Avaliação Do Tamanho De Captura E Estimativa Da Abundância Do Camarãorosa Farfantepenaeus Paulensis (Pérez Farfante 1967) No Entorno Da Ilha Dos Marinheiros, Estuário Da Lagoa Dos Patos, Rs, Brasil

Abstract

CEP: 96201-900-Caixa postal: 474. RESUMO O camarão-rosa Farfantepenaeus paulensis utiliza o estuário da Lagoa dos Patos durante o seu desenvolvimento juvenil, e neste ambiente torna-se um importante recurso para a pesca artesanal. Neste trabalho foram analisados os tamanhos dos camarões capturados pelas redes de "saquinho"; e a abundância relativa (CPUE) dos juvenis e pré-adultos em três áreas distintas, no entorno da Ilha dos Marinheiros, durante a safra pesqueira de 2009 (fevereiro a maio). Foram tomadas as medidas do comprimento da carapaça, através das quais se estimou o percentual de camarões com tamanho inferior ao permitido por lei. A CPUE foi estimada em três áreas adjacentes através das informações de desembarque da pesca artesanal. As variações diárias da salinidade foram acompanhadas durante o período de pesca através de coleta manual de água. Em todas as áreas, durante toda a safra, as capturas de camarões com tamanho inferior ao permitido por lei foram superiores ao percentual permitido. A CPUE mostrou-se significativamente diferente entre as áreas. As maiores abundâncias ocorreram nos dois primeiros meses de safra.

Habitat use in different life and moulting stages of Callinectes sapidus (Decapoda, Portunidae) in South Brazilian estuarine and marine environments

“…(2016) for the protection of shallow areas of the PLE, we suggest adding special protection for the recruitment areas of the spatial overlay of several groups such as the embayment around Marinheiros Island, where Torotama and Porto Rei are located. However, this region is also an important area for local fishers (Ruas, 2015; Thykjaer et al ., 2019), and is profoundly impacted by illegal shrimp trawl fisheries (Rezende et al ., 2015). In this sense, we suggest (1) better promotion of efforts to study the communities of all shallow areas of this embayment to give complete tools for management stakeholders, (2) enforcement of environmental regulations and (3) taking new management decisions in conjunction with scientific researchers, government and fishermen, to better protect this area from anthropogenic impacts, establishing accurate measures for sustainable fisheries.…”

Distribution and abundance of post-larvae and juvenile pink shrimpFarfantepenaeus paulensis(Pérez Farfante, 1967) in a subtropical estuary

“…According to D'Incao & Dumont (2010) and Ruas et al . (2011), stable salinity levels are an important environmental factor associated with the greatest abundances of juveniles. Therefore, lower abundances of juveniles at unprotected sites may be due to more variable environmental conditions (Martins et al ., 2007; Costa et al, 2008; D'Incao & Dumont, 2010).…”

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

“…This migration was mentioned by D'Incao (1991) as a consequence of the search for more favorable areas for feeding and protection. Almeida and D'Incao (1999) analyzed fishermen migrations to areas of greater production which shows indirectly the space and time variation on the shrimp abundance as presented by Ruas et al (2011) for the artisanal fishery. The theory that the shrimp displays migration patterns on the estuary during the juvenile phase was difficult to prove and there are no studies that show this effect or in which stage of development (postlarvae or juvenile) this behavior occurs.…”

“…Possible differences could be found with a larger time period for data sampling: a longer growth period of the species in the estuary (D'Incao, 1984); the migrations of larger individuals to the ocean (D'Incao, 1990) and the pressure of the fishery when it is allowed from February onwards (Ruas et al, 2011).…”

“…The author indicates the greatest abundance of the pink shrimp is found in the estuarine inlets, where supply of food is higher, and which provides refuge from predators. The spatial variations in relative abundance associated with fishery activities may indicate variations in the abundance of juveniles among the estuarine inlets (Ruas et al, 2011).…”