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Microplastics Uptake and Egestion Dynamics in Pacific Oysters, Magallana Gigas (Thunberg, 1793), Under Controlled Conditions
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Researchers studied how Pacific oysters (Magallana gigas) ingest and egest microplastics under controlled conditions, finding that ingestion rates were rapid and dose-dependent while egestion was slower, resulting in temporary accumulation that increases the oysters' exposure to adsorbed pollutants and pathogens during the retention period.
Microplastics have been considered to be dangerous for aquatic organisms’ health (Alomar et al. 2017). Indeed, their accumulation by ingestion can lead to increased exposure to pollutants and pathogens, and effects on physiological activities linked to nutrient...
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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.
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.
A Quantitative Analysis of Microplastic Ingestion in Northern New York Bivalves
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Researchers quantified microplastic ingestion in bivalves collected from northern New York waterways, measuring particle counts and types across multiple species. Bivalves are filter feeders that bioaccumulate microplastics directly from their environment, making them both sentinels of freshwater contamination and a dietary exposure route for humans who consume shellfish.
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