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Microplastic Concentration in Mediterranean Commercial Fish: A Systematic Review
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This systematic review examines microplastic levels in five commercially important fish species caught in Mediterranean waters. The findings confirm that microplastics are routinely present in popular seafood, with concentrations varying by species and location, underscoring the need to monitor and reduce plastic contamination in fish that millions of people eat regularly.
Nowadays, microplastic (MP) pollution has attracted increasing interest from the scientific community. This systematic review investigated the MP concentration in various tissues of five commercial fish species (Engraulis encrasicolus, Boops boops, Sardina pilchardus, Sardinella aurita, and Trachurus mediterraneus) in different Mediterranean water bodies in order to identify spatial trends and key analytes influencing their variation. The reported concentrations of MPs in all fish ranged from 4.2 particles/individual in the southeastern Mediterranean to 1.2 particles/individual in the western part, but these values are highly uncertain due to inconsistent methodologies, absence of recovery tests, and incomplete data reporting. No significant difference was found in the MP concentration of the different tissues of these species. The key factor affecting the MP concentration was the water body from which they were collected. This systematic review suggests that fewer than six samples may not provide statistically reliable results, and that a lack of detailed data reporting, despite the advances in chemical characterization techniques, continues to limit the robustness of MP studies. Additionally, this study evaluated how methodological differences could influence the reported MP concentrations. These findings offer a comprehensive overview of the MP expansion in the Mediterranean waterbodies and fish species, and provide recommendations for future research design improvement.
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This literature review covers studies from 2015 to 2021 on the presence of microplastics in commercially important fish species from the Mediterranean Sea, one of the most plastic-polluted water bodies in the world. It also synthesizes data on microplastic concentrations in Mediterranean beach sediments, subtidal sediments, seafloor sediment, and surface water.
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This systematic review examines microplastic contamination levels in commercially important fish species and the potential health impacts. The findings reveal that microplastics are commonly found in fish consumed by humans, raising concerns about chronic exposure through seafood and the possibility that these particles carry harmful chemicals into our bodies.
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Researchers analyzed fillets of several common Mediterranean seafood species for microplastic contamination and estimated the associated human dietary exposure. They detected microplastics in the edible tissue of all species tested, including sardines, sea bream, and mussels. The study provides risk estimates suggesting that regular seafood consumption represents a notable pathway for human microplastic ingestion.
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