Oxidative stress biomarkers, physiological responses and proteomic profiling in oyster (Crassostrea gigas) exposed to microplastics with irregular-shaped PE and PET microplastic

Physiological impacts of microplastics on the Pacific oyster Crassostrea gigas: The role of particle size and concentration

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Laboratory experiments on Pacific oysters exposed to microplastics of varying sizes and concentrations found decreased survival rates, increased oxygen consumption, and histological damage to digestive and gill tissues, with effects scaling with concentration. Oysters are global seafood staples and efficient bioaccumulators, meaning physiological damage at environmentally relevant concentrations translates directly into concerns about both aquatic ecosystem health and the safety of oysters in the human diet.

Molecular and cellular effects of nano- and microplastics on oysters: a review

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Researchers reviewed the ecotoxicological effects of nano- and microplastics on oysters, finding that while high concentrations cause measurable physiological and cellular harm, there is a critical lack of studies at environmentally realistic exposure levels needed to accurately predict ecological consequences.

The impacts of PVC microplastics on physiology and transcriptomic responses of pearl oyster Pinctada fucata martensii

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Pearl oysters (Pinctada fucata martensii) exposed to PVC microplastics for 10 days showed elevated superoxide dismutase activity and significant transcriptomic changes across multiple biological pathways, with oxidative stress partially reversing during a 6-day recovery period. The disruption of antioxidant defenses and broad gene expression changes in commercially farmed oysters at environmentally relevant PVC concentrations raises concerns about microplastic impacts on aquaculture productivity and the safety of shellfish consumed by humans.

Disruption of energy metabolism in the Pacific oyster (Crassostrea gigas) by co-exposure to aged microplastics and pathogenic Vibrio spp

The Effects of different concentrations of microplastics based on the feeding ability rate of oysters

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Researchers found that oysters exposed to microplastic concentrations above 5 mg/L showed significantly reduced feeding and filtration rates, with higher concentrations causing greater disruption, suggesting that microplastic pollution could impair the health and ecosystem function of commercially and ecologically important shellfish.