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Wild gudgeons (Gobio gobio) from French rivers are contaminated by microplastics: Preliminary study and first evidence
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Researchers found microplastics in the digestive tracts of wild gudgeons caught from multiple French rivers, with 12% of individuals contaminated. This field study confirms that freshwater fish in European rivers are exposed to real-world microplastic contamination through their natural foraging behavior.
Marine ecosystem contamination by microplastics is extensively documented. However few data is available on the contamination of continental water bodies and associated fauna. The aim of this study was to address the occurrence of microplastics in digestive tract of gudgeons (Gobio gobio) from French rivers. These investigations confirm that continental fish ingested microplastics while 12% of collected fish are contaminated by these small particles. Further works are needed to evaluate the occurence of this contamination.
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Microplastic contamination in gudgeons (Gobio gobio) from Flemish rivers (Belgium)
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Researchers found microplastic contamination in gudgeons (Gobio gobio) from Flemish rivers in Belgium, contributing early evidence of microplastic ingestion in European freshwater fish and highlighting the need for greater attention to plastic pollution in freshwater ecosystems.
Microplastics in gudgeon (Gobio gobio) and roach (Rutilus rutilus) from a Central European small river
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Microplastics were investigated in gudgeon and roach fish species collected from a small Central European river, contributing data on freshwater fish exposure in inland waterways. The study adds to the growing evidence that microplastic ingestion by freshwater fish is widespread across European river systems.
Microplastics in freshwater fish from Central European lowland river (Widawa R., SW Poland)
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More than half of gudgeon and roach fish collected from a small Polish river had ingested microplastic-like particles, with no significant difference by sex, feeding behavior, or location relative to a dam. The findings suggest microplastic ingestion by freshwater fish is widespread and not driven by a single local source.
Occurrence and characterization of microplastic content in the digestive system of riverine fishes
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Researchers found microplastics in 93.8% of riverine fish examined, with polystyrene, polyethylene, and nylon being the most common polymer types concentrated near urban and industrial areas, and small particles (0.025-1 mm) predominating across species.
Characterization and enumeration of microplastic pollution in three fish species of the Upper Mississippi River
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Researchers found 891 microplastic particles across 281 fish from three species in the Upper Mississippi River, with fibers being the most common type and smaller fish containing proportionally more microplastics than larger ones. This confirms microplastic ingestion is widespread in freshwater fish — not just marine species — and the presence of styrene-isoprene, polyester, and ABS polymers highlights the diverse plastic sources contaminating major river systems.
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