Seletividade das malhadeiras sobre as principais espécies de peixes capturadas nas várzeas do Rio Madeira (Rondônia, Brasil)
DOI:
https://doi.org/10.20950/1678-2305/bip.2023.49.e841Palavras-chave:
Bacia Amazônica, Pesca artesanal, Peixes juvenis, Multiespécies, Seletividade malhadeiraResumo
A pesca artesanal nas várzeas da bacia Amazônica tem se intensificado, sendo a rede de emalhar um dos principais tipos de apetrechos utilizados. Neste estudo, avaliamos a estrutura de comprimento das espécies de peixes em um lago de várzea da bacia do rio Madeira, enfatizando a seletividade das redes sobre as principais espécies capturadas. As pescarias foram coletadas em períodos de águas altas e baixas, com redes de malhas de 40, 60, 80, 100, 120 e 160 mm. Foram realizados testes entre os períodos e também comparando as malhas, também foram estimados os parâmetros das curvas de seletividade com o código de cálculo SELECT. São apresentados registros de 17 novos comprimentos máximos. Das 12 espécies mais abundantes, a seletividade das redes nos comprimentos modais para Anchovia surinamensis foi de 13,3; 19,9; 26,6 e 33,2 cm nas redes com malhas de 40, 60, 80 e 100 mm, respectivamente. Nas três menores malhas, os valores para Potamorhina altamazonica foram 12,7; 19,0 e 25,3 cm e para Pellona flavipinnis foram 15,4; 23,2 e 30,9 cm. Nas duas menores panagens, foram apresentados os seguintes valores para as espécies Potamorhina latior (12,9 e 19,4 cm), Potamorhina rutiloides (11,3 e 16,9 cm), Triportheus elongatus (19,7 e 29,5 cm), Triportheus flavus (14,1 e 21,1 cm) e Pimelodus blochii (15,5 e 23,0 cm). As estimativas de seletividade das malhadeiras, além de serem informações básicas para as ciências pesqueiras, também são fundamentais para o manejo dos estoques pesqueiros amazônicos.
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Copyright (c) 2023 Severino Adriano de Oliveira Lima, Marcondes Agostinho Gonzaga Junior, Raniere Garcez Costa Sousa
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