commercial fish sources are highly dynamic. A few state agencies are beginning to provide contaminant information for commercial fish, including canned tuna. We examined the mercury concentration of six types of fish purchased in supermarkets in Chicago, Illinois in 2005. We measured total mercury (methylmercury accounts for about 90% of the total mercury in fish). One key question was whether the concentrations of mercury in fish available locally were similar to those reported in other areas of the country and in the FDA U.S. national data base. Such information is critical for the public, especially pregnant women or those planning on pregnancy, making decisions about types and quantities of fish to consume. Some fish are available generally throughout the U.S., but others are more locally available, suggesting a need for site-specific information. This research was stakeholder driven, and reflected local interest in the safety of local fish. There were significant differences in mercury concentrations among the fish, ranging from a mean of 0.03 μg/g (ppm-wet weight) for salmon (Salmo spp.) to 1.41 ppm for swordfish (Xiphias gladius). Maximum values for three species of fish (orange roughy Hoplostethus atianticus, swordfish walleye Sander vitreus) were over 1 ppm (FDA action level), and all of the fish except salmon had some values above 0.5 ppm, the action level set by some states and countries. There were significant differences in mercury concentrations among three types of canned tuna (Thunnus spp): 'gourmet tuna' had the least amount of mercury, and white tuna had the

  19. Mercury in fish available in supermarkets in Illinois: Are there regional differences

    Energy Technology Data Exchange (ETDEWEB)

    Burger, Joanna [Division of Life Sciences, Rutgers University, 604 Allison Road, Piscataway, New Jersey, 08854-8082 (United States) and Consortium for Risk Evaluation with Stakeholder Participation (CRESP) and Environmental and Occupational Health Sciences Institute (EOHSI), Piscataway, New Jersey (United States)]. E-mail: burger@biology.rutgers.edu; Gochfeld, Michael [Consortium for Risk Evaluation with Stakeholder Participation (CRESP), and Environmental and Occupational Health Sciences Institute (EOHSI), Piscataway, New Jersey (United States); Environmental and Community Medicine, UMDNJ-Robert Wood Johnson Medical School, Piscataway, New Jersey, 08854 (United States)

    2006-08-31

    Media coverage has made the public aware of both the benefits and the risks from eating self-caught fish, but information on contaminants in commercial fish is much more limited, especially on a local level. The U.S. Food and Drug Administration website provides methylmercury data for a variety of fish, but for many species sample sizes are small and data are more than a decade old, whereas commercial fish sources are highly dynamic. A few state agencies are beginning to provide contaminant information for commercial fish, including canned tuna. We examined the mercury concentration of six types of fish purchased in supermarkets in Chicago, Illinois in 2005. We measured total mercury (methylmercury accounts for about 90% of the total mercury in fish). One key question was whether the concentrations of mercury in fish available locally were similar to those reported in other areas of the country and in the FDA U.S. national data base. Such information is critical for the public, especially pregnant women or those planning on pregnancy, making decisions about types and quantities of fish to consume. Some fish are available generally throughout the U.S., but others are more locally available, suggesting a need for site-specific information. This research was stakeholder driven, and reflected local interest in the safety of local fish. There were significant differences in mercury concentrations among the fish, ranging from a mean of 0.03 {mu}g/g (ppm-wet weight) for salmon (Salmo spp.) to 1.41 ppm for swordfish (Xiphias gladius). Maximum values for three species of fish (orange roughy Hoplostethus atianticus, swordfish walleye Sander vitreus) were over 1 ppm (FDA action level), and all of the fish except salmon had some values above 0.5 ppm, the action level set by some states and countries. There were significant differences in mercury concentrations among three types of canned tuna (Thunnus spp): 'gourmet tuna' had the least amount of mercury, and white

  20. ANALISIS PERIKANAN HUHATE DI PERAIRAN LARANTUKA, FLORES

    Directory of Open Access Journals (Sweden)

    Mohamad Adha Akbar

    2016-11-01

    Full Text Available Informasi mengenai beberapa aspek perikanan huhate sangat diperlukan sebagai bahan untuk perencanaan pengelolaan perikanan yang berkelanjutan. Penelitian ini dilakukan di Larantuka, Flores Timur pada tahun 2014 dengan tujuan untuk menganalisis perikanan huhate sebagai salah satu tulang punggung perikanan TCT. Kegiatan penelitian diprioritaskan pada analisis unit alat tangkap, daerah penangkapan, komposisi hasil tangkapan dan estimasi Total Faktor Produktivitas (TFP perikanan huhate. Basis data pengukuran adalah himpunan  data pendaratan dan observasi lapang. Hasil penelitian menunjukan bahwa karakteristik armada terdiri dari kapal yang terbuat dari fibreglass dengan kisaran bobot kapal 6 - 30 GT. Daerah penangkapan di sekitar perairan Laut Sawu dan Laut Flores. Hasil tangkapan utama didominansi oleh cakalang (Katsuwonus pelamis sebanyak 82%, juwana tuna (Thunnus spp. 17% dan tongkol (Auxis spp. 1% serta hasil tangkapan ikutan lemadang (Coryphaena hippurus dan marlin (Makaira spp. < 1%. Hasil analisis tangkapan per unit upaya (CPUE memberikan nilai rata-rata sebesar 1,1 ton/trip (0,4-1,7 ton/trip dengan nilai tertinggi terjadi pada Februari, sedangkan terendah terjadi pada Januari. Hasil penelitian menunjukkan terdapat hubungan yang signifikan antara tren bulanan CPUE dan nilai TFP.

  1. Isolation of heat-tolerant myoglobin from Asian swamp eel Monopterus albus.

    Science.gov (United States)

    Chotichayapong, Chatrachatchaya; Wiengsamut, Kittipong; Chanthai, Saksit; Sattayasai, Nison; Tamiya, Toru; Kanzawa, Nobuyuki; Tsuchiya, Takahide

    2012-10-01

    Myoglobin from Asian swamp eel Monopterus albus was purified from fish muscle using salt fractionation followed by column chromatography and molecular filtration. The purified Mb of 0.68 mg/g wet weight of muscle was determined for its molecular mass by MALDI-TOF-MS to be 15,525.18 Da. Using isoelectric focusing technique, the purified Mb showed two derivatives with pI of 6.40 and 7.12. Six peptide fragments of this protein identified by LC-MS/MS were homologous to Mbs of sea raven Hemitripterus americanus, yellowfin tuna Thunnus albacores, blue marlin Makaira nigicans, common carp Cyprinus carpio, and goldfish Carassius auratus. According to the Mb denaturation, the swamp eel Mb had thermal stability higher than walking catfish Clarias batrachus Mb and striped catfish Pangasius hypophthalmus Mb, between 30 and 60 (°)C. For the thermal stability of Mb, the swamp eel Mb showed a biphasic behavior due to the O(2) dissociation and the heme orientation disorder, with the lowest increase in both Kd(f) and Kd(s). The thermal sensitivity of swamp eel Mb was lower than those of the other Mbs for both of fast and slow reaction stages. These results suggest that the swamp eel Mb globin structure is thermally stable, which is consistent with heat-tolerant behavior of the swamp eel particularly in drought habitat.

  2. Potential toxicological hazard due to endocrine-disrupting chemicals on Mediterranean top predators: State of art, gender differences and methodological tools

    International Nuclear Information System (INIS)

    Fossi, M.C.; Casini, S.; Marsili, L.

    2007-01-01

    Man-made endocrine-disrupting chemicals (EDCs) range across all continents and oceans. Some geographic areas are potentially more threatened than others: one of these is the Mediterranean Sea. Levels of some xenobiotics are much higher here than in other seas and oceans. In this paper we review the final results of a project supported by the Italian Ministry of the Environment, in which the hypothesis that Mediterranean top predator species (such as large pelagic fish and marine mammals) are potentially at risk due to EDCs was investigated. We illustrate the need to develop and apply sensitive methodological tools, such as biomarkers (Vitellogenin, Zona Radiata proteins and CYP1A activities) for evaluation of toxicological risk in large pelagic fish top predators (Swordfish (Xiphias gladius), Bluefin Tuna (Thunnus thynnus thynnus)) and nondestructive biomarkers (CYP1A activities and fibroblast cell culture in skin biopsy), for the hazard assessment of threatened marine mammals species (Striped Dolphin, (Stenella coeruleoalba), Bottlenose Dolphin (Tursiops truncatus), Common Dolphin (Delphinus delphis) and Fin Whale (Balaenoptera physalus))exposed to EDCs. Differential gender susceptibility to EDCs is also explored both in large pelagic fish and in cetaceans. In cetaceans, male specimens showed higher cytochrome P450 induction (BPMO in skyn biopsies, CYP2B in fibroblasts cell cultures) by xenobiotics with respect to females

  3. The influence of finfish aquaculture on benthic fish and crustacean assemblages in Fitzgerald Bay, South Australia

    Directory of Open Access Journals (Sweden)

    Jason E. Tanner

    2015-09-01

    Full Text Available The influence of sea-cage aquaculture on wildfish assemblages has received little attention outside of Europe. Sea-cage aquaculture of finfish is a major focus in South Australia, and while the main species farmed is southern bluefin tuna (Thunnus maccoyii, there is also an important yellowtail kingfish (Seriola lalandi industry. Yellowtail kingfish aquaculture did not appear to have any local or regional effects on demersal assemblages (primarily fish, but also some crustaceans surveyed by baited remote underwater video (BRUV in Fitzgerald Bay. We did, however, detect small scale spatial variations in assemblages within the bay. The type of bait used strongly influenced the assemblage recorded, with significantly greater numbers of fish attracted to deployments where sardines were used as the bait to compared to those with no bait. The pelleted feed used by the aquaculture industry was just as attractive as sardines at one site, and intermediate between sardines and no bait at the other. There was significant temporal variability in assemblages at both farm sites and one control site, while the second control site was temporally stable (over the 9 weeks of the study. Overall, the results suggested that aquaculture was having little if any impact on the abundance and assemblage structure of the demersal macrofauna in Fitzgerald Bay.

  4. A cascade of warming impacts brings bluefin tuna to Greenland waters

    DEFF Research Database (Denmark)

    MacKenzie, Brian R.; Payne, Mark R.; Boje, Jesper

    2014-01-01

    Rising ocean temperatures are causing marine fish species to shift spatial distributions and ranges, and are altering predator-prey dynamics in food webs. Most documented cases of species shifts so far involve relatively small species at lower trophic levels, and consider individual species in ec...... impacts is restructuring the food web in east Greenland waters.......Rising ocean temperatures are causing marine fish species to shift spatial distributions and ranges, and are altering predator-prey dynamics in food webs. Most documented cases of species shifts so far involve relatively small species at lower trophic levels, and consider individual species...

  5. 77 FR 15712 - Atlantic Highly Migratory Species; 2012 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2012-03-16

    ... annual meeting, ICCAT recommended a TAC of 1,750 mt annually for 2011 and for 2012, inclusive of dead... 868.6 mt, which is 175 mt less than the amount of quota (inclusive of dead discards) allowed under... 182.0 SUBQUOTAS: SUBQUOTAS: School 94.9 School 94.9 Reserve 17.6 Reserve 17.6 North 36.5 North 36.5...

  6. 76 FR 74003 - Atlantic Highly Migratory Species; Adjustments to the Atlantic Bluefin Tuna General and Harpoon...

    Science.gov (United States)

    2011-11-30

    ... price for BFT exported to Japan is dependent on a number of factors, including: Quality, size, and.... Lowering of the minimum size could be achieved in a resource neutral fashion with a modest transfer...

  7. 78 FR 21584 - Atlantic Highly Migratory Species; 2013 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2013-04-11

    ... and for 2012, inclusive of dead discards (ICCAT Recommendation 10-03--Supplemental Recommendation by... 858.4 mt, which is 185.2 mt less than the amount of quota (inclusive of dead discards) allowed under... locations will be physically accessible to people with disabilities. Requests for sign language...

  8. Self Esteem dan Relasi Interpersonal Penyandang Tuna Rungu di Lembaga Deaf ‘N Dumb

    OpenAIRE

    Noorhalia Elcamila, Faya; Halimah, Lilim

    2010-01-01

    All members of Institute for Deaf ´N Dumb have undergone coaching and training skills. Infact, not all the members are having a permanent job because of the lack of a chance than others, and feeling less confident that he is able to produce something so that the skills he has was useless. One of these internal variables that a barrier is self-esteem. Self-assessment of deaf persons who consider themselves not able to relate well with others, especially with the normal people. In this research...

  9. 76 FR 60790 - International Fisheries; Pacific Tuna Fisheries; Fishing Restrictions in the Eastern Pacific Ocean

    Science.gov (United States)

    2011-09-30

    ... coastal fisheries. During the IATTC's 82nd Meeting, IATTC scientific staff showed estimates illustrating a... of the Americas, the 50[deg] N. and 50[deg] S. parallels, and the 150[deg] W. meridian. The members..., Vanuatu, and Venezuela. Currently, the only cooperating non-member is the Cook Islands. Cooperating non...

  10. ESI-PR65, Punta Tuna, Puerto Rico 2000 (Environmental Sensitivity Index Map)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Environmental Sensitivity Index (ESI) maps are an integral component in oil-spill contingency planning and assessment. They serve as a source of information in the...

  11. Inisiasi Tunas Ganda Tanaman Manggis Malinau melalui Kultur In Vitro untuk Perbanyakan Klonal

    Directory of Open Access Journals (Sweden)

    Endang Gati Lestari

    2013-10-01

    Full Text Available Mangosteen (Garcinia mangostana L. is one of the most promising tropical fruits for export. The major constraint toincrease fruit production of the spesies is the long juvenile period. Seedless, sweet and juicy variety of mangosteen had beenfound in Malinau. In vitro propagation technique offers possibility to produce sufficient number of seedlings any time. Thisresearch was aimed at obtaining the appropriate media formula to enhance shoot proliferation. This research consisted ofshoot induction and multiplication and shoot elongation. The materials were the fresh mangosteen seeds from the Malinaumangosteen trees. The explant used in the trial was seeds which were divided into four slices. The use of 8 to 16 mg BA L-1combined with 0.2 mg thidiazuron L-1 resulted in the best shoot induction of 52 shoot buds per explant at the 6th week afterplanting with the mean height of 0.3 cm. Upon subculturing in to the similar media, the number of shoot tends to increase.For multiplication, low concentration of BA (2 to 4 mg L-1 and thidiazuron 0.05 mg L-1 were applied to increase the numbersof shoots. The total shoot number obtained in the media with 0.05 thidiazuron without BA was 11.25 and in the media with 2mg BA L-1 + 0.05 mg thidiazuron L-1 was 8.7 shoot explant-1. The result showed that the best media for shoot elongation wasMS + 1 mg BA L-1 + 2 mg kinetin L-1. The length of the shoots were in the range of 0.5-0.8 cm.Keywords: BA, Garcinia mangostana, in vitro culture, shoot multiplication, thidiazuron

  12. Effects of social factors on fishing effort: The case of the Philippine tuna purse seine fishery

    NARCIS (Netherlands)

    Libre, S.V.D.; Voorn, van G.A.K.; Broeke, Ten G.A.; Bailey, M.L.; Berentsen, P.B.M.; Bush, S.R.

    2015-01-01

    High fishing effort remains in many of the world’s fisheries despite a variety of policies that have been implemented to reduce it. These policies have predominantly focused on models of cause and effect that ignore the possibility that the intended outcomes are altered by social behavior and

  13. Generation of Dutch referring expressions using the D-TUNA corpus

    NARCIS (Netherlands)

    Hoek, Marissa; Theune, Mariet; Gatt, A.; van Gompel, R.; Gurman-Bard, E.; Krahmer, E.; van Deemter, K.

    This paper describes our research into generating Dutch noun phrases as descriptions of furniture objects or people. This is usually done in two steps: attribute selection and realisation. This research focuses only on the realisation step: generating a noun phrase from given attributes. The

  14. RAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas

    KAUST Repository

    Dí az-Arce, Natalia; Arrizabalaga, Haritz; Murua, Hilario; Irigoien, Xabier; Rodrí guez-Ezpeleta, Naiara

    2016-01-01

    conservation and management strategies for these species. Previous attempts based on mitochondrial and nuclear markers were unsuccessful in inferring a congruent and reliable phylogeny, probably due to mitochondrial introgression events and lack of enough

  15. INDUKSI PERTUMBUHAN TUNAS DARI EKSPLAN ANGGREK Dendrobium Heterocarpum Lindl. DENGAN PEMBERIAN HORMON ZEATIN DAN NAA

    Directory of Open Access Journals (Sweden)

    Ni Luh Putu Kayika Febryanti

    2017-04-01

    Full Text Available Dendrobium heterocarpum Lindl. is a native orchid in Indonesia. Its population continue to decline due to unsustainable exploitation. One solution to increase its population is via in vitro technique propagation. This research aimed to determine effect of hormone addition (Zeatin and NAA to induce shoot multiplication of D. heterocarpum Lindl. grown in Murashige and Skoog (MS basic medium. The research was conducted in Tissue Culture Laboratory, Department of Biology, Faculty of Mathematics and Science, Udayana University from November 2015 until March 2016. The experiment employed Completely Randomized Design (CRD with 20 combinations of treatments, with three replicates each treatment. The treatment werer addition of Zeatin and NAA, with five concentrations of Zeatin (0, 0.1, 0,5, sweet corn and hybrids corn as the natural Zeatin; four NAA concentrations (0, 0.05, 0.1 and 0.5. Variable recorded include such as the number of shoots, roots and explant’s vigor. The quantitative data which include number of leaves and shoots after 12 weeks, were analyzed using Analysis of Variance (ANOVA; and if significantly different, tested further using Duncan Multiple Range Test (DMRT at 5% level. Z5N3 medium revealed significantly different on amount of leaves and shoot height and also the best medium on amount of roots. Best hormone combination that can induce multiplication of new shoots are medium Z4N3 and Z5N1.

  16. Perbanyakan In Vitro Sansevieria trifasciata ‘Lorentii’: Regenerasi Tunas, Pengakaran, dan Aklimatisasi Planlet

    Directory of Open Access Journals (Sweden)

    , Yusnita

    2013-10-01

    Full Text Available This research aimed to study effects of benzyladenine (BA on in vitro shoot formation and effects of indolebutyric acid(IBA and acclimatization media on ex vitro rooting and acclimatization of Sansevieria trifasciata ‘Lorentii’. Leaf segmentswere taken from young fully-expanded leaves, surface sterilized and cultured on Murashige and Skoog (MS basal mediumcontaining 0.25 mg L-1 2,4-dichlorophenoxyacetic acid (2,4-D for 2 weeks, transferred to medium without growth regulatorfor 2 weeks, and then subcultured on MS medium containing BA (0, 0.5, 1 and 2 and 5 mg L-1. The results showed thatadventitious shoot regeneration occured after callus formation. The best BA concentration was 2 mg L-1, producing 4.5 shootsper explants in 3 months and 11.1 shoots per explant in 4 months. Application of 2000 ppm IBA and the use of acclimatization  medium consisting rice husk charcoal and compost (1:1 produced the highest number of primary roots, length of roots and root fresh weight. However, the ex vitro rooting did not influence the success of plantlet acclimatization, the survival rate being 96% and there were no significant difference in plant growth.Keywords: benzyladenine, ex vitro, indolebutyric acid, 2,4-dichlorophenoxyacetic acid, micropropagation, Sansevieriatrifasciata

  17. Perbanyakan In Vitro Sansevieria Trifasciata ‘Lorentii': Regenerasi Tunas, Pengakaran, dan Aklimatisasi Planlet

    OpenAIRE

    Yusnita,; Wahyuningsih, Triani; Sulistiana, Puji; Hapsoro, Dwi

    2013-01-01

    This research aimed to study effects of benzyladenine (BA) on in vitro shoot formation and effects of indolebutyric acid(IBA) and acclimatization media on ex vitro rooting and acclimatization of Sansevieria trifasciata ‘Lorentii’. Leaf segmentswere taken from young fully-expanded leaves, surface sterilized and cultured on Murashige and Skoog (MS) basal mediumcontaining 0.25 mg L-1 2,4-dichlorophenoxyacetic acid (2,4-D) for 2 weeks, transferred to medium without growth regulatorfor 2 weeks, an...

  18. Microsatellite development and survey of genetic variation in skipjack tuna Katsuwonus pelamis

    Digital Repository Service at National Institute of Oceanography (India)

    Menezes, M.R.; Noguchi, D.; Nakajima, M.; Taniguchi, N.

    of polymorphism in two samples off the west coast of India (Minicoy Island and Kochi coast) and one sample off the Japan coast. Although significant differentiation (P < 0C101) in the number of specific alleles was observed between Minicoy and Kochi samples, the F...-statistics values among the samples were very low (average ¼ 0C10014) and not significant (P ¼ 0C1284). # 2008 The Authors Journal compilation # 2008 The Fisheries Society of the British Isles Key words: genomic library; heterozygosity; microsatellites; private...

  19. 75 FR 36619 - International Fisheries; South Pacific Tuna Fisheries; Procedures to Request Licenses and a...

    Science.gov (United States)

    2010-06-28

    ... fishery in the past should be afforded greater opportunity to participate in the future. This concept was... would otherwise be the case. This concept also was suggested in the public comments on the ANPR. Finally... board vessels consist of hardware and software that are type-approved by the Treaty Administrator. This...

  20. Sarana Bantu Atletik Lari Tuna Netra Dengan Sistem Kerja Line Follower

    OpenAIRE

    Mestika, Puti Addina; Sriwarno, Andar Bagus

    2012-01-01

    The Blind usually dependent for normal people's role in sports. It makes adaptive sport system manifasted. The method hire normal people as the Blind's escort when they are doing sport. Including running. In its execution, the blind willrun side by side with their partner which is normal. The role of the pair is as an escort who directs to be in the proper position. However, the Blind will not have motivation to workout without them. The used of technology as a tool couldhelp human activity. ...

  1. 77 FR 44161 - Atlantic Highly Migratory Species; 2012 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2012-07-27

    ... order to stay within the ICCAT-recommended U.S. quota, close directed BFT fisheries in the event that... 5, 2011) to consider information about the Deepwater Horizon/BP oil spill and alleged illegal... and use the best available science on the effects of the Deepwater Horizon/BP oil spill and the...

  2. Environmental management strategy for sustainable development in the Naranjo River Basin in Las Tunas

    Directory of Open Access Journals (Sweden)

    Yoandris García Hidalgo

    2014-10-01

    Full Text Available he objective of this paper is to develop an Environmental Mana gement Strategy that is intended to reduce the environmental impacts in the Naranjo river draina ge basin. In order to reach this objective, a diagnosis was done, that consisted in the literature review on the topic as well as the realization of participatory workshops involving different techniques, tools and methods, such as brainstorming, SWOT matrix, DPSIR framework and experts’ approach, for identifying the main envir onmental problems that affect the basin. A geographic information system (GIS was designed for managing natural resources in the basin. Results show that the main environmental problems are: soil degradation , ,deforestation (loss or lack of hidroregulatory fringes on river and reservoir beds, Deterioration of sanitary-hygienic conditions in human settlements, groundwater and air pollution were maily caused by the inadequate land-use planning, which, along with the population’s lack of environmental education, not only contributes to maintaining the environmental impact, but also to increasing it, and can lead to irreversible damages. As part of the strategy, a series of agreed actions was planned to diminish the environmental problems in t he basin, where the social actors take part actively in managing those problems, and favor the decision ma king process which focus on sustainable development

  3. Penambahan Ragi terhadap Multiplikasi Subkultur Tunas Manggis (Garcinia Mangostana L.) secara In Vitro

    OpenAIRE

    Darwati, Herlina; Wulandari, Reine Suci; Erma Safitri, Revina Rizqidia

    2013-01-01

    Garcinia mangostana L. is a species tropical forest that has many benefit. The benefitmangosteen for human life makes it worth as commodity in International market. This aimed to knowing the influence of addition some yeast concentration for bud multiplication of mangosteen and to getting the best yeast concentration for bud multiplication of mangosteen. The research took place in Sylviculture Laboratory at Tanjungpura University for 2 month. The data analyzed to usecompletely randomized desi...

  4. Tuna fisheries and populational dinamic in aggregated schools in the western equatorial Atlantic

    OpenAIRE

    Guelson Batista da Silva

    2013-01-01

    O presente trabalho tem por objetivo a caracterizaÃÃo dos aspectos tecnolÃgicos e da composiÃÃo das capturas, complementados com estudos sobre o crescimento e a alimentaÃÃo das principais espÃcies na pesca de atuns e afins em cardumes associados no AtlÃntico Oeste Equatorial. Para tanto, foram acompanhados 109 desembarques em Areia Branca, RN, no perÃodo entre jun/2010 e mai/2013, assim como o embarque em nove cruzeiros de pesca no perÃodo entre fev/2011 e dez/2012. O estudo de idade e cresci...

  5. Baltic trade war put on three-month hold / Ieva Tuna

    Index Scriptorium Estoniae

    Tuna, Ieva

    2003-01-01

    Baltimaade kaubanduskohtumisel 4. juulil 2003 otsustati kolm kuud oodata protektsionistlike meetmete rakendamisega Läti vastu. Läti esindajad lubasid omalt poolt kaaluda siseturu kaitseks kehtestatud piirangute leevendamist

  6. 78 FR 33240 - International Fisheries; Pacific Tuna Fisheries; Fishing Restrictions in the Eastern Pacific Ocean

    Science.gov (United States)

    2013-06-04

    ... States, Vanuatu, and Venezuela. Bolivia and the Cook Islands are cooperating non-members. International... Pacific bluefin mortality. In addition, the Department of the Interior, Office of Environmental Policy and...

  7. 75 FR 54078 - International Fisheries; Pacific Tuna Fisheries; Vessel Capacity Limit in the Purse Seine Fishery...

    Science.gov (United States)

    2010-09-03

    ... Environmental Policy Act and the IRFA are available at http://swr.nmfs.noaa.gov/ or may be obtained from Rod..., United States, Vanuatu, and Venezuela. The current Cooperating Non-Parties, Cooperating Fishing Entities...

  8. 76 FR 31351 - Safety Requirements and Manning Exemption Eligibility on Distant Water Tuna Fleet Vessels

    Science.gov (United States)

    2011-05-31

    ... DWTF vessel owner/operator may demonstrate such non-availability, namely by recounting the good faith... Authorization Act (CGAA, signed into law (Pub. L. 111-281) on October 15, 2010) reauthorized the use of foreign... wording ``to the extent practicable.'' However, since licensed positions often have contracts associated...

  9. 75 FR 30732 - Atlantic Highly Migratory Species; 2010 Atlantic Bluefin Tuna Quota Specifications

    Science.gov (United States)

    2010-06-02

    ... Specifications AGENCY: National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration.... Response: To monitor the recreational BFT fishery, NMFS depends primarily on the Large Pelagics Survey (LPS... RFA requires the Agency to state the objective of and need for the rule. The objective of this rule is...

  10. Efecto del 100 % de CO2 en la textura de rebanadas de lomo de atún rojo (Thunnus sp. almacenadas en congelación

    Directory of Open Access Journals (Sweden)

    Myrna Luisa Medina Bracamonte

    2017-07-01

    Full Text Available l lomo de atún rojo se comercializa congelado, proceso que favorece su endurecimiento y más durante el almacenamiento. El Empacado en Atmósfera Modificada es una alternativa para incrementar la vida útil de productos alimenticios en el almacenamiento a bajas temperaturas. Se ha recomendado la atmósfera de 100 % de CO2 para el lomo atún almacenado en refrigeración, sin embargo se busca una vida útil de meses para su comercialización. Por ello se planteó evaluar el efecto de la atmósfera de 100 % de CO2 sobre la textura de rebanadas de lomo de atún rojo, congeladas, durante su almacenamiento a -10 y -18 ºC. Las rebanadas individuales de lomo de atún rojo procesadas según Medina-Bracamonte et al. (2014 se empacaron en atmósfera de 100 % de CO2. Se aplicó un Análisis del Perfil de Textura a 0, 15, 30, 54 y 111 días de almacenamiento a cubos de 1 cm3 de las rebanadas, descongeladas y a temperatura ambiental, con un analizador de textura con un émbolo de 75 mm de diámetro, previamente calibrado con una celda de 5 kg y usando el software Texture Expert Exceed, versión 2.54. La atmósfera de 100 % de CO2 a -10 ºC redujo significativamente (p < 0,05 la dureza y masticabilidad de las rebanadas de lomo de atún rojo, y a -18 ºC fue el tratamiento que mostró menor incremento de la cohesividad.

  11. Species catch composition, length structure and reproductive indices of swordfish (Xiphias gladius at Easter Island zone Composición de especies, estructura de tallas e índices reproductivos de pez espada (Xiphias gladius en la zona de isla de Pascua

    Directory of Open Access Journals (Sweden)

    Rodrigo Vega

    2009-01-01

    Full Text Available The species composition, size distribution, and gonadal index (GI of swordfish (Xiphias gladius are reported from catches obtained by longliners in the zone of Easter Island in the southeastern Pacific. Five cruises were made during the summer season between 2001 and 2006 completing a total of 150 fishing sets. A total of 3,781 fish belonging to 24 species were registered, of which 17 were commercial and 6 were bycatch. Of the total, 44.1% were swordfish, 28.3%> sharks, 12.1% marlins, 8.4%> tunas and 7.1%o other teleosts. Amongst the sharks the most important species was the blue shark (Prionace glauca, 16.5%> followed by the brown shark (Carcharhinus spp., 6.9%>. Amongst the tunas and istiophorids, striped marlin (Tetrapturus audax, 8.0% and yellowfin tuna (Thunnus albacares, 4.9% were also important (≥ 4% in number. The number of units by species, the nominal yield in number and weight and the gutted average weight are reported in addition to size statistics. The population structure of swordfish was dominated by males and differences in the average length between sexes were not found. Individuals with high values of GI were observed during every survey, mainly during December-February which suggests a reproductive area for this species. The blue shark showed a predominance of males, and differences in the average length between sexes were observed, possibly due to a spatial and temporal segregation.Se reportan la composición de especies, estructura de talla, y el índice gonádico (IG de pez espada (Xiphias gladius, desde capturas obtenidas por embarcaciones palangreras en la zona de isla de Pascua en el Pacífico suroriental. En el periodo estival entre 2001 y 2006, se realizaron cinco cruceros completando un total de 150 lances de pesca. Se registró un total de 3.781 peces pertenecientes a 24 especies, de las cuales 17 fueron comerciales y seis incidentales. Del total, 44,1% fue pez espada, 28,3%> tiburones, 12,1% marlines, 8,4%o atunes

  12. The Kemp elimination in membrane mimetic reaction media. Probing catalytic properties of cationic vesicles formed from a double-tailed amphiphile and linear long-tailed alcohols or alkyl pyranosides

    NARCIS (Netherlands)

    Klijn, JE; Engberts, JBFN

    2004-01-01

    Vesicles formed from synthetic, double-tailed amphiphiles are often used as mimics for biological membranes. However, biological membranes are a complex mixture of various compounds. In the present paper we describe a first attempt to study the importance of additives on vesicular catalysis. The

  13. Comparative analysis of complete genome sequences of European subtype tick-borne encephalitis virus strains isolated from Ixodes persulcatus ticks, long-tailed ground squirrel (Spermophilus undulatus), and human blood in the Asian part of Russia

    Czech Academy of Sciences Publication Activity Database

    Demina, T. V.; Tkachev, S. E.; Kozlova, I. V.; Doroshchenko, E. K.; Lisak, O. V.; Suntsova, O. V.; Verkhozina, M. M.; Dzhioev, Y. P.; Paramonov, A. I.; Tikunov, A. Y.; Tikunova, N. V.; Zlobin, V. I.; Růžek, Daniel

    2017-01-01

    Roč. 8, č. 4 (2017), s. 547-553 ISSN 1877-959X Institutional support: RVO:60077344 Keywords : TBEV * complete genome * European subtype * Western Siberia * Eastern Siberia * nucleotide * Amino acid sequence Subject RIV: FN - Epidemiology, Contagious Diseases ; Clinical Immunology OBOR OECD: Infectious Diseases Impact factor: 3.230, year: 2016

  14. La herencia en el glaucoma primario de ángulo abierto en la provincia Las Tunas Heredity in primary open-angle glaucoma in the province of Las Tunas

    Directory of Open Access Journals (Sweden)

    Yunia H Labrada Rodríguez

    2000-12-01

    Full Text Available Se presentaron los resultados de un estudio realizado en 72 pacientes con glaucoma primario de ángulo abierto y sus familiares. Las familias se agruparon según patrón de herencia y se relacionó el tipo de herencia con antecedentes patológicos personales, edad y sexo. Se obtuvo el 50 % de familias con patrón de herencia no definido, el 25 % con patrón autosómico dominante y el 25 % con patrón autosómico recesivoResults of a study carried out in 72 patients presenting with open-angle primary glaucoma and their relatives are presented. Families were grouped according to inheritance pattern, and type of inheritance with personal pathologic backgrounds, age and sex were related. There was 50 % of families with indefinite inheritance pattern, 25 % with autosomal dominant pattern, and 25 % with autosomal recessive

  15. SYSTEM OF ACTIONS TO PERFECT THE WORK OF THE GROUPS OF COMMUNITY-WORK IN THE MUNICIPALITY OF LAS TUNAS / SISTEMA DE ACCIONES PARA PERFECCIONAR LA LABOR DE LOS GRUPOS DE TRABAJO COMUNITARIO EN EL MUNICIPIO DE LAS TUNAS

    Directory of Open Access Journals (Sweden)

    Betsy Rodríguez Serrano

    2012-09-01

    Full Text Available Cuba has a series of objectives that make it different to world level, it confers him great importance to the development of the communities, because this it rebounds directly in the development of the country, numerous they have been the programs that the Revolution has been traced to improve the way of life of the society, to leave its interests and necessities. It respects the multiplicity of traditions and characteristic cultural originated by the history. It is seated in the ethical values of the hard-working class, in particular, those of contribution and mutual benefit. They keep in mind that the community is constituted by people, individuals to which the community action should arrive, I don't eat something impersonal or distant, but in a continuous and personal way. The coordination and integration of the activities, the efforts and resources of the different organisms, organizations and institutions, in achieving the most important objectives for the town, it allows a bigger coherence in their actions that will contribute to strengthen the results, on the base of the increment of the effectiveness.

  16. MARICULTURE ON CROATIAN ISLANDS

    Directory of Open Access Journals (Sweden)

    Gordana Šarušić

    2000-09-01

    Full Text Available The first attempts of intensive mariculture in Croatia commenced at the very beginning of 1980’s. The mid-eighties brought an expansion of mariculture production, which has been continuously increasing. A few different marine organisms are intensively cultured - both fish and shellfish. Among them commercially most important and highly valued species are sea bass Dicentrarchus labrax and sea bream Sparus aurata. Mussel Mytilus galloprovincialis and oyster Ostrea edulis are the most important shellfish. Fish species such as dentex Dentex dentex, red sea bream Pagrus major and sheepshead bream Puntazzo puntazzo are reared too, but in a rather small quantities. Only recently the rearing, on-growing- of bluefin tuna Thunnus thynnus started in Croatia. The juveniles (70% are reared in a Croatian hatcheries, and 30% has to be imported mainly from Italy and France, due to a higher demand for this kind of culture among the small growers. Croatian part of Adriatic sea possesses a number of geomorfologicaly suitable sites and meteorological conditions which determined the choice - type - of intensive culture. All fish species are reared in a floating cages. The choice of cages i. e. semi off-shore or floating frames, size, rearing volume and design depend on the investors personal preference. The annual turnouf of a market size bass was about 600t and 300t bream in 1996., by 10 island farms which is 70% of total production in Croatia. Including other cultured fish species last year production was up to 1000t, and it™s being estimated to be about 1300t in the following year. The shellfish production on the islands is usually individual attempt of farmers, producing minor quantities mostly in polyculture. This production has bigger potential but it’s limited owing to the EU quality control regulations which do not allow the export, and by domestic market which has drastically decreased due to the collapse of tourism during the recent war. Almost 80

  17. Analysis of biogenic carbonates by inductively coupled plasma-mass spectrometry (ICP-MS). Flow injection on-line solid-phase preconcentration for trace element determination in fish otoliths.

    Science.gov (United States)

    Arslan, Z; Paulson, A J

    2002-04-01

    The aragonite deposits within the ear bones (otoliths) of teleost fish retain a chemical signal reflecting the life history of fish (similar to rings of trees) and the nature of fish habitats. Otoliths dissolved in acid solutions contain high concentrations of calcium and a variety of proteins. Elimination of matrix salts and organic interferences during preconcentration is essential for accurate determination of trace elements in otolith solutions by inductively coupled plasma-quadrupole mass spectrometry. An iminodiacetate-based chelating resin (Toyopearl AF-Chelate 650 M) has been used for on-line preconcentration and matrix separation for the determination of 31 transition and rare elements. Successful preconcentration of the elements was achieved at pH 5 by on-line buffering, except Mn which required pH 8.8. Sample solutions were loaded on to the column for 1 min at 3.2 mL min(-1), and then eluted directly into the mass spectrometer with 4% v/v nitric acid. This procedure enabled up to 25-fold preconcentration with successful removal of the calcium matrix. The effect of heat-assisted oxidation with concentrated nitric acid was investigated to eliminate the organic matrix. It was found that heating to dryness after dissolution and further mineralization with the acid significantly improved the retention of the transition elements. The method was validated by analysis of a certified reference material produced from saggittal otoliths of emperor snapper ( Lutjanus sebae), and then applied to the determination of trace metal concentrations in juvenile bluefin tuna ( Thunnus thynnus) from the Western Pacific Ocean.

  18. Seasonal-dial shifts of ichthyoplankton assemblages and plastic debris around an Equatorial Atlantic archipelago

    Directory of Open Access Journals (Sweden)

    André Araújo Lima

    2016-08-01

    Full Text Available Seasonality was a stronger influence in the ichthyoplankton assemblages around the Saint Peter and Saint Paul Archipelago (SPSPA than distance from the islands. Plastic debris were ubiquitous and although it presented diel trends, no other spatiotemporal patterns was showed. Larval Oxyporhamphus micropterus was the most important taxa (29.37% of the total catch, followed by Ceratoscopelus warmingii and Entomacrodus vomerianus. Exocoetidae eggs represented 41.01%. Mesopelagic fish larvae dominated the community. Myctophidae had the highest species richness (15. Four larval fish assemblages occured: (1 nighttime demersal/bathydemersal (Anguillidae, Congridae; (2 daytime mesopelagic/bathypelagic/epipelagic (Myctophidae, Cyclothone acclinidens; (3 daytime epipelagic (Exocoetidae, Coryphaena hippurus, Thunnus albacares and (4 nighttime reef and demersal (Blennidae, Pomacentridae, Lutjanidae. The dry season (lower temperature, higher chlorophyll a and higher SW wind velocity influenced the first two assemblages. The rainy season (higher temperatures and lower NW wind velocity influenced the last two. Nighttime abundance of dominant species in the rainy season suggests diel vertical migration nearshore. Plastics were 2.12 times more abundant than the most abundant fish larvae. Comparable amounts of larvae and plastics in the water column increase the chances of interaction between these two compartments and might disturb the local marine food web and promote the transfer of microplastic from one habitat to another, especially when smaller taxa contaminated by ingested fragments are preyed by migratory animals such as marine birds and tuna. A study around the area concluded that at least a part of the plastic debris can have local source due to fishing activities. Small-scale oceanographic mechanisms such as the interaction between the topography and currents (SEC and EUC seem to be responsible for the retention of fish eggs, fish larvae and plastics

  19. Inferring the nature of anthropogenic threats from long-term abundance records.

    Science.gov (United States)

    Shoemaker, Kevin T; Akçakaya, H Resit

    2015-02-01

    Diagnosing the processes that threaten species persistence is critical for recovery planning and risk forecasting. Dominant threats are typically inferred by experts on the basis of a patchwork of informal methods. Transparent, quantitative diagnostic tools would contribute much-needed consistency, objectivity, and rigor to the process of diagnosing anthropogenic threats. Long-term census records, available for an increasingly large and diverse set of taxa, may exhibit characteristic signatures of specific threatening processes and thereby provide information for threat diagnosis. We developed a flexible Bayesian framework for diagnosing threats on the basis of long-term census records and diverse ancillary sources of information. We tested this framework with simulated data from artificial populations subjected to varying degrees of exploitation and habitat loss and several real-world abundance time series for which threatening processes are relatively well understood: bluefin tuna (Thunnus maccoyii) and Atlantic cod (Gadus morhua) (exploitation) and Red Grouse (Lagopus lagopus scotica) and Eurasian Skylark (Alauda arvensis) (habitat loss). Our method correctly identified the process driving population decline for over 90% of time series simulated under moderate to severe threat scenarios. Successful identification of threats approached 100% for severe exploitation and habitat loss scenarios. Our method identified threats less successfully when threatening processes were weak and when populations were simultaneously affected by multiple threats. Our method selected the presumed true threat model for all real-world case studies, although results were somewhat ambiguous in the case of the Eurasian Skylark. In the latter case, incorporation of an ancillary source of information (records of land-use change) increased the weight assigned to the presumed true model from 70% to 92%, illustrating the value of the proposed framework in bringing diverse sources of

  20. A piezo motor based on a new principle with high output force, rigidity and integrity: The Tuna Drive

    Science.gov (United States)

    Liu, Xiaolong; Lu, Qingyou

    2012-11-01

    We present a linear piezoelectric motor as simple as one piezoelectric scanner tube (PST) spring-clamping a central shaft at both ends with roughly equal clamping forces. The clamping points are aligned with ±X electrodes at one end and ±Y electrodes at the other end. Thus, the ±X (or ±Y) push-pull motions of the PST can cause the push-pull motions of the clamping points on the shaft (called push-pull rubbing), which reduces the total dynamic friction force at one (or the other) end of the PST. This new piezo motor advances one step by fast push-pull rubbing at one end while slowly retracting the PST followed by fast push-pull rubbing at the other end while slowly elongating the PST. Apart from the obvious advantages of simplicity, rigidity, integrity, etc., we will also show that this motor can produce a large output force, which we believe is because of the huge drop of the clamping friction force when the push-pull rubbing occurs.