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61,005 resultsShowing papers similar to Oncorhynchus mykiss Microplastic Exposure: Impacts and Research Gaps
ClearNo 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.
Polystyrene Nanoplastics Induce Multi-Organ Toxicity in the Rainbow Trout (Oncorhynchus mykiss): An Integrated Assessment of Physiological, Immunological, and Molecular Responses
Rainbow trout were exposed to polystyrene nanoplastics at three concentrations for 28 days and assessed for physiological, immunological, and molecular responses across multiple organs. NPs accumulated in liver, spleen, and intestine, causing dose-dependent oxidative stress, immune dysregulation, and altered gene expression, demonstrating multi-organ toxicity in a commercially important fish species.
The Influence of Polystyrene Microplastics on Juvenile Steelhead Trout (Oncorhynchus mykiss)
This study investigated the effects of polystyrene microplastics on juvenile steelhead trout, a commercially and ecologically important anadromous fish. As top predators, steelhead are at particular risk from microplastic bioaccumulation through their prey, and the review highlights gaps in research compared to smaller model species. Understanding how microplastics affect large predatory fish is critical because these species are widely consumed by humans and play key roles in connecting freshwater and marine ecosystems.
Microplastics in brown trout (Salmo trutta Linnaeus, 1758) from an Irish riverine system
Microplastic prevalence and characteristics were assessed in brown trout (Salmo trutta) from an Irish riverine system to investigate plastic ingestion in a freshwater salmonid. The study found microplastics in a proportion of sampled fish, adding to the limited literature on microplastic ingestion in freshwater salmonids and highlighting rivers as an exposure pathway for these commercially important fish.
Toxicity of polystyrene microplastics on juvenile Oncorhynchus mykiss (rainbow trout) after individual and combined exposure with chlorpyrifos
Researchers tested the effects of pristine and chlorpyrifos-loaded polystyrene microplastics on juvenile rainbow trout, examining tissue damage and physiological responses. They found that microplastics carrying the pesticide caused more severe histopathological changes in the gills and liver than either contaminant alone. The study provides evidence that microplastics can act as vectors for pesticides, amplifying their toxic effects on freshwater fish.
Effects of different types of primary microplastics on early life stages of rainbow trout (Oncorhynchus mykiss)
Researchers examined the effects of polystyrene, PET, and polyethylene microplastics on rainbow trout early life stages over 69 days, finding elevated stress hormones and DNA damage despite no significant changes in hatching success or larval survival.
Effect of microplastics on Yersinia ruckeri infection in rainbow trout (Oncorhynchus mykiss)
Researchers found that microplastic exposure predisposed rainbow trout to more severe Yersinia ruckeri infections, with co-exposed fish showing worse blood biochemical parameters and hepatic oxidative stress compared to fish exposed to the pathogen alone.
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.
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.
Ecotoxicological impacts of Microplastic (MP) Pollution in Fish
This review synthesizes evidence on microplastic bioaccumulation and ecotoxicological impacts in fish, examining tissue distribution patterns, immune disruption, reproductive harm, and behavioral effects. The authors conclude that microplastics cause multi-system health effects in fish with implications for aquatic ecosystem stability and food safety.
Effects of microplastics in freshwater fishes health and the implications for human health
This review examines how microplastics affect the health of freshwater fish, which are a major protein source for billions of people. Fish ingest microplastics that accumulate in their guts, gills, and tissues, leading to inflammation, oxidative stress, and disrupted growth. Since microplastics in fish tissue can transfer to humans through the food chain, this is relevant to both ecosystem and human health.
Polystyrene microparticles can affect the health status of freshwater fish – Threat of oral microplastics intake
Researchers fed juvenile rainbow trout polystyrene microplastics at three dietary concentrations for six weeks and assessed multiple health parameters. They found that the highest concentration triggered immune responses, liver and gill damage, disrupted antioxidant balance, and reduced plasma proteins. The study demonstrates that oral microplastic intake can negatively affect the health of freshwater fish across multiple organ systems.
Effects of a microplastic exposure gradient on juvenile lake trout (Salvelinus namaycush)
Researchers exposed newly hatched lake trout to a gradient of three microplastic types over 12 weeks, assessing growth, survival, and physiological biomarkers. Microplastic exposure caused dose-dependent effects on early life stage fish, with polymer type influencing the pattern of harm.
Size Matters: Ingestion of Relatively Large Microplastics Contaminated with Environmental Pollutants Posed Little Risk for Fish Health and Fillet Quality
Rainbow trout were fed polystyrene microplastics (100–400 μm) contaminated with sewage or harbor effluent for 4 weeks, with liver biomarkers showing no significant oxidative stress and the fillet showing no change in oxidative stability during ice storage. The study concludes that ingestion of environmentally-sized contaminated microplastics poses little risk to fish health or meat quality under realistic exposure conditions.
Assessing the Effects of Microplastics on Freshwater Fish
This review examines the growing body of research on how microplastics affect freshwater fish, documenting evidence of ingestion, tissue damage, immune system impairment, and gastrointestinal obstruction across multiple species. Researchers highlight that microplastics from personal care products and degraded plastic goods are accumulating in freshwater ecosystems at concerning rates. The study warns that combined with existing threats like overfishing and habitat loss, microplastic pollution could accelerate population declines in vulnerable fish species.
Microplastics bioaccumulation in fish: Its potential toxic effects on hematology, immune response, neurotoxicity, oxidative stress, growth, and reproductive dysfunction
This review finds that microplastics accumulate primarily in the guts and gills of fish before spreading to other tissues through the bloodstream, causing a cascade of harmful effects including blood changes, immune suppression, nerve damage, and reproductive problems. The severity of harm depends on the size and dose of particles and how long the fish are exposed, with implications for the safety of fish consumed by humans.
Toxicity Effects of Microplastics Individually and in Combination the Fish Pathogen Yersinia Ruckeri on the Rainbow Trout (Oncorhynchus Mykiss)
Researchers found that co-exposure of rainbow trout to polystyrene microplastics and the fish pathogen Yersinia ruckeri exacerbated blood biochemical disruptions and hepatic oxidative stress compared to either stressor alone. The results suggest microplastics may act as a predisposing factor that amplifies bacterial infection severity in fish.
Genome-wide identification of socs gene in rainbow trout (Oncorhynchus mykiss) and response to microplastic exposure
Researchers identified 27 members of the SOCS gene family in rainbow trout and studied how their expression changed after microplastic exposure. They found that several of these immune-regulating genes were significantly up- or down-regulated in the liver, intestine, and brain following exposure. The study provides new insights into the molecular mechanisms by which microplastics may disrupt immune signaling in freshwater fish.
Effects of a microplastic exposure gradient on juvenile lake trout (Salvelinus namaycush)
Researchers exposed newly hatched lake trout for 12 weeks to three types of microplastics, polyethylene, polystyrene, and polyethylene terephthalate, at a gradient of concentrations to assess effects on early life stages of this important sportfish. Microplastic exposure caused growth and developmental effects in juvenile lake trout, with responses varying by polymer type and concentration.
Effects Of Microplastics On Fish Physiology
This review examines how microplastic exposure affects fish physiology, covering accumulation patterns in different tissues, effects on organ function including liver and gill damage, antioxidant responses, and potential reproductive health consequences from both solo and combined contaminant exposures.
Microplastics in marine fish: a mini-review on presence, classification, and impacts
This review summarizes research on microplastics found in marine fish worldwide, noting that fibers and fragments in colors like blue, black, and transparent are the most commonly reported types. Laboratory studies have demonstrated that microplastics can cause physical damage, immune suppression, and oxidative stress in fish. The authors emphasize that more research simulating real ocean conditions is needed to understand the true impact of microplastics on wild fish populations.
Meta-analysis of the effects of microplastic on fish: Insights into growth, survival, reproduction, oxidative stress, and gut microbiota diversity
A meta-analysis of 3,757 biological endpoints from 85 studies found that microplastic exposure significantly inhibits fish growth, survival, and reproduction while increasing oxidative damage, but does not significantly alter gut microbiota diversity. The severity of toxic effects depends on microplastic type, size, concentration, exposure pathway, and the fish's life stage.
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.
Toxic effects on bioaccumulation, hematological parameters, oxidative stress, immune responses and neurotoxicity in fish exposed to microplastics: A review
This review summarizes how microplastics affect fish health, covering toxic effects on blood, immune system, nervous system, and the buildup of plastics in fish tissues. Microplastics that accumulate in fish can trigger oxidative damage, weaken immune responses, and impair brain-related enzyme activity. Since fish are a major protein source for humans, understanding how microplastics harm fish health is directly relevant to the safety of our food supply.