Difference of mercury bioaccumulation in red mullets from the north-western Mediterranean and Black seas

Type Article
Date 2009-05
Language English
Author(s) Harmelin-Vivien M.1, Cossa Daniel2, Crochet Sylvette3, Banaru D.1, Letourneur Y.1, Mellon-Duval Capucine4
Affiliation(s) 1 : Univ Aix Marseille 2, Ctr Oceanol Marseille, CNRS, Marine Endoume Stn,UMR 6540, F-13007 Marseille, France.
2 : IFREMER, Ctr Mediterranee, F-83507 La Seyne Sur Mer, France.
3 : IFREMER, Ctr Nantes, Nantes 3, France.
4 : IFREMER, Ctr Rech Halieut Mediterraneenne & Trop, F-34203 Sete, France.
Source Marine Pollution Bulletin (0025-326X) (Elsevier), 2009-05 , Vol. 58 , N. 5 , P. 679-685
DOI 10.1016/j.marpolbul.2009.01.004
WOS© Times Cited 55
Keyword(s) Black Sea, Mediterranean, Mullidae, Methylmercury, Trophic level, N 15
Abstract The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta N-15) were evaluated in Mullus barbatus barbatus and M. surmuletus from the Mediterranean Sea and M. barbatus ponticus from the Black Sea. Mercury concentration in fish muscle was six times higher in the two Mediterranean species than in the Black Sea one for similar sized animals. A positive correlation between Hg concentration and delta N-15 occurred in all species. Increase in Hg concentration with delta N-15 was high and similar in the two Mediterranean fishes and much lower in the Black Sea species. Since this was neither related to trophic level difference between species nor to methylmercury (MeHg) concentration differences between the north-western Mediterranean and the Black Sea waters, we suggested that the higher primary production of the Black Sea induced a dilution of MeHg concentration at the base of the food webs. (c) 2009 Elsevier Ltd. All rights reserved.
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