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Genetic and genotoxic impacts in the oyster Crassostrea gigas exposed to the harmful alga Alexandrium minutum
Genetic damage and changes in Pacific oysters exposed to the harmful algae Alexandrium minutum
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Abstract
Oysters exposed to a toxin-producing alga showed significant behavioral disturbances after 48 hours at approximately 1600 cells per milliliter.
- Behavioral disturbances included reduced valve-opening amplitude and increased micro-closures.
- The degree of behavioral changes was correlated with the amount of toxin accumulated in the oysters' digestive gland.
- Gene transcription levels in the gills were altered, indicating repression of genes related to metabolism, immunity, and detoxification.
- Both quantitative and qualitative DNA impacts were observed, suggesting genotoxic effects on the oysters.
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