Distribution of mercury species in different tissues and trophic levels of commonly consumed fish species from the south Bay of Biscay (France)

Type Article
Date 2021-05
Language English
Author(s) Mille Tiphaine1, Bisch Amaëlle1, Caill-Milly NathalieORCID2, Cresson PierreORCID3, Deborde Jonathan4, Gueux Aurore4, Morandeau GillesORCID2, Monperrus Mathilde1
Affiliation(s) 1 : Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM-MIRA, UMR 5254, 64600 Anglet, France
2 : Ifremer, LITTORAL, Laboratoire Environnement Ressources d'Arcachon, 64600 Anglet, France
3 : Ifremer, Centre Manche Mer du Nord, Laboratoire Ressources Halieutiques Manche Mer du Nord, 150 quai Gambetta, 62200 Boulogne sur Mer, France
4 : Ifremer, LITTORAL, Laboratoire Environnement et Ressources des Pertuis Charentais (LER/PC), BP133, 17390 La Tremblade, France
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2021-05 , Vol. 166 , P. 112172 (8p.)
DOI 10.1016/j.marpolbul.2021.112172
WOS© Times Cited 2
Keyword(s) Methylmercury, Contamination, Organotropism, Bioaccumulation, Teleostei
Abstract

Mercury (Hg) is a contaminant of global concern in marine ecosystems, notably due to its ability to accumulate and concentrate in food webs. Concentrations of total mercury (THg), methylmercury (MeHg) and inorganic mercury (IHg) were assessed and compared in different tissues (liver, muscle, and gonads) of three common fish species (hake Merluccius merluccius, red mullet Mullus surmuletus, and sole Solea solea) from the continental shelf from the southern part of the Bay of Biscay. Several studies investigated Hg concentration in fish muscle, but few assessed concentrations in other organs, despite the importance of such data to understand contaminant organotropism and metabolization. Results showed that trophic position and feeding habitat are required to understand the variability of Hg concentration in muscle between fish species. In addition, high MeHg/THg ratio in muscle could be explained by the predatory behavior of the studied fish species and the biomagnification of this Hg species within the food web, MeHg. Despite differences between species, Hg concentration was always higher in muscle (from 118 ± 64 to 338 ± 101 ng g−1 w.w.) and liver (from 122 ± 108 to 271 ± 95 ng g−1 w.w.). These results can be related to physiological processes especially the MeHg detoxification strategies.

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Mille Tiphaine, Bisch Amaëlle, Caill-Milly Nathalie, Cresson Pierre, Deborde Jonathan, Gueux Aurore, Morandeau Gilles, Monperrus Mathilde (2021). Distribution of mercury species in different tissues and trophic levels of commonly consumed fish species from the south Bay of Biscay (France). Marine Pollution Bulletin, 166, 112172 (8p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2021.112172 , Open Access version : https://archimer.ifremer.fr/doc/00681/79330/