ina ina ina ina, Br Br Br Br Brazil. azil. azil. azil. azil. The artisanal fishery of the sea-bob-shrimp is known as "sun to sun fishery" and is developed in large scale along the Brazilian coast, playing a significant economic, historical, social and cultural role. Nowadays, sea-bob-shrimp fisheries is classified as the highest economic interest and the second fisheries resource in the South-southeast coast of Brazil. Aiming to study the biology and fishery of the sea-bob-shrimp at Armação do Itapocoroy, Penha (26º40'-26º47'S and 48º36'-48º38'W), 30 minutes samples were performed monthly, from August 1996 to July 2003. Total and standard length, sex, maturation stages, biomass and total number of specimens were registered between 1996-1997 and 1999-2001. Between August 1998 and July 1999, the diet of X. kroyeri (Heller, 1862) was also studied. The species' total length varied from 3.0 to 16.0 cm and seasonal fluctuations in its abundance and biomass showed higher values along the summer and autumn months. The length/weight relationship indicated an isometric growth and first maturity occurring between 7.3 and 7.9 cm, reached in six months. The species presented two spawning peaks along the year, and the artisanal fishery showed a higher pressure over the adult stock. The trophic spectrum was composed by 30 items, being Gammaridae, sand, other crustaceans and organic matter the basic elements of its diet. A mean value of 67.82 vessels operate yearly during eight months on the sea-bob-shrimp fishery at Armação do Itapocoroy, yielding a total of up to 170 ton/year. KEY WORDS. Artisanal fishery, natural diet, population structure, seasonal fluctuations. RESUMO. A pesca artesanal do camarão sete-barbas é denominada "pesca de sol a sol" e realizada em grande escala no litoral brasileiro, apresentando uma significativa importância econômica, histórica, social e cultural. Atualmente, a pesca desse camarão é considerada a de maior interesse econômico e o segundo recurso pesqueiro nas regiões Sudeste-Sul do Brasil. Com o objetivo de estudar a biologia e pesca do camarão sete-barbas na Armação do Itapocoroy, Penha (26º40'-26º47'S e 48º36'-48º38'W), durante o período de agosto de 1996 a julho de 2003 foram realizadas coletas mensais com 30 minutos de duração. Foram registrados o número e a biomassa dos exemplares por arrasto, e entre anos de 1996-1997 e 1999-2001, também foram anotados o sexo, o comprimento e peso total, estádio de maturação. Além dessas informações, entre agosto de 1998 a julho de 1999 foi analisado a dieta natural da espécie. X. kroyeri (Heller, 1862) apresentou comprimento total variando entre 3,0 e 16,0 cm e flutuações sazonais na abundância e biomassa, com as maiores taxas de captura ocorreram durante os meses de verão e outono. A relação peso/comprimento indicou um padrão de crescimento tendendo ao isométrico com tamanho de primeira maturação entre 7,3 a 7,9 cm, alcançados em seis meses de idade. A espécie apresentou dois picos de desova ao longo do ano, sendo que a pesca artesanal vem atuando com ...
A ictiofauna acompanhante na pesca de camarão sete-barbas foi estudada mensalmente entre agosto 1996 a julho 2003 nas áreas de atuação da pesca artesanal na Armação do Itapocoroy, Penha. Foram utilizadas duas redes-de-arrasto com portas, malha de 3,0 cm na manga e corpo e de 2,0 cm no ensacador, tracionada por baleeira com velocidade média de 2,0 nós. A temperatura e salinidade média da água de fundo mantiveram um padrão uniforme de flutuação sazonal, sem diferença significativa entre os anos de coleta. Das 60 espécies capturadas, 22 foram comuns ao longo do período de coleta. As famílias Sciaenidae, Carangidae e Clupeidae apresentaram o maior número de espécies contribuindo com 92,0% das capturas, onde Stellifer spp., Paralonchurus brasiliensis e Isopisthus parvipinnis foram mais abundantes nas coletas, apresentando ocorrência regular ao longo dos anos. Ocorreram flutuações sazonais na abundância e diversidade da ictiofauna com diferença significativa entre os anos de coleta e biomassa, bem como em número de exemplares. O monitoramento da pesca de arrasto direcionada ao camarão sete-barbas poderá contribuir na manutenção dos estoques e assegurar a subsistência das comunidades tradicionais no litoral catarinense.
Abundance of ovigerous females, size of the first gonadal maturation and the possible migration, route of the blue crab Callinectes danae from the Conceição Lagoon system, Santa Catarina Isle, Brazil, are described. This lagoon is connected with the coastal area through a canal. A total of 1,124 crabs was caught during a 19 month sampling period. The reproduction and recruitment of juveniles occurred all year-round, with two peaks of abundance (February and September), correlated with the presence of ovigerous females (June and January). The mean carapace width at which the crabs attained gonadal maturity for the first time was 9.4 cm in males and 8.4 cm in females. The Conceição Lagoon is a growth, reproduction, and spawning area for the species. However, egg eclosion occurs outside the lagoon following migration of ovigerous females to the open sea. After hatching the eggs, some females return to the lagoon, but males stay there for most of their life cycle.
Aquatic birds are the natural reservoir for avian influenza viruses (AIV). Habitats in Brazil provide stopover and wintering sites for water birds that migrate between North and South America. The current study was conducted to elucidate the possibility of the transport of influenza A viruses by birds that migrate annually between the Northern and Southern Hemispheres. In total, 556 orotracheal/cloacal swab samples were collected for influenza A virus screening using real-time RT-PCR (rRT-PCR). The influenza A virus-positive samples were subjected to viral isolation. Four samples were positive for the influenza A matrix gene by rRT-PCR. From these samples, three viruses were isolated, sequenced and characterized. All positive samples originated from a single bird species, the ruddy turnstone (Arenaria interpres), that was caught in the Amazon region at Caeté Bay, Northeast Pará, at Ilha de Canelas. To our knowledge, this is the first isolation of H11N9 in the ruddy turnstone in South America.
ABSTRACT. FEEDING NATURAL DYNAMICS 01' CALLlNECTES DANAE SMITH (DECAPODA, PORTUNIDAE) FROM LAGOA DA CONCEIÇAo, FLORIANÓPOLlS, SANTA CATARINA, BRASIL.From March/91 to February/92 monthly co11ection surveys were calTied out to obtain basic information about the dynamics of feeding and trophic spectrum of C. dallae Smith, 1869. A total of 456 males and 527 females were caught. The diet ofthe spec ies was not sex related. The trophic spectrum of C. danae is composed by a high number of items. The 35 items were assembled in 14 categories and the feeding index was applied. Mo11usca, Polychaeta and Crustacea were observed to be basic elements in the species diet, Osteichthyes and MOND appear as secondary resource whereas vegetal material were found to be 01' less impol1ance.
BRANCO, J.O., FREITAS JÚ NIOR, F., CHRISTOFFERSEN, M.L. Bycatch fauna of seabob shrimp trawl fisheries from Santa Catarina State, southern Brazil.http://dx.doi. org/10.1590/1676-06032015014314Abstract: Marine communities in tropical regions contain a great diversity of species that play key roles in ecological processes. The observed bycatch fauna in artisanal fishing for the seabob shrimp Xiphopenaeus kroyeri (Heller, 1862) in the southwest Atlantic exceeds the quantity of commercial shrimp captured. This bycatch has not been previously inventoried extensively in Brazil, particularly in the State of Santa Catarina, where small-scale shrimp fisheries is a traditional activity and dominates the local fishing economy. Six municipalities were sampled three times a month, from 1996 to 2011, yielding 216 species belonging to the bycatch (7 cnidarians, 22 mollusks, 42 crustaceans, 11 echinoderms, and 134 fishes). Bycatch management is a pressing aspect of shrimp fisheries. By inventorying the accidental bycatch, we provide a preliminary step towards defining intervention measures to reduce or make better use of this bycatch in seabob artisanal fisheries. Conservation of marine biodiversity is still inadequate in Brazil. We have attempted to identify additional threats to vulnerable and endangered species resulting from shrimp trawling. Keywords: bycatch fauna, marine diversity, southwest Atlantic, threatened species, Xiphopenaeus kroyeri. BRANCO, J.O., FREITAS JÚ NIOR, F., CHRISTOFFERSEN, M.L. Fauna acompanhante em pescas de arrastro do camarão sete-barbas em Santa Catarina, Brasil.http:// dx.doi.org/10.1590/1676-06032015014314Resumo: Comunidades marinhas em regiõ es tropicais contêm uma grande diversidade de espécies que desempenham papéis-chave em processos ecoló gicos. A fauna acompanhante em pescas artesanais do camarã o sete-barbas Xiphopenaeus kroyeri (Heller, 1862) no Atlâ ntico Sudoeste excede a quantidade de camarõ es comerciais desta espécie capturados. Esta fauna acompanhante nã o foi catalogada de forma detalhada no Brasil, particularmente no Estado de Santa Catarina, onde a pescaria em pequena escala é uma atividade tradicional que domina a economia pesqueira local. Seis municípios foram amostrados três vezes por mês, de 1996 a 2011, capturando 216 espécies pertencentes à fauna acompanhante (7 cnidá rios, 22 moluscos, 42 crustá ceos, 11 equinodermos e 134 peixes). O manejo da fauna acompanhante constitui um aspecto urgente nas pescarias de camarõ es. Ao listar a fauna acompanhante acidental, uma etapa preliminar é executada para a definic¸ã o de medidas de intervenc¸ã o, fazendo melhor uso desta fauna acompanhante na pesca artesanal de camarõ es. A conservac¸ã o da biodiversidade marinha ainda é inadequada no Brasil. Apresentamos uma tentativa de identificar ameac¸as adicionais às espécies vulnerá veis e em risco de extinc¸ã o como resultado das pescas de arrastro. Palavras-chave: fauna acompanhante, diversidade marinha, Atlântico Sudoeste, espécies ameac¸adas, Xiphopenaeus kroyeri.
Brazil. Monthly samples were carried out in the morning, afternoon, and evening using two over-trawls with 6 m at the opening, 3.0-cm mesh at the outer part and 2.0-cm mesh in the bag. Dardanus insignis was collected year round but with higher densities in September and October. The hermit crabs were more abundant during the evening than the afternoon but no di¡erences were recorded between morning and both evening and afternoon. Females were slightly more abundant than males but the sex ratio did not di¡er from 1:1. Females were more abundant in the smallest size-classes (51.8 cm) while males outnumbered females in the largest ones (42.2 cm). The individuals of this population of D. insignis have a mean cephalothoracic length of 1.89 AE0.40 cm (range 1.00 to 3.90 cm) and a mean weight of 40.26 AE27.06 g. The size distribution showed an unimodal pattern, with males being larger than ovigerous females, which, in turn, were larger than non-ovigerous females. Dardanus insignis showed a seasonal reproductive pattern with a peak from September to November and complete absence of ovigerous females from April to August. The von Bertalan¡y growth function (VBGF) with temporal oscillation ¢tted for this population of D. insignis had the following parameters: L 1 ¼4.40 cm, K¼0.60, C¼0.95, WP¼0.35. Recruitment was estimated to start in September and was extended to the following months. Estimates of longevity ranged from 20 to 62 months. A mortality rate of 2.21 was estimated based on the length converted catch curve. The cephalothoracic length of males and females showed, respectively, positive and negative allometry with both cephalothoracic width and crab weight.
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