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Sample records for farfantepenaeus paulensis perez-farfante

  1. Determination of the grow-out density of Farfantepenaeus paulensis (Perez-Farfante, 1967 shrimp juveniles with a view to providing alternative culture structures (pens in Ibiraquera Lagoon, Imbituba, Santa Catarina

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    Luis Vinatea

    2007-09-01

    Full Text Available Ibiraquera Lagoon, which is located between the municipalities of Garopaba and Imbituba, both in Santa Catarina, a state of southern Brazil, was set up in the last decade as part of a Program for the Restocking of Coastal Lagoons. This program obtained successful results for several years. However, nowadays the productivity of this natural environment has probably been reduced because of its overfishing, specially of the pink shrimp Farfantepenaeus paulensis (Perez-Farfante, 1967, and above all the effect of anthropogenic factors. Such facts have led some researchers to question the viability of successfully restocking the lagoon, since eutrophication would be accelerated by several other factors. Thus, to discover whether the young of F. paulensis could grow and survive feeding only on the natural food of the lagoon´s environment, and whether they were able to tolerate the quality of the water, an experiment was designed to calculate how the lagoon would support future restocking. To this end a farming process was set up which lasted 93 days, testing 3 different densities: 1, 1.5, and 2 shrimps/m2 in standard circular pens of 50 m2. Results after the farming period regarding growth the physico-chemical parameters indicated values in the expected range that fell within the tolerance limits for the survival and satisfactory development of the young of F. paulensis, since significant differences in the daily fluctuations of the dissolved oxygen (OD were not found. Results on the growth were also found to have similar values to those found by other researchers in the dos Patos Lagoon, in the neighboring state of Rio Grande do Sul. Treatment with a density of 1 shrimp/m2 was significantly different (p<0.05 in relation to the other two treatments with densities of 1.5 and 2, both of which had very similar values. However, the final results of shrimp survival and polychaeta biomass throughout the experiment did not present significant differences (p

  2. O impacto da pesca do camarão-rosa Farfantepenaeus paulensis (Perez-Farfante (Decapoda, Penaeidae nas assembléias de peixes e siris do Parque Nacional da Lagoa do Peixe, Rio Grande do Sul, Brasil The impact of the Pink Shrimp Farfantepenaeus paulensis (Perez-Farfante (Decapoda, Penaeidae fishery on the fish and crab assemblages of Lagoa do Peixe National Park, Rio Grande do Sul, Brazil

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    Daniel Loebmann

    2006-12-01

    Full Text Available Este trabalho avaliou do impacto da pesca do camarão-rosa Farfantepenaeus paulensis (Perez-Farfante, 1967 sobre a assembléia de peixes e crustáceos do Parque Nacional da Lagoa do Peixe. Constatou-se que, em média, a composição nas capturas da pesca do camarão-rosa, com a arte de pesca aviãozinho, é semelhantes àquelas descrita em para outros estuários do Rio Grande do Sul, quando considerada apenas a proporção das grandes categorias analisadas (espécie alvo - camarão-rosa 53%: captura acessória 24%: rejeito 23%. A composição da fauna acompanhante (captura acessória + rejeito apresente diferenças pronunciadas ao longo do gradiente salino da laguna. No geral, ao nível específico, as espécies de peixes capturadas com maior intensidade - Brevoortia pectinata (Jenyns, 1842, Micropogonias furnieri (Desmarest, 1823 e Jenynsia multidentata (Jenyns, 1842 - diferem daquelas capturadas em outros estuários do Rio Grande do Sul, onde, além de M. furnieri, os bagres Genidens barbus (Lacepède, 1803 e Genidens genidens (Cuvier, 1829 dominam nas capturas. As estimativas do potencial de impacto das capturas acessório e do rejeito apresentaram valores, do ponto de vista pesqueiro, bastantes satisfatórios, quando comparados com outras artes de pesca do camarão, o que sugere que a decisão de proibir a pesca no Parque Nacional da Lagoa do Peixe não deve ser baseada no impacto da pesca do camarão-rosa sobre a fauna acompanhante, mas sim na atividade pesqueira em si, uma vez que a legislação Brasileira vigente proíbe a pesca dentro de Parques Nacionais.This work evaluates the impact of the pink shrimp Farfantepenaeus paulensis (Perez-Farfante, 1967 fishery on fish and crab assemblages of Lagoa do Peixe National Park, Brazil. We observed that composition of catches is similar to shrimp fisheries using fyke-net at others estuaries of Rio Grande do Sul State: pink shrimp (53%, accessory catches (24% and bycatch (23%. However, fishery

  3. Proteases digestivas do hepatopâncreas dos camarões marinhos Farfantepenaeus subtilis e Farfantepenaeus paulensis

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    de Souza Buarque, Diego

    2008-01-01

    Os camarões Farfantepenaeus subtilis e Farfantepenaeus paulensis são espécies nativas e aparecem como uma alternativa ao cultivo do Litopenaeus vannamei, que hoje corresponde a mais de 90% do cultivo de camarões marinhos da região nordeste. Proteases do hepatopâncreas de F. subtilis jovens e adultos e F. paulensis jovens foram estudadas quanto aos seguintes aspectos: inibição enzimática, pH e temperatura ótima, estabilidade térmica, eletroforese e zimogramas. No extrato bruto d...

  4. Nursery performance of the pink shrimp Farfantepenaeus paulensis (Crustacea: Decapoda: Penaeidae postlarvae in different salinities

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    Rafael F. Costa

    2010-06-01

    Full Text Available Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967 postlarvae acclimated from a salinity of 30‰ to higher (35‰ or lower (16, 22 and 29‰ salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29‰. RNA:DNA ratio indicated reduced growth potential at a salinity of 35‰. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an alternative species for aquaculture in subtropical areas.

  5. Population genetic structure of Brazilian shrimp species (Farfantepenaeus sp., F. brasiliensis, F. paulensis and Litopenaeus schmitti: Decapoda: Penaeidae

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    Jaqueline Gusmão

    2005-03-01

    Full Text Available Penaeid shrimps are important resources for worldwide fisheries and aquaculture. In the Southwest Atlantic, Farfantepenaeus brasiliensis, F. paulensis, F. subtilis, Farfantepenaeus sp. and Litopenaeus schmitti are among the most important commercially exploited species. Despite their high commercial value, there is little information available on the different aspects of their biology or genetics and almost no data on their stock structure. We used allozymes to estimate variability levels and population genetic structure of F. brasiliensis, F. paulensis, L. schmitti and the recently detected species Farfantepenaeus sp. along as much as 4,000 km of Brazilian coastline. No population heterogeneity was detected in F. brasiliensis or L. schmitti along the studied area. In contrast, F ST values found for Farfantepenaeus sp. and F. paulensis indicate that the populations of those two species are genetically structured, comprising different fishery stocks. The largest genetic differences in F. paulensis were found between Lagoa dos Patos (South and the two populations from Southeast Brazil. In Farfantepenaeus sp., significant differences were detected between the population from Recife and those from Fortaleza and Ilhéus.

  6. Genetic homogeneity in the commercial pink shrimp Farfantepenaeus paulensis revealed by COI barcoding gene

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    Teodoro, S. S. A.; Terossi, M.; Costa, R. C.; Mantelatto, F. L.

    2015-12-01

    The pink shrimp Farfantepenaeus paulensis is one of the most commercially exploited species in Brazil's South and Southeastern regions. Specific information about the status of its genetic variation is necessary to promote more effective management procedures. The genetic variation of the population of F. paulensis was investigated in five localities along southern and southeastern coast of Brazil. Sampling was performed with a commercial fishing boat. Total genomic DNA was extracted from abdominal muscle tissues and was used to DNA amplification by PCR. The COI gene was used as a DNA barcoding marker. The 570 bp COI gene sequences were obtained from all 45 individuals. The haplotype network showed no genetic variability among the population stocks, which was confirmed by Molecular Variance Analysis. The final alignment showed that inside species there is haplotype sharing among the sampled localities, since one haplotype is shared by 38 individuals belonging to all the five sampled regions, with no biogeographic pattern. This result is reasonable since there are no geographical barriers or habitat disjunction that might serve as a barrier to gene flow among the sampled localities. Possible reasons and consequences of the genetic homogeneity found are discussed. The results complement ecological studies concerning the offseason: since it is a single stock, the same protection strategy can be applied. However, the genetic homogeneity found in this study combined with the intensive fishery effort and the species biology can result in severe consequences for the F. paulensis.

  7. Molecular characterization of penaeidins from two Atlantic Brazilian shrimp species, Farfantepenaeus paulensis and Litopenaeus schmitti.

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    Barracco, Margherita Anna; de Lorgeril, Julien; Gueguen, Yannick; Bachère, Evelyne

    2005-09-01

    We report here the molecular cloning of new members of the penaeidin family from two Atlantic penaeids from Brazil, Litopenaeus schmitti and Farfantepenaeus paulensis. The presence of penaeidins in the granular hemocytes of both shrimps was first evidenced by immunofluorescence, using polyclonal antibodies raised against L. vannamei penaeidin Litvan PEN3-1. cDNAs from the hemocytes of both Brazilian species were obtained by reverse transcription and the sequences encoding penaeidins were amplified by PCR, using primers based on penaeidin consensus sequences. Five penaeidin clones were obtained. According to the international penaeidin classification (PenBase, http://www.penbase.immunaqua.com), the deduced amino acid sequences of two clones from L. schmitti and two from F. paulensis belong to the PEN2 subgroup and one clone from L. schmitti to the PEN4 subgroup of penaeidins. Surprisingly, no penaeidin from the PEN3 subgroup was obtained in both shrimp species, even though this subgroup appears to be the most commonly expressed in the hemocytes of penaeids.

  8. Growth and feed utilization of the shrimp Farfantepenaeus paulensis fed diets containing different marine protein sources Crescimento e eficiência alimentar do camarão Farfantepenaeus paulensis alimentado com dietas contendo diferentes fontes protéicas marinhas

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    Ronaldo Olivera Cavalli

    2004-06-01

    Full Text Available Five isonitrogenous and isoenergetic diets containing different protein sources (fish, squid and mussel meals and their combinations at the proportions of 40, 30 and 30% or 60, 20 and 20% were fed for 28 days to Farfantepenaeus paulensis. Growth performance and feed utilization of shrimp fed the fish meal-based diet was comparatively inferior to those fed other protein sources or their combinations. This indicates that fish meal may not be the best protein source for F. paulensis. Feeds containing a mixture of protein sources are better utilized by F. paulensis and therefore result in significantly higher growth than those containing a single protein source.Cinco dietas iso-protéicas e iso-energéticas contendo diferentes fontes de proteína marinhas (farinhas de peixe, lula e mexilhão e suas misturas nas proporções de 40, 30 e 30% ou 60, 20 e 20% foram oferecidas durante 28 dias para o camarão Farfantepenaeus paulensis. O crescimento e a taxa de conversão alimentar dos camarões arraçoados com a dieta a base de farinha de peixe tendeu a ser inferior àqueles alimentados com as outras fontes de proteína e/ou suas combinações. Estes resultados indicam que a farinha de peixe pode não ser a melhor fonte protéica para F. paulensis. Dietas contendo uma mistura de fontes protéicas foram mais bem utilizadas por F. paulensis e, portanto, resultaram em taxas de crescimento superiores àquelas contendo uma única fonte de proteína.

  9. The effect of temperature, salinity and nitrogen products on food consumption of pink shrimp Farfantepenaeus paulensis

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    Wilson Wasielesky Jr.

    2003-01-01

    Full Text Available Studies were carried out to investigate the effect of temperature, salinity, ammonia, nitrite and nitrate on food consumption of pink shrimp Farfantepenaeus paulensis. Juveniles (0.2 - 0.4 g were acclimated for 15 days in seawater with different temperatures, salinities and concentrations of ammonia, nitrite and nitrate. After the acclimation period, 20 shrimps per treatment were individualized in order to have their ration intake analyzed through the amount of ration offered and left over within a 24-hour period. Mean food consumption presented significant alterations (P0.05. According to the results obtained, temperature and nitrite affected F. paulensis food consumption. On the other hand, variables as salinity, ammonia and nitrate did not affect shrimp appetite. However, the possibility of this to happen over long periods, prejudicing the species culture in captivity, reinforced the necessity of regular water quality management.Nos cultivos de organismos aquáticos, a manutenção da qualidade da água é fundamental para o sucesso da atividade, tendo em vista que variações nos parâmetros físico-químicos implicam em alterações metabólicas. O consumo de alimento por parte dos camarões pode ser afetado por estas variações, o que interfere nas taxas de crescimento e conseqüentemente na biomassa final produzida. O objetivo deste trabalho foi investigar o efeito da temperatura, salinidade, amônia, nitrito e nitrato sobre o consumo alimentar do camarão-rosa Farfantepenaeus paulensis. Desta forma, juvenis (0,2-0,4 g foram aclimatados por 15 dias em água do mar com diferentes temperaturas, salinidades, concentrações de amônia, nitrito e nitrato. Após o período de aclimatação, 20 camarões de cada tratamento foram individualmente analisados para observar a relação entre a quantidade de alimento oferecido e a quantidade de alimento ingerido, em um período de 24 horas. O consumo médio apresentou alterações significativas (p0

  10. Growth and mortalities of the pink-shrimp Farfantepenaeus brasiliensis Latreille, 1970 and F. paulensis Pérez-Farfante 1967 in Southeast Brazil.

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    Leite, N O; Petrere, M

    2006-05-01

    From July, 1999 until July, 2001 data from the pink-shrimp Farfantepenaeus brasiliensis Latreille, 1970 and F. paulensis Pérez-Farfante, 1967 fishery were collected from trawling by the fishing fleet based in Santos/Guarujá-SP. Growth and mortalities of these species were studied. F. brasiliensis and F. paulensis have longevity of 2 years and growth estimates of L Infinity = 29.0 cm and k = 1.24 year-1 for F. brasiliensis and L Infinity = 27.5 cm and k = 1.34 year-1 for F. paulensis. Females reach bigger lengths than males in both species. Natural mortalities (M) were 1.80 and 1.90 year-1 and fishing mortalities (F) were 4.7 and 6.8 year-1 for F. brasiliensis and F. paulensis, respectively. Survival rates are S = 0.15% and 0.02% for F. brasiliensis and F. paulensis, respectively, which are usually low values for shrimps.

  11. Análise comparativa da criação dos camarões-rosa Farfantepenaeus brasiliensis e FarfantePenaeus paulensis criados em gaiolas em ambiente estuarino Comparative analysis of pink shrimp Farfantepenaeus brasiliensis and FarfantePenaeus paulensis reared in estuarine cage culture system

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    Diogo Luiz de Alcantara Lopes

    2009-08-01

    Full Text Available A análise da criação de Farfantepenaeus brasiliensis e Farfantepenaeus paulensis em gaiolas, na Lagoa dos Patos, Rio Grande do Sul (RS, foi realizada a partir de juvenis produzidos em cativeiro com peso médio inicial de aproximadamente 1,2g. O experimento foi realizado em seis gaiolas (três gaiolas/tratamento, com abertura de malha de 5mm, área de fundo de 4m² durante 65 dias. A distribuição dos indivíduos nos tratamentos (F. brasiliensis e F. paulensis foi aleatória, mantendo-se a densidade de 20 camarões m-2 nas unidades experimentais. A cada 15 dias foram realizadas biometrias para ajuste da quantidade de ração fornecida e avaliação do crescimento dos camarões. Ao final do experimento, foi realizada a biometria total dos camarões para avaliação da sobrevivência. Não houve diferença significativa entre a sobrevivência de F. brasiliensis (94,17 ± 9,04 e F. paulensis (98,50±0,71. O peso médio final foi significativamente maior para o F. brasiliensis (7,98± 0,94g; porém, não foram observadas diferenças significativas na produção de biomassa (127,81±17,93 e 126,65±1,74g m-2 e conversão alimentar aparente (1,39±0,27 e 1,57±0,09 de F. brasiliensis e F. paulensis, respectivamente. Os resultados indicam que F. brasiliensis apresenta potencial para produção em estruturas alternativas e incentivam que novas pesquisas sejam realizadas para o desenvolvimento de um pacote tecnológico de produção dessas espécies.The cage culture of Farfantepenaeus brasiliensis and Farfantepenaeus paulensis was analyzed in the Patos Lagoon estuary using juveniles produced in captivity. Mean initial weight of the juveniles was approximately 1.2g. The experiment was conducted in 6 cages (3 per treatment, with mesh size of 5mm and bottom area of 4m², during 65 days. The individuals were randomly distributed into two treatments (F. brasiliensis e F. paulensis, keeping the stocking density of 20 shrimps m-2 in the experimental units

  12. Growth and survival of pink shrimp (Farfantepenaeus paulensis postlarve in cages and pen enclosures Crescimento e sobrevivência de pós-larvas de camarão-rosa (Farfantepenaeus paulensis em gaiolas e cercados

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    Luciano Jensen Vaz

    2004-06-01

    Full Text Available Technology for the culture of the pink shrimp Farfantepenaeus paulensis in low-cost cages and pen enclosures was developed together with artisanal fishermen of the Patos Lagoon estuary, southern Brazil. Although the production of postlarvae (PL under laboratory conditions is well documented, survival and growth during the nursery phase cages and pen enclosures in the nature has not yet been analyzed. Therefore, the present study compared survival and growth of F. paulensis postlarvae reared either in cages or pens. Six cages (2.0 ´ 2.0 ´ 1.4 m of PVC-coated polyester with a mesh size of 1.5 mm were stocked with 800 PL26 each. To assess the effect of the substrate, a 10 cm layer of sand was added to three of these cages to simulate a pen enclosure. No difference in the mean survival rate between cages (92.2% and pens (88.7% was found (P > 0.05. However, final weight of shrimp reared in pens (1.05 ± 0.05 g was higher than those kept in cages (0.88 ± 0.12 g. The nursery phase of F. paulensis in cages and pens did not affect survival. Nevertheless, because of the higher growth rate of shrimp grown in pen enclosures, this kind of structure should be preferentially used in nursery rearing of this species.Um pacote tecnológico para o cultivo do camarão-rosa em estruturas alternativas de baixo custo, gaiolas e cercados, vem sendo aplicado em conjunto com pescadores artesanais do estuário da Lagoa dos Patos, no extremo sul do Brasil. Embora a tecnologia para o cultivo intensivo de pós-larvas (PL em laboratório já esteja bem documentada, informações referentes à sobrevivência e crescimento desses organismos na fase de berçário ainda são escassas para cercados e gaiolas no ambiente natural. Em virtude destes fatos, o objetivo do trabalho foi comparar o crescimento e a sobrevivência de pós-larvas de F. paulensis durante a fase de berçário em gaiolas e cercados no ambiente. Para o desenvolvimento do trabalho, foram utilizadas seis

  13. Distribution pattern of juveniles of the pink shrimps Farfantepenaeus brasiliensis (Latreille, 1817 and F. paulensis (Pérez-Farfante, 1967 on the southeastern Brazilian coast

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    Rogério Caetano da Costa

    Full Text Available Abstract The spatio-temporal distribution of juveniles of the pink shrimps Farfantepenaeus brasiliensis (Latreille, 1817 and Farfantepenaeus paulensis (Pérez-Farfante, 1967 in the Ubatuba region (SP was investigated. Sampling was performed in the bays of Ubatumirim (UBM, Ubatuba (UBA and Mar Virado (MV. A total of 2,018 F. brasiliensis and F. paulensis were collected. The largest catch of juveniles of both species occurred in UBA (N = 867, followed by UBM (N = 729 and MV (N= 422. The bottom sediment in MV had the highest silt and clay content, which explains the negative correlation of the substrate with the abundance of both species. Temperature was positively correlated with the abundance of both species. Juveniles were highly abundant in shallower areas in the summer of 1998. The high rainfall in this El Niño period may have lowered the salinity in estuarine waters and led the shrimps to move to coastal areas in search of higher salinities such as in bays. With this unusually early reduction in salinity, individuals migrated to the bay before the closed season began and thus became more exposed to fishing. We confirmed that monitoring environmental variations, especially in El Niño years, is essential for understanding the distribution patterns of juveniles of both species.

  14. Habitat selection of the pink shrimp Farfantepenaeus paulensis and the blue crab Callinectes sapidus in an estuary in southern Brazil: influence of salinity and submerged seagrass meadows

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    Vinicius Mendes Ruas

    Full Text Available This study was conducted in two estuarine inlets (Saco da Mangueira and Saco do Arraial at the Patos Lagoon estuary, southern Brazil. The changes in relative abundance and size of post-larvae and juvenile shrimp Farfantepenaeus paulensis and juvenile blue crab Callinectes sapidus were compared, considering the influence of salinity and the presence of submerged seagrass meadows. The analyses were performed using generalized linear models (GLM for abundance variations and ANOVA for variations on the size of individuals. The pink shrimp was more abundant at Saco da Mangueira, in seagrass meadows and areas of higher salinity. The blue crab was more abundant at Saco do Arraial and in lower levels of salinity. The importance of submerged vegetation for the blue crab lies in a preference of smaller crabs of the species for the seagrass meadows. It has been shown that these species choose different habitats in the estuary, and both the salinity and the presence of submerged seagrass meadows influence the selection of habitat.

  15. Catch variability and growth of pink shrimp (Farfantepenaeus paulensis in two coastal lagoons of uruguay and their relationship with ENSO events

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    Orlando Santana

    2015-09-01

    Full Text Available AbstractThe pink shrimp Farfantepenaeus paulensis (Pérez Farfante, 1967 is distributed along the Atlantic Coast from Bahia (Brazil to Mar del Plata (Argentina. The larval stages enter the Uruguayan brackish water lagoons during late spring to summer associated with tidal currents of the Brazilian Current. In such environments the growth is accelerated and in early autumn the individuals attain commercial size, supporting important regional artisanal fisheries. The pink shrimp catches from 1988 to 2013 were analyzed and related to phenomena of climate variability in ENSO events and to the growth of the species. The total catch ranges from 0.7 to 162 tons. The variation in catches has a negative relationship with the varied climatic events caused by El Niño. Growth parameters yielding values of L ∞ = 177 mm (total carapace length and K = 1.48 for the period 2009-2013. These values differ slightly from those calculated for natural populations in southern Brazil, suggesting that the population is the same and thus implying the need for coordinated fisheries management between the two countries.

  16. Requerimientos de proteína y energía bruta en juveniles de camarón rosado Farfantepenaeus paulensis (Pérez-Farfante, 1967 sometidos a diferentes salinidades Gross protein and energy requirements for pink shrimp Farfantepenaeus paulensis (Pérez-Farfante, 1967 juvenile under different salinities

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    Roberto Ramos

    2011-11-01

    Full Text Available Se determinó el requerimiento de proteína (PB y energía bruta (EB y su relación óptima en dietas prácticas para juveniles de camarón rosado Farfantepenaeus paulensis en diferentes salinidades. Se sembraron camarones con peso promedio de 0,353 g en 54 estanques de PVC con densidad inicial de 40 ind m-2. El experimento fue factorial, con tres niveles de proteína bruta 24, 35 y 48%, tres salinidades 10, 20 y 30 psu y dos niveles de energía bruta 3200 y 4200 kcal kg-1 de dieta, con tres réplicas, en un período experimental de 25 días. Los resultados indicaron que la salinidad y la proteína tuvieron un efecto significativo (P 0,05 sobre la sobrevivencia, tasa de crecimiento específica y ganancia en peso. La respuesta de los camarones a las necesidades de proteína y energía bruta en las salinidades probadas fue diferente. En la salinidad de 10 psu los requerimientos fueron 35% PB y 4200 kcal kg-1 (83,3 mg PB kcal-1, mientras que en salinidades de 20 y 30 psu fueron 25% de PB y 3200 kcal kg-1 (75,0 mg PB kcal-1.The requirement of gross protein and energy and the optimal ratio of these in practical diets for pink shrimp (Farfantepenaeus paulensis juveniles in different salinities were determined. Shrimp with a mean initial weight of 0.353 g were stocked in 54 plastic tanks at initial densities of 40 ind m-2. The experiment was factorial, with three levels of gross protein (24, 35, 48%, three levels of salinities (10, 20, 30 psu, and two levels of gross energy (3200, 4200 kcal kg-1; the experiment lasted 25 days and considered three replicates. The results showed that salinity and protein had a significant effect (P < 0.05 on weight gain and the specific growth rate, but did not influence on survival. The energy had no significant effect on survival, growth rate, or weight gain. The response of the shrimp to the gross energy and protein level showed different requirements according to the different salinities tested. At salinity of 10 psu

  17. Desempenho de pós-larvas do camarão-rosa Farfantepenaeus paulensis alimentadas com diferentes frequências durante a fase de berçário = Performance of Farfantepenaeus paulensis shrimp postlarvae fed in different feeding frequencies during nursery rearing

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    Ronaldo Olivera Cavalli

    2008-07-01

    Full Text Available Este estudo avaliou os efeitos da frequência de arraçoamento na sobrevivência e crescimento do camarão-rosa Farfantepenaeus paulensis criado durante a fase de berçário primário. Uma dieta comercial foi oferecida até a saciedade aparente em um, dois, quatro ou seis refeições, e cada tratamento recebia diariamente a mesma quantidade. A sobrevivência não foi significativamente afetada, mas o peso final dos camarões foi superior com o aumento da frequência de arraçoamento. Algumas hipóteses podem explicar a vantagem emdividir o arraçoamento em várias refeições diárias: a diminuição das perdas de nutrientes por lixiviação, a menor atratividade da dieta exposta à água, a incapacidade dos camarões ingerirem maior quantidade de alimento ou a menor desintegração das partículasalimentares, o que dificultaria a manipulação e ingestão da dieta pelos camarões.This study assessed the effects of feeding frequency on the survival and growth of the shrimp Farfantepenaeus paulensis reared during the nursery phase. Shrimp from each treatment were fed the same dailyamount of a commercial shrimp diet, which was offered to apparent satiation in 1, 2, 4 or 6 meals. Although survival was not significantly affected, final shrimp weight increased significantly at higher feeding frequencies. The advantage of dividing feeding in more than one daily meal may be explained by one or more of the following factors: lower loss of nutrients by lixiviation; smaller disintegration of food particles (which may hinder manipulation by shrimp and hence ingestion; loss of appeal of the diets after a longexposure to water; and the inability of shrimp to ingest large amounts of feed due to their relatively small digestive system.

  18. Spatio-temporal variation of the pink shrimp Farfantepenaeus paulensis (Crustacea, Decapoda, Penaeidae associated to the seasonal overture of the sandbar in a subtropical lagoon Variação espaço-temporal do camarão rosa Farfantepenaeus paulensis (Crustacea, Decapoda, Penaeidae associado à abertura sazonal da barra de conexão com o mar em uma lagoa subtropical

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    Nicolle C Ferreira

    2009-12-01

    Full Text Available On the southern Brazilian coast, the penaeid pink shrimp Farfantepenaeus paulensis (Pérez-Farfante, 1967 is intensively captured by both artisanal and industrial fisheries. In the Ibiraquera Lagoon, artisanal fishing of juvenile stocks has declined sharply over the last 15 years. The traditional management methods used by fishermen are no longer sustainable due to conflicts with the demands of tourism and weak environmental and public agencies. The dynamics of the timing of the artificial opening and natural reformation of a sandbar across the mouth of the lagoon are regarded as a central socio-ecological problem. We evaluated the abundance and biomass variation of F. paulensis throughout the year and along a spatial gradient measured from the sandbar into the lagoon. We also explored the influence of opening the sandbar on the shrimp population. Samples were collected monthly from February 2004 to February 2005, using a 27 mm mesh cast net, in four different areas, with three sites being sampled per area. Small numbers of large shrimps were captured in the upper area, while greater biomass and abundance of small shrimps were observed near the sandbar, suggesting the role of the inner area as a refuge for growing. The highest records for biomass and abundance were recorded during warm months, regardless if the lagoon was open or closed by the sandbar. The Ibiraquera Lagoon could be more productive for fishermen if the sandbar opening was coincident to the period of natural post-larvae influx. Furthermore, coastal stocks could be improved by opening the sandbar again during summer in conjunction with fishing quotas.O camarão rosa Farfantepenaeus paulensis (Pérez-Farfante, 1967 é intensivamente capturado, tanto pela frota pesqueira industrial quanto artesanal na costa sul brasileira. Na Lagoa de Ibiraquera (SC, a captura artesanal de camarões tem diminuído gradativamente nos últimos 15 anos. Os métodos de gestão tradicionais utilizados

  19. Crescimento e fator de condição na fase juvenil de Farfantepenaeus brasiliensis (Latreille e F. paulensis (Pérez-Farfante (Crustacea, Decapoda, Penaeidae em uma lagoa costeira tropical do Rio de Janeiro, Brasil Growth and condition factor in the juvenile phase of Farfantepenaeus brasiliensis (Latreille and F. paulensis (Pérez-Farfante (Crustacea, Decapoda, Penaeidae in a tropical coastal lagoon of Rio de Janeiro, Brazil

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    Edélti Faria Albertoni

    2003-09-01

    Full Text Available The growth relations of the shrimps Farfantepenaeus brasiliensis (Latreille, 1817 and F. paulensis (Pérez-Farfante, 1967 were evaluated at Imboassica lagoon, Macaé, Rio de Janeiro State, between June 1995 and September 1997, in four periods after events of sandbar opening. This sandbar separated the lagoon from the Atlantic Ocean. Through the evaluation of the weight/length relationships for the two species, significant differences in each interval after the sandbar openings were observed, as much among males and females as among all individuals of the same species. The results indicated that both species presented negative allometric growth in most of the studied occasions. The frequency and abundance of the two species in the lagoon is linked to many factors, among them the season of the sandbar opening, the span of time in which the sandbar remains opened, and the presence of a reproductive stock of adults close to the area when the sandbar is open. Through the analysis of the relative condition factor (Kr, it was verified that usually the conditions inside the lagoon are favorable to the development of both species, with the exception of the occasions when the sandbar opening events happen quickly and close to each other, allowing to conclude that the sandbar openings have an influence on the growth rates and in the general status of the organisms.

  20. Efeito da densidade de estocagem sobre o biofilme e o desempenho de pós-larvas do camarão-rosa FarfantePenaeus paulensis cultivadas em gaiolas

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    Preto Artur de Lima

    2005-01-01

    Full Text Available O objetivo deste estudo foi analisar a influência da densidade de estocagem na sobrevivência e no crescimento de pós-larvas de F. paulensis cultivadas em gaiolas durante a fase de berçário. Além disso, foram identificados e quantificados os principais microrganismos presentes no biofilme formado nos substratos artificiais colocados dentro das gaiolas. Foram usadas gaiolas com 4 m² de fundo e com substratos artificiais, nas densidades de 100, 200, 300, 400 e 500PL25 m-2. O experimento durou 35 dias. Observou-se uma relação negativa entre o aumento da densidade de estocagem de camarões e a sobrevivência e o crescimento destes. Foi observada uma preferência pelo consumo de diatomáceas cêntricas. A viabilidade técnica do cultivo de F. paulensis em gaiolas foi confirmada. O cultivo de F. paulensis em gaiolas na fase de berçário pode ser feito em densidades de até 400PL m-2, sem maiores perdas em sua sobrevivência e seu crescimento.

  1. Abundance, breeding and food of the Little Blue Heron Egretta caerulea (Aves, Ardeidae in the Patos Lagoon estuary, a recently colonized area in southern Brazil

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    Dimas Gianuca

    2012-03-01

    Full Text Available We document the expansion of the breeding distribution of the Little Blue Heron Egretta caerulea (Linnaeus, 1758 to 850 km beyond its previous southern limit in South America. In addition we present data on abundance, breeding biology and food of the species in the Patos Lagoon estuary, the area which the species recently colonized. The maximum abundance recorded in the breeding colony and in a nocturnal roosting site was 53 and 49 individuals respectively. Nesting occurred from September to March. Birds nested in a mixed breeding colony together with about 3,000 breeding pairs of seven other species of Pelecaniformes, in a swampy forest near the margin of the estuary. Five nests were between 1.5 and 4.3 m from the ground, on the shrub Daphnopsis racemosa (Thymelaeaceae, on the trees Sebastiana brasiliensis (Euphorbiaceae and Mimosa bimucronata (Leguminosae, or on the bamboo Bambusa sp. (Poaceae. Four nests produced two fledglings each, while one nest was abandoned. Of 13 grouped samples of food regurgitated by five nestlings, Pink Shrimp Farfantepenaeus paulensis (Perez-Farfante, 1967 constituted 70% in mass, while total length of ingested fishes and shrimps varied mostly between 20 and 50 mm. Estuarine prey items represented 99% of the total food mass. The recent southward expansion of the breeding range of the Little Blue Heron in South America may be a response to climate warming of the Patos Lagoon estuary. Degradation of estuaries in the southwestern Atlantic may also be forcing the birds to breed in areas outside previous geographical range.

  2. Empleo del Polvo de Spirulina Platensis en la Alimentacion de Zoeas y Mysis de Litopenaeus schmitti (Perez-Farfante y Kensley, 1997)

    OpenAIRE

    Civera Cerecedo, R.; Villareal, H.; Gaxiola Cortes, G.; Jaime Ceballos, B.; García Galano, T.

    2004-01-01

    En los laboratorios de producción de postlarvas de camarón se suministra, en los estadios de protozoea y mysis, alimento vivo para garantizar buenos resultados en el cultivo sin embargo, el empleo de alimentos artificiales posibilita reducir la costosa dependencia de las algas y los quistes de Artemia ( Wouters et al, 2004). Aunque los resultados alcanzados con diferentes dietas artificiales en el cultivo larval son satisfactorios, aún existe gran preferencia por la utilización del a...

  3. Venomic and pharmacological activity of Acanthoscurria paulensis (Theraphosidae) spider venom.

    Science.gov (United States)

    Mourão, Caroline Barbosa F; Oliveira, Fagner Neves; e Carvalho, Andréa C; Arenas, Claudia J; Duque, Harry Morales; Gonçalves, Jacqueline C; Macêdo, Jéssica K A; Galante, Priscilla; Schwartz, Carlos A; Mortari, Márcia R; Almeida Santos, Maria de Fátima M; Schwartz, Elisabeth F

    2013-01-01

    In the present study we conducted proteomic and pharmacological characterizations of the venom extracted from the Brazilian tarantula Acanthoscurria paulensis, and evaluated the cardiotoxicity of its two main fractions. The molecular masses of the venom components were identified by mass spectrometry (MALDI-TOF-MS) after chromatographic separation (HPLC). The lethal dose (LD(50)) was determined in mice. Nociceptive behavior was evaluated by intradermal injection in mice and the edematogenic activity by the rat hind-paw assay. Cardiotoxic activity was evaluated on in situ frog heart and on isolated frog ventricle strip. From 60 chromatographic fractions, 97 distinct components were identified, with molecular masses between 601.4 and 21,932.3 Da. A trimodal molecular mass distribution was observed: 30% of the components within 500-1999 Da, 38% within 3500-5999 Da and 21% within 6500-7999 Da. The LD(50) in mice was 25.4 ± 2.4 μg/g and the effects observed were hypoactivity, anuria, constipation, dyspnea and prostration until death, which occurred at higher doses. Despite presenting a dose-dependent edematogenic activity in the rat hind-paw assay, the venom had no nociceptive activity in mice. Additionally, the venom induced a rapid blockage of electrical activity and subsequent diastolic arrest on in situ frog heart preparation, which was inhibited by pretreatment with atropine. In the electrically driven frog ventricle strip, the whole venom and its low molecular mass fraction, but not the proteic one, induced a negative inotropic effect that was also inhibited by atropine. These results suggest that despite low toxicity, A. paulensis venom can induce severe physiological disturbances in mice.

  4. CARACTERIZAÇÃO FUNCIONAL E NUTRICIONAL DE UM ISOLADO PROTÉICO OBTIDO A PARTIR DE RESÍDUOS DE CAMARÃO ROSA (Farfantepenaeus paulensis

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    P. G. COSTA

    2008-11-01

    Full Text Available

    Os resíduos da industrialização de camarão rosa em Rio Grande, sul do Brasil, geram problemas de poluição ambiental devido ao seu descarte próximo à Laguna dos Patos. Estes resíduos apresentam vários componentes de interesse: quitina, proteína e astaxantina. O objetivo do trabalho foi obter um isolado protéico a partir de resíduos da industrialização do camarão rosa e estudar suas propriedades funcionais e nutricionais. O isolado protéico apresentou 33,2% de solubilidade em pH alcalino e a capacidade de retenção de água apresentou maior percentual (1,9g H2O/ g proteína em pH ácido (2,0 e temperatura de 50ºC, capacidade de retenção de óleo de 0,9g óleo/ g proteína; capacidade de formação de espuma de 237,1% e estabilidade da espuma de 75,7%. O isolado protéico apresentou 89,0% de proteína (b.s. e coeficiente de digestibilidade "in vivo" de 82,5%. Os aminoácidos essenciais presentes em maior concentração foram leucina (5,9%, lisina (5,0% e isoleucina (3,8%, apresentando 1,9% de metionina, indicando potencial muito bom para utilização em formulações protéicas de alimentos.

  5. Characterization of a Strain of Fukuyoa paulensis (Dinophyceae) from the Western Mediterranean Sea.

    Science.gov (United States)

    Laza-Martínez, Aitor; David, Helena; Riobó, Pilar; Miguel, Irati; Orive, Emma

    2016-07-01

    A single cell of the dinoflagellate genus Fukuyoa was isolated from the island of Formentera (Balearic Islands, west Mediterranean Sea), cultured, and characterized by morphological and molecular methods and toxin analyses. This is the first report of the Gambierdiscus lineage (genera Fukuyoa and Gambierdiscus) from the western Mediterranean Sea, which is cooler than its eastern basin. Molecular analyses revealed that the Mediterranean strain belongs to F. paulensis and that it bears LSU rDNA sequences identical to New Zealand, Australian, and Brazilian strains. It also shared an identical sequence of the more variable ITS-rDNA with the Brazilian strain. Toxin analyses showed the presence of maitotoxin, 54-deoxyCTX1B, and gambieric acid A. This is the first observation of the two latter compounds in a Fukuyoa strain. Therefore, both Gambierdiscus and Fukuyoa should be considered when as contributing to ciguatera fish poisoning. Different strains of Fukuyoa form a complex of morphologically cryptic lineages where F. paulensis stands as the most distantly related nominal species. The comparison of the ITS2 secondary structures revealed the absence of CBCs among strains. The study of the morphological and molecular traits depicted an unresolved taxonomic scenario impacted by the low strains sampling.

  6. Maturity Stages of Pink Shrimp Farfantepenaeus notialis (Penaeidae in the Colombian Caribbean

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    Daniel Giovanny Pérez Ferro

    2014-02-01

    Full Text Available The pink shrimp Farfantepenaeus notialis is one resource of great socioeconomic importance in the Caribbean region. However, this species has been overexploited in the last decades and there is a lack of biological and fishery information. For such reason, the objective of the present study is to determine and characterize the maturity stages a macroscopic and microscopic level of the pink shrimp (F. notialis as input for its management. The samples were taking from June of 2012 and May 2013, on boardshrimp commercial vessels in the Colombian Caribbean. The females of F. notialiswere identified and preserved for the histologic analysis and some gonads were fixed. Data of size, weight and sex were taken. The gonadal stages were determined from the morphology and coloration of gonad and to microscopic determination were carried out histologic cut from samples of thirty gonads from all stages. A total of 3019 females were obtained from F. notialis, to which five stages of gonadal development  ESTADIOS DE MADUREZ DEL CAMARÓN ROSADO Farfantepenaeus notialis (PENAEIDAE EN EL CARIBE COLOMBIANO 

  7. Estudo populacional do camarão-rosa Penaeus Paulensis pérez farfante (natantia, penaeidae) na Lagoa da Conceiçáo, Santa Catarina, Brasil Populational study of the pink-shrimp Penaeus Paulensis pérez farfante (natantia, penaeidae) in the Conceição Lake, Florianópolis, Santa Catarina, Brazil

    OpenAIRE

    Joaquim Olinto Branco; José Roberto Verani

    1998-01-01

    In the time period between May/92 to April/93, 2693 (1243 males and 1450 females) specimens of Penaeus paulensis Pérez Farfante, 1967 were collected. The shrimps were captured by night using a hand net in äreas between 30 to 150 cm deep. The abundance of P. paulensis is regulated mainly by the temperature, the summer being the season of greater profusion. The major recruiting period takes place in the Spring with shrimps measuring between 1,0 to 3,0 cm and approximately 2,0 months old. The po...

  8. Estudo populacional do camarão-rosa Penaeus Paulensis pérez farfante (natantia, penaeidae na Lagoa da Conceiçáo, Santa Catarina, Brasil Populational study of the pink-shrimp Penaeus Paulensis pérez farfante (natantia, penaeidae in the Conceição Lake, Florianópolis, Santa Catarina, Brazil

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    Joaquim Olinto Branco

    1998-01-01

    Full Text Available In the time period between May/92 to April/93, 2693 (1243 males and 1450 females specimens of Penaeus paulensis Pérez Farfante, 1967 were collected. The shrimps were captured by night using a hand net in äreas between 30 to 150 cm deep. The abundance of P. paulensis is regulated mainly by the temperature, the summer being the season of greater profusion. The major recruiting period takes place in the Spring with shrimps measuring between 1,0 to 3,0 cm and approximately 2,0 months old. The population reaches the pre-adult in the Fall-Winter period with average length between 8,8 cm (females and 9,3 cm (males. The migration to the ocean occurs during the Winter. The artisanal fishing in the Conceição Lake is predatory, acting upon the young and pre-adult shrimps, which may jeopardize the marine reproducer stock.

  9. Fukuyoa paulensis gen. et sp. nov., a new genus for the globular species of the dinoflagellate Gambierdiscus (Dinophyceae.

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    Fernando Gómez

    Full Text Available The marine epiphytic dinoflagellate Gambierdiscus is a toxicologically important genus responsible for ciguatera fish poisoning, the principal cause of non-bacterial illness associated with fish consumption. The genus currently contains species exhibiting either globular or anterior-posteriorly compressed morphologies with marked differences in cell shape and plate arrangement. Here we report a third globular, epiphytic and tychoplanktonic species from the coasts of Ubatuba, Brazil. The new species can be distinguished from G. yasumotoi and G. ruetzleri by its broader first apical plate that occupies a larger portion of the epitheca. Accordingly, phylogenetic trees from small subunit (SSU and large subunit (LSU ribosomal DNA sequences also showed strongly supported separation of the new species from the G. yasumotoi/G. ruetzleri group albeit with short distance. The molecular phylogenies, which included new sequences of the planktonic species Goniodoma polyedricum, further indicated that the globular species of Gambierdiscus formed a tight clade, clearly separated (with strong bootstrap support from the clade of lenticular species including the type for Gambierdiscus. The morphological and molecular data in concert support the split of Gambierdiscus sensu lato into two genera. Gambierdiscus sensu stricto should be reserved for the species with lenticular shapes, highly compressed anterioposteriorly, with short-shank fishhook apical pore plate, large 2' plate, low and ascending cingular displacement, and pouch-like sulcal morphology. The new genus name Fukuyoa gen. nov. should be applied to the globular species, slightly laterally compressed, with long-shank fishhook apical pore plate, large 1' plate, greater and descending cingular displacement, and not pouch-like vertically-oriented sulcal morphology. Fukuyoa contains the new species Fukuyoa paulensis gen. et sp. nov., and F. yasumotoi comb. nov. and F. ruetzleri comb. nov.

  10. Fukuyoa paulensis gen. et sp. nov., a New Genus for the Globular Species of the Dinoflagellate Gambierdiscus (Dinophyceae)

    Science.gov (United States)

    Gómez, Fernando; Qiu, Dajun; Lopes, Rubens M.; Lin, Senjie

    2015-01-01

    The marine epiphytic dinoflagellate Gambierdiscus is a toxicologically important genus responsible for ciguatera fish poisoning, the principal cause of non-bacterial illness associated with fish consumption. The genus currently contains species exhibiting either globular or anterior-posteriorly compressed morphologies with marked differences in cell shape and plate arrangement. Here we report a third globular, epiphytic and tychoplanktonic species from the coasts of Ubatuba, Brazil. The new species can be distinguished from G. yasumotoi and G. ruetzleri by its broader first apical plate that occupies a larger portion of the epitheca. Accordingly, phylogenetic trees from small subunit (SSU) and large subunit (LSU) ribosomal DNA sequences also showed strongly supported separation of the new species from the G. yasumotoi / G. ruetzleri group albeit with short distance. The molecular phylogenies, which included new sequences of the planktonic species Goniodoma polyedricum, further indicated that the globular species of Gambierdiscus formed a tight clade, clearly separated (with strong bootstrap support) from the clade of lenticular species including the type for Gambierdiscus. The morphological and molecular data in concert support the split of Gambierdiscus sensu lato into two genera. Gambierdiscus sensu stricto should be reserved for the species with lenticular shapes, highly compressed anterioposteriorly, with short-shank fishhook apical pore plate, large 2' plate, low and ascending cingular displacement, and pouch-like sulcal morphology. The new genus name Fukuyoa gen. nov. should be applied to the globular species, slightly laterally compressed, with long-shank fishhook apical pore plate, large 1' plate, greater and descending cingular displacement, and not pouch-like vertically-oriented sulcal morphology. Fukuyoa contains the new species Fukuyoa paulensis gen. et sp. nov., and F. yasumotoi comb. nov. and F. ruetzleri comb. nov. PMID:25831082

  11. Fukuyoa paulensis gen. et sp. nov., a new genus for the globular species of the dinoflagellate Gambierdiscus (Dinophyceae).

    Science.gov (United States)

    Gómez, Fernando; Qiu, Dajun; Lopes, Rubens M; Lin, Senjie

    2015-01-01

    The marine epiphytic dinoflagellate Gambierdiscus is a toxicologically important genus responsible for ciguatera fish poisoning, the principal cause of non-bacterial illness associated with fish consumption. The genus currently contains species exhibiting either globular or anterior-posteriorly compressed morphologies with marked differences in cell shape and plate arrangement. Here we report a third globular, epiphytic and tychoplanktonic species from the coasts of Ubatuba, Brazil. The new species can be distinguished from G. yasumotoi and G. ruetzleri by its broader first apical plate that occupies a larger portion of the epitheca. Accordingly, phylogenetic trees from small subunit (SSU) and large subunit (LSU) ribosomal DNA sequences also showed strongly supported separation of the new species from the G. yasumotoi/G. ruetzleri group albeit with short distance. The molecular phylogenies, which included new sequences of the planktonic species Goniodoma polyedricum, further indicated that the globular species of Gambierdiscus formed a tight clade, clearly separated (with strong bootstrap support) from the clade of lenticular species including the type for Gambierdiscus. The morphological and molecular data in concert support the split of Gambierdiscus sensu lato into two genera. Gambierdiscus sensu stricto should be reserved for the species with lenticular shapes, highly compressed anterioposteriorly, with short-shank fishhook apical pore plate, large 2' plate, low and ascending cingular displacement, and pouch-like sulcal morphology. The new genus name Fukuyoa gen. nov. should be applied to the globular species, slightly laterally compressed, with long-shank fishhook apical pore plate, large 1' plate, greater and descending cingular displacement, and not pouch-like vertically-oriented sulcal morphology. Fukuyoa contains the new species Fukuyoa paulensis gen. et sp. nov., and F. yasumotoi comb. nov. and F. ruetzleri comb. nov.

  12. First report of White spot syndrome virus in farmed and wild penaeid shrimp from lagoa dos patos estuary, southern brazil

    OpenAIRE

    Cavalli, Lissandra Souto; Romano, Luis Alberto; Marins, Luis Fernando; Abreu, Paulo César

    2011-01-01

    In this study, we detected White spot syndrome virus (WSSV) in wild Farfantepenaeus paulensis collected in the Lagoa dos Patos estuary and cultivated Litopenaeus vannamei. This is the first report of WSSV in F. paulensis from Lagoa dos Patos and farmed L. vannamei shrimps in Rio Grande do Sul.

  13. First report of White spot syndrome virus in farmed and wild penaeid shrimp from lagoa dos patos estuary, southern brazil.

    Science.gov (United States)

    Cavalli, Lissandra Souto; Romano, Luis Alberto; Marins, Luis Fernando; Abreu, Paulo César

    2011-07-01

    In this study, we detected White spot syndrome virus (WSSV) in wild Farfantepenaeus paulensis collected in the Lagoa dos Patos estuary and cultivated Litopenaeus vannamei. This is the first report of WSSV in F. paulensis from Lagoa dos Patos and farmed L. vannamei shrimps in Rio Grande do Sul.

  14. First report of White spot syndrome virus in farmed and wild penaeid shrimp from Lagoa dos Patos estuary, southern Brazil

    OpenAIRE

    Lissandra Souto Cavalli; Luis Alberto Romano; Luis Fernando Marins; Paulo César Abreu

    2011-01-01

    In this study, we detected White spot syndrome virus (WSSV) in wild Farfantepenaeus paulensis collected in the Lagoa dos Patos estuary and cultivated Litopenaeus vannamei. This is the first report of WSSV in F. paulensis from Lagoa dos Patos and farmed L. vannamei shrimps in Rio Grande do Sul.

  15. Effects of Exposure of Pink Shrimp, Farfantepenaeus duorarum, Larvae to Macondo Canyon 252 Crude Oil and the Corexit Dispersant

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    Susan Laramore

    2016-03-01

    Full Text Available The release of oil into the Gulf of Mexico (GOM during the Deepwater Horizon event coincided with the white and pink shrimp spawning season. To determine the potential impact on shrimp larvae a series of static acute (24–96 h toxicity studies with water accommodated fractions (WAFs of Macondo Canyon (MC 252 crude oil, the Corexit 9500A dispersant, and chemically enhanced WAFS (CEWAFs were conducted with nauplii, zoea, mysid, and postlarval Farfantepenaeus duorarum. Median lethal concentrations (LC50 were calculated and behavior responses (swimming, molting, light sensitivity evaluated. Impacts were life stage dependent with zoea being the most sensitive. Behavioral responses for all stages, except postlarvae, occurred at below LC50 values. Dispersants had the greatest negative impact while WAFs had the least. No short-term effects (survival, growth were noted for nauplii exposed to sub-lethal CEWAFs 39 days post-exposure. This study points to the importance of evaluating multiple life stages to assess population effects following contaminant exposure and further, that the use of dispersants as a method of oil removal increases oil toxicity.

  16. Variación morfológica del camarón café (Farfantepenaeus californiensis) en el Pacífico mexicano

    OpenAIRE

    2012-01-01

    El análisis multivariado de datos morfométricos se ha utilizado ampliamente en especies comerciales para definir unidades de pesca independientes. En la presente investigación se analizó la diferenciación del camarón café Farfantepenaeus californiensis (Holmes, 1900) del Pacífico mexicano mediante el análisis morfométrico de 171 individuos recolectados en 4 localidades y se comparó con la subdivisión geográfica que el Instituto Nacional de la Pesca estableció para el monitoreo de sus poblacio...

  17. Susceptibilidade do CamarÃo Rosa Farfantepenaeus subtilis (PÃrez-Farfante, 1967) ao VÃrus da Mionecrose Infecciosa (IMNV)

    OpenAIRE

    Ana Cecilia Gomes Silva

    2009-01-01

    As enfermidades virais sÃo as que causam maiores prejuÃzos registrados na carcinicultura. O surgimento do IMNV no Nordeste do Brasil em 2002 colocou os produtores de camarÃo frente a uma enfermidade desconhecida que causou perdas significativas para o setor, tornando imperativo buscar um maior conhecimento sobre a doenÃa e de como podem se comportar outras espÃcies de camarÃo ao vÃrus do IMN. O objetivo deste trabalho foi avaliar a susceptibilidade do camarÃo rosa Farfantepenaeus subtilis,...

  18. Variación morfológica del camarón café (Farfantepenaeus californiensis en el Pacífico mexicano Morphological variation of brown shrimp (Farfantepenaeus californiensis in Mexican Pacific

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    María de Lourdes Barbosa-Saldaña

    2012-03-01

    Full Text Available El análisis multivariado de datos morfométricos se ha utilizado ampliamente en especies comerciales para definir unidades de pesca independientes. En la presente investigación se analizó la diferenciación del camarón café Farfantepenaeus californiensis (Holmes, 1900 del Pacífico mexicano mediante el análisis morfométrico de 171 individuos recolectados en 4 localidades y se comparó con la subdivisión geográfica que el Instituto Nacional de la Pesca estableció para el monitoreo de sus poblaciones. La variación morfológica de cada muestra se estimó mediante el (CV% promedio de 18 medidas. Se realizó un análisis discriminante utilizando proporciones estandarizadas de algunas de estas medidas y se calcularon las distancias de Manhattan entre las muestras; con éstas se obtuvo un dendrograma por el método UPGMA en el cual la agrupación de las localidades mostró una diferenciación morfológica clinal, relacionada con un gradiente geográfico. La baja variabilidad morfológica estimada al interior de las muestras permitió inferir que cada localidad conforma un grupo fenotípicamente homogéneo, aunque con claras diferencias entre sí, que podrían estar relacionadas con las características ambientales de cada localidad y con posibles variaciones genéticas entre las poblaciones. La diferenciación morfológica del camarón café del Pacífico mexicano que se encontró en esta investigación aporta elementos adicionales para sustentar la división geográfica que el Instituto Nacional de la Pesca ha establecido para el estudio de la pesquería del camarón.Multivariate analyses of morphometric data have been widely used to define independent fishing units for exploited species. In this study we analyzed the morphometric variability of 4 brown shrimp Farfantepenaeus californiensis (Holmes, 1900 locations from the Mexican Pacific to assess whether differentiation agrees with the geographical subdivision established by the Instituto

  19. Variación interanual de la abundancia de Farfantepenaeus californiensis (Holmes 1900 en el Golfo de Tehuantepec Annual abundance variation of Farfantepenaeus californiensis (Holmes 1900 in the Gulf of Tehuantepec

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    Pedro Cervantes-Hernández

    2008-12-01

    Full Text Available La variación interanual de la abundancia de reclutas (índice FR y reproductores (índice DA de Farfantepenaeus californiensis (Holmes, 1900, se modeló empleando a los grupos de edad relacionados con los procesos naturales de reclutamiento y reproducción en el Golfo de Tehuantepec (GT. El índice FR fue modelado con el grupo de cuatro meses y el índice DA con los grupos de seis a 11 meses. Se cuantificó la relación entre la temperatura superficial del mar (TSM y ambos índices poblacionales de 1989 a 1998, y adicionalmente, entre éstos y la concentración de Clorofila a (Cla de noviembre 1996 a mayo 1998. En ambos intervalos, la TSM tuvo un correlación directamente proporcional con FR e inversamente proporcional con DA. En el segundo intervalo, la Cla fue mayor durante los máximos DA (R = 0.5627 y menor durante el máximo FR (R = -0.6887. La correlación entre la TSM y Cla fue de R = -0.6452. Entre octubre/noviembre y enero, la abundancia de reproductores fue mayor a la de reclutas. Los máximos DA coincidieron con los máximos Cla y los mínimos TSM durante la temporada de nortes o "tehuanos". El reclutamiento masivo al ambiente marino, se observó entre julio y agosto/septiembre, cuando las condiciones oceanográficas en el GT fueron inversas a las descritas para el índice DA. La variación interanual de la abundancia de los índices FR y DA se mantiene aún con la presencia de "El Niño" en el GT, pero su abundancia disminuye.The annual abundance variation of recruits (FR index and spawners (DA index of Farfantepenaeus californiensis (Holmes 1900 was modeled with age groups related with the natural processes of recruitment and reproduction in the Gulf of Tehuantepec (GT. The FR Index was modeled using the age group of four months and the DA index with the age groups from six to 11 months. The relationships between the sea surface temperature (SST and both population indices from 1989 to 1998 were quantified, between these and the

  20. The pink shrimp Farfantepenaeus duorarum, its symbionts and helminths as bioindicators of chemical pollution in Campeche Sound, Mexico.

    Science.gov (United States)

    Vidal-Martínez, V M; Aguirre-Macedo, M L; Del Rio-Rodríguez, R; Gold-Bouchot, G; Rendón-von Osten, J; Miranda-Rosas, G A

    2006-06-01

    The pink shrimp Farfantepenaeus duorarum may acquire pollutants, helminths and symbionts from their environment. Statistical associations were studied between the symbionts and helminths of F. duorarum and pollutants in sediments, water and shrimps in Campeche Sound, Mexico. The study area spatially overlapped between offshore oil platforms and natural shrimp mating grounds. Spatial autocorrelation of data was controlled with spatial analysis using distance indices (SADIE) which identifies parasite or pollutant patches (high levels) and gaps (low levels), expressing them as clustering indices compared at each point to produce a measure of spatial association. Symbionts included the peritrich ciliates Epistylis sp. and Zoothamnium penaei and all symbionts were pooled. Helminths included Hysterothylacium sp., Opecoeloides fimbriatus, Prochristianella penaei and an unidentified cestode. Thirty-five pollutants were identified, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), pesticides and heavy metals. The PAHs (2-3 ring) in water, unresolved complex mixture (UCM), Ni and V in sediments, and Zn, Cr and heptachlor in shrimps were significantly clustered. The remaining pollutants were randomly distributed in the study area. Juvenile shrimps acquired pesticides, PAHs (2-3 rings) and Zn, while adults acquired PAHs (4-5 rings), Cu and V. Results suggest natural PAH spillovers, and continental runoff of dichlorodiphenyltrichloroethane (DDT), PCBs and PAHs (2-3 ring). There were no significant associations between pollutants and helminths. However, there were significant negative associations of pesticides, UCM and PCBs with symbiont numbers after controlling shrimp size and spatial autocorrelation. Shrimps and their symbionts appear to be promising bioindicators of organic chemical pollution in Campeche Sound.

  1. Nearshore concentration of pink shrimp (Farfantepenaeus duorarum) postlarvae in northern Florida bay in relation to nocturnal flood tide

    Science.gov (United States)

    Criales, Maria M.; Robblee, M.B.; Browder, Joan A.; Cardenas, H.; Jackson, Thomas L.

    2010-01-01

    We address the question of whether the low abundance of juvenile pink shrimp Farfantepenaeus duorarum (Burkenroad, 1939) in northern-central Florida Bay results from (i) limiting environmental conditions, (ii) a reduced postlarval transport, or (iii) both. To explore this question, postlarvae were collected during the new moon in both summer and fall of 2004 and 2005 at six stations located on a transect from the bay's western margin to its interior. The highest concentrations of postlarvae occurred at two mid-transect stations located in shallow channels with moderate tidal amplitudes (15-20 cm) and dense seagrass beds. At the two interiormost stations postlarval concentrations decreased together with a reduction of the tidal amplitude (= 1 cm). Estimates of the cumulative flood-tide displacement with the semidiurnal M2 constituent indicated that the tide moves a maximum of 15 km in four nights, a distance that corresponds to the location of the highest concentrations of postlarvae. The size of postlarvae also reached a maximum at the location of the highest concentrations of postlarvae. Results suggest that postlarvae move into the bay's interior by a cumulative flood tidal process, advancing onshore during successive nights as far as they can go with the tide. Analyses indicate that, in addition to the tidal amplitude, cross-shelf wind stress and salinity also affect the concentrations of postlarvae. Peaks of postlarvae occurred at times of low salinity and strong southeasterly winds. While tidal transport appears to be insufficient for postlarvae to reach Florida Bay's interior, salinity and winds may also contribute to the observed distribution patterns of early pink shrimp recruits. ?? 2010 Rosenstiel School of Marine and Atmospheric Science of the University of Miami.

  2. Alimento potencial para juveniles del camarón rosado (Farfantepenaeus notialis en el 2009 Golfo de Ana María Cuba

    Directory of Open Access Journals (Sweden)

    Michel Cantón-Machín

    2011-03-01

    Full Text Available ResumenSe determinaron las diferencias temporales y espaciales, en cuanto a:densidad y composición taxonómica del alimento potencial para juveniles del camarón rosado (Farfantepenaeus notialis; así como la relación de la densidad del alimento con respecto a la abundancia y composición por talla de juveniles del camarón, oxígeno disuelto, temperatura, salinidad y los nutrientes en el agua (fósforo inorgánico, nitrito, nitrato y amonio, en los meses de abril a septiembre del 2009, Golfo de Ana María, Cuba.SummaryWe determined the temporal and spatial differences in terms of: density and taxonomic composition and potential food for juveniles of the pink shrimp (Farfantepenaeus notialis, and the relationship between the density of potential food and abundance and composition by size of juveniles of the pink shrimp, dissolved oxygen, temperature, salinity and nutrients in the water (inorganic phosphorus, nitrite, nitrate and ammonium between april and september 2009, at the Ana Maria Gulf, Cuba.

  3. [Impact of surface temperature and salinity on the recruiting of the pink shrimp Farfantepenaeus duorarum (Decapoda: Penaeidae), in Sonda de Campeche, Gulf of Mexico].

    Science.gov (United States)

    Ramírez-Rodríguez, Mauricio; Arreguín-Sánchez, Francisco; Lluch-Belda, Daniel

    2006-12-01

    We studied the long term effects of two environmental variables, salinity and surface temperature, on the pink shrimp (Farfantepenaeus duorarum) population in the southern Gulf of Mexico, considering the relationship between recruiting and the concurrent shrimp stock depletion of the last two decades. Our data were collected from 1969 to 1991. Recruitment has been clearly declining, particularly in the 1970s, with an accentuated drop since the 1980s. Sea surface temperatures have steadily risen, particularly since 1972. The temperature difference between the mid 1970s and the late 1980s is 0.5 degree C. Salinity decreased throughout the period. From a long term perspective, recruitment is negatively correlated with temperature and positively correlated with salinity. The effects of temperature and salinity are statistically significant, explaining 52 % and 55 % of the variation in recruitment, respectively.

  4. Abundancia y distribución de juveniles de Farfantepenaeus aztecus (Ives 1891, F. duorarum (Burkenroad 1939 y Litopenaeus setiferus (Linnaeus 1767 en la Laguna Madre, Tamaulipas, México Juveniles abundance and distribution of Farfantepenaeus aztecus (Ives 1891, F. duorarum (Burkenroad 1939 and Litopenaeus setiferus (Linnaeus 1767 in Laguna Madre, Tamaulipas, Mexico

    Directory of Open Access Journals (Sweden)

    Alberto Ocaña-Luna

    2008-12-01

    Full Text Available Se analizó la distribución y abundancia de los juveniles de camarones peneidos en Laguna Madre, en base a las recolectas realizadas en los meses de octubre (1997 y enero, mayo, julio (1998, con una red cónica de 50 cm de diámetro y 505 de apertura de malla, con un flujómetro adaptado a la misma. Además se tomaron datos de salinidad y temperatura superficial. Se realizó un análisis de varianza (ANOVA y una prueba de rangos múltiples (SNK para comparar las tallas entre las especies. La especie más abundante fue Farfantepenaeus aztecus con el 84.5% de la abundancia total, seguida por Litopenaeus setiferus con el 10.6% y Farfantepenaeus duorarum con el 3.4%, en el invierno la abundancia de F. aztecus y L. setiferus fue mayor. Se observaron diferencias significativas entre las tallas de juveniles de F. aztecus (11.7 mm y L. setiferus (11.8 mm con respecto a la talla de F. duorarum (11.0 mm (F = 7.81, p = 0.05; SNK = 0.71, p = 0.05; SNK = -0.83, p = 0.05.The Penaeid shrimp planktonic juvenile distribution and abundance from Laguna Madre were analyzed, based in samples collected in the months of October 1997, January, May and July 1998 with a conical net of 50 cm diameter and 505 mesh size, with an adapted flowmeter; moreover water salinity and superficial temperture data were recorded. The size among species was compared with a variance analysis (ANOVA and a multiple ranks test (SNK. Farfantepenaeus aztecus was the most abundant species with 84.5% of the total abundance, following by L. setiferus with 10.6% and F. duorarum with 3.4%. The abundance of F. aztecus and L. setiferus was greatest during the winter. Significant differences were observed between the sizes of juveniles of F. aztecus (11.7 mm and L. setiferus (11.8 mm with respect to the size of F. duorarum (11.0 mm (F = 7.81, p = 0.05; SNK = 0.71, p = 0.05; SNK = -0.83, p = 0.05.

  5. Characterization of a novel peptide toxin from Acanthoscurria paulensis spider venom: a distinct cysteine assignment to the HWTX-II family.

    Science.gov (United States)

    Mourão, Caroline B F; Heghinian, Mari D; Barbosa, Eder A; Marí, Frank; Bloch, Carlos; Restano-Cassulini, Rita; Possani, Lourival D; Schwartz, Elisabeth F

    2013-04-01

    Spider venom toxins have raised interest in prospecting new drugs and pesticides. Nevertheless, few studies are conducted with tarantula toxins, especially with species found in Brazil. This study aims to characterize chemically and biologically the first toxin isolated from Acanthoscurria paulensis venom. Ap1a consists of 48 amino acid residues and has a molecular mass of 5457.79 Da. The cloned gene encodes a putative sequence of 23 amino acid residues for the signal peptide and 27 for the pro-peptide. The sequence of the mature peptide is 60-84% identical with those of toxins of the HWTX-II family. Different from the structural pattern proposed for these toxins, the disulfide pairing of Ap1a is of the ICK type motif, which is also shared by the U1-TRTX-Bs1a toxin. Ap1a induced a dose-dependent and reversible paralytic effect in Spodoptera frugiperda caterpillars, with an ED50 of 13.0 ± 4.2 μg/g 8 h after injections. In the Drosophila melanogaster Giant Fiber circuit, Ap1a (1.14-22.82 μg/g) reduces both the amplitude and frequency of responses from GF-TTM and GF-DLM pathways, suggesting an action at the neuromuscular junction, which is mediated by glutamatergic receptors. It is also lethal to mice (1.67 μg/g, intracranial route), inducing effects similar to those reported with intracerebroventricular administration of NMDA. Ap1a (1 μM) does not alter the response induced by acetylcholine on the rhabdomyosarcoma cell preparation and shows no significant effects on hNav1.2, hNav1.4, hNav1.5, and hNav1.6 channels. Because of its unique sequence and cysteine assignment to the HWTX-II family, Ap1a is a significant contribution to the structure-function study of this family of toxins.

  6. Microbiological, physico-chemical, and sensorial modifications during the useful life of the shrimps (Penaeus brasiliensis e Penaeus Paulensis) submitted to gamma radiation.; Alteracoes microbiologicas, fisico-quimicas e sensoriais durante a vida util do camarao-rosa (Penaeus brasiliensis e Penaeus Paulensis) submetido a radiacao gama

    Energy Technology Data Exchange (ETDEWEB)

    Mayer, Mariana Del Ben

    2000-07-01

    During the last years, there has been an increase in the consumption of seafood and freshwater fish as a healthier diet option. Shrimps are the most important product in the international trade market. This kind of food easily deteriorates due to autolysis, oxidation and microbial action. This research was carried out in order to study the effectiveness of radiation in preserving shrimps. Samples of shrimps (Penaeus brasiliensis and P. paulensi) were submitted to gamma radiation doses of O kGy, 1 kGy, 2 kGy, 2.5 kGy, 3 kGy and 3.5 kGy and stored under refrigeration. The microbiological analysis was performed on days O, 2, 4, 7 10 and 14 post processing. Simultaneously, the pH and total, volatile bases (TVBN) were determined. The psychotropic population varied from <2.0 log to 8.08 log CFU/g while the mesophilic ranged from <1.0 109 to 6.03 log CFU/g; pH varied from 7.52 to 8.33 and TVBN from 28.47 to 56.00 mg N/100g, according to the radiation dose and the day of analysis. Black spots, changes in the characteristic odour and TVBN levels showed the beginning of a chemical deterioration as of the 4 th day of analysis. Doses of 3 kGy and 3.5 kGy presented the best results. Pseudomonas spp. showed the highest sensitivity to radiation. Due to the lapse of time between capturing shrimps and returning to land together with inadequate manipulation and storage in the boat, the quality of raw material is prejudiced which makes the radiation process unfeasible. (author)

  7. Spatial distribution of southern brown shrimp (Farfantepenaeus subtilis on the Amazon continental shelf: a fishery, marine geology and GIS integrated approach

    Directory of Open Access Journals (Sweden)

    Déborah E. G. Martins

    2015-12-01

    Full Text Available Abstract The spatial distribution of the southern brown shrimp Farfantepenaeus subtilis (Pérez-Farfante, 1967 was studied based on industrial fishing fleet activities and is associated with geological and oceanographic characteristics of the benthonic environments on the Amazon continental shelf. Using a geographical information system (GIS this paper sought to calculate the relative abundance of brown shrimp based on catch per unit effort (CPUE and compare it with bathymetry, type of sedimentary structure, sedimentation rate and bottom salinity. As a result, we have concluded that the relative abundance (in terms of CPUE is not uniformly distributed in space. Spatial analysis indicates that commercial trawling efforts were made in the (foreset region of the subaqueous Amazon delta at depths of 40 to 60 m. In this region, prawn are responsible for the bioturbation of the sediments and the creation of a sedimentary structure called mottled mud. In the foreset region, sedimentation rates progressively increased up to 10 cm.yr-1; re-suspension was reduced and bottom salinity was high (~ 36. It appears that all of these factors define a stable muddy area with intense bioturbation. This notable biological activity is to be explained by the occurrence of a high F. subtilis abundance that appears to originate in a microbial loop. We concluded that by combining fishery information with environmental data from a GIS, it was possible to identify abundance distribution patterns for southern brown shrimp and other economically important fishery resources and to understand how they change on a large spatial-scale.

  8. Crescimento do camarão marinho Farfantepenaeus subtilis (Pérez- Farfante, 1967 cultivado em tanques com diferentes protocolos de fertilização orgânica = Growth of marine shrimp Farfantepenaeus subtilis (Pérez-Farfante, 1967 in tanks under different organic fertilization protocols

    Directory of Open Access Journals (Sweden)

    Flávia Maria Maciel Carneiro de Souza

    2009-07-01

    Full Text Available Este trabalho objetivou avaliar o crescimento do camarão Farfantepenaeus subtilis submetido a diferentes regimes de fertilização usando fertilizantes orgânicos e inorgânicos. O desenho experimental consistiu de três tratamentos e três repetições: controle (CT – 3 mg L-1 de ureia e 0,3 mg L-1 de monoamônio fosfato; farelo de trigo (FT – 25 g m-2; farelo de soja (FS – 18,75 g m-2. Nove tanques de 500 L foram estocados com 16 camarões m-2 (≈ 2,7 g, os quais foram alimentados com ração comercial contendo 35% de proteína bruta. Quinzenalmente, a qualidade da água foi monitorada e amostras de camarões foram coletadas para avaliar o crescimento e reajustar a quantidade de ração. Durante o cultivo, a qualidade da água manteve-se adequada ao cultivo do camarão. Os dados de crescimento e sobrevivência demonstraram não haver diferença estatística (p > 0,05 entre os tratamentos. O crescimento médio e a sobrevivência foram de 0,44 g semana-1 e 75%, respectivamente.Portanto, os protocolos testados foram igualmente eficientes para o crescimento do F. subtilis e manutenção da qualidade da água.This work aimed to evaluate the growth of the shrimp Farfantepenaeus subtilis submitted to different fertilization regimes using organic and inorganic fertilizers. The experimental design consisted of threetreatments in triplicate: control (CT – 3 mg L-1 of urea and 0.3 mg L-1 of monoammonium phosphate; wheat bran (FT – 25 g m-2; and soybean bran (FS – 18.75 g m-2. Nine 500 L fiber glass tanks were stocked with 16 shrimp m-2 (≈ 2.7 g. Animals were fed daily withpelleted feed (35% crude protein. Biweekly, water quality was monitored and shrimp samples were collected to evaluate growth and adjust the feed quantity. Water quality maintained adequate to shrimp culture during the experimental period. Growth results did not differ significantly (p > 0.05 among treatments. Mean growth rate and survival were 0.44 g week-1 and 75

  9. Disponibilidad alimentaria del camarón rosado (Farfantepenaeus notialis, en zonas de cría del golfo de Ana María, Sureste de Cuba - Food availability of pink shrimp (Farfantepenaeus notialis in farming zones of the gulf of Ana María, southeast of Cuba

    Directory of Open Access Journals (Sweden)

    Cantón-Machín, Michel

    2010-07-01

    Full Text Available ResumenSe estudió la disponibilidad alimentaria del camarón rosado(Farfantepenaeus notialis, desde 1987-89 y 2007-08 en 10 áreas dela línea de costa del golfo de Ana María localizada entre 22º 45' N y78º 05' W hasta los 21º 10' N y 78º 40' W (zona I y entre 21º 20' N y78º 50' W hasta los 21º 35' N y 79º 20' W (zona II. Se analizaron dosfracciones de organismos del epibentos para determinar la composición taxonómica y la densidad total, así como, su relación con la abundancia y composición por talla de los juveniles del camarónrosado y con las variables abióticas analizadas. Los copépodos fueronlos organismos más representativos del epibentos, en la zona I (80-88% y en la II (82-99 % del total de organismos, seguido de losmoluscos entre un 11 y 5 % en zona I y en la II los anfípodos un 8 %en el 2007. En la zona I, se encontraron diferencias en la densidadtotal y por tamices de los organismos del epibentos, y la salinidad del agua, mientras en la zona II, sólo en la temperatura del agua. En el período del 1987-89 existen diferencias significativas en ladisponibilidad alimentaria con respecto al 2007-08. Existe correlaciónpositiva y significativa entre la densidad total de los organismos delepibentos respecto a la abundancia de juveniles; temperatura ysalinidad del agua. SummaryWe studied food availability for pink shrimp (Farfantepenaeus notialis, from 1987-89 and 2007-08 in 10 areas of the Gulf of Ana María coastline located between 22º 45' N and 78º 05' W up to 21º 10' N and 78º 40' W (zone I and between 21º 20' N and 78º 50' W up to21º 35' N and 79º 20' W (zone II. Two fractions of epibenthicorganisms were analyzed to determine the taxonomic composition andtotal density, also their relationship with pink shrimp juvenileabundance, the size composition and the abiotic variables wasstablished. Copepods were the most representative organisms in theepibenthos in zone I (80-88% and in zone II (82-99%, followed

  10. Disponibilidad alimentaria del camarón rosado (Farfantepenaeus notialis, en zonas de cría del golfo de Ana María, Sureste de Cuba - Food availability of pink shrimp (Farfantepenaeus notialis in farming zones of the gulf of Ana María, southeast of Cuba

    Directory of Open Access Journals (Sweden)

    Michel Cantón, Machín

    2010-03-01

    Full Text Available ResumenSe estudió la disponibilidad alimentaria del camarón rosado(Farfantepenaeus notialis, desde 1987-89 y 2007-08 en 10 áreas de lalínea de costa del golfo de Ana María localizada entre 22º 45' N y 78º 05' W hasta los 21º 10' N y 78º 40' W (zona I y entre 21º 20' N y 78º 50' W hasta los 21º 35' N y 79º 20' W (zona II. Se analizaron dos fracciones de organismos del epibentos para determinar la composición taxonómica y la densidad total, así como, su relación con la abundancia y composición por talla de los juveniles del camarón rosado y con las variables abióticas analizadas. Los copépodos fueron los organismos más representativos del epibentos, en la zona I (80-88 % y en la II (82-99 % del total de organismos, seguido de los moluscos entre un 11 y 5 % en zona I y en la II los anfípodos un 8 % en el 2007. En la zona I, se encontraron diferencias en la densidad total y por tamices de los organismos del epibentos, y la salinidad del agua, mientras en la zona II, sólo en la temperatura del agua. En el período del 1987-89 existen diferencias significativas en la disponibilidad alimentaria con respecto al 2007-08. Existe correlación positiva y significativa entre la densidad total de losorganismos del epibentos respecto a la abundancia de juveniles;temperatura y salinidad del agua. SummaryWe studied food availability for pink shrimp (Farfantepenaeus notialis, from 1987-89 and 2007-08 in 10 areas of the Gulf of Ana María coastline located between 22º 45' N and 78º 05' W up to 21º 10' N and 78º 40' W (zone I and between 21º 20' N and 78º 50' W up to 21º 35' N and 79º 20' W (zone II. Two fractions of epibenthic organisms were analyzed to determine the taxonomic composition and total density, also their relationship with pink shrimp juvenile abundance, the size composition and the abiotic variables was stablished. Copepods were the most representative organisms in the epibenthos in zone I (80-88% and in zone II (82

  11. Genética poblacional del camarón rosado Farfantepenaeus notialis (Decápoda: Penaeidae): variación espacio temporal de la diversidad y la estructura genética

    OpenAIRE

    Robainas Barcia, A.

    2004-01-01

    En este trabajo se analiza la variación espacio temporal de los patrones de diversidad genética y estructura poblacional del camarón rosado Farfantepenaeus notialis, en la plataforma Sur de Cuba. Se estudiaron, 22 loci aloenzimáticos, de los cuales seis resultaron polimórficos (Akp3, AmyB, Est3, Gdh, GP7 y Per1); cinco loci microsatélites (PnS01, PnS03, PnS04, PnS18 y PnS20); y un fragmento de 2027pb del ADNmt, en muestras procedentes de ocho localidades del Golfo de Ana María, tres del Golfo...

  12. Estimación de la emigración del camarón café Farfantepenaeus aztecus a través de la boca del Mezquital, Tamaulipas, México Emigration assessment of the Brown Shrimp Farfantepenaeus aztecus through Mezquital Inlet, Tamaulipas, Mexico

    Directory of Open Access Journals (Sweden)

    Armando T. Wakida-Kusunoki

    2010-01-01

    Full Text Available Se presentan la variación en abundancia de juveniles de camarón café (Farfantepeneaeus aztecus durante su principal periodo de emigración hacia el mar, en la boca del Mezquital, Tamaulipas. Los muestreos fueron realizados entre mayo y julio del 2003 al 2007 y consistieron en el uso de una red de corriente experimental durante el periodo nocturno y durante periodos de bajamar, en los tres días anteriores y posteriores a la presencia de luna nueva y llena. La información fue complementada con datos de abundancia obtenidos con arrastres en cruceros de investigación realizados en la costa de Tamaulipas durante mayo a julio del 2003 al 2007. Los resultados muestran que los máximos valores de emigración (kg/noche se presentan durante el periodo lunar a finales de mayo y/o principios de junio, indistintamente de la fase lunar y se relacionaron directamente con aumentos en los valores de abundancia en la zona costera y marina. Estos resultados son de gran importancia porque demuestran que mayo y junio son meses críticos para esta especie, y sirven como base para la definición de los periodos de veda para la pesca de camarón, tanto en la zona lagunar como en altamar.Variations of juvenile abundance of brown shrimp (Farfantepenaeus aztecus during its main period of migration in Mezquital Inlet, Tamaulipas are presented. Sampling was carried out from 2003 to 2007 between May and July and consisted in the use of an experimental net during the nocturnal period and ebb tide, three days before and after full and new moon. The information was complemented with abundance data of trawl research cruises carried out off the coast of Tamaulipas between May and July from 2003 to 2007. The results showed that the higher values of emigration (kg/night occurred during the moon period in late May or early June, independently of the lunar phase. The higher values of emigration toward the sea are directly related to the increase in the abundance in the coastal

  13. Crescimento do camarão marinho Farfantepenaeus subtilis (Pérez-Farfante, 1967 cultivado em tanques com diferentes protocolos de fertilização orgânica - DOI: 10.4025/actascibiolsci.v31i3.7565 Growth of marine shrimp Farfantepenaeus subtilis (Pérez-Farfante, 1967 in tanks under different organic fertilization protocols - DOI: 10.4025/actascibiolsci.v31i3.7565

    Directory of Open Access Journals (Sweden)

    Diogo Henrique Feijó Fialho

    2009-07-01

    Full Text Available Este trabalho objetivou avaliar o crescimento do camarão Farfantepenaeus subtilis submetido a diferentes regimes de fertilização usando fertilizantes orgânicos e inorgânicos. O desenho experimental consistiu de três tratamentos e três repetições: controle (CT – 3 mg L-1 de ureia e 0,3 mg L-1 de monoamônio fosfato; farelo de trigo (FT – 25 g m-2; farelo de soja (FS – 18,75 g m-2. Nove tanques de 500 L foram estocados com 16 camarões m-2 (≈ 2,7 g, os quais foram alimentados com ração comercial contendo 35% de proteína bruta. Quinzenalmente, a qualidade da água foi monitorada e amostras de camarões foram coletadas para avaliar o crescimento e reajustar a quantidade de ração. Durante o cultivo, a qualidade da água manteve-se adequada ao cultivo do camarão. Os dados de crescimento e sobrevivência demonstraram não haver diferença estatística (p > 0,05 entre os tratamentos. O crescimento médio e a sobrevivência foram de 0,44 g semana-1 e 75%, respectivamente. Portanto, os protocolos testados foram igualmente eficientes para o crescimento do F. subtilis e manutenção da qualidade da água.This work aimed to evaluate the growth of the shrimp Farfantepenaeus subtilis submitted to different fertilization regimes using organic and inorganic fertilizers. The experimental design consisted of three treatments in triplicate: control (CT – 3 mg L-1 of urea and 0.3 mg L-1 of monoammonium phosphate; wheat bran (FT – 25 g m-2; and soybean bran (FS – 18.75 g m-2. Nine 500 L fiber glass tanks were stocked with 16 shrimp m-2 (≈ 2.7 g. Animals were fed daily with pelleted feed (35% crude protein. Biweekly, water quality was monitored and shrimp samples were collected to evaluate growth and adjust the feed quantity. Water quality maintained adequate to shrimp culture during the experimental period. Growth results did not differ significantly (p > 0.05 among treatments. Mean growth rate and survival were 0.44 g week-1 and 75

  14. Enhancement of superoxide dismutase and catalase activity in juvenile brown shrimp, Farfantepenaeus californiensis (Holmes, 1900, fed β-1.3 glucan vitamin E, and β-carotene and infected with white spot syndrome virus Incremento de la actividad superóxido dismutasa y catalasa en juveniles de camarón café Farfantepenaeus californiensis (Holmes, 1900 alimentados con β-1,3 glucano vitamina E y β-caroteno e infectados con el virus de la mancha blanca

    Directory of Open Access Journals (Sweden)

    Rosario Pacheco

    2011-11-01

    Full Text Available The effect of dietary β-Ο-glucan, vitamin E, and β-carotene supplements in juvenile brown shrimp, Farfantepenaeus californiensis, inoculated with white spot syndrome virus (WSSV was evaluated. Groups of 30 organisms (weighing 1 ± 0.5 g were cultured in 60 L fiberglass tanks and fed daily with β-1.3-glucan (0.1%, vitamin E (0.01%, and β-carotene (0.01% for 23 days; the specimens were then inoculated with WSSV. The antioxidant activity of the enzymes superoxide dismutase (SOD and catalase (CAT were determined in the hepatopancreas and muscle at 0, 1, 6, 12, 24, and 48 h after inoculation. Shrimp fed with β-1.3-glucan, vitamin E, and β-carotene significantly increased SOD activity in the hepatopancreas and muscle at 12 and 24 h post-infection, respectively. Shrimp fed with vitamin E and β-1.3-glucan registered an increment in SOD activity from 12 to 48 h post-infection. Shrimp fed with β-carotene increased SOD activity before infection with WSSV, and shrimp fed with β-1.3-glucan and vitamin E increased CAT activity, also before infection. The CAT activity response in shrimp muscle increased with respect to the control group for all treatments tested from 1 to 6 h after inoculation with WSSV. The highest antioxidant response was registered in shrimp fed with vitamin E. Juvenile shrimp fed with vitamin E and later inoculated with WSSV registered 100% mortality at 72 h, but shrimp fed with β-Ο-glucan and β-carotene showed greater resistance to WSSV, with mortality at 144 h post-infection. This study demonstrated the capacity of juvenile Farfantepenaeus californiensis fed β-Ο-glucan, vitamin E, or β-carotene to increase the antioxidant response before and after viral infection.Se evaluó el efecto de β-1,3-glucano, vitamina E y β-caroteno en la dieta de juveniles de camarón café Farfantepenaeus californiensis inoculados con virus del síndrome de la mancha blanca (WSSV. Se colocaron grupos de 30 camarones (peso 1 ± 0,5 g en

  15. Utilização de probióticos e fertilização orgânica com melaço durante a fase de berçário do camarão-rosa Farfantepenaeus brasiliensis em sistema superintensivo sem renovação de água

    OpenAIRE

    Souza,Diego Moreira de

    2011-01-01

    Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Aqüicultura, Instituto de Oceanografia, 2011. O cultivo de camarões marinhos é uma das principais atividades econômicas desenvolvidas no ramo da aquicultura. Embora a carcinicultura brasileira seja desenvolvida com a espécie exótica Litopenaeus vannamei, espécies nativas como o Farfantepenaeus brasiliensis já demonstraram potencial para o cultivo. A aqüicultura expandiu-se o suficiente para ter implica...

  16. Natural diet of three species of shrimp in a tropical coastal lagoon

    Directory of Open Access Journals (Sweden)

    Albertoni Edélti Faria

    2003-01-01

    Full Text Available The gut content of 495 specimens of Farfantepenaeus brasiliensis, 131 of F. paulensis (Penaeidae and 102 of Macrobrachium acanthurus (Palaemonidae were analyzed to establish the composition of their diets F. brasiliensis had as the most important feeding items in its diet larvae of Chironomidae, Polychaeta and Heleobia australis (Mollusca. For F. paulensis, the most important items were the same as for F. brasiliensis, but the order of importance of H. australis and Polychaeta was inverted. M. acanthurus had detritus as the most important item, followed by Chironomidae larvae, Odonata nymphs, and fragments of the macroalgae Chara. The results showed that the three species were omnivorous, with a varied diet including both components of macrofauna of benthos and associated to the macroalgae Chara and plant fragments and detritus.

  17. Ten-year variations in population structure of pink-shrimp in a southwestern Atlantic Bay affected by highway construction

    Directory of Open Access Journals (Sweden)

    Felipe Freitas Jr

    2011-12-01

    Full Text Available OBJECTIVES: Population structures of Farfantepenaeus brasiliensis and F. paulensis, consisting mainly of juveniles, were evaluated during the construction of an expressway along a mangrove area. Estuarine regions in southern Brazil function as sites for reproduction, nursery and growth of a variety of organisms, including two of the most important species of shrimp for fisheries in the southwestern Atlantic. Shrimps were collected in Saco dos Limões creek, Baía-Sul, Florianópolis, State of Santa Catarina, four times a year, by day and night, between 1997 and 2006. Fluctuations in the abundances of shrimp appear to be related to their life cycles, with largest abundances in Summer and Spring, rather than to impacts promoted by dredging activities during the expressway construction.OBJETIVOS: A estrutura populacional de Farfantepenaeus brasiliensis e F. paulensis, consistindo principalmente de juvenis, foi avaliada durante a construção de uma via expressa ao longo de uma área de manguezais. Regiões estuarinas do sul do Brasil funcionam como locais de reprodução, berçários e de crescimento de uma variedade de organismos, incluindo duas das mais importantes espécies de camarões comerciais do Atlântico Sul Ocidental. Camarões foram coletados no Saco dos Limões, Baía Sul, Florianópolis, Estado de Santa Catarina, trimestralmente, de dia e de noite, entre 1997 e 2006. Flutuações em abundâncias de camarões podem estar relacionados aos seus ciclos de vida, com as maiores abundâncias no verão e primavera, ao invés de impactos promovidos pelas atividades de dragagem durante a construção da via expressa.

  18. Presença do vírus da síndrome da mancha branca em crustáceos decápodes silvestres em lagoas costeiras no Sul do Brasil

    Directory of Open Access Journals (Sweden)

    S.W. Costa

    2012-02-01

    Full Text Available A presença do vírus da síndrome da mancha branca (em inglês WSSV nas principais espécies de camarões, siris e caranguejos de cinco lagoas que recebem o efluente de fazendas afetadas pela enfermidade foi detectada por nested PCR, e inclusões virais nos camarões por histologia. Pela nested PCR encontrou-se a presença de WSSV em 13 de 16 (81,2% amostras de camarões da espécie Farfantepenaeus paulensis, em 13 de 14 (92,8% de Litopenaeus schmitti, em uma de duas de Farfantepenaeus brasiliensis (50%, em 13 de 15 (86,6% de siri da espécie Callinectes danae e em 11 de 12 (91,6% de Callinectes sapidus, e não foi detectada no caranguejo Chasmagnathus granulata em 10 amostras. Inclusões características de WSSV foram observadas em três amostras histológicas de 50 (6,0% no epitélio gástrico e cuticular e nas brânquias de dois exemplares de F. paulensis e um de L. schmitti. É o primeiro relato da presença de WSSV em camarões L. schmitti e no siri C. danae silvestres. As principais espécies de camarões e siris dos ambientes de entorno das fazendas foram contaminadas pelo WSSV, constituindo-se em vetores potenciais do vírus.

  19. Use of a mathematical model to estimate the impact of shrimp pen culture at Patos Lagoon estuary, Brazil.

    Science.gov (United States)

    Poersch, Luís H; Milach, Angela M; Cavalli, Ronaldo O; Wasielesky, Wilson; Möller, Osmar; Castello, Jorge P

    2014-09-01

    Ecological modeling has been used as a tool to estimate potential impacts caused by aquaculture to the surrounding environment. In this work, a mathematical model was applied to estimate the maximum amount of pink shrimp (Farfantepenaeus paulensis) culture units (3,100m2 pen enclosures) that could be installed at two shallow estuarine bays of Patos Lagoon (known as Coreia and Porto do Rei) with no significant effects on either water quality or viability of the culture system. To calibrate the model, information about the culture of Litopenaeus vannamei and F. paulensis as well as field data (influence of netting material, water current speed and nitrogen concentrations) were used. Under a bad scenario (water current velocity of 0.01m s-1 and a mesh clogging effect of 40%), it would be possible to install up to 29 pens at the Coreia bay, and 39 pens at the Porto do Rei bay. Results indicate that the model was useful in determining the maximum number of culture units that could be installed at these bays, and thus have the potential to become an important tool in the definition of environmental management strategies in relation to aquaculture development.

  20. Use of a mathematical model to estimate the impact of shrimp pen culture at Patos Lagoon estuary, Brazil

    Directory of Open Access Journals (Sweden)

    LUÍS H. POERSCH

    2014-09-01

    Full Text Available Ecological modeling has been used as a tool to estimate potential impacts caused by aquaculture to the surrounding environment. In this work, a mathematical model was applied to estimate the maximum amount of pink shrimp (Farfantepenaeus paulensis culture units (3,100m2 pen enclosures that could be installed at two shallow estuarine bays of Patos Lagoon (known as Coreia and Porto do Rei with no significant effects on either water quality or viability of the culture system. To calibrate the model, information about the culture of Litopenaeus vannamei and F. paulensis as well as field data (influence of netting material, water current speed and nitrogen concentrations were used. Under a bad scenario (water current velocity of 0.01m s–1 and a mesh clogging effect of 40%, it would be possible to install up to 29 pens at the Coreia bay, and 39 pens at the Porto do Rei bay. Results indicate that the model was useful in determining the maximum number of culture units that could be installed at these bays, and thus have the potential to become an important tool in the definition of environmental management strategies in relation to aquaculture development.

  1. Pink shrimp (P. brasiliensis and P. paulensis) residue: influence of extraction method on carotenoid concentration.

    Science.gov (United States)

    Mezzomo, Natália; Maestri, Bianca; dos Santos, Renata Lazzaris; Maraschin, Marcelo; Ferreira, Sandra R S

    2011-09-15

    The main residue from the shrimp processing is formed by head and carapace and represents from 40 to 50% (w/w) of the integral shrimp. The recovery of the carotenoid fraction from this residue stands for an alternative to increase its aggregated value. Therefore, the objective of this study was to use the pink shrimp waste as raw material to obtain carotenoid enriched extracts, evaluating different pre-treatments and extraction methods. The shrimp waste was supplied by a local public market (Florianópolis, SC, Brazil). The investigation of the different pre-treatments applied to the raw material shows that cooking associated with milling and drying produced the extract richest in carotenoid fraction. The extraction methods considered in this work were Soxhlet, maceration and ultrasound by means of different organic solvents and also a vegetable oil as solvent. The extracts were evaluated in terms of yield, carotenoid profile, total carotenoid content (TCC), UV-Visible scanning spectrophotometry and mid-Fourier transform infrared spectroscopy (FTIR). The results indicate that shrimp waste can provide carotenoid enriched extracts, particularly astaxanthin, in concentrations up to 252 μg(astaxanthin)g(extract)(-1). The most adequate solvents were acetone and hexane: isopropanol (50:50, v/v) used in the maceration procedure. The UV-Vis results revealed the presence of carotenoids and flavonoids in the extracts while the FTIR spectroscopy indicated the existence of fatty acids, proteins, and phenolics.

  2. Anticholinesterase effect of eserine (physostigmine in fish and crustacean species

    Directory of Open Access Journals (Sweden)

    José M. Monserrat

    2001-03-01

    Full Text Available The kinetic characteristic (Km of cholinesterase from the crab Chasmagnathus granulata, the shrimp Farfantepenaeus paulensis and the fish Odontesthes bonaeriensis were compared and correlated with the anticholinesterasic effect of eserine (physostigmine. For the crustaceans, the estimated Km values were about 5-8 times higher than that estimated for the fish (0.04 mM. In the crab and the shrimp, the concentration of eserine which inhibited 50% of cholinesterase activity (IC50 was estimated as 5.33x10-4 and 4.33x10-4 mM, respectively. In both cases, it was significantly higher (P As caraterísticas cinéticas (Km de colinesterases do caranguejo Chasmagnathus granulata, o camarão Farfantepenaeus paulensis e o peixe Odontesthes bonaeriensis foram comparadas e correlacionadas com os efeitos anticolinesterásicos da eserina (fisostigmina. Nos crustáceos, o valores estimados de Km foram aproximadamente 5-8 vezes maiores do que aquele estimado para a espécie de peixe (0.04 mM. No caranguejo e camarão, a concentração de eserina que inibiu 50% da atividade colinesterásica (CI50 foi estimada em 5.33x10-4 e 4.33x10-4 mM, respectivamente. Estes valores foram significativamente maiores (P < 0.05 que aquele estimado para as larvas de peixes (7.43x10-5 mM. Um valor de Km mais elevado poderia refletir uma menor afinidade da colinesterase pelo seu substrato natural, acetilcolina, ou análogos tais como inseticidas carbamatos e fosforados. Se a CI50 para eserina é considerada como um índice da susceptibilidade da enzima a inibição por inseticidas, logo a colinesterase de larvas de peixes poderiam ser uma ferramenta mais útil no monitoramento de inseticidas do que aquelas das espécies de crustáceos.

  3. Bioaccumulation of animal adenoviruses in the pink shrimp

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    Roger B. Luz

    2015-09-01

    Full Text Available Adenoviruses are among the most promising viral markers of fecal contamination. They are frequently found in the water, sediment and soil of regions impacted by human activity. Studies of the bioaccumulation of enteric viruses in shrimp are scarce. The cities located in the northern coast of the lake systems in Southern Brazil have high urbanization and intensive farming rates, and poor sewage collection and treatment. One hundred (n = 100 Farfantepenaeus paulensis pink-shrimp specimens and 48 water samples were collected from coastal lagoons between June 2012 and May 2013. Water samples were concentrated and the shrimp, mashed. After DNA extraction, samples were analyzed by real time polymerase chain reaction (qPCR in order to detect and quantify viral genomes. Thirty-five percent of shrimp samples were positive for contamination, predominantly by avian adenoviruses. A total of 91.7% of water samples contained adenoviruses DNA, with the human form being the most frequent. Our results provided evidence of significant bioaccumulation of adenoviruses in shrimp, showing the extent of the impact of fecal pollution on aquatic ecosystems.

  4. Bioaccumulation of animal adenoviruses in the pink shrimp.

    Science.gov (United States)

    Luz, Roger B; Staggemeier, Rodrigo; Fabres, Rafael B; Soliman, Mayra C; Souza, Fernanda G; Gonçalves, Raoni; Fausto, Ivone V; Rigotto, Caroline; Heinzelmann, Larissa S; Henzel, Andréia; Fleck, Juliane D; Spilki, Fernando R

    2015-01-01

    Adenoviruses are among the most promising viral markers of fecal contamination. They are frequently found in the water, sediment and soil of regions impacted by human activity. Studies of the bioaccumulation of enteric viruses in shrimp are scarce. The cities located in the northern coast of the lake systems in Southern Brazil have high urbanization and intensive farming rates, and poor sewage collection and treatment. One hundred (n = 100) Farfantepenaeus paulensis pink-shrimp specimens and 48 water samples were collected from coastal lagoons between June 2012 and May 2013. Water samples were concentrated and the shrimp, mashed. After DNA extraction, samples were analyzed by real time polymerase chain reaction (qPCR) in order to detect and quantify viral genomes. Thirty-five percent of shrimp samples were positive for contamination, predominantly by avian adenoviruses. A total of 91.7% of water samples contained adenoviruses DNA, with the human form being the most frequent. Our results provided evidence of significant bioaccumulation of adenoviruses in shrimp, showing the extent of the impact of fecal pollution on aquatic ecosystems.

  5. Caracterização da pesca artesanal no complexo estuarino-lagunar de Cananéia-Iguape, Estado de São Paulo, Brasil (1995-1996 Amateur fishery in the estuary-lagoon complex of Cananéia-Iguape, state of São Paulo, Brazil (1995-1996

    Directory of Open Access Journals (Sweden)

    Jocemar Tomasino Mendonça

    2001-05-01

    Full Text Available A pesca artesanal desenvolvida na região do Complexo Estuarino-lagunar de Cananéia-Iguape, litoral sul do Estado de São Paulo, Brasil, é analisada quanto a embarcações, artes de pesca e produção pesqueira, com base em dados coletados no período de 1995 a 1996. A frota artesanal é pouco motorizada, composta por pequenos barcos de madeira e dividida em duas atividades: pesca nas proximidades da praia e pesca dentro do estuário. A primeira é dirigida à captura do camarão-sete-barbas (Xiphopenaeus kroyeri, camarão-branco (Litopenaeus schimitti e peixes, utilizando “bateiras” com arrasto duplo e canoas com redes de emalhar e espinhel. A segunda atividade é dirigida à captura de peixes, juvenis de camarão-rosa (Farfantepenaeus paulensis e F. brasiliensis, utilizando-se embarcações motorizadas ou a remo. Dentro do estuário as artes de pesca utilizadas são o cerco-fixo, redes de emalhar, espinhel (horizontal e vertical e gerival. A principal arte é o cerco-fixo, sendo instaladas mais de 90 armadilhas, principalmente para a pesca da tainha (Mugil platanus. No inverno o cerco-fixo captura também outras espécies, como o parati (Mugil curema, robalo (Centropomus spp., corvina (Micropogonias furnieri e carapeba (Diapterus rhombeus. A contribuição da pesca artesanal local para o total desembarcado em Cananéia foi de 32% em 1995 e 10% em 1996. As principais espécies capturadas foram: parati, camarão-sete-barbas, pescada-foguete (Macrodon ancylodon, corvina e tainha, variando a ordem ao longo dos anos. Observou-se um declínio na produção ao longo de cada ano, sendo o primeiro semestre o período de melhores desembarquesAmateur fishing gear and methods, and fishing production in the Cananéia-Iguape lagoon-estuarine complex region, southernmost coast of the state of São Paulo (25oS; 48oW, Brazil, were analyzed during 1995 and 1996. Consisting mainly of small wooden boats, only a small part of the amateur fishing fleet

  6. Monitoring of carcinofauna abundance and diversity during eight years of expressway construction in Santa Catarina, Brazil Ocho años de monitoreo de la abundancia y diversidad de la fauna carcinológica durante la construcción de una carretera en Santa Catarina, Brasil

    Directory of Open Access Journals (Sweden)

    Felipe Freitas Junior

    2010-01-01

    Full Text Available Crustaceans are important in estuarine ecosystems, transferring energy to higher trophic levels and contributing to artisanal and industrial fisheries. This paper aims to evaluate the carcinofauna diversity and abundance in Saco dos Limões and how this changed when affected by dredging during the construction of an expressway through South Bay, Florianópolis, Santa Catarina, Brazil. Collections were made onboard a commercial fishing boat for three months, day and night, at six sampling sites from 1997 to 2006. The families Penaeidae and Portunidae were the most diverse in terms of taxa, with the largest species abundances. The dominant species were the shrimps Farfantepenaeus brasiliensis, F. paulensis, and Litopenaeus schmitti, and the crab Callinectes danae. The largest abundances were found in two areas, in the summer and at night. The diversity and equitability Índices showed similar patterns, with the highest values in autumn and winter. Acording to the Jaccard Index, the similarity of the crustacean composition was highest for the years 2005 and 2006 and lowest between 1997 and 2005. The structure of the carcinofauna changed over the years, with high mortalities during dredging operations followed by a recovery in the subsequent years. Our observations indicated that dredging did not have catastrophiçõeffects ñor did it produce long-term disturbances in the carcinofauna of the estuary. It is important to monitor natural resources in order to record the extent and limits of human impacts on the environment.Los crustáceos son importantes en el ecosistema estuarino, transfiriendo energía hacia los niveles tróficos más altos y contribuyendo a la pesca artesanal e industrial. El objetivo del artículo es evaluar la diversidad y abundancia de la fauna carcinológica de la región de Saco dos Limões y sus cambios bajo la influencia de las actividades de dragado durante la construcción de la carretera Bahía sur, Florianópolis, Santa

  7. Aspects of the biology of the Atlantic Midshipman, Porichthys porosissimus (Teleostei, Batrachoididae: an important by-catch species of shrimp trawling off southern Brazil

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    Marcelo Vianna

    2000-01-01

    Full Text Available Trawl fishing for pink shrimp (Farfantepenaeus brasiliensis and F. paulensis catches large quantities of by-catch fish, discarded due to their having no commercial vaue. As these species have rarely been studied, the impact of fisheries on these populations is not known. This contribution studies the biology of a species of no commercial value, the Atlantic midshipman Porichthys porosissimus. The last haul /Tom a commercial trawler, operating on the northern coast of São Paulo State and the southern coast of Rio de Janeiro State, was preserved (/Tom being discarded and identified at the species leveI. It was observed that this fishery affects the juvenile population which is intluenced by the seasonal variation of the water masses. Growth parameters were estimated: L∞ = 37.0 cm, K = 0.285 year-1. Instantaneous mortality coefficients were estimated: 2=2.14, M=0.63, F= 1.51, S= 11.8 and E=0.71. Considering the intensive activity of the shrimp trawl tleet operating in this area, the deleterious action of trawling is considered as of high impact. The stock management measures applied for pink shrimp are without effect regarding P. porosissimus. which has its spawning period before the closed season and its recruitment peak after it. The results show overfishing and the need to apply measures to reduce trawling action, such as adequate policies, introduction of selectivity devices and the creation of exclusion zones for trawl fishing.A pesca de arrasto para a captura do camarão-rosa (Fm:fantepenaeus brasi/iensis e F. paulensis captura grande quantidade de peixes considerados fauna acompanhante que são descartados por não possuírem valor comercial. Assim, pouco aparecem em trabalhos de biologia pesqueira com dados de desembarque, sendo a ação pesqueira sobre estas populações pouco conhecida. Neste estudo, um arrasto mensal de um barco de pesca foi desembarcado sem que nada do material capturado fosse descartado. Analisou-se Porichthys

  8. Distribuição diária das atividades comportamentais dos camarões marinhos Farfantepenaeus subtilis (Pérez Farfante, 1967) e Litopenaeus schmitti (Burkenroad, 1938) em condições laboratoriais

    OpenAIRE

    Medeiros, Melquieges Sousa de

    2008-01-01

    A aqüicultura marinha tem se destacado em todo o mundo, especialmente pelo cultivo de camarão. No Brasil, a introdução da espécie Litopenaeus vannamei contribuiu para o sucesso da atividade, embora existam algumas desvantagens associadas à introdução de uma espécie exótica, que estariam relacionadas ao aparecimento de novas enfermidades no ambiente, além do impacto ecológico sobre as espécies nativas. Uma necessidade apontada pelos diversos segmentos da carcinicultura é o incentivo à pesquisa...

  9. Abundancia y distribución de juveniles de Farfantepenaeus aztecus (Ives 1891), F. duorarum (Burkenroad 1939) y Litopenaeus setiferus (Linnaeus 1767) en la Laguna Madre, Tamaulipas, México

    OpenAIRE

    Alberto Ocaña-Luna; Gabriela Hernández-Batún; Marina Sánchez-Ramírez

    2008-01-01

    Se analizó la distribución y abundancia de los juveniles de camarones peneidos en Laguna Madre, en base a las recolectas realizadas en los meses de octubre (1997) y enero, mayo, julio (1998), con una red cónica de 50 cm de diámetro y 505 de apertura de malla, con un flujómetro adaptado a la misma. Además se tomaron datos de salinidad y temperatura superficial. Se realizó un análisis de varianza (ANOVA) y una prueba de rangos múltiples (SNK) para comparar las tallas entre las especies. La espe...

  10. Estudios sobre hongos tropicales. Algunas especies colectadas en Ecuador y Guatemala.

    OpenAIRE

    Calonge, F. D.; Moreno-Arroyo, B.; Gómez, J.

    2008-01-01

    [EN] Seven species are described in this article, among which three ofthem are worthy to stand out for their rarity in the world: Bovista cf. trachyspora, Radiigera paulensis and Scleroderma leptopodium. Notes on their taxonomy and chorology are also added.

  11. Burrowing behavior of penaeid shrimps

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Brown shrimp, Farfantepenaeus aztecus, and white shrimp, Litopenaeus setiferus, were held were held under natural light conditions before experiments. Experiments...

  12. Simulating environmental effects on brown shrimp production in the northern Gulf of Mexico

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Brown shrimp (Farfantepenaeus aztecus) are a commercially important fishery species of the northern Gulf of Mexico. Young shrimp settle in estuarine salt marsh...

  13. Morphology and phylogeny of Triadinium polyedricum (Pouchet) Dodge (Dinophyceae) from Korean coastal waters

    Science.gov (United States)

    Shin, Hyeon Ho; Li, Zhun; Kim, Eun Song; Youn, Joo Yeon; Jeon, Seul Gi; Oh, Seok Jin; Lim, Weol-Ae

    2016-12-01

    To identify features that can be used to differentiate Triadinium polyedricum from other related species, such as Fukuyoa paulensis and Alexandrium species, the detailed morphology and phylogeny of T. polyedricum collected from Korean coastal waters were investigated. The cells had a plate formula of Po, 3', 7″, 5‴, 1p and 2″″, which is consistent with morphological descriptions in previous reports. Large subunit ribosomal DNA sequences also revealed that T. polyedricum from Korean coastal waters is identical to previously recorded isolates. T. polyedricum is morphologically characterized by a ventral pore in the 1″ plate that is comparable to F. paulensis and Alexandrium species. This result indicates that the location and presence of this ventral pore seems suitable for differentiating T. polyedricum from other related species.

  14. Morphology and phylogeny of Triadinium polyedricum (Pouchet) Dodge (Dinophyceae) from Korean coastal waters

    Science.gov (United States)

    Shin, Hyeon Ho; Li, Zhun; Kim, Eun Song; Youn, Joo Yeon; Jeon, Seul Gi; Oh, Seok Jin; Lim, Weol-Ae

    2016-11-01

    To identify features that can be used to differentiate Triadinium polyedricum from other related species, such as Fukuyoa paulensis and Alexandrium species, the detailed morphology and phylogeny of T. polyedricum collected from Korean coastal waters were investigated. The cells had a plate formula of Po, 3', 7″, 5‴, 1p and 2″″, which is consistent with morphological descriptions in previous reports. Large subunit ribosomal DNA sequences also revealed that T. polyedricum from Korean coastal waters is identical to previously recorded isolates. T. polyedricum is morphologically characterized by a ventral pore in the 1″ plate that is comparable to F. paulensis and Alexandrium species. This result indicates that the location and presence of this ventral pore seems suitable for differentiating T. polyedricum from other related species.

  15. DEEP-SEA FISHERY IN THE COLOMBIAN CARIBBEAN SEA: MANAGEMENT AND CONSERVATION STRATEGIES FOR AN ECOSYSTEM APPROACH TO FISHERIES

    OpenAIRE

    Paramo, Jorge

    2011-01-01

    The aim of this research was to identify the potential of new deep-sea fisheries in the Colombian Caribbean Sea determining their biomass and spatial distribution in order to advice management and conservation strategies, based on ecosystem approach to fisheries management. First, I examine morphological characteristics of the shallow water pink shrimp Farfantepenaeus notialis to investigate stock differentiation, presenting biological data such as size at 50% sexual maturity. The data onF. n...

  16. Abundancia de juveniles de camarones peneidos comerciales en la zona norte de Laguna Madre, México Abundance of the commercial penaeid shrimp juveniles in the North zone of Laguna Madre, Mexico

    Directory of Open Access Journals (Sweden)

    Armando T. Wakida-Kusunoki

    2008-03-01

    Full Text Available Se tomaron muestras mensuales de agosto del 2005 a noviembre del 2006, para analizar los cambios de abundancia de juveniles de camarones peneidos comerciales en la parte norte de Laguna Madre, Tamaulipas. En cada una de las nueve estaciones de muestreo se realizó un arrastre nocturno, utilizando una red tipo chinchorro, de tamaño de malla de 1.25 cm y seis metros de longitud de relinga inferior. Se observaron tres especies de peneidos comerciales y cada una de ellas tuvo sus valores más altos de abundancia en diferentes periodos del año. El camarón café, Farfantepenaeus aztecus fue más abundante de abril-mayo; el camarón rosado, Farfantepenaeus dourarum en diciembre-enero y el camarón blanco, Litopenaeus setiferus en julio y septiembre. Estos resultados muestran que estas especies tienen un uso temporal diferencial en Laguna Madre, Tamaulipas.Monthly samplings were carried out during August, 2005 to November, 2006 to analizing the changes of the abundance of commercial juvenile penaeid shrimps in the North part of Laguna Madre, Tamaulipas. In every nine points a night trawl were carried out using a seine net of mesh size of 1.25 cm and 6 m length of bottom rope. Three commercial penaeid shrimp species were found and each one presented high abundance values for different periods of the year. Brown shrimp, Farfantepenaeus aztecus, in April-May period; pink shrimp, Farfantepenaeus dourarum, in December-January, and the white shrimp, Litopenaeus setiferus in July and September. These results showed that different species presented a differential temporal use in Laguna Madre.

  17. Karyotype characterization and nucleolar organizer regions of marsupial species (Didelphidae from areas of Cerrado and Atlantic Forest in Brazil

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    Núbia P. Pereira

    2008-01-01

    Full Text Available The karyotypes of 23 specimens belonging to 16 species from nine genera of Brazilian marsupials (family Didelphidae were studied. The animals were collected in eight localities of Cerrado or Atlantic Forest biomes in the states of Goiás, Tocantins and São Paulo. The karyotypes were analyzed after conventional Giemsa staining and silver staining of the nucleolus organizer regions (Ag-NORs. New karyotypic data were obtained for Gracilinanus microtarsus (2n = 14, FN = 24, Marmosops paulensis (2n = 14, FN = 24 , Micoreus paraguayanus (2n = 14, FN = 20 and Monodelphis rubida (2n = 18, FN = 32 and are discussed in detail. The karyotypes of G. microtarsus , M. paulensis and M. paraguayanus include three large pairs of submetacentrics (pairs 1, 2 and 3 and a medium-sized metacentric or submetacentric pair 4. Pairs 5 and 6 are small submetacentrics in G. microtarsus and M. paulensis and acrocentrics in M. paraguayanus . M. paulensis presented a single Ag-NOR in pair 6 (6p6p, while M. paraguayanus exhibited multiple Ag-NORs in pairs 5 and 6 (5pq5pq6p6p. There was variation in size and morphology of the sex chromosomes among these species. Monodelphis rubida presented a karyotype with 2n = 18 and FN = 32 composed of a large submetacentric pair 1, a medium-sized metacentric pair 2 and six pairs of submetacentrics (pairs 3 through 8. The X was a small acrocentric and the Y was dot-like. A single Ag-NOR bearing pair (5p5p characterized M. rubida. Relevant karyotypic information was obtained for 19 specimens belonging to 12 species collected in areas sampled for the first time [ Caluromys lanatus and C. philander (2n = 14, FN = 20, Gracilinanus emiliae (2n = 14, FN = 24, Marmosa murina , Metachirus nudicaudatus and Micoureus demerarae (2n = 14, FN = 20, Monodelphis americana (2n = 18, FN = 32 and M. domestica (2n = 18, FN = 20, and Didelphis marsupialis, Philander frenata, P. opossum and P. sp (2n = 22, FN = 20]. Although the karyotypes were relatively

  18. Molecular Identification of Gambierdiscus and Fukuyoa (Dinophyceae from Environmental Samples

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    Kirsty F. Smith

    2017-08-01

    Full Text Available Ciguatera Fish Poisoning (CFP is increasing across the Pacific and the distribution of the causative dinoflagellates appears to be expanding. Subtle differences in thecal plate morphology are used to distinguish dinoflagellate species, which are difficult to determine using light microscopy. For these reasons we sought to develop a Quantitative PCR assay that would detect all species from both Gambierdiscus and Fukuyoa genera in order to rapidly screen environmental samples for potentially toxic species. Additionally, a specific assay for F. paulensis was developed as this species is of concern in New Zealand coastal waters. Using the assays we analyzed 31 samples from three locations around New Zealand and the Kingdom of Tonga. Fourteen samples in total were positive for Gambierdiscus/Fukuyoa and two samples were also positive using the F. paulensis assay. Samples from the Kermadec Islands were further characterized using high-throughput sequencing metabarcoding. The majority of reads corresponded to Gambierdiscus species with three species identified at all sites (G. australes, G. honu and G. polynesiensis. This is the first confirmed identification of G. polynesiensis, a known ciguatoxin producer, in New Zealand waters. Other known toxin-producing genera were also detected, included Alexandrium, Amphidinium, Azadinium, Dinophysis, Ostreopsis, and Prorocentrum.

  19. The Complete Sequence of Mitochondrial COⅡ Gene of Fenneropenaeus chinensis and Its Applicability as a Marker for Phylogenetic Analysis

    Institute of Scientific and Technical Information of China (English)

    YU Shanshan; KONG Xiaoyu; LI Yulong; XU Hui

    2007-01-01

    The complete mitochondrial cytochrome oxidase subunit Ⅱ (COⅡ) gene of Penaeinae shrimp Fenneropenaeus chinensis was cloned and sequenced. The gene is 688 bp in length and codes for 229 amino acids. It shows 83.2%, 87.0% and 83.8% sequence similarity to Marsupenaeus Japonicus, Penaeus monodon and Farfantepenaeus notialis, respectively. The A+T content of the whole gene and that at the third position of codons are 64.7% and 78.2%, respectively. The phylogenetic relationship between F. chinensis and three other species representing genera Farfanatepenaeus, Marsupenaeus and Penaeus was analyzed. Results showed that the genetic distances among the four taxa ranged from 0.144 0 to 0.200 5, exceeding those estimated with COⅠ and partial 16S rRNA gene sequences among Marsupenaeus, Litopenaeus and Melicertus, and being therefore larger than the value among subgenera. It has been suggested that the COⅡ gene has a faster evolutionary rate than that of the COⅠ gene and partial 16S rRNA gene and could be used for phylogenetic analysis at genus or species level. The results of the present study indicated that Farfantepenaeus, Fenneropenaeus, Marsupenaeus and Penaeus are at a higher phylogenetic level than subgenus, which supports the opinion of the elevation of phylogenetic status of the four subgenera to genus level.

  20. Distribuição e ecologia dos decapoda numa área estuarina de Ubatuba (SP

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    Jorge de Abreu

    1980-12-01

    Full Text Available Benthic macro fauna (Decapoda was sampled by beam trawl at 6 stations in Bay of Fortaleza and adjacents Escuro e Claro rivers (São Paulo, Ubatuba, Brasil. Samples were taken monthly during 1973-1974. Diversity was high in muddy sand sites of Bay of Fortaleza and low at very shallow stations located in the rivers, where the effects of extreme fluctuations of salinity were evident. The changes in species composition appeared to correspond most clearly to differences in salinity. The total number of species of decapods collected in the areas was 27 (14 species of Natantia and 13 of Reptantia. Juveniles of Penaeus brasiiiensis and Penaeus paulensis reach the rivers. Callinectes danae live in the Bay and in the rivers. Xiphopeneus kroyeri is a specie who inhabit the Bay of Fortaleza in high populational density.

  1. [Feeding habits and trophic ecology of the fish Lutjanus griseus (Pisces: Lutjanidae) associated with submerged vegetation in Laguna de Términos, Campeche, Mexico].

    Science.gov (United States)

    Guevara, Emma; Alvarez, Hernán; Mascaró, Maite; Rosas, Carlos; Sánchez, Alberto

    2007-01-01

    In Campeche, Mexico, the Laguna de Términos has Thalassia testudinum beds inhabited by the grey snapper, Lutjanus griseus (Linnaeus 1758). Along one year, we collected 994 individuals and 672 had food in their stomachs; we recorded number, weight, and frequency oftrophic groups, and the index of relative importance. Dominant food components were Farfantepenaeus duorarum and Palemonetes octaviae, Eucinostomus gula (Cuvier 1830) and Libinia dubia. Salinity and temperature were related to the number of individuals collected and with greater fish consumption by large L. griseus. The trophic niche breadth index was calculated for six size-classes of fish. The smallest and the largest fish had the lowest index values, whereas medium-size snappers had higher values. This snapper has a preference for habitats with submerged vegetation. The percentage of fish with food in their stomachs was higher during dark hours, providing evidence of the nocturnal habits of this fish.

  2. [Exploitation of the shrimp trawl fishery in the period 1991-1999 at the Gulf of Nicoya, Costa Rica].

    Science.gov (United States)

    Tabash Blanco, Farid A

    2007-03-01

    In Costa Rica, the Gulf of Nicoya shrimp fishery originated in 1952 and represented one of the most important economic activities in the region. Nevertheless, overfishery reduced the captured volumes to levels that prevent this commercial activity. I analyzed official fishery statistics between 1991 and 1999. These species involved are: two species of white shrimp, (Litopenaeus occidentalis and L. stylirostris), the "titi" shrimp (Xiphopenaeus riveti), the brown shrimp (Farfantepenaeus californiensis), the "pinki" shrimp (F. brevirostris) and the "fidel" shrimp (Solenocera agassizi). All the species reached the Maximum Sustainable Yield in the decades of 1970 and 1980 and are now found at over-exploitation levels. I recommend that this shrimp trawl fishery be completely closed down.

  3. New Fisheries-related data from the Mediterranean Sea (April 2014

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    K. STERGIOU

    2013-12-01

    Full Text Available As part of its policy, Mediterranean Marine Science started from 2014 to publish a new series of collective article with fisheries-related data from the Mediterranean Sea. In this first collective article we present length frequencies and weight-length relationships for the northern brown shrimp Farfantepenaeus aztecus in the eastern Mediterranean, length-weight relationships for 10 fish species in the North Aegean Sea, the feeding habits for 11 sparid fishes in the North Aegean Sea, a review of the existing literature on the feeding and reproduction of common carp Cyprinus carpio in Anatolia (Turkey and mouth dimensions and the relationships between mouth area and length for seven freshwater fishes from Lake Volvi (Northern Greece.

  4. Conservação de sementes de ipê Conservation of "ipê" seeds

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    Jocely Andreuccetti Maeda

    1984-01-01

    Full Text Available Sementes de algumas espécies de ipê foram submetidas a diferentes temperaturas de armazenamento, determinando-se a sua porcentagem de germinação a cada quarenta dias, por um período de trinta meses. Nas condições fornecidas de 10 ºC, 29 ºC e 30 ºC em embalagem hermeticamente fechada, e em saco de papel, a condições ambienteis foram avaliadas as seguintes espécies: Tabebuia avellanedae var. paulensis Tol., Tabebuia chrysotricha (Mart. ex-DC. Standley, Tabebuia impetiginosa (Mart. Standley, Tabebuia rosea (Bertol. DC. e Tabebuia heptaphylla (Vell. Tol. Dentre as condições de armazenamento, o tratamento a 10ºC em vidro hermético foi o que manteve a viabilidade da semente por maior tempo, sendo 20 °C também em vidro hermético o segundo melhor resultado. A germinação das sementes armazenadas em saco de papel a temperatura ambiente foi melhor do que a das que foram armazenadas em vidro hermético a 30 °C, sendo esta a pior condição de armazenagem. A comparação entre as espécies mostrou que Tabebuia heptaphylla, apresenta, além de sementes de maior longevidade, maior resistência às condições adversas de armazenamento.Seeds of some species of "ipê" were stored at different temperatures and the germination percentage was determined at forty-day intervals during thirty months. Seeds were subjected to the following conditions: storage in sealed flasks at 10ºC, 20ºC and 30ºC, and in paper bags at room temperature. The following species were evaluated: Tabebuia avellanedae var. paulensis Tol., Tabebuia chrysotricha (Mart. ex DC. Standley, Tabebuia impetiginosa (Mart. Standley, Tabebuia rosea (Bertol. DC. e Tabebuia heptaphylla (Vell. Tol. Among the treatments studied, storing seeds in sealed flasks at 10°C maintained seed viability for the longest period of time. The second best result was obtained when seeds were kept in sealed flasks at 20ºC. The germination of seeds stored in paper bags at room temperature was higher

  5. Anatomia do escapo floral de espécies brasileiras de Paepalanthus subgênero Platycaulon (Eriocaulaceae Anatomy of the inflorescence scape of Brazilian species of the Paepalanthus subgenus Platycaulon (Eriocaulaceae

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    Vera Lucia Scatena

    1998-08-01

    Full Text Available Foi estudada a anatomia dos escapos de 17 espécies de Paepalanthus subgênero Platycaulon, sendo 10 da sect. Divisi e sete da sect. Conferti. O trabalho foi realizado para caracterizar anatomicamente os escapos. como contribuição para o entendimento do grupo, uma vez que. morfologicamente, esse é o caráter laxonômico mais importante. Procurou-se, também, confirmar ou não o reconhecimento das duas seções dentro do subgênero. Para os estudos anatômicos utilizou-se material proveniente do Brasil, obtido de exsicatas de diferentes herbários e/ou coletado na Serra do Cipó, MG. Neste trabalho observou-se que Paepalanthus subg. Platycaulon é caracterizado morfologicamente por apresentar escapos pluricapitulados no ápice. Anatomicamente, as espécies estudadas da sect. Divisi apresentam escapos com vários cilindros vasculares, na região mediana e, ainda apresentam, em Paepalanthus vellozioides e P. spixianus, feixes vasculares corticais, características únicas na família. Diferentemente, as espécies avaliadas da sect. Conferti apresentam escapos com cilindro vascular único na região mediana, padrão análogo ao das demais Eriocaulaccae, e ainda apresentam, em Paepalanthus itatiaiensis, P. planifolius e P. paulensis, feixes vasculares medulares, que até então não haviam sido referidos para a família.The scape anatomy of 17 taxa of Paepalanthus subgenus Platycaylon were studied, being 10 taxa of sect. Divisi and seven of sect. Conferti. The study was carried out to see whether scape morphology and anatomy provide valid taxonomic characters at the subgeneric level in Paepalanthus and to lest a proposal to recognize two sections within Paepalanthus subgenus Platycaylon: sect. Divisi and sect. Conferti. The material for anatomical study was collected in Brazil, partly from herbarium specimens and partly from fresh material collected in the field, from the Serra do Cipó. Minas Gerais State. In this work, we observe that

  6. Registros novos e adicionais de teleósteos marinhos na costa brasileira

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    Rodrigo Antunes Caires

    2008-01-01

    Full Text Available São apresentadas novas informações sobre a distribuição geográfica de algumas espécies de peixes teleósteos que ocorrem na costa brasileira, incluindo duas espécies que nunca haviam sido registradas em nossas águas. Os serranídeos Pseudogramma gregoryi (assinalado da Flórida à Venezuela e Plectranthias garrupellus (registrado da Carolina do Norte ao Caribe foram encontrados, respectivamente, na costa do Ceará e na costa sudeste-sul do Brasil. São aqui mencionados e discutidos os dois primeiros registros do gênero Caristius (Caristiidae no Brasil, bem como os primeiros registros na costa sudeste-sul do Brasil das espécies Enchelycore carychroa (Muraenidae, e Chilomycterus antillarum (Diodontidae, e da espécie Neobythites brasiliensis(Bythitidae no nordeste do Brasil. É também assinalada a ocorrência mais setentrional do pargo Calamus mu (Sparidae, uma espécie até então circunscrita à região entre o Espírito Santo e São Paulo, e são discutidos os registros adicionais de Bascanichthys paulensis (Ophichthidae, Nezumia aequalis (Macrouridae, Antigonia combatia (Caproidae e Notolycodes schmidti (Zoarcidae na costa brasileira.New data of the geographical distribution of several species of teleost fishes assigned to the Brazilian coast, including some species never previously recorded, are presented. The serranids Pseudogramma gregoryi (recorded from Florida to Venezuela, and Plectranthias garrupellus (recorded from North Carolina to Caribbean Sea were found, respectively, in coast of Ceará and in southeastern and southern Brazilian coast. The two sole records the family Caristiidae in Brazilian coast are mentioned and discussed, and are given herein the first accounts of the species Enchelycore carychroa (Muraenidae and Chilomycterus antillarum (Diodontidae from southeastern Brazilian coast, and of Neobythites brasiliensis (Bythitidae from northeastern Brazilian coast. We have also discussed the northernmost occurrence of

  7. Permanent Genetic Resources added to Molecular Ecology Resources Database 1 May 2009-31 July 2009.

    Science.gov (United States)

    Almany, Glenn R; DE Arruda, Maurício P; Arthofer, Wolfgang; Atallah, Z K; Beissinger, Steven R; Berumen, Michael L; Bogdanowicz, S M; Brown, S D; Bruford, Michael W; Burdine, C; Busch, Jeremiah W; Campbell, Nathan R; Carey, D; Carstens, Bryan C; Chu, K H; Cubeta, Marc A; Cuda, J P; Cui, Zhaoxia; Datnoff, L E; Dávila, J A; Davis, Emily S; Davis, R M; Diekmann, Onno E; Eizirik, Eduardo; Fargallo, J A; Fernandes, Fabiano; Fukuda, Hideo; Gale, L R; Gallagher, Elizabeth; Gao, Yongqiang; Girard, Philippe; Godhe, Anna; Gonçalves, Evonnildo C; Gouveia, Licinia; Grajczyk, Amber M; Grose, M J; Gu, Zhifeng; Halldén, Christer; Härnström, Karolina; Hemmingsen, Amanda H; Holmes, Gerald; Huang, C H; Huang, Chuan-Chin; Hudman, S P; Jones, Geoffrey P; Kanetis, Loukas; Karunasagar, Iddya; Karunasagar, Indrani; Keyghobadi, Nusha; Klosterman, S J; Klug, Page E; Koch, J; Koopman, Margaret M; Köppler, Kirsten; Koshimizu, Eriko; Krumböck, Susanne; Kubisiak, T; Landis, J B; Lasta, Mario L; Lee, Chow-Yang; Li, Qianqian; Li, Shou-Hsien; Lin, Rong-Chien; Liu, M; Liu, Na; Liu, W C; Liu, Yuan; Loiseau, A; Luan, Weisha; Maruthachalam, K K; McCormick, Helen M; Mellick, Rohan; Monnahan, P J; Morielle-Versute, Eliana; Murray, Tomás E; Narum, Shawn R; Neufeld, Katie; De Nova, P J G; Ojiambo, Peter S; Okamoto, Nobuaki; Othman, Ahmad Sofiman; Overholt, W A; Pardini, Renata; Paterson, Ian G; Patty, Olivia A; Paxton, Robert J; Planes, Serge; Porter, Carolyn; Pratchett, Morgan S; Püttker, Thomas; Rasic, Gordana; Rasool, Bilal; Rey, O; Riegler, Markus; Riehl, C; Roberts, John M K; Roberts, P D; Rochel, Elisabeth; Roe, Kevin J; Rossetto, Maurizio; Ruzzante, Daniel E; Sakamoto, Takashi; Saravanan, V; Sarturi, Cladinara Roberts; Schmidt, Anke; Schneider, Maria Paula Cruz; Schuler, Hannes; Serb, Jeanne M; Serrão, Ester T A; Shi, Yaohua; Silva, Artur; Sin, Y W; Sommer, Simone; Stauffer, Christian; Strüssmann, Carlos Augusto; Subbarao, K V; Syms, Craig; Tan, Feng; Tejedor, Eugenio Daniel; Thorrold, Simon R; Trigiano, Robert N; Trucco, María I; Tsuchiya-Jerep, Mirian Tieko Nunes; Vergara, P; Van De Vliet, Mirjam S; Wadl, Phillip A; Wang, Aimin; Wang, Hongxia; Wang, R X; Wang, Xinwang; Wang, Yan; Weeks, Andrew R; Wei, Fuwen; Werner, William J; Wiley, E O; Williams, D A; Wilkins, Richard J; Wisely, Samantha M; With, Kimberly A; Wu, Danhua; Yao, Cheng-Te; Yau, Cynthia; Yeap, Beng-Keok; Zhai, Bao-Ping; Zhan, Xiangjiang; Zhang, Guo-Yan; Zhang, S Y; Zhao, Ru; Zhu, Lifeng

    2009-11-01

    This article documents the addition of 512 microsatellite marker loci and nine pairs of Single Nucleotide Polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Alcippe morrisonia morrisonia, Bashania fangiana, Bashania fargesii, Chaetodon vagabundus, Colletes floralis, Coluber constrictor flaviventris, Coptotermes gestroi, Crotophaga major, Cyprinella lutrensis, Danaus plexippus, Fagus grandifolia, Falco tinnunculus, Fletcherimyia fletcheri, Hydrilla verticillata, Laterallus jamaicensis coturniculus, Leavenworthia alabamica, Marmosops incanus, Miichthys miiuy, Nasua nasua, Noturus exilis, Odontesthes bonariensis, Quadrula fragosa, Pinctada maxima, Pseudaletia separata, Pseudoperonospora cubensis, Podocarpus elatus, Portunus trituberculatus, Rhagoletis cerasi, Rhinella schneideri, Sarracenia alata, Skeletonema marinoi, Sminthurus viridis, Syngnathus abaster, Uroteuthis (Photololigo) chinensis, Verticillium dahliae, Wasmannia auropunctata, and Zygochlamys patagonica. These loci were cross-tested on the following species: Chaetodon baronessa, Falco columbarius, Falco eleonorae, Falco naumanni, Falco peregrinus, Falco subbuteo, Didelphis aurita, Gracilinanus microtarsus, Marmosops paulensis, Monodelphis Americana, Odontesthes hatcheri, Podocarpus grayi, Podocarpus lawrencei, Podocarpus smithii, Portunus pelagicus, Syngnathus acus, Syngnathus typhle,Uroteuthis (Photololigo) edulis, Uroteuthis (Photololigo) duvauceli and Verticillium albo-atrum. This article also documents the addition of nine sequencing primer pairs and sixteen allele specific primers or probes for Oncorhynchus mykiss and Oncorhynchus tshawytscha; these primers and assays were cross-tested in both species.

  8. The non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with notes on their life-cycles: an illustrated guide.

    Science.gov (United States)

    Gravili, Cinzia; De Vito, Doris; Di Camillo, Cristina Gioia; Martell, Luis; Piraino, Stefano; Boero, Ferdinando

    2015-01-15

    The majority of Hydrozoa is represented by not readily noticeable, small species. In recent decades, however, taxonomic knowledge of the group has increased worldwide, with a significant number of investigations focused on the Mediterranean Sea. Over more than two decades, 115 species of hydrozoans were recorded from coastal waters along nearly 300 km of the Salento Peninsula (Apulia, Italy). For each species, records from different collections were merged into single sheets of a general database. For each species, the following information is reported: description, cnidome, biology, occurrence in Salento, worldwide distribution, and bibliography. Descriptions refer to the benthic hydroid stage and, when present, also to the planktonic medusa stage. The 115 species of Hydrozoa, recorded along the Salento coastline, represent 25% of the Mediterranean Hydrozoa fauna (totaling 461 species), and nearly 3% of 3,702 world's known species covered in a recent monograph. Four species are non-indigenous, three of them with invasive behavior (Clytia hummelincki, Clytia linearis, and Eudendrium carneum), and one species now very common (Eudendrium merulum) in Salento. The complete life cycle of Clytia paulensis (Vanhöffen, 1910) is described for the first time.

  9. Invertebrados cavernícolas da porção meridional da província espeleológica do Vale do Ribeira, sul do Brasil Cavernicolous invertebrate from south speleological province of the Ribeira Valley, south Brazil

    Directory of Open Access Journals (Sweden)

    Ricardo Pinto-da-Rocha

    1993-01-01

    Full Text Available From 1986 to 1992, I surveyed the invertebrate fauna of twelve limestone caves from South Ribeira Valley (State of Paraná, Brazil. Associated to walls in the entrace zone live Enoploctenus and Blechroscelis spiders, Goniosoma opilionids, Strinalia crickets, Latebraria amphipyroides moths, and Culicidae and Sciaridae dipterans. In aphotic zone, occur Plato spiders, Daguerreia inermis opilionids, Pseudonannolene strinatii diplopods, Smicridea caddisflies and the aquatic crustacean Aegla paulensis. I found in both zones Ctenus fasciatus spiders. Paronella collembolans, Zelurus travassosi heteropterans, Cholevidae and Anthribidae beetles, Phoridae dipterans and Braconidae wasps. One of the most important energy sources in these caves is the hematophagous bat guano. Associated to the guano piles there is a fauna composed by psedoscorpiones, acarians, Katantodesmus diplopods, Acherontides and Paronella collembolans, Dissochaetus beetles and Phoridae dipterans. The cave fauna studied is similar to that Ribeira Valley of the State of São Paulo. The most expressive difference is the absence of some taxa very common in São Paulo caves, such as the Oniscidae and Styloniscidae isopods, Cryptodesmidae and Chelodesmidae diplopods. Endecous crickets, Tricommatidae harvestmen, Calamoceratidae caddisflies and Neoditomyia Keroplatidae dipterans.

  10. The invasion of five alien species in the Delta do Parnaíba Environmental Protection Area, Northeastern Brazil.

    Science.gov (United States)

    Loebmann, Daniel; Mai, Ana Cecília G; Lee, James T

    2010-09-01

    Marine biological invasions have been regarded as one of the major causes of native biodiversity loss, with shipping and aquaculture being the leading contributors for the introductions of alien species in aquatic ecosystems. In the present study, five aquatic alien species (one mollusk, three crustaceans and one fish species) were detected during dives, shore searches and from the fisheries on the coast of the Delta do Parnaíba Environmental Protection Area, in the States of Piauí and Maranhão, Northeastern Brazil. The species were the bicolor purse-oyster Isognomon bicolor, the whiteleg shrimp Litopenaeus vannamei, the giant river prawn Macrobrachium rosenbergii, the Indo-Pacific swimming crab Charybdis hellerii and, the muzzled blenny Omobranchus punctatus. Ballast water (I. bicolor, C. hellerii, and O. punctatus) and aquaculture activities (L. vannamei and M. rosenbergii) in adjacent areas are the most likely vectors of introduction. All exotic species found have potential impact risks to the environment because they are able to compete against native species for resources (food and habitat). Isognomon bicolor share the same habitat and food items with the native bivalve species of mussels and barnacles. Litopenaeus vannamei share the same habitat and food items with the native penaeids such as the pinkspot shrimp Farfantepenaeus brasiliensis, the Southern brown shrimp Farfantepenaeus subtilis, and the Southern white shrimp Litopenaeus schmitti, and in the past few years L. vannamei was responsible for a viral epidemics in the cultivation tanks that could be transmitted to native penaeid shrimps. Charybdis hellerii is also able to cause impacts on the local fisheries as the species can decrease the populations of native portunid crabs which are commercialized in the studied region. Macrobrachium rosenbergii may be sharing natural resources with the Amazon River prawn Macrobrachium amazonicum. Omobranchus punctatus shares habit with the native redlip blenny

  11. Use of intertidal areas by shrimps (Decapoda in a brazilian Amazon estuary

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    HEBERT A. SAMPAIO

    2014-03-01

    Full Text Available The present work investigated the occupation and the correlation of the shrimp abundance in relation to environmental variables in different habitats (mangroves, salt marshes and rocky outcrops in an Amazon estuary. The collections were made in August and November 2009, at low syzygy tide on Areuá Beach, situated in the Extractive Reserve of Mãe Grande de Curuçá, Pará, Brazil totaling 20 pools. In each environment, we recorded the physical-chemical factors (pH, salinity, and temperature and measured the area (m2 and volume (m3 of every pool through bathymetry. The average pH, salinity, temperature, area and volume of tide pools were 8.75 (± 0.8 standard deviation, 35.45 (± 3, 29.49 °C (± 2.32, 27.41 m2 (± 41.18, and 5.19 m3 (± 8.01, respectively. We caught a total of 4,871 shrimps, distributed in three families and four species: Farfantepenaeus subtilis (98.36% (marine followed by Alpheus pontederiae (0.76% (estuarine, Macrobrachium surinamicum (0.45% and Macrobrachium amazonicum (0.43% predominantly freshwater. The species F. subtilis and A. pontederiae occurred in the three habitats, whereas M. surinamicum occurred in salt marsh and rocky outcrop and M. amazonicum only in marisma. Temperature and pH were the most important environmental descriptors that significantly affected the density and biomass of shrimps.

  12. Use of intertidal areas by shrimps (Decapoda) in a Brazilian Amazon estuary.

    Science.gov (United States)

    Sampaio, Hebert A; Martinelli-Lemos, Jussara M

    2014-03-01

    The present work investigated the occupation and the correlation of the shrimp abundance in relation to environmental variables in different habitats (mangroves, salt marshes and rocky outcrops) in an Amazon estuary. The collections were made in August and November 2009, at low syzygy tide on Areuá Beach, situated in the Extractive Reserve of Mãe Grande de Curuçá, Pará, Brazil totaling 20 pools. In each environment, we recorded the physical-chemical factors (pH, salinity, and temperature) and measured the area (m2) and volume (m3) of every pool through bathymetry. The average pH, salinity, temperature, area and volume of tide pools were 8.75 (± 0.8 standard deviation), 35.45 (± 3), 29.49 °C (± 2.32), 27.41 m2 (± 41.18), and 5.19 m3 (± 8.01), respectively. We caught a total of 4,871 shrimps, distributed in three families and four species: Farfantepenaeus subtilis (98.36%) (marine) followed by Alpheus pontederiae (0.76%) (estuarine), Macrobrachium surinamicum (0.45%) and Macrobrachium amazonicum (0.43%) predominantly freshwater. The species F. subtilis and A. pontederiae occurred in the three habitats, whereas M. surinamicum occurred in salt marsh and rocky outcrop and M. amazonicum only in marisma. Temperature and pH were the most important environmental descriptors that significantly affected the density and biomass of shrimps.

  13. The areal extent of brown shrimp habitat suitability in Mobile Bay, Alabama, USA: Targeting vegetated habitat restoration

    Science.gov (United States)

    Smith, L.M.; Nestlerode, J.A.; Harwell, L.C.; Bourgeois, P.

    2010-01-01

    The availability of wetlands and shallow water habitats significantly influences Gulf of Mexico (GOM) penaeid shrimp fishery productivity. However, the GOM region has the highest rate of wetland loss in the USA. Protection and management of these vital GOM habitats are critical to sustainable shrimp fisheries. Brown shrimp (Farfantepenaeus aztecus) are a major component of GOM fisheries. We present an approach for estimating the areal extent of suitable habitat for post-larval and juvenile brown shrimp in Mobile Bay, Alabama, using an existing habitat suitability index model for the northern GOM calculated from probabilistic survey of water quality and sediment data, land cover data, and submerged aquatic vegetation coverages. This estuarine scale approach is intended to support targeted protection and restoration of these habitats. These analyses indicate that approximately 60% of the area of Mobile Bay is categorized as suitable to near optimal for post-larval and juvenile shrimp and 38% of the area is marginally to minimally suitable. We identify potential units within Mobile Bay for targeted restoration to improve habitat suitability. ?? 2010 Springer Science+Business Media B.V.

  14. Using self-organizing maps to determine observation threshold limit predictions in highly variant data

    Science.gov (United States)

    Paganoni, C.A.; Chang, K.C.; Robblee, M.B.

    2006-01-01

    A significant data quality challenge for highly variant systems surrounds the limited ability to quantify operationally reasonable limits on the data elements being collected and provide reasonable threshold predictions. In many instances, the number of influences that drive a resulting value or operational range is too large to enable physical sampling for each influencer, or is too complicated to accurately model in an explicit simulation. An alternative method to determine reasonable observation thresholds is to employ an automation algorithm that would emulate a human analyst visually inspecting data for limits. Using the visualization technique of self-organizing maps (SOM) on data having poorly understood relationships, a methodology for determining threshold limits was developed. To illustrate this approach, analysis of environmental influences that drive the abundance of a target indicator species (the pink shrimp, Farfantepenaeus duorarum) provided a real example of applicability. The relationship between salinity and temperature and abundance of F. duorarum is well documented, but the effect of changes in water quality upstream on pink shrimp abundance is not well understood. The highly variant nature surrounding catch of a specific number of organisms in the wild, and the data available from up-stream hydrology measures for salinity and temperature, made this an ideal candidate for the approach to provide a determination about the influence of changes in hydrology on populations of organisms.

  15. New Mediterranean Marine biodiversity records (December, 2013

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    M. BILECENOGLU

    2013-10-01

    Full Text Available Based on recent biodiversity studies carried out in different parts of the Mediterranean, the following 19 species are included as new records on the floral or faunal lists of the relevant ecosystems: the green algae Penicillus capitatus (Maltese waters; the nemertean Amphiporus allucens (Iberian Peninsula, Spain; the salp Salpa maxima (Syria; the opistobranchs Felimida britoi and Berghia coerulescens (Aegean Sea, Greece; the dusky shark Carcharhinus obscurus (central-west Mediterranean and Ionian Sea, Italy; Randall’s threadfin bream Nemipterus randalli, the broadbanded cardinalfish Apogon fasciatus and the goby Gobius kolombatovici (Aegean Sea, Turkey; the reticulated leatherjack Stephanolepis diaspros and the halacarid Agaue chevreuxi (Sea of Marmara, Turkey; the slimy liagora Ganonema farinosum, the yellowstripe barracuda Sphyraena chrysotaenia, the rayed pearl oyster Pinctada imbricata radiata and the Persian conch Conomurex persicus (south-eastern Crete, Greece; the blenny Microlipophrys dalmatinus and the bastard grunt Pomadasys incisus (Ionian Sea, Italy; the brown shrimp Farfantepenaeus aztecus (north-eastern Levant, Turkey; the blue-crab Callinectes sapidus (Corfu, Ionian Sea, Greece. In addition, the findings of the following rare species improve currently available biogeographical knowledge: the oceanic pufferfish Lagocephalus lagocephalus (Malta; the yellow sea chub Kyphosus incisor (Almuñécar coast of Spain; the basking shark Cetorhinus maximus and the shortfin mako Isurus oxyrinchus (north-eastern Levant, Turkey.

  16. A LATITUDINAL GRADIENT OF BETA DIVERSITY IN BY CATCH OF MARINE SHRIMPS FISHERIES IN BRAZILIAN NORTH COAST

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    Breno Portilho Maia

    2016-03-01

    Full Text Available Industrial shrimp fisheries in northern Brazil use vessels equipped with trawls of low selectivity that capture considerable amounts of non-target bycatch species, and consequently, generate fauna biomass. In this study, we aimed to examine the composition and distribution of ichthyofaunal bycatches associated with pink shrimp industrial fishery between May 2010 and June 2011. Seven vessels were monitored for a period of151 travel days, during which trawls were towed 461 times. The northern coast was subdivided into the Pará Continental Platform, Amazonas River Estuary (ARE, and Amapá Continental Platform (ACP. Perciformes was the most abundant order (68.91%; Sciaenidae, the most abundant family (55.89%; and Macrodon ancylodon, the most abundant species (23,48%. ARE and ACP are regions with high biological diversity and density of species and similar ichthyofauna. The similarities between ARE and ACP regions can be attributed to the Guiana Current, which carries most of the water drained from the rivers of the Amazon Basin along the coast of Amapá; it promotes the high productivity of these regions. Monitoring of shrimp trawl fishing in the northern coast of Brazil can contribute to the preservation of populations of endemic animal species such as Macrodon ancylodon and Stellifer rastrifer, which are frequently associated with shrimp bycatch and therefore, particularly affected by this type of fishing. Keywords: Farfantepenaeus subtilis; fish; Sciaenidae; industrial fishing.

  17. Relating large-scale climate variability to local species abundance: ENSO forcing and shrimp in Breton Sound, Louisiana, USA

    Science.gov (United States)

    Piazza, Bryan P.; LaPeyre, Megan K.; Keim, B.D.

    2010-01-01

    Climate creates environmental constraints (filters) that affect the abundance and distribution of species. In estuaries, these constraints often result from variability in water flow properties and environmental conditions (i.e. water flow, salinity, water temperature) and can have significant effects on the abundance and distribution of commercially important nekton species. We investigated links between large-scale climate variability and juvenile brown shrimp Farfantepenaeus aztecus abundance in Breton Sound estuary, Louisiana (USA). Our goals were to (1) determine if a teleconnection exists between local juvenile brown shrimp abundance and the El Niño Southern Oscillation (ENSO) and (2) relate that linkage to environmental constraints that may affect juvenile brown shrimp recruitment to, and survival in, the estuary. Our results identified a teleconnection between winter ENSO conditions and juvenile brown shrimp abundance in Breton Sound estuary the following spring. The physical connection results from the impact of ENSO on winter weather conditions in Breton Sound (air pressure, temperature, and precipitation). Juvenile brown shrimp abundance effects lagged ENSO by 3 mo: lower than average abundances of juvenile brown shrimp were caught in springs following winter El Niño events, and higher than average abundances of brown shrimp were caught in springs following La Niña winters. Salinity was the dominant ENSO-forced environmental filter for juvenile brown shrimp. Spring salinity was cumulatively forced by winter river discharge, winter wind forcing, and spring precipitation. Thus, predicting brown shrimp abundance requires incorporating climate variability into models.

  18. New Mediterranean Biodiversity Records (April, 2014

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    K. KAPIRIS

    2013-12-01

    Full Text Available According to reports, the following 16 species have extended their distribution to other Mediterranean areas or have made a new appearance in other regions. The first category includes the following organisms: The rare and common Indo-Pacific seaweed Codium arabicum (Lebanese coasts, the acari Thalassarachna affinis (Marmara Sea, and the non-indigenous nudibranch Flabellina rubrolineata, which has also been found in many other areas of the Aegean Sea. In addition, the rare sea slug Thecacera pennigera (Piccolo of Taranto, the fangtooth moray Enchelycore anatina (National Marine Park of Zakynthos, Ionian Sea, the carangid Seriola fasciata (Gulf of Antalya, Lagocephalus sceleratus (SE. Ionian Sea, the reticulated leatherjacket Stephanolepis diaspros (Slovenia, N. Adriatic Sea, the marbled stingray, Dasyatis marmorata (NE Levantine, the starry smooth-hound Mustelus asterias (Iskenderun Bay, NE Mediterranean, the cephalopod Ommastrephes bartramii (Ionian Sea have also been reported. The Atlantic crab Dyspanopeus sayi has expanded to many Italian areas and the blue crab Callinectes sapidus to a lake in N. Greece and in the S. Adriatic Sea. Finally, Farfantepenaeus aztecus has been found in the Ionian Sea, thus showing its wide expansion in the Mediterranean. The larval stages of Faccionella oxyrhyncha have been found, after many years, in the Aegean Sea and the first report of an existence on intersexual acari Litarachna duboscqi in Split(Adriatic Sea was reported.

  19. New Mediterranean Marine biodiversity records (December, 2013

    Directory of Open Access Journals (Sweden)

    M. BILECENOGLU

    2013-07-01

    Full Text Available Based on recent biodiversity studies carried out in different parts of the Mediterranean, the following 19 species are included as new records on the floral or faunal lists of the relevant ecosystems: the green algae Penicillus capitatus (Maltese waters; the nemertean Amphiporus allucens (Iberian Peninsula, Spain; the salp Salpa maxima (Syria; the opistobranchs Felimida britoi and Berghia coerulescens (Aegean Sea, Greece; the dusky shark Carcharhinus obscurus (central-west Mediterranean and Ionian Sea, Italy; Randall’s threadfin bream Nemipterus randalli, the broadbanded cardinalfish Apogon fasciatus and the goby Gobius kolombatovici (Aegean Sea, Turkey; the reticulated leatherjack Stephanolepis diaspros and the halacarid Agaue chevreuxi (Sea of Marmara, Turkey; the slimy liagora Ganonema farinosum, the yellowstripe barracuda Sphyraena chrysotaenia, the rayed pearl oyster Pinctada imbricata radiata and the Persian conch Conomurex persicus (south-eastern Crete, Greece; the blenny Microlipophrys dalmatinus and the bastard grunt Pomadasys incisus (Ionian Sea, Italy; the brown shrimp Farfantepenaeus aztecus (north-eastern Levant, Turkey; the blue-crab Callinectes sapidus (Corfu, Ionian Sea, Greece. In addition, the findings of the following rare species improve currently available biogeographical knowledge: the oceanic pufferfish Lagocephalus lagocephalus (Malta; the yellow sea chub Kyphosus incisor (Almuñécar coast of Spain; the basking shark Cetorhinus maximus and the shortfin mako Isurus oxyrinchus (north-eastern Levant, Turkey.

  20. Mercury and selenium concentrations in marine shrimps of NW Mexico: health risk assessment.

    Science.gov (United States)

    Frías-Espericueta, M G; Ramos-Magaña, B Y; Ruelas-Inzunza, J; Soto-Jiménez, M F; Escobar-Sánchez, O; Aguilar-Juárez, M; Izaguirre-Fierro, G; Osuna-Martínez, C C; Voltolina, D

    2016-11-01

    We determined total Hg and Se contents of hepatopancreas, exoskeleton, and muscle, and the Se:Hg molar ratios in the muscle of shrimps Farfantepenaeus californiensis and Litopenaeus stylirostris caught in NE Pacific Mexican waters. Total Hg mean values in muscle, hepatopancreas, and exoskeleton were 0.31 ± 0.26, 0.28 ± 0.29, and 0.24 ± 0.06 μg g(-1), and 0.46 ± 0.46, 0.41 ± .034, and 0.24 ± 0.06 μg g(-1) for F. californiensis and L. stylirostris, respectively. In all tissues, the mean concentrations of Se tended to be close to one order of magnitude higher than the respective Hg values. In F. californiensis, the hepatopancreas of the larger commercial size had significantly (p < 0.05) higher Hg content than smaller sizes, but correlations size-Hg concentration calculated for each tissue of either species were not significant. The Hg content of the muscle of all commercial sizes of both species was lower than the permissible limit and their Se:Hg ratios in all sizes were higher than 1, indicating low risk for human consumption.

  1. Pink shrimp as an indicator for restoration of everglades ecosystems

    Science.gov (United States)

    Browder, Joan A.; Robblee, M.B.

    2009-01-01

    The pink shrimp, Farfantepenaeus duorarum, familiar to most Floridians as either food or bait shrimp, is ubiquitous in South Florida coastal and offshore waters and is proposed as an indicator for assessing restoration of South Florida's southern estuaries: Florida Bay, Biscayne Bay, and the mangrove estuaries of the lower southwest coast. Relationships between pink shrimp and salinity have been determined in both field and laboratory studies. Salinity is directly relevant to restoration because the salinity regimes of South Florida estuaries, critical nursery habitat for the pink shrimp, will be altered by changes in the quantity, timing, and distribution of freshwater inflow planned as part of the Comprehensive Everglades Restoration Project (CERP). Here we suggest performance measures based on pink shrimp density (number per square meter) in the estuaries and propose a restoration assessment and scoring scheme using these performance measures that can readily be communicated to managers, policy makers, and the interested public. The pink shrimp is an appropriate restoration indicator because of its ecological as well as its economic importance and also because scientific interest in pink shrimp in South Florida has produced a wealth of information about the species and relatively long time series of data on both juveniles in estuarine nursery habitats and adults on the fishing grounds. We suggest research needs for improving the pink shrimp performance measure.

  2. Efeito do processamento sobre os níveis de colesterol e 7-cetocolesterol em camarão-rosa Effects of processing on free cholesterol and 7-ketocholesterol concentrations in pink-shrimp

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    Andréa Figueiredo Procópio de Moura

    2002-08-01

    Full Text Available A oxidação do colesterol leva à formação de óxidos biologicamente ativos, capazes de desencadear processos citotóxicos, aterogênicos, mutagênicos e cancerígenos. Durante o processamento, os alimentos são expostos, além do calor, ao oxigênio e a outros fatores desencadeadores da oxidação lipídica, inclusive do colesterol. Os crustáceos, além de possuírem níveis elevados de colesterol, apresentam em sua fração lipídica ácidos graxos com alto grau de insaturação, o que favorece a oxidação do referido esterol. O 7-cetocolesterol tem sido utilizado como indicador da oxidação do colesterol, por ser o óxido formado nos estágios iniciais e em maior quantidade que os demais. O objetivo deste trabalho foi avaliar o efeito do cozimento e da fritura sobre a oxidação do colesterol em camarão-rosa (Penaeus brasiliensis e Penaeus paulensis. O processamento do camarão-rosa, de um modo geral, levou à diminuição das concentrações de colesterol e 7-cetocolesterol livres. A redução observada foi bem maior na fritura do que no cozimento, e mais acentuada para o 7-cetocolesterol. Enquanto os níveis de colesterol foram 10,7 e 24,7% menores, a diminuição do 7-cetocolesterol atingiu 41,5 e 61% no camarão cozido e frito, respectivamente, em relação ao controle. A redução de colesterol e 7-cetocolesterol livres em camarão-rosa processado foi relacionada com a eluição destes compostos nos meios de processamento, água de cozimento e óleo de fritura.Cholesterol oxidation results in the production of oxides that exert a wide range of biological activities such as atherosclerosis, mutagenesis, carcinogenesis and citotoxicity. During cooking foods are exposed to oxygen, heat and other factors that can promote lipid oxidation, including cholesterol oxidation. Because of the presence of polyunsaturated fatty acids and the high levels of cholesterol crustaceous have a great potential for oxide production. 7-ketocholesterol

  3. Hábitos alimenticios y ecología trófica del pez Lutjanus griseus (Pisces: Lutjanidae asociado a la vegetación sumergida en la Laguna de Términos, Campeche, México

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    Emma Guevara

    2007-12-01

    Full Text Available Se presentan los resultados de un estudio de los hábitos alimenticios de Lutjanus griseus asociado a la vegetación sumergida en El Cayo, Laguna de Términos, Campeche, México. La investigación se realizó siguiendo un diseño de muestreo intensivo tanto en escala espacial como temporal. Se recolectaron un total de 994 individuos, de los cuales 672 tenía alimento en sus estómagos. Se analizaron los porcentajes en número, peso y frecuencia de los grupos tróficos, así como el índice de importancia relativa. Los componentes alimenticios dominantes fueron Farfantepenaeus duorarum, Palaemonetes octavie, Eucinostomus gula y Libinia dubia. La salinidad y la temperatura se relacionaron con el número de individuos colectados así como con un incremento en el consumo de peces por los individuos de mayor talla. Se calculó el índice de diversidad de dieta para seis clases de talla de los peces, examinándose su variación a través del año. Los peces de menor y mayor talla mostraron los valores más bajos de este índice, mientras que los organismos de las tallas intermedias presentaron los valores más altos. Los resultados mostraron que L. griseus tiene preferencia por hábitats con vegetación sumergida. El porcentaje de peces con alimento en sus estómagos fue mayor durante la noche que durante el día, evidenciando los hábitos nocturnos de esta especie.Feeding habits and trophic ecology of the fish Lutjanus griseus (Pisces: Lutjanidae associated with submerged vegetation in Laguna de Términos, Campeche, Mexico. In Campeche, Mexico, the Laguna de Términos has Thalassia testudinum beds inhabited by the grey snapper, Lutjanus griseus (Linnaeus 1758. Along one year, we collected 994 individuals and 672 had food in their stomachs; we recorded number, weight, and frequency of trophic groups, and the index of relative importance. Dominant food components were Farfantepenaeus duorarum and Palemonetes octaviae, Eucinostomus gula (Cuvier 1830 and

  4. Shrimp postlarvae immigration during the high current velocity period of the flood tide in the Southern Gulf of Mexico Inmigración de larvas de camarón durante el periodo de mayor velocidad de flujo de marea en el sur del Golfo de México

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    César Flores-Coto

    2010-04-01

    Full Text Available The immigration pattern of shrimp postlarvae was analysed in the Santana inlet (Tabasco State, Mexico during the high current velocity period of the flood tide at the time of the full Moon, throughout the period of greatest postlarvae abundance (April-November. Nets with a 50 cm diameter mouth, 1.5 m long, and a 505 µm mesh were used for simultaneous sampling at three depth levels: 1, surface (0.5 m, 2, mid-water (3.5 m and 3, bottom (6.5 m. A total of 15,530 postlarvae of Farfantepenaeus duorarum and Litopenaeus setiferus were collected in 101 samples: 33 at level 1, 34 at level 2, and 34 at level 3. More than 75% of L. setiferus larvae were larger than 8 mm and more than 81% of F. duorarum were larger than 9 mm. Temperature and salinity varied only slightly, indicating that they do not play a strong role in postlarvae immigration. Postlarvae entered at all water depths. A larvae immigration pattern may be established for both species, with the greatest postlarvae density at the start of the high current velocity period of the flood tide, and a marked decrease towards the end of the period. It is assumed that this immigration pattern allows a deeper penetration into nursery areas and enhances the success of the process of recruitment into estuaries.El patrón de inmigración de postlarvas de camarón en la Boca de Santana (Tabasco, México fue analizado durante el lapso de alta velocidad de corriente del flujo de marea durante luna llena, en el periodo de mayor abundancia de larvas (abril-noviembre. Se emplearon redes de 50 cm de diámetro de boca, 1.5 m de largo y 505 µm de luz de malla, con muestreos simultáneos en tres niveles: 1, superficie (0.5 m, 2, media agua (3.5 m y 3, fondo (6.5 m. Se colectaron 15,530 postlarvas de Farfantepenaeus duorarum y Litopenaeus setiferus en 101 muestras: 33 en el nivel 1, 34 en el nivel 2, y 34 en el nivel 3. Más del 75% de larvas de L. setiferus fueron mayores de 8 mm y más del 81% de F. duorarum

  5. The invasion of five alien species in the Delta do Parnaíba Environmental Protection Area, Northeastern Brazil

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    Daniel Loebmann

    2010-09-01

    Full Text Available Marine biological invasions have been regarded as one of the major causes of native biodiversity loss, with shipping and aquaculture being the leading contributors for the introductions of alien species in aquatic ecosystems. In the present study, five aquatic alien species (one mollusk, three crustaceans and one fish species were detected during dives, shore searches and from the fisheries on the coast of the Delta do Parnaíba Environmental Protection Area, in the States of Piauí and Maranhão, Northeastern Brazil. The species were the bicolor purse-oyster Isognomon bicolor, the whiteleg shrimp Litopenaeus vannamei, the giant river prawn Macrobrachium rosenbergii, the Indo-Pacific swimming crab Charybdis hellerii and, the muzzled blenny Omobranchus punctatus. Ballast water (I. bicolor, C. hellerii, and O. punctatus and aquaculture activities (L. vannamei and M. rosenbergii in adjacent areas are the most likely vectors of introduction. All exotic species found have potential impact risks to the environment because they are able to compete against native species for resources (food and habitat. Isognomon bicolor share the same habitat and food items with the native bivalve species of mussels and barnacles. Litopenaeus vannamei share the same habitat and food items with the native penaeids such as the pinkspot shrimp Farfantepenaeus brasiliensis, the Southern brown shrimp Farfantepenaeus subtilis, and the Southern white shrimp Litopenaeus schmitti, and in the past few years L. vannamei was responsible for a viral epidemics in the cultivation tanks that could be transmitted to native penaeid shrimps. Charybdis hellerii is also able to cause impacts on the local fisheries as the species can decrease the populations of native portunid crabs which are commercialized in the studied region. Macrobrachium rosenbergii may be sharing natural resources with the Amazon River prawn Macrobrachium amazonicum. Omobranchus punctatus shares habit with the native

  6. The Effect of Latitudinal Variation on Shrimp Reproductive Strategies.

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    Madelon van de Kerk

    Full Text Available Reproductive strategies comprise the timing and frequency of reproductive events and the number of offspring per reproductive event, depending on factors such as climate conditions. Therefore, species that exhibit plasticity in the allocation of reproductive effort can alter their behavior in response to climate change. Studying how the reproductive strategy of species varies along the latitudinal gradient can help us understand and predict how they will respond to climate change. We investigated the effects of the temporal allocation of reproductive effort on the population size of brown shrimp (Farfantepenaeus aztecus along a latitudinal gradient. Multiple shrimp species exhibit variation in their reproductive strategies, and given the economic importance of brown shrimp to the commercial fishing sector of the Unites States, changes in the timing of their reproduction could have significant economic and social consequences. We used a stage-based, density-dependent matrix population model tailored to the life history of brown shrimp. Shrimp growth rates and environmental carrying capacity were varied based on the seasonal climate conditions at different latitudes, and we estimated the population size at equilibrium. The length of the growing season increased with decreasing latitude and the reproductive strategy leading to the highest population size changed from one annual birth pulse with high reproductive output to continuous low-output reproduction. Hence, our model confirms the classical paradigm of continuous reproduction at low latitudes, with increased seasonality of the breeding period towards the poles. Our results also demonstrate the potential for variation in climate to affect the optimal reproductive strategy for achieving maximum population sizes. Certainly, understanding these dynamics may inform more comprehensive management strategies for commercially important species like brown shrimp.

  7. Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides

    Science.gov (United States)

    Criales, Maria M.; Browder, Joan A.; Mooers, C.N.K.; Robblee, M.B.; Cardenas, H.; Jackson, Thomas L.

    2007-01-01

    Transport and behavior of pink shrimp Farfantepenaeus duorarum larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect. At the Marquesas station, midway between Dry Tortugas and Florida Bay, internal tides were recognized by anomalously cool water, a shallow thermocline with strong density gradients, strong current shear, and a high concentration of pink shrimp larvae at the shallow thermocline. Low Richardson numbers occurred at the pycnocline depth, indicating vertical shear instability and possible turbulent transport from the lower to the upper layer where myses and postlarvae were concentrated. Analysis of vertically stratified plankton suggested that larvae perform vertical migrations and the specific behavior changes ontogenetically; protozoeae were found deeper than myses, and myses deeper than postlarvae. Relative concentrations of protozoea in the upper, middle and bottom layers were consistent with a diel vertical migration, whereas that of postlarvae and myses were consistent with the semidiurnal tides in phase with the flood tide. Postlarvae, the shallowest dwellers that migrate with a semidiurnal periodicity, experienced the largest net onshore flux and larval concentrations were highly correlated with the cross-shelf current. These results provide the first evidence of an onshore tidal transport (a type of selective tidal stream transport, STST), in decapod larvae migrating in continental shelf waters offshore, ca. 100 km from the coast and at a depth of 20 m, while approaching the coastal nursery grounds. Longer time series would be necessary to establish whether internal tides play any role in the larval onshore transport of this species and determine if the STST is the dominant onshore transport mechanism.

  8. Composition of shrimp populations (Crustacea: Decapoda in non-vegetated areas of two river islands in a Brazilian Amazon estuary

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    Priscila Sousa Vilela da Nóbrega

    2013-12-01

    Full Text Available This study investigates the shrimp found in non-vegetated areas of an estuary of the Amazon River. We ascertained the input of juveniles, species' biometrics and the influence of environmental factors on the abundance of species. The samples were collected monthly, from August 2006 to July 2007, in two places in the estuary, each next to an island. For collecting, we used a manual trawl to perform three hauls per month, totaling 36 samples per site. The abundance of shrimps was estimated as a function of the density of specimens per unit area. We used the Spearman's correlation to test the hypothesis that there is significant correlation between the average of the environmental variables measured and variations in shrimp density. The Kruskal-Wallis and the Mann-Whitney tests showed that there were significant differences in environment factors (temperature and salinity among the months and sites. We obtained 6,091 shrimps, from which 5,231 (85.88% were caught off the Arapiranga Island and 860 (14.12% off the Mosqueiro Island, Palaemonidae and Penaeidae were the only families recorded. Five species were collected: Macrobrachium amazonicum (Heller, 1862, Macrobrachium surinamicum Holthuis, 1948, Macrobrachium carcinus (Linnaeus, 1758, Macrobrachium rosenbergii (De Man, 1879, and Farfantepenaeus subtilis (Pérez-Farfante, 1967. The latter (pink shrimp was found for the first time in oligohaline environments (0-8. Macrobrachium amazonicum was the most abundant species. The recruitment of M. amazonicum juveniles was continuous throughout the year. The population of M. surinamicum was composed by juveniles and adults and that of F. subtilis exclusively by juveniles. The environmental factors analyzed were variable throughout the year and seem to explain the patterns of shrimp species occurrence in the region, the variation in their abundance and juvenile recruitment.

  9. Prevalencia y distribución de los principales agentes etiológicos que afectan los langostinos silvestres en Tumbes, Perú

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    Rubén Alfaro Aguilera

    2011-05-01

    Full Text Available Se determinó la prevalencia y distribución de diferentes agentes patógenos en langostinos silvestres, en la zona de esteros de la Región Tumbes - Perú, entre marzo y diciembre de 2009. Los canales de marea considerados en este estudio fueron: Boca del Río Tumbes, El Alcalde, Jelí, El Bendito, Envidia, Soledad y Algarrobo. Se colectó un total de 1926 langostinos entre juveniles y pre-adultos de las especies Litopenaeus vannamei, L. stylirostris y Farfantepenaeus californiensis. Utilizando la técnica de la PCR, se detectó la presencia de los patógenos NHPB (0,62%, IHHNV (0,31%, BP (1,61% y WSV (2,75%; no se encontró infección por TSV. Las tres especies en estudio fueron positivas a WSV y BP, presentándose la mayor prevalencia de infección por WSV (2,98% en la especie L. stylirostris y por BP (2,66% en L. vannamei. La NHPB fue detectada en las especies L. vannamei y L. stylirostris con 0,77% y 0,43% de prevalencia respectivamente. Se obtuvo una prevalencia de 0,52% para IHHNV en L. vannamei. Las más altas prevalencias de las infecciones por WSV, BP, NHPB e IHHNV se registraron en los canales de marea El Alcalde (10,79%, Algarrobo (4,51%, Envidia (2,26% y Jelí (5,05%. Los datos señalan la presencia constante de diversos patógenos virales y bacterianos en diferentes especies de peneidos y su amplia distribución a lo largo del litoral tumbesino, lo que constituye un riesgo potencial para el desarrollo de la acuicultura en la región, y podría afectar las poblaciones naturales de langostinos.

  10. SEM characterization of anatomical variation in chitin organization in insect and arthropod cuticles.

    Science.gov (United States)

    Chandran, Rakkiyappan; Williams, Lee; Hung, Albert; Nowlin, Kyle; LaJeunesse, Dennis

    2016-03-01

    the chitin organizations in the fruit fly, Drosophila melanogaster, and the Atlantic brown shrimp, Farfantepenaeus aztecus. Interestingly many of the homologous anatomical structures from diverse arthropods exhibit similar patterns of chitin organization suggesting that a common set of parameters, govern chitin organization. Copyright © 2016 Elsevier Ltd. All rights reserved.

  11. Hábitos alimenticios del pargo rayado, Lutjanus synagris (Perciformes: Lutjanidae, en la zona norte del Caribe colombiano Food habits of the lane snapper, Lutjanus synagris (Perciformes: Lutjanidae, in the north zone of the Colombian Caribbean

    Directory of Open Access Journals (Sweden)

    Oscar Doncel

    2010-01-01

    Full Text Available Se describen los hábitos alimenticios de Lutjanus synagris, mediante el análisis de contenido estomacal, considerando el espectro trófico a nivel general, por sexo y talla, los aspectos ecológicos de las presas, su distribución espacial y la relación de la dieta con las condiciones del habitat. Se analizaron 148 estómagos, de los cuales el 45,3% estaba lleno y el 54,7% vacío. Las presas más representativas (%N fueron: Portunus spp. (27,3%; n = 44 y Squilla intermedia (10,6%; n = 17. El análisis gravimétrico (%P mostró que entre las categorías con mayor peso se encontraron: Gastropoda (31,8%; 51,7 g y Farfantepenaeus spp. (17,5%o; 28,5 g. La frecuencia de ocurrencia (%>FO mostró que: Portunus spp. (25,8%>; 17 estómagos y S. intermedia (10,5%>; 7 estómagos fueron las presas más frecuentes. Según el %>IIR, las categorías más representativas en la dieta fueron Portunus spp. (43,0%> y Gastropoda (13,4%>. Se identificaron cuatro categorías como presas principales: Portunidae (837,06, Gastropoda (260,29, Squillidae (234,66 y Penaeidae (218,05, dos como presas secundarias: Sicyoniidae (126,35 y Trichiuridae (75,64 y las demás como presas circunstanciales. La distribución espacial de la amplitud del nicho trófico y de las tallas de L. synagris, permitió identificar dos zonas: la primera entre Riohacha y Dibulla con los valores más altos de amplitud del nicho trófico (0,64 a 1,00 denotando predadores generalista y donde se registraron las tallas menores y la segunda, entre Riohacha y Punta Gallinas con los valores más bajos de amplitud del nicho trófico (0,00 a 0,23, donde los individuos mostraron alto grado de especialización en la dieta y las tallas mayores.This work describes the food habits of Lutjanus synagris by means of stomach content analysis, considering the trophic spectrum in general as well as by sex and size, the ecological aspeets of the preys, their spatial distribution, and the relationship of the diet with

  12. Reproducción y alimentación del tiburón enano Mustelus dorsalis (Pisces: Triakidae en el Golfo de Nicoya, Costa Rica: Elementos para un manejo sostenible

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    José Rodrigo Rojas M

    2006-09-01

    Full Text Available Se determinaron aspectos reproductivos y alimentarios del tiburón enano Mustelus dorsalis, a partir de 311 ejemplares capturados con línea y anzuelo en el Golfo de Nicoya, Costa Rica, durante marzo de 1999 y mayo de 2000. Se reconocieron 250 hembras y 61 machos. Las hembras son más grandes (550 a 660 mm vs. (500-585 mm y más pesadas (400-1 000 g vs. (200-300 g que los machos. Todos los ejemplares estaban maduros, la talla mínima de especimenes maduros fue de 500 y 541 mm para hembras y machos respectivamente. Entre septiembre y marzo todas las hembras y machos estaban maduras, e inmaduras entre abril y agosto. Se estudiaron 1 259 embriones, con una variación entre dos y seis embriones por litera. La longitud total de los embriones es entre 130 y 205 mm y el peso entre 6 y 35 g. Este tiburón es carnívoro polífago oportunista que consume crustáceos (Squilla hancocki, S. parva, Farfantepenaeus sp., peces (Anchoa sp. Caranx, sp, Lujanus sp., Engraulis y Ophistonema sp., y moluscos (Loligo sp. y Octopus sp.. Squilla hancocki es el ítem alimentario mas importante. La presencia de tiburones maduros de ambos sexos a lo largo del año en aguas poco profundas, y el consumo de presas bentónicas que viven en fondos rocosos costeros, sugiere la posibilidad de que este sector del Golfo de Nicoya esté funcionando como una zona de crianza y hábitat esencial. Con base en estos resultados se propone el establecimiento de un plan de manejo integral.Reproduction and feeding habits of Mustelus dorsalis (Pisces: Triakidae in the Gulf of Nicoya, Costa Rica: Elements for a sustainable management. A total of 311 sharptooth smooth-hound Mustelus dorsalis were collected in the Gulf of Nicoya, Costa Rica from March 1999 to May 2000 to determine reproduction and feeding habits. The fishes were collected using hook and line. 250 females and 61 males were identified. The females are bigger (550-660 mm and heavier (400-1 000 g than males (500-585 mm and 200-300 g