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20 resultsShowing papers similar to Microplastics in brown trout (Salmo trutta Linnaeus, 1758) from an Irish riverine system
ClearSize-Dependent Tissue Translocation and Physiological Responses to Dietary Polystyrene Microplastics in Salmo trutta
Researchers fed brown trout polystyrene microplastics of different sizes through their diet and tracked particle distribution and physiological effects, including a recovery period after exposure ended. They found that smaller microplastics were more likely to translocate from the gut to other organs, and that size significantly influenced where particles accumulated. The study provides important data on how microplastic size affects tissue distribution and physiological responses in a temperate freshwater fish.
No evidence of spherical microplastics (10–300 μm) translocation in adult rainbow trout (Oncorhynchus mykiss) after a two-week dietary exposure
Rainbow trout were exposed to spherical microplastics ranging from 10 to 300 micrometers to determine whether particles translocate from the gut into body tissues in adult fish. No evidence of microplastic translocation from the gastrointestinal tract to systemic tissues was found, suggesting that fish gut removal before consumption reduces but may not eliminate human dietary microplastic exposure.
Microplastic concentration and composition in surface waters and in stream-rearing Steelhead Trout (Oncorhynchus mykiss) in a rural coastal California stream
A survey of a rural coastal California stream found microplastics in both the water and in 60% of juvenile steelhead trout sampled, with fibers making up the dominant particle type in both cases. Microplastic levels in the water peaked during the low-flow summer months, suggesting that reduced dilution allows particles to accumulate seasonally. The high rate of microplastic ingestion in juvenile steelhead—a threatened species—raises concern about whether plastic ingestion contributes to the population pressures already facing these fish.
Occurrence and characterization of microplastic content in the digestive system of riverine fishes
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.
Oncorhynchus mykiss Microplastic Exposure: Impacts and Research Gaps
This review synthesized global research on the effects of microplastic exposure on rainbow trout, documenting histopathological changes, oxidative stress, immune impacts, and reproductive disruption across various MP types, concentrations, and exposure durations studied in this commercially important fish.
Microplastics in the Surface Water and Gastrointestinal Tract of Salmo trutta from the Mahodand Lake, Kalam Swat in Pakistan
Researchers detected microplastics in both the surface water and gastrointestinal tracts of brown trout (Salmo trutta) from a high-altitude lake in Pakistan, demonstrating that microplastic contamination has reached remote mountain ecosystems far from urban pollution sources.
Microlitter measurement in fish Rutilus rutilus from the Slovenian part of the Mura river basin
Researchers examined the gastrointestinal tracts of 50 common roach caught from the Slovenian portion of the Mura River basin, conducting the first study of microlitter contamination in Slovenian freshwater fish and characterizing the abundance, morphology, and polymer types of ingested particles.
Changes in haematology, metabolic rate, and cellular structure of spleen and head kidney of brown trout, Salmo trutta, after exposure to polystyrene microplastic particles
Researchers fed brown trout polystyrene particles for 30 days and found that particles accumulated in spleen and head kidney tissue (1–51.6 μg/g) with 1 μm particles predominating at 80%, and that exposure altered hematological parameters, metabolic rate, and cellular structure of immune organs.
Assessment of microplastic contamination in rainbow trout (Oncorhynchus mykiss) and surface water of a high-altitude aquaculture system in the Chehel Chai River, Iran
Researchers investigated microplastic contamination in both farmed rainbow trout and the surface water of the Chehel Chai River in Iran, finding microplastics in fish digestive tracts, gills, and skin. A total of 50 fish were analyzed, revealing widespread presence of plastic particles across all tissue types examined. The study raises concerns about microplastic transfer to humans through consumption of farmed fish from contaminated waterways.
Microplastics in juvenile Chinook salmon and their nearshore environments on the east coast of Vancouver Island
Researchers investigated microplastic ingestion in juvenile Chinook salmon and their nearshore marine environments on the east coast of Vancouver Island, finding microplastics present in both fish digestive tracts and surrounding waters and characterizing the types of particles consumed.
Microplastics in freshwater fishes: Occurrence, impacts and future perspectives
This review synthesizes current knowledge about microplastic contamination in freshwater fish, which serve as important indicators of plastic pollution in rivers and lakes. Researchers found that microplastic ingestion patterns in fish are related to body size, feeding habits, and local urbanization levels, with controlled studies showing various effects on fish physiology and behavior. While fish can typically expel most microplastics quickly, certain particle shapes and sizes may remain in the body or cross into other organs through the intestinal wall.
Microplastics in freshwater fish from Central European lowland river (Widawa R., SW Poland)
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.
Microplastic Contamination in Farmed Rainbow Trout (Oncorhynchus mykiss): First Evidence from Bulgarian Freshwater Aquaculture
Researchers present the first assessment of microplastic contamination in farmed rainbow trout muscle tissue from Bulgarian freshwater aquaculture. Using advanced infrared imaging spectroscopy, they detected microplastics in all examined fish, with multiple polymer types suggesting diverse contamination sources. The findings underscore the importance of monitoring microplastic levels in aquaculture species intended for human consumption.
Characterization and enumeration of microplastic pollution in three fish species of the Upper Mississippi River
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.
Mikroplaster i naringskedjor- forekomst hos Vanerns oring (Salmo trutta) och dess huvudsakliga foda
Researchers examined microplastic occurrence in brown trout and their prey European smelt from Lake Vänern, Sweden, investigating whether passive transfer through predation leads to bioaccumulation of microplastics across different organs in freshwater fish.
Occurrence of Microplastics in the Gastrointestinal Tracts of Edible Fishes from South Indian Rivers
Researchers isolated and characterized microplastics from the gastrointestinal tracts of five edible fish species collected from the Kollidam and Vellar rivers in Tamil Nadu, Southern India. They found 315 microplastic particles across 23 fish, dominated by fibers (85.7%) in Kollidam river fish and fragments (14.3%) in Vellar river fish, with particle sizes ranging from 109 to 284 µm, indicating widespread dietary exposure to microplastics in commercially harvested freshwater fish.
Comprehensive systematic review and meta-analysis of microplastic prevalence and abundance in freshwater fish species: the effect of fish species habitat, feeding behavior, and Fulton’s condition factor
A meta-analysis of freshwater fish across 42 studies found an average of 2.35 microplastic items per individual, with 80% of research focused on the gastrointestinal tract and 58% on river environments. Contrary to expectations, microplastic ingestion correlated with fish body physiology (size and weight) rather than feeding behavior or habitat, suggesting physical characteristics determine uptake more than ecological niche.
Microplastic data from surface waters and in stream-rearing steelhead trout (Oncorhynchus mykiss) in a rural coastal California stream
This dataset entry describes microplastic measurements from the water and the gut contents of juvenile steelhead trout in Scott Creek, a rural California coastal stream, providing baseline contamination data for a salmon-bearing watershed with minimal urban influence. Even in relatively pristine, low-traffic streams, microplastics are present and entering fish, suggesting contamination is pervasive in California waterways regardless of urbanization level. The data supports evaluation of ecological risks to native fish species that are already under pressure from other stressors.
Assessment on Microplastics Contamination in Freshwater Fish: a Case Study of the Ubolratana Reservoir, Thailand
Researchers examined microplastic contamination in freshwater fish from the Ubolratana Reservoir, Thailand, finding that 96.4% of 14 examined species had ingested microplastics, and assessed abundance, size, colour, and shape of particles from stomach and intestinal contents across sampling stations.
Thermal processing implications on microplastics in rainbow trout fillet
This study tested whether sous-vide cooking of rainbow trout fillets at different temperatures and durations affects microplastic abundance or migration into the fish. Results showed thermal processing altered the physical state of microplastics present in the fillets and influenced estimates of human microplastic intake from cooked fish.