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Mercury in blue shark ( Prionace glauca ) and shortfin mako ( Isurus oxyrinchus ) from north-eastern Atlantic: Implication for fishery management ArchiMer
Biton-porsmoguer, Sebastian; Banaru, Daniela; Boudouresque, Charles F.; Dekeyser, Ivan; Bouchoucha, Marc; Marco-miralles, Francoise; Lebreton, Benoit; Guillou, Gael; Harmelin-vivien, Mireille.
Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level...
Tipo: Text Palavras-chave: Mercury; Pelagic sharks; Blue shark; Shortfin mako; Long-line fishery; NE Atlantic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00413/52492/56296.pdf
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