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61,005 resultsShowing papers similar to The effects of microplastics on autografts and allografts in Poecilia reticulata
ClearExposure to microplastics impairs digestive performance, stimulates immune response and induces microbiota dysbiosis in the gut of juvenile guppy (Poecilia reticulata)
Researchers exposed juvenile guppies to polystyrene microplastics at two concentrations for 28 days and examined impacts on their digestive systems. The study found that microplastic exposure impaired digestive enzyme activity, stimulated intestinal immune responses, and disrupted the gut microbiota community, suggesting that microplastics can compromise intestinal health in freshwater fish.
Inhibitory effects of polystyrene microplastics on caudal fin regeneration in zebrafish larvae
Exposure to polystyrene microplastics significantly impaired fin regeneration in injured zebrafish larvae, disrupting the signaling pathways and immune responses needed for tissue repair. The study is the first to show microplastics can reduce the regenerative capacity of fish, with potential long-term consequences for their survival in the wild.
Microplastic exposure and consumption increases susceptibility to gyrodactylosis and host mortality for a freshwater fish
Researchers found that guppies exposed to polypropylene microplastics at environmentally relevant concentrations showed significantly higher parasite burdens and increased mortality from gyrodactylid infections, demonstrating that microplastics can compromise disease resistance in fish.
Assessment of the Risk of Microplastics on Gill and Gut Health and Subsequent Pathogen Susceptibility in the Goldfish Model
Researchers assessed how polystyrene microplastics of two sizes affect gill and gut health in goldfish and their subsequent vulnerability to bacterial infection. They found that microplastic exposure caused tissue inflammation, increased immune gene expression, and thickened gill and intestinal structures. Notably, exposure to smaller 0.5-micrometer microplastics significantly reduced fish survival when challenged with a bacterial pathogen, indicating that microplastics can compromise immune defenses in fish.
Physiological Reactions of Poecilia Reticulyata to the Presence of Microplastics in the Aquatic Environment
A study found that guppies exposed to low concentrations of microplastics showed physiological stress responses, including changes in blood cell counts and gill condition, suggesting even small doses can harm freshwater fish.
Effect of polystyrene microplastics on the antioxidant system and immune response in GIFT (Oreochromis niloticus)
Farmed tilapia exposed to polystyrene microplastics of different sizes showed elevated oxidative stress and immune inflammation markers, particularly in the brain, compared to unexposed fish. The findings suggest chronic microplastic exposure can impair immune defenses in commercially important freshwater fish, raising concerns for both aquaculture and wild fisheries.
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.
Size-dependent effects of microplastic on uptake, immune system, related gene expression and histopathology of goldfish (Carassius auratus)
Researchers exposed goldfish to two sizes of polystyrene microplastics at environmentally relevant concentrations for 28 days. The study found that microplastics accumulated in gill, liver, and intestine tissues, causing damage that worsened with smaller particle size and higher doses. The results indicate that microplastics trigger oxidative stress and immune responses in fish, with smaller particles posing greater health risks.
Effect of Polystyrene Microplastics on the Antioxidant System and Immune Response in GIFT (Oreochromis niloticus)
Researchers exposed farmed tilapia to polystyrene microplastics of various sizes and found that smaller particles caused more oxidative stress and stronger immune responses. Fish exposed to nanometer-sized plastics showed higher levels of reactive oxygen species and inflammatory markers compared to those exposed to larger particles. The study suggests that the size of microplastics matters significantly when evaluating their impact on fish health.
Microplastics: A tissue-specific threat to microbial community and biomarkers of discus fish (Symphysodon aequifasciatus)
Researchers found that polystyrene microplastics cause tissue-specific effects in discus fish, inhibiting growth, altering microbial communities in skin, gills, and intestine, and disrupting biomarker responses in a concentration-dependent manner after 28 days of exposure.
Adverse effects of polystyrene microplastics in the freshwater commercial fish, grass carp (Ctenopharyngodon idella): Emphasis on physiological response and intestinal microbiome
Researchers exposed grass carp to different sizes and concentrations of polystyrene microplastics for up to 14 days, followed by a depuration period, and assessed physiological and intestinal microbiome effects. The study found that microplastics caused histological damage, oxidative stress, and shifts in gut microbial communities, with smaller particles and higher concentrations producing more severe effects.
Polystyrene nano/microplastics induce microbiota dysbiosis, oxidative damage, and innate immune disruption in zebrafish
Researchers exposed zebrafish to polystyrene particles of two different sizes and found that both nano- and micro-sized plastics disrupted gut bacteria, caused oxidative damage, and altered immune responses. The severity of effects depended on particle size and concentration, with smaller particles and higher doses causing more harm. The study suggests that plastic particles in waterways may pose a broader threat to fish health than previously understood, affecting digestion, stress defenses, and immunity simultaneously.
Impact of polystyrene microplastic exposure on gilthead seabream (Sparus aurata Linnaeus, 1758): Differential inflammatory and immune response between anterior and posterior intestine
Researchers fed gilthead seabream polystyrene microplastics for 21 days and found they triggered inflammation and immune disruption in both sections of the intestine, with the rear portion more severely affected. The microplastics activated inflammatory signaling pathways and weakened the gut barrier by reducing tight junction proteins. The findings suggest microplastic ingestion could compromise gut health and immune function in fish.
Polystyrene microplastics exposure in freshwater fish, Labeo rohita: evaluation of physiology and histopathology
Researchers fed freshwater fish varying levels of polystyrene microplastics for 90 days and found dose-dependent damage to blood health, growth, and organ tissues. Higher microplastic concentrations caused more severe harm to the liver, kidneys, gills, and intestines. The study highlights that microplastics in freshwater systems can accumulate in fish and cause significant health problems, raising concerns about food safety for communities that rely on freshwater fish.
Integrated response of growth, antioxidant defense and isotopic composition to microplastics in juvenile guppy (Poecilia reticulata)
Guppy fish exposed to polystyrene microplastics at two concentrations for 28 days showed higher accumulation in gills than other tissues, reduced growth at high concentration, elevated oxidative stress, and shifts in stable isotope ratios indicating altered nutrient assimilation.
Polycarbonate and polystyrene nanoplastic particles act as stressors to the innate immune system of fathead minnow (Pimephales promelas)
Researchers studied the effects of polycarbonate and polystyrene nanoplastic particles on the innate immune system of fathead minnows. The study found that these nanoplastics acted as stressors to the fish immune system, suggesting that small-scale plastic particles can interfere with immune function in freshwater organisms.
Polystyrene nanoplastics alter virus replication in orange-spotted grouper (Epinephelus coioides) spleen and brain tissues and spleen cells
Researchers exposed orange-spotted grouper tissue cultures to polystyrene nanoplastics and then challenged them with fish viruses, finding that nanoplastic exposure enhanced viral replication in spleen and brain tissues, suggesting that nanoplastics may impair antiviral immunity in marine fish.
Immunotoxicity of microplastics in fish
This review examines how microplastics damage the immune systems of fish, from harming their gills and organs to disrupting immune cell signaling and gene expression. Over time, microplastic exposure weakens fish immunity by killing immune cells and reducing their ability to fight off infections, with implications for the broader food chain that connects aquatic life to human diets.
Ecotoxicological effects of low-density polyethylene microplastic on Heteropneustes fossilis: behavioral, hematological, biochemical, and histopathological impacts
Scientists exposed freshwater fish to tiny plastic particles (microplastics) from everyday items like plastic bags and found they caused serious health problems including blood disorders, organ damage, and weakened immune systems. The higher the amount of plastic particles, the worse the damage became to vital organs like gills, intestines, and liver. This matters because these same microplastics are found throughout our food chain and water supply, raising concerns about potential health risks for humans who consume contaminated fish and water.
The Effects of Different Concentrations of Microplastics on the Physiology and Behavior of Sebastes schlegelii
Researchers exposed juvenile black rockfish (Sebastes schlegelii) to polystyrene microplastics for 24 days, finding that concentrations of 0.1 mg/L and above caused significant antioxidant enzyme disruption, immune suppression with rising inflammatory cytokines, and reduced survival at 1 mg/L.
Species-Specific Effects of Microplastics On Juvenile Fishes
This study found that polystyrene microplastics cause intestinal inflammation and tissue damage in three fish species with different feeding habits, with effects varying by fish diet type, plastic size, and exposure duration. The findings show that microplastic-induced gut harm in fish is species-specific, complicating risk assessments for wild fish populations.
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.
Diet composition and plastic ingestion in Poecilia reticulata from urban streams
Guppies living in urban streams in Brazil were found to contain microplastics alongside their normal diet of organic matter and insects, with plastic particles ranging from tiny fragments under half a millimeter to pieces over a centimeter long. The presence of plastics across a fish species that sits low on the food chain suggests potential for microplastic transfer up to larger predators and, ultimately, to humans.
Rainbow Trout Maintain Intestinal Transport and Barrier Functions Following Exposure to Polystyrene Microplastics
Rainbow trout were fed diets containing polystyrene microplastics (100–400 μm, including virgin and environmentally-conditioned particles) for 4 weeks, with histological and functional assays finding no significant disruption of intestinal transport, barrier integrity, or immune function. The study suggests that relatively large microplastics do not impair key gut functions in fish even after chronic dietary exposure.