Pesticide mixture toxicity assessment through in situ and laboratory approaches using embryo-larval stages of the pacific oyster (Magallana gigas)
Language English Country England, Great Britain Media print-electronic
Document type Journal Article
PubMed
34174543
DOI
10.1016/j.marenvres.2021.105390
PII: S0141-1136(21)00146-X
Knihovny.cz E-resources
- Keywords
- Arcachon bay, Coastal waters, Developmental abnormality, Gene expression, In situ, Mixtures, Pacific oyster, Pesticides, Sublethal effects, Swimming behavior,
- MeSH
- Water Pollutants, Chemical * toxicity MeSH
- Crassostrea * MeSH
- Laboratories MeSH
- Larva MeSH
- Pesticides * toxicity MeSH
- Animals MeSH
- Check Tag
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Water Pollutants, Chemical * MeSH
- Pesticides * MeSH
Worsened state of oysters in French Arcachon Bay, demand an investigation of possible causes. This study evaluated the effects of an environmentally relevant mixture of five common pesticides on the early-life stages of the Pacific oyster (Magallana gigas). Laboratory assays with artificial mixture and in situ transplantation were complementarily used to investigate a series of sublethal endpoints. The laboratory exposure revealed developmental toxicity at 0.32 μg/L, which corresponds to mixture concentrations in Arcachon Bay. Downregulation of some gene transcriptions was observed at environmental level. No difference in larvae development was revealed among the three sites in Arcachon Bay. This study was the first to evaluate locomotion of oyster larvae exposed in situ. Suspected poor water quality in the inner part of Arcachon Bay was reflected by impairment at the molecular level. In conclusion, current concentrations of the tested pesticides in Arcachon Bay hinder larval development and affect several biological functions.
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