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Abundance and characteristics of microplastics in commercial marine fish from Malaysia
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Microplastics were found in the digestive tracts of eight commercially important marine fish species caught in Malaysian waters, with prevalence and particle types varying by species and location. The study raises food safety concerns for Malaysian seafood consumers and highlights the widespread occurrence of microplastic ingestion in wild-caught fish from Southeast Asian seas.
Plastic debris is widespread and ubiquitous in the marine environment and ingestion of plastic debris by marine organisms is well-documented. Viscera and gills of 110 individual marine fish from 11 commercial fish species collected from the marine fish market were examined for presence of plastic debris. Isolated particles were characterized by Raman spectroscopy, and elemental analysis was assessed using energy-dispersive X-ray spectroscopy (EDX). Nine (of 11) species contained plastic debris. Out of 56 isolated particles, 76.8% were plastic polymers, 5.4% were pigments, and 17.8% were unidentified. Extracted plastic particle sizes ranged from 200 to 34,900 μm (mean = 2600 μm ±7.0 SD). Hazardous material was undetected using inorganic elemental analysis of extracted plastic debris and pigment particles. The highest number of ingested microplastics was measured in Eleutheronema tridactylum and Clarias gariepinus, suggesting their potential as indicator species to monitor and study trends of ingested marine litter.
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Occurrence, distribution and characteristics of microplastics in gastrointestinal tract and gills of commercial marine fish from Malaysia
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Researchers examined 158 commercial marine fish from 16 species in Malaysia and found microplastics in the gastrointestinal tracts and gills of all species studied. Fibers were the most common microplastic type, and the contamination levels varied between sampling locations. The findings add to growing evidence that microplastics are widespread in commercially important fish species, raising questions about the potential for human exposure through seafood consumption.
Microplastic ingestion by commercial marine fish from the seawater of Northwest Peninsular Malaysia
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Researchers examined microplastic ingestion by four species of commercially important marine fish caught off the northwest coast of Peninsular Malaysia. The study found microplastics in the gastrointestinal tracts of the fish, with fibers being the most common type, highlighting the prevalence of microplastic contamination in seafood from this region.
Microplastic fragments in digestive tracts of fish from the coastal waters of Kuantan, Pahang
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Researchers found microplastic fragments in the digestive tracts of five fish species bought at markets in Kuantan, Malaysia, with all species showing contamination. Fibres and fragments were the most common types, indicating widespread microplastic exposure in coastal Malaysian marine environments.
Microplasticcontaminationincommercial marine fish: A case study in Johor, Malaysia
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Researchers examined four species of commercially important marine fish from waters around Johor, Malaysia, and found microplastics present in the flesh of all species sampled. Fibers and fragments were the most common particle types, with polypropylene and polyethylene being the dominant polymers identified. The findings raise concerns about human dietary exposure to microplastics through commonly consumed fish in the region.
Microplastic contamination in pelagic and coastal fish from Malaysian waters: Tissue-specific distribution, polymer characteristics, and environmental risk indicators
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Researchers quantified microplastics in gill, digestive tract, and muscle tissues of two commercially important Malaysian marine fish species, finding MPs in over 86% of individuals with polyethylene and polypropylene fragments predominating; polymer hazard indices indicated low intrinsic polymer risk, but contamination factors revealed substantial ongoing ingestion pressure in digestive tissues, providing baseline data for regional biomonitoring.
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