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Microplastic contamination in filter-feeding oyster Saccostrea cuccullata: Novel insights in a marine ecosystem
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Researchers examined microplastic contamination in the filter-feeding oyster Saccostrea cuccullata collected from five coastal sites. They found microplastics present in all oyster specimens, with fibers and fragments being the most common types detected. The study highlights how filter-feeding shellfish can accumulate microplastics from surrounding waters, raising concerns about contamination in marine food chains.
Microplastic (MP) pollution has become a pressing global concern. Oysters are well-known filter feeders who ingest food by filtering microscopic particles suspended in the surrounding water. Along with organic matter, filter-feeding also causes accidental ingestion of MP by oysters. Hence, the aim of the current investigation is to understand the MP contamination in filter-feeding oysters. A total of 500 specimens of oyster Saccostrea cuccullata collected from the intertidal zone of five sampling locations on the Gujarat coast, India. Specimens underwent analysis following established protocols. Each specimen was found to exhibit MP contamination, showing an abundance of 2.72 ± 1.98 MPs/g. A negative relationship was found between shell length and MP abundance. Predominantly, fibers were documented across all study sites. Black, blue, and red-colored MPs with 1-2 mm sizes were most dominant. MP polymer composition was identified as polyethylene terephthalate and polypropylene. Findings provide baseline information on levels of MPs contamination, which can be used to monitor future effects of MP pollution.
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Microplastic contamination in Saccostrea cucullata: a baseline study along the rocky shore in southwest area of Peninsular Malaysia off Strait of Malacca
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Researchers conducted a baseline study of microplastic contamination in rock oysters (Saccostrea cucullata) along eight rocky shore sites in Peninsular Malaysia, finding that 58.5% of detected particles were confirmed microplastics, providing early data on plastic uptake in sessile filter feeders.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
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Researchers evaluated microplastic accumulation and effects in European flat oysters under controlled exposure conditions, examining how filter feeding concentrates plastic particles and whether ingestion impairs oyster health. Exposure resulted in measurable microplastic accumulation in oyster tissue, with effects observed on feeding behavior and physiological condition.
Microplastic contamination in Saccostrea cucullata: a baseline study along the rocky shore in southwest area of Peninsular Malaysia off Strait of Malacca
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Rock oysters (Saccostrea cucullata) from eight rocky shores along the Strait of Malacca, Peninsular Malaysia were analyzed for microplastic contamination, finding that 58.5% of detected particles were identified as synthetic polymers by ATR-FTIR. The study established a baseline for microplastic contamination in this sessile filter feeder along a heavily trafficked shipping route.
Microplastics in oysters Saccostrea cucullata along the Pearl River Estuary, China
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Microplastics were found in oysters from multiple sites along the Pearl River Estuary in China, with concentrations varying by site and correlating with local microplastic levels in surrounding water. The results indicate that farmed and wild oysters in this heavily polluted estuary accumulate microplastics that could reach consumers.
MICROPLASTICS FOUND IN THE EASTERN OYSTER (Crassostrea virginica) AND THE SURROUNDING ENVIRONMENT
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Eastern oysters and surrounding water and sediment samples were collected from a US estuary and analyzed for microplastic content. Microplastics were found in both oysters and environmental matrices, though the oysters did not accumulate particles proportionally to environmental concentrations, suggesting selective ingestion. The study contributes to understanding how commercially important bivalves interact with microplastics in their natural habitat and what this means for seafood safety.
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