Produção Nacional
Revisado por pares
Taxas de captura de espadarte e de tubarão azul no Sudoeste do Atlântico entre as décadas de 1980 e 2000
2016; INSTITUTO DE PESCA - APTA - SEC. DE AGR. E ABAST. - SP; Volume: 40; Issue: 4 Linguagem: Inglês
ISSN
1678-2305
AutoresAndré Augusto Guimarães-Silva, Humber Agrelli Andrade,
Tópico(s)Ichthyology and Marine Biology
ResumoSwordfish ( Xiphias gladius ) is one of the main targets of the national and of part of the leased Brazilian pelagic longline fleet. However, the catches of blue shark ( Prionace glauca ) are also high. In order to get more knowledge about the duality of catches of swordfish and blue shark, we analyzed catch data from the Brazilian national and leased fleets from 1980 to 2009. In some of the fishing grounds catch rates of both species are high, but in other areas, only one species is abundantly caught. Leased boats from Japan and China Taipei never aimed at any of those two species hence the catches were always small. However the leased fleet from Spain clearly focuses its actions in areas where catch rates of swordfish are high. The national fleet focuses effort in both, areas where swordfish dominates and areas where catch rates of swordfish and blue shark are concomitantly high. If the intention is to diminish the impact of fishing effort on the population of blue shark, an alternative would be to enforce the fishing fleet to operate only in areas where catch rates of swordfish are high and where catch rates of blue shark are low.
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