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Exposure to microplastic: ingestion/egestion rates and behavioural impact on Solea solea
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Scientists found that common sole (a fish many people eat) can swallow tiny plastic bits from the water and spit some back out, but the plastic still affects how the fish swim and behave. Since these fish end up on our plates, this raises questions about how microplastics move through the food we eat and what that could mean for our health over time.
International audience
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Characterization of microplastic litter in the gastrointestinal tract of Solea solea from the Adriatic Sea
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Researchers investigated the occurrence and types of microplastic litter in the gastrointestinal tract of sole fish from the Adriatic Sea. They found microplastic particles in a notable proportion of the fish examined, with various polymer types and sizes detected. The study provides evidence that commercially important flatfish species are ingesting microplastics, raising questions about potential implications for both marine ecosystems and seafood safety.
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Researchers exposed juvenile sole fish to ragworms contaminated with microplastics to study effects on behavior and body coloration in estuarine conditions. The study found that microplastic exposure through the food chain caused observable changes in the fish juveniles, suggesting that trophic transfer of microplastics can affect the development and behavior of young fish in estuarine nursery habitats.
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This study examined how microplastics affect fish behavior and growth, finding that fish can ingest them but particles pass through the gut relatively quickly with limited effects at tested concentrations. The research highlights challenges in detecting microplastics in aquatic organisms and suggests risk depends heavily on exposure level and particle type.
Swimming behavior affects ingestion of microplastics by fish
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This study found that swimming behavior in juvenile cichlid fish influenced how many microplastics they ingested, helping explain the high individual variation in microplastic burden observed within the same species in the wild. The results suggest behavioral differences contribute to differential exposure risk.
The occurrence of microplastics in the gastrointestinal tract of demersal fish species
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Scientists checked the stomachs of six types of bottom-dwelling fish and found tiny plastic bits, mostly fibers from things like synthetic clothing, in about 12% of them. Fish with plastic in their guts were noticeably thinner and less healthy than fish without it, suggesting microplastics may harm fish wellbeing. Since these fish are commonly eaten by people, this raises questions about both fish health and what might end up on our dinner plates.
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