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61,005 resultsShowing papers similar to Do polystyrene microplastics affect juvenile brown trout (Salmo trutta f. fario) and modulate effects of the pesticide methiocarb?
ClearPolystyrene microplastics do not affect juvenile brow trout (Salmo trutta f. fario) or modulate effect of the pesticide methiocarb
A controlled experiment exposing juvenile brown trout to polystyrene microplastics alone or combined with the pesticide methiocarb found no significant adverse effects on fish health or behavior at the tested concentrations. The results suggest that polystyrene microplastics may not amplify the toxicity of this pesticide in salmonid fish under short-term exposure.
Polystyrene microplastics do not affect juvenile brown trout (Salmo trutta f. fario) or modulate effects of the pesticide methiocarb
Juvenile brown trout exposed to polystyrene microplastics for 96 hours showed no effects on any measured biomarker, but the pesticide methiocarb caused significant acetylcholinesterase inhibition, tissue damage in liver and gills, and impaired enzyme activity. Combining microplastics with methiocarb did not amplify the pesticide's effects, suggesting these pollutants do not interact toxicologically in juvenile trout.
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.
Interacting Effects of Polystyrene Microplastics and the Antidepressant Amitriptyline on Early Life Stages of Brown Trout (Salmo trutta f. fario)
When brown trout eggs and larvae were exposed to polystyrene microplastics alone, there were no significant developmental or biochemical effects, but the antidepressant amitriptyline caused serious developmental harm and behavioral changes. Microplastics did not modify the toxicity of amitriptyline, suggesting the two pollutants do not interact in this species.
Combined polystyrene microplastics and chlorpyrifos decrease levels of nutritional parameters in muscle of rainbow trout (Oncorhynchus mykiss)
Researchers exposed rainbow trout to polystyrene microplastics combined with the pesticide chlorpyrifos and found that the combination significantly reduced key nutritional parameters (protein, lipid, and moisture content) in muscle tissue compared to either contaminant alone.
Effect of polystyrene microplastic and chlorpyrifos pesticide on superoxide dismutase activity in tissues of rainbow trout (Oncorhynchus mykiss)
Rainbow trout were exposed to polystyrene microplastics, the pesticide chlorpyrifos, and a combination of both, with researchers measuring effects on antioxidant enzyme activity. The combined exposure caused greater disruption to superoxide dismutase activity than either pollutant alone, suggesting microplastics can amplify pesticide toxicity in fish.
Acute toxicity of organic pesticides to Daphnia magna is unchanged by co-exposure to polystyrene microplastics
Daphnia magna were exposed to dimethoate (low log Kow) and deltamethrin (high log Kow) pesticides in the presence or absence of 1 μm polystyrene microplastics, and microplastics were found to have no effect on the acute toxicity of either pesticide. The study challenges the assumption that polystyrene MPs function as significant vectors altering pesticide bioavailability and toxicity to freshwater zooplankton.
Effects of the Antidepressant Amitriptyline on Juvenile Brown Trout and Their Modulation by Microplastics
Researchers exposed juvenile brown trout to the antidepressant amitriptyline with and without polystyrene microplastics and found that microplastics modulated the pharmaceutical's effects on fish behavior and physiology, highlighting the complexity of combined pharmaceutical-plastic pollution in aquatic ecosystems.
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.
Toxicity of mixture of polyethylene microplastics and Up Grade® pesticide on Oreochromis niloticus juvenile: I. Hemato-biochemical and histopathological alterations
Researchers exposed juvenile Nile tilapia to a pesticide and polyethylene microplastics, both individually and in combination, and measured blood chemistry changes and organ damage over 15 days. The combination treatment caused more severe effects than either pollutant alone, including reduced red blood cell counts, elevated liver enzymes, and significant tissue damage to the gills and intestines. The study demonstrates that microplastics can worsen the toxic effects of agricultural pesticides on commercially important fish species.
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.
Toxic effects of polystyrene microplastics on atrazine in zebrafish: Exogenous toxicity and endogenous mechanism
Researchers found that combining polystyrene microplastics with the common herbicide atrazine was more toxic to zebrafish than either pollutant alone, causing greater liver and gut damage. The combination also degraded water quality by reducing oxygen levels and increasing harmful nitrogen compounds. This is important because microplastics and pesticides frequently co-exist in the environment, meaning their combined effects on aquatic life and food safety may be worse than studies of individual pollutants suggest.
Combined impacts of organophosphate pesticide and polyamide microplastics on growth, hematology, and immune responses in juvenile striped catfish (Pangasianodon hypophthalmus)
Researchers exposed juvenile striped catfish to both polyamide microplastics and an organophosphate pesticide, finding that the combination caused more severe growth reduction, immune suppression, and organ damage than either pollutant alone — evidence that microplastics and pesticides can act together to amplify harm in freshwater fish.
Polystyrene Microplastics Modulate the Toxicity of the Hydrophilic Insecticide Thiacloprid for Chironomid Larvae and Also Influence Their Burrowing Behavior
Researchers found that polystyrene microplastics altered the toxicity of the hydrophilic insecticide thiamethoxam to aquatic invertebrates, with the combined exposure producing different effects than either stressor alone. The study highlights that microplastics can act as vectors that change the bioavailability and ecotoxicological impact of water-soluble pesticides.
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.
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.
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 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.
Joint effects of micro-sized polystyrene and chlorpyrifos on zebrafish based on multiple endpoints and gut microbial effects
Researchers found that micro-sized polystyrene particles accumulated in zebrafish gut and liver, causing oxidative stress and gut microbiome disruption, and that co-exposure with chlorpyrifos pesticide amplified toxic effects at the individual level.
Polystyrene microplastics modulate the toxic effects of bisphenol A in the early stages of zebrafish development
This study investigated whether polystyrene microplastics affect the toxicity of bisphenol A (BPA) during zebrafish embryo development by co-exposing fish to both contaminants. The PS microplastics modulated BPA toxicity in complex ways—in some developmental endpoints amplifying harm, in others providing partial protection—underscoring the unpredictability of combined plastic-chemical exposures.
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.
Polystyrene nanoplastics enhance the toxicological effects of DDE in zebrafish (Danio rerio) larvae
Researchers found that polystyrene nanoplastics enhanced the toxicity of the pesticide metabolite DDE in zebrafish larvae, with co-exposure causing greater developmental abnormalities and oxidative stress than either pollutant alone.
Polystyrene microplastic particles in combination with pesticides and antiviral drugs: Toxicity and genotoxicity in Ceriodaphnia dubia
Researchers investigated the toxic and genotoxic effects of polystyrene microplastics alone and in combination with the antiviral drug acyclovir and the insecticide imidacloprid on the freshwater crustacean Ceriodaphnia dubia. The study found that microplastics can act as carriers for other pollutants in a 'Trojan horse effect,' and that mixtures of these contaminants produced combined toxicity in this sensitive freshwater organism.
Combined Toxicity of Polystyrene Nanoplastics and Pyriproxyfen to Daphnia magna
Researchers evaluated the combined toxic effects of polystyrene nanoplastics and the insecticide pyriproxyfen on the water flea Daphnia magna under both acute and chronic exposure conditions. They found that nanoplastics initially reduced the acute toxicity of the pesticide within 24 hours but worsened chronic effects over longer periods. The study suggests that nanoplastics can alter how other environmental contaminants affect aquatic organisms, complicating risk assessments.