Cellular and biochemical responses of the oyster Crassostrea gigas to controlled exposures to metals and Alexandrium minutum

Jan 15, 2014Aquatic toxicology (Amsterdam, Netherlands)

Cell and chemical responses of the oyster Crassostrea gigas to controlled exposure to metals and harmful algae

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Abstract

Oysters exposed to cadmium and copper accumulated about 36 times less Paralytic Shellfish Toxins than those exposed to the harmful dinoflagellate alone.

  • Simultaneous exposure to cadmium and copper altered lipid composition in the digestive gland of oysters, indicating possible disruptions in lipid metabolism.
  • Hemocytes in oysters exposed to metals showed increased concentrations and dead cell percentages, alongside heightened phenoloxidase activity.
  • Reactive oxygen species production in hemocytes decreased in response to metal exposure.
  • Feeding on the harmful dinoflagellate led to significant reductions in certain lipid types while increasing hemocyte concentration and phagocytic activity.

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