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Caddisfly Larvae (Trichoptera: Limnephilidae) Facilitate the Uptake of Microplastics by a Freshwater Fish (Ameiurus Nebulosus)
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Caddisfly larvae (Trichoptera: Limnephilidae) facilitate the uptake of microplastics by a freshwater fish (Ameiurus nebulosus)
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Researchers investigated whether caddisfly larvae (Limnephilus, Trichoptera) act as a vector for transmitting microplastics to freshwater fish, conducting experiments where larvae incorporated polyethylene terephthalate (PET) microfragments into their cases and were subsequently fed to brown bullhead catfish. Results confirmed that fish ingested MPs via caddisfly case consumption, demonstrating a novel trophic transfer pathway from macroinvertebrates to fish even when natural case-building materials were available.
Ingestion of Microplastic by Fish of Different Feeding Habits in Urbanized and Non-urbanized Streams in Southern Brazil
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Researchers found that fish in urbanized streams in southern Brazil were significantly more likely to have ingested microplastic fibers than fish in non-urbanized streams, and that omnivorous species faced the highest exposure risk. This highlights how urban development drives microplastic contamination into freshwater food chains long before particles reach the ocean.
Uptake of Microplastics by a Tropical Freshwater Cladocera Revealed by Polyethylene Terephthalate Fluorescence
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Researchers documented that a common tropical freshwater zooplankton species readily ingests PET microplastics of similar size to its food, with particles accumulating in its gut and sometimes causing death — raising concern about microplastic disruption of tropical aquatic food webs.
Microplastic Ingestion by Fish in a Neotropical Reservoir: Effects of Reservoir Dynamics and Fish Traits
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Researchers examined microplastic ingestion by fish communities across different zones of a Neotropical reservoir in Brazil, finding that fish in calmer, lake-like zones and bottom-dwelling insect-eating species were most likely to ingest plastic particles. The study suggests that both reservoir design and fish ecology shape how microplastics move through freshwater food webs.
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