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  • Title: Difference of mercury bioaccumulation in red mullets from the north-western Mediterranean and Black seas.
    Author: Harmelin-Vivien M, Cossa D, Crochet S, Bănaru D, Letourneur Y, Mellon-Duval C.
    Journal: Mar Pollut Bull; 2009 May; 58(5):679-85. PubMed ID: 19201429.
    Abstract:
    The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta(15)N) 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(15)N occurred in all species. Increase in Hg concentration with delta(15)N 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.
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