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Microplastics impact assessment on Langkawi Island off Strait of Malacca waters using rock Oyster as bioindicator
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This study assessed microplastic contamination in rock oysters and coastal sediments at five sites along Langkawi Island, Malaysia, using an improved digestion protocol and ATR-FTIR polymer identification. Microplastic concentrations ranged from 0.47 to 1.0 items per gram wet weight in oysters, with thread-like shapes dominant.
Microplastics (MPs) assessment was conducted in five sites along Langkawi Island off Strait of Malacca coastal shoreline. In this paper, an improved protocol of digestion for soft tissue digestion and multi-steps of MPs identification had been developed and the polymer identification of MPs are performed by ATR-FTIR. Number of MPs found varied from 0.47 to 1.0 items/w. weight (g) and 0.73 to 1.47 items/individual of rock oysters. The MPs composition was dominated by threadlike shapes and the color found are black, blue, red, grey, and yellow. Size of MPs ranging between 500 to 1000 µm and based on MPs polymer analysis, polymers identified are PVDF, PP and PET. The overall abundancy of MPs in bivalve found in Langkawi is 1.46 ± 0.007 items/w. weight (g), however, it is still necessary to do periodic monitoring in this tourists’ attraction island that is well-known for seafood.
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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.
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Researchers examined microplastic contamination in rock oysters from coastal waters around Langkawi and Penang islands in Malaysia. They found microplastics in all samples, with varying levels of contamination between the two locations. The study assessed potential health risks from consuming these shellfish, suggesting that bivalves from these waters may be a pathway for human microplastic exposure.
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 Contamination and Potential Health Risks in the Newly Identified Oyster Crassostrea (Magallana) saidii from Malaysia’s Muar River Estuary
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Researchers investigated microplastic contamination in a newly identified oyster species from Malaysia's Muar River estuary and found that microplastic abundance increased with oyster age, from about 3.4 particles in juveniles to 11.6 in adults. Fibers were the most common microplastic type, making up 58% of particles found. Health risk assessments indicated low to moderate hazard levels, and the study suggests this oyster species could serve as a useful bioindicator for monitoring estuarine microplastic pollution.
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Three commercially harvested shellfish species from Pantai Remis, Malaysia contained microplastics with varying density, color, size, and polymer composition by species, raising food safety concerns about MP exposure through seafood consumption.
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