Data/hora: 01/06/2024 18:29:47

Provedor de dados: | 5
País: | France
Título: | Estimates of selectivity for eastern Atlantic bluefin tuna from catch curves
Autores: | Restrepo, Victor R; Ortiz De Urbina, J; Fromentin, Jean-marc; Arrizabalaga, Haritz.
Data: | 2007
Ano: | 2007
Palavras-chave: | Gear selectivity; Stock assessment; Bluefin tuna.
Resumo: | Knowledge of gear-specific selectivity patterns can be useful in age-structured analyses. In recent assessments of eastern Atlantic bluefin tuna, Thunnus thynnus, the SCRS has derived selectivity estimates from the results of virtual population analyses. This document proposes an alternative approach, based on equilibrium catch curves, that is simple to apply and that relies on a smaller set of assumptions. The study uses the catch-at-age data from the last assessment conducted in 2002, and estimates recent and historical selectivity patterns for the total stock as well as some of the major gears (trap, baitboat, purse seine and longline). The resulting estimates seem reasonable for the various gears, given prior knowledge. The document also presents selectivity estimates for Spanish traps based on trap CPUE-at-size data for 1992-2004.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00192/30326/28800.pdf
Editor: | ICCAT
Relação: | http://archimer.ifremer.fr/doc/00192/30326/
Formato: | application/pdf
Fonte: | Collective Volume of Scientific Papers (1021-5212) (ICCAT), 2007 , Vol. 60 , N. 3 , P. 937-948
Fonte: | ICCAT