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Michroplastic-Like Debris and Biomarkers in the Fish Pseudochondrostoma duriense: Preliminary Findings
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Researchers investigating microplastic contamination in the freshwater fish Pseudochondrostoma duriense from the Minho River estuary detected anthropogenic debris particles and measured biomarkers of neurotoxicity, oxidative stress, and metabolic disruption, providing preliminary evidence of microplastic-driven physiological harm in a native Iberian species.
The contamination of the freshwater fish Pseudochondrostoma duriense from the Minho River estuary by anthropogenic debris suspect of being microplastics (MP-S) was investigated. Biomarkers (neurotoxicity, energy-related, biotransformation, oxidative stress, and...
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Microplastics in Juvenile Commercial Fish from an Estuarine Environment
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Juvenile commercial fish from an estuarine environment were found to have ingested microplastics, demonstrating that plastic contamination affects fish at early life stages in transitional coastal ecosystems rather than only in open ocean habitats. Since estuaries serve as nurseries for many commercially important species, microplastic ingestion by juveniles threatens both fish population health and the safety of seafood reaching consumers.
Physiological Alterations and Immune Modulation in Fish Exposed to Microplastics
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Researchers reviewed the physiological and immunological effects of microplastic exposure in fish, finding that these particles smaller than 5 mm induce a range of biological disruptions including immune modulation, oxidative stress, and systemic health impacts with broader implications for aquatic ecosystem integrity.
Current State of Research on the Prevalence of Microplastics in Aquatic Fish and Their Impact on Health
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Researchers reviewed microplastic contamination in fish across all seven continents, finding marine fish were studied 2.6 times more than freshwater species, and that microplastics trigger oxidative stress, alter biochemical pathways, and accumulate through biotransformation in fish tissues globally.
Microplastic in fish – A global synthesis
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A global synthesis of microplastic ingestion data from marine, freshwater, and estuarine fish found that 49% of sampled fish worldwide had ingested plastic, averaging 3.5 pieces per fish, with freshwater fish and those from aquaculture sources showing higher ingestion rates than wild marine fish. This comprehensive analysis reveals that microplastic contamination of fish — a primary human protein source globally — is now the rule rather than the exception, underscoring urgent risks to food safety.
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