Trophic transfer of trace elements in a euryhaline fish, the turbot Scophthalmus maximus: Contrasting effects of salinity on two essential elements

MARINE POLLUTION BULLETIN

卷:154

Article

Pouil, Simon^1,2  Oberhansli, Francois¹  Bustamante, Paco^2,3  Metian, Marc¹ 

[1] IAEA, Environm Labs, 4a, MC-98000 Quai Antoine Ier, Monaco

[2] La Rochelle Univ, Littoral Environm & Soc LIENSs, UMR 7266, CNRS, 2 Rue Olympe Gouges, F-17000 La Rochelle, France

[3] Inst Univ France, 1 Rue Descartes, F-75005 Paris, France

关键词: Diet;    Metals;    Teleost;    Zinc;    Manganese;    Salinity;   

DOI  :  10.1016/j.marpolbul.2020.111065

来源: Elsevier

【 摘 要 】

Trace elements can be accumulated from coastal environment by aquatic organisms from their food and be transferred throughout the food webs. Studying the effects of salinity on the trophic transfer of trace elements in a euryhaline fish, able to deal with large variations in salinity, is therefore key to understand their dynamics in aquatic environments. In this context, we investigated the potential influence of salinity on the trophic transfer of two essential elements (Mn and Zn) in the euryhaline fish, the turbot Scophthalmus maximus using radiotracer techniques. After acclimation to three salinities (10, 25 and 38), turbots were fed with radiolabelled pellets (Mn-54 and Zn-65). Kinetic parameters of depuration were determined after a 21-d period and trophic transfer factors were calculated. Trophic transfer of Mn at the highest salinity was significantly lower than for the other conditions whereas salinity did not significantly influenced Zn trophic transfer. Differences in the processes involved in the regulation (homeostasis) of the two tested trace elements may explain the contrasting influence of seawater salinity for Mn and Zn.

【 授权许可】

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