期刊
MARINE POLLUTION BULLETIN
卷 64, 期 9, 页码 1911-1920出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.06.017
关键词
Zinc; Sacrificial anode; Crassostrea gigas; Laboratory exposures; Immune parameters; mRNA expression
资金
- Ministere de l'Enseignement Superieur et de la Recherche
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. (c) 2012 Elsevier Ltd. All rights reserved.
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