Effect of zinc sacrificial anode degradation on the defence system of the Pacific oyster, Crassostrea gigas : Chronic and acute exposures

International audience Two types of exposures were performed to assess the effects of zinc released from sacrificial anode degradation: a chronic exposure, in which oysters were exposed to 0.53 ± 0.04 mg Zn L−1 for 10 weeks, and an acute exposure, where oysters were exposed to 10.2 ± 1.2 mg Zn L−1 f...

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Bibliographic Details
Published in:Marine Pollution Bulletin
Main Authors: Mottin, Elmina, Caplat, Christelle, Latire, Thomas, Mottier, Antoine, Mahaut, Marie-Laure, Costil, Katherine, Barillier, Daniel, Lebel, Jean-Marc, Serpentini, Antoine
Other Authors: Interactions Cellules Organismes Environnement (ICORE), CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut de Biologie Fondamentale et Appliquée Caen (IBFA), Biologie des mollusques marins et des écosystèmes associés (BioMEA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Biologique (LCB), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Institut national des sciences et techniques de la mer (INTECHMER), Conservatoire National des Arts et Métiers CNAM (CNAM)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2012
Subjects:
Zinc
Sacrificial anode
Crassostrea gigas
Laboratory exposures
Immune parameters
mRNA expression
[SDE]Environmental Sciences
Pacific
Pacific oyster
Online Access:https://hal-normandie-univ.archives-ouvertes.fr/hal-02314104
https://doi.org/10.1016/j.marpolbul.2012.06.017
Description
Summary:International audience Two types of exposures were performed to assess the effects of zinc released from sacrificial anode degradation: a chronic exposure, in which oysters were exposed to 0.53 ± 0.04 mg Zn L−1 for 10 weeks, and an acute exposure, where oysters were exposed to 10.2 ± 1.2 mg Zn L−1 for 1 week. At the end of the acute exposure experiment, 81.8% mortality was recorded. In contrast, no mortality was detected after 10 weeks exposure. Moreover, all of the immune system biomarkers studied, except the number of circulating haemocytes, were stimulated by a moderate level of zinc and inhibited by a high level. Our exposure conditions did not induce SOD or MXR mRNA expression in gills and digestive gland. However, an increase of MT mRNA is observed in these tissues. The results indicate that oysters are sensitive to acute zinc toxicity but are only moderately affected by a mild zinc concentration.

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