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Microplastic Contamination in Shrimps from the Negombo Lagoon—Sri Lanka
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Researchers analyzed microplastic contamination in two species of shrimp from Sri Lanka's Negombo Lagoon, examining both gastrointestinal tracts and gills. The study found microplastics present in all sampled shrimp, raising concerns about human dietary exposure to microplastics through seafood consumption in coastal communities.
Microplastic (MP) pollution is a serious global issue affecting freshwater systems, coastal regions, and oceans. These non-biodegradable materials have a detrimental impact on marine species and ecosystems, disrupting their feeding, breathing, and reproduction. In this study, 120 samples of two species of shrimp, Penaus monodon and Penaus indicus, from ten locations in the Negombo lagoon in Sri Lanka were analyzed. MPs were extracted from gastrointestinal tracts (GI) and gills (GL) by alkali digestion followed by vacuum filtering. Stereomicroscopy coupled with advanced micro-imaging and analysis software was employed for analyzing the isolated MPs. A total of 415 items were identified as MPs with an average of 8.29 ± 4.63 items per gram of GI and GL in Penaus monodon and 5.52 ± 3.78 items per gram of GI and GL in Penaus indicus. The majority of MPs identified were fibers (93%), and the remaining ones were fragments. Most of the MPs were >1000 μm, and the most prevalent color was blue (61%), followed by red (15%), black (9%), and others, comprising polystyrene, polyamide, polyester, polypropylene, and rayon, as revealed by FTIR spectroscopy. This study highlights the prevalence of MPs in shrimps harvested from the Negombo lagoon and displays missing baseline data before the effects of fragmented nurdles from the X-Press Pearl incident.
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Microplastic Contamination in Shrimps from the Negombo Lagoon - Sri Lanka
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Researchers analyzed microplastic contamination in 120 samples of two shrimp species (Penaeus monodon and Penaeus indicus) from ten locations in the Negombo Lagoon, Sri Lanka, identifying an average of 8.29 items per gram in P. monodon and 5.52 items per gram in P. indicus. The study documented the types, colors, and sizes of the 415 microplastic items found, providing baseline contamination data for a commercially important coastal lagoon.
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Researchers examined clams and shrimp from estuarine environments in Goa, India, and found microplastics present in both species and their surrounding waters, with shrimp from one site showing particularly high contamination and bioaccumulation. The particles were predominantly polyamide, polyethylene, and polystyrene fibers and fragments, likely originating from fishing, tourism, and waste disposal activities. The findings raise concerns about food safety for local and tourist populations who regularly consume seafood from these coastal areas.
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Researchers assessed microplastic contamination in three commercially available shrimp species purchased from supermarkets in South Australia. They found microplastics present in the digestive tracts of all species examined, with fibers being the most commonly identified type. The findings suggest that commercially harvested seafood represents a potential pathway for human dietary exposure to microplastics.
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