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The importance of the age when evaluating mercury pollution in fishes: the case of Diplodus sargus (Pisces, Sparidae) in the NW Mediterranean

1 Departament de Ciències Ambientals, Faculty of Science, University of Girona, M. Aurèlia Capmany 69, 17003 Girona, Spain
2 Departament de Biologia, Sanitat i Medi Ambient, University of Barcelona, Barcelona, Spain
3 Institut de Recerca de la Biodiversitat, University of Barcelona, Barcelona, Spain

Special Issues: Environmental Chemistry and Toxicology of Mercury

The aim of this study was to analyse the concentration of mercury (Hg) in the muscle of a common littoral, omnivorous fish such as the white seabream, Diplodus sargus, and to evaluate its relationship with the age and size of the specimens. Large, older predatory fishes have typically been the main target species for risk assessment of Hg intake in humans. The white seabream is neither a big fish nor a predator, but all sizes of NW Mediterranean specimens of this species showed high levels of Hg, with clear increases in older specimens. In addition, although the Se:Hg molar ratio was high and could reduce the impact of high concentrations of Hg in smaller fishes, it could not in the older specimens of D. sargus analysed because it decreased with age. This is not a major concern for human health because the white seabream is not a widely consumed species. However, in special situations involving toddlers, children and women of childbearing age, problems might arise if the white seabream or similar species are consumed in place of those that current recommendations advise against eating. In these cases it is very important to consider the species of fish consumed in each country and carefully assess the risk of Hg intake.
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Keywords Diplodus sargus; age; mercury; selenium; size; NW Mediterranean

Citation: Margarida Casadevall, Conxi Rodríguez-Prieto, Jordi Torres. The importance of the age when evaluating mercury pollution in fishes: the case of Diplodus sargus (Pisces, Sparidae) in the NW Mediterranean. AIMS Environmental Science, 2017, 4(1): 17-26. doi: 10.3934/environsci.2017.1.17

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This article has been cited by

  • 1. Roberto Merciai, Conxi Rodríguez-Prieto, Jordi Torres, Margarida Casadevall, Bioaccumulation of mercury and other trace elements in bottom-dwelling omnivorous fishes: The case of Diplodus sargus (L.) (Osteichthyes: Sparidae), Marine Pollution Bulletin, 2018, 136, 10, 10.1016/j.marpolbul.2018.08.061

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Copyright Info: 2017, Margarida Casadevall, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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