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Microplastics in Scylla Serrata: A baseline study from southwest India
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Researchers examined microplastic contamination in the mud crab Scylla serrata from mangrove habitats on India's southwestern coast and found an average of about 29 microplastic particles per individual. Fibers were the dominant type, and polypropylene and polyethylene were the most common polymers detected. The study establishes a baseline for microplastic presence in a commercially important crab species, raising questions about potential human exposure through seafood consumption.
Scylla serrata plays a crucial role in India's seafood exports yet there exists limited understanding on the occurrence of microplastics (MPs) in these crabs. In this baseline study, we examined the presence of microplastics in the digestive tracts of S. serrata collected from the Kota mangroves, southwestern coast of India. Our analysis revealed the presence of 264 MPs in all the samples with an average (± standard deviation) of 29.33 (±11.53) MPs/Individual. The most dominant categories were fibres (98.86 %) and fragments (1.14 %). Primarily 0.1-0.3 mm (50.90 %) and 0.3-1 mm (37.65 %) size range dominated. The predominant polymers were polypropylene (33.71 %), high-density polyethylene (31.44 %), and polyethylene terephthalate (17.80 %). Scanning electron microscopy revealed extensive weathering on the surface of the microplastics. Risk assessments indicated severe risks to S. serrata due to microplastic ingestion emphasizing the need to protect delicate ecosystems like mangroves and the biota within.
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The Mud Crab Buffet: Microplastics pollution in Scylla Serrata from Kota Mangroves
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Researchers recovered 264 microplastic particles from the guts of mud crabs (Scylla serrata) collected from mangroves in Karnataka, India, averaging about 29 particles per crab, with polypropylene, high-density polyethylene, and polyester being the dominant plastics. A hazard index assessment rated the microplastic contamination as a severe risk to the crabs, underscoring the threat to mangrove ecosystems and the seafood that humans consume from them.
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