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Combined effects of temperature and copper and S-metolachlor on embryo-larval development of the Pacific oyster, Crassostrea gigas

Abstract : This study evaluates the combined effects of two contaminants (copper and a herbicide S-metolachlor) and temperature on the early life stages of the Pacific oyster Crasssotrea gigas,which is native to Arcachon Bay (southwest France). The responses of D-larvae, obtained fromwild and cultivated oysters,were investigated for one year during the oyster breeding period at different sampling sites and compared with the response of D-larvae from a commercial hatchery. Embryotoxicity was measured by considering the percentage of abnormal D-shaped larvae. Normal development of embryos occurred only from 22 °C to 26 °C. There were synergistic effects of copper at low and high temperatures. Native oysters appear particularly sensitive to an increase in water temperature, suggesting a future increase in the percentage of larval abnormalities as a result of global climate change. Hatchery oysters represent a good alternative model for studying the effects of both pollutants and climate change stressors.
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https://hal.inrae.fr/hal-02606315
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Submitted on : Saturday, May 16, 2020 - 12:13:34 PM
Last modification on : Wednesday, November 17, 2021 - 12:27:18 PM

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P. Gamain, P. Gonzalez, J. Cachot, C. Clerandeau, Nicolas Mazzella, et al.. Combined effects of temperature and copper and S-metolachlor on embryo-larval development of the Pacific oyster, Crassostrea gigas. Marine Pollution Bulletin, Elsevier, 2017, 115, pp.201-210. ⟨10.1016/j.marpolbul.2016.12.018⟩. ⟨hal-02606315⟩

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