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Microplastics (MPs) toxicity in fish: functional tissues response
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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.
Toxicity of nano- and microplastics on marine and freshwater fish: A multi-scale perspective from organ systems to cells
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This review pulls together existing studies showing that tiny plastic particles (micro- and nanoplastics) can build up in fish, damaging their gut, gills, heart, brain, and immune system by causing inflammation and cellular stress. While this research was done in fish, it matters for us too, since these plastics are widespread in water and seafood, and fish share many biological similarities with humans, meaning our bodies could face similar risks from ongoing plastic exposure.
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.
Impact of Microplastics on Reproductive and Physiological Aspects of Aquatic Inhabitants
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Researchers reviewed how microplastic exposure affects reproduction and physiology in freshwater aquatic organisms, finding that plastic particles disrupt hormonal signaling, reduce fertility, and impair development across a range of sensitive freshwater species.
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