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Elasmobranch bycatch distributions and mortality: insights from the European tropical tuna purse-seine fishery ArchiMer
Clavareau, Lyndsay; Sabarros, Philippe; Escalle, Lauriane; Bach, Pascal; Abascal, Francisco J.; Lopez, Jon; Murua, Hilario; Pascual Alayon, Pedro J.; Ramos, Maria Lourdes; Ruiz, Jon; Mérigot, Bastien.
Despite bycatch of elasmobranch (sharks and rays) being a major concern in most fisheries worldwide, there is a lack of knowledge on their spatio-temporal species distribution, biology (life stage and sex-ratios), as well as their at-haulback mortality rate. Observer data from the French and Spanish tropical purse-seine tuna fisheries operating in the Eastern Atlantic and Western Indian Oceans between 2005 and 2017 were analysed to investigate elasmobranch bycatch. Data included 24 elasmobranchs species and distribution patterns of catch per unit of effort (CPUE) by species and sex-ratio were found to vary with life stages, areas, seasons and fishing modes. In general, higher catches were found in FAD-associated sets (>40%) than free tuna school sets...
Tipo: Text Palavras-chave: Biodiversity; Spatio-temporal distribution; Life stage; Sex ratio; At-haulback mortality.
Ano: 2020 URL:
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