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61,005 resultsShowing papers similar to Sub-chronic exposure of Oreochromis niloticus to environmentally relevant concentrations of smaller microplastics: Accumulation and toxico-physiological responses
ClearAccumulation, tissue distribution, and biochemical effects of polystyrene microplastics in the freshwater fish red tilapia (Oreochromis niloticus)
Researchers exposed freshwater tilapia to polystyrene microplastics at varying concentrations for two weeks and tracked where the particles accumulated in the body. The microplastics concentrated primarily in the gut and gills, but also reached the liver and brain, with accumulation increasing over time and at higher doses. The study found that the particles caused oxidative stress and altered enzyme activity in the fish, indicating that even short-term microplastic exposure can trigger measurable biological harm in freshwater species.
Impact of sub-chronic polystyrene nanoplastics exposure on hematology, histology, and endoplasmic reticulum stress-related protein expression in Nile tilapia (Oreochromis niloticus)
Researchers exposed Nile tilapia to polystyrene nanoplastics for an extended period and found the particles caused blood cell changes, tissue damage in the liver and gills, and activated stress responses in cellular structures called the endoplasmic reticulum. Even the lowest concentration tested, which matches levels found in the environment, triggered harmful effects. Since tilapia is one of the most consumed farmed fish worldwide, these results highlight potential food safety concerns from nanoplastic contamination in aquaculture.
Nano polystyrene microplastics could accumulate in Nile tilapia (Oreochromis niloticus): Negatively impacts on the intestinal and liver health through water exposure
Researchers exposed Nile tilapia fish to polystyrene microplastics of different sizes (ranging from 80 nanometers to 80 micrometers) and found that the smallest particles were most likely to accumulate in the body. The 80-nanometer particles caused the most severe damage to intestinal and liver tissues, disrupting cell growth and triggering inflammation and oxidative stress. The study suggests that nanoscale plastic particles may pose greater health risks to fish than larger microplastics.
Deleterious Effects of Polypropylene Microplastic Ingestion in Nile Tilapia (Oreochromis niloticus)
Researchers fed Nile tilapia daily doses of polypropylene microplastics for 30 days and observed significant health effects including changes in blood cell counts, altered gut bacteria, and tissue damage to the intestines and liver. The higher dose group showed more pronounced effects, including elevated inflammatory markers and signs of oxidative stress. The study provides evidence that chronic ingestion of microplastics commonly found in aquatic environments can cause meaningful harm to a widely consumed fish species.
Toxicological effects of nano- and micro-polystyrene plastics on red tilapia: Are larger plastic particles more harmless?
Researchers exposed red tilapia to three sizes of polystyrene particles (0.3, 5, and 70-90 micrometers) to compare their toxic effects. The study found that the largest particles showed the highest accumulation in tissues, but all sizes induced oxidative stress, disrupted cytochrome P450 enzymes, caused neurotoxicity, and altered metabolic profiles, indicating that even smaller nanoplastics can cause significant harm to fish.
Assessment the effect of exposure to microplastics in Nile Tilapia (Oreochromis niloticus) early juvenile: I. blood biomarkers
Researchers exposed juvenile Nile tilapia to different concentrations of microplastics for 15 days followed by a 15-day recovery period and measured blood biomarkers. They found dose-dependent changes in biochemical and hematological parameters, including elevated liver enzymes, altered blood cell counts, and increased glucose levels. Many of these effects persisted even after the recovery period, suggesting that microplastic exposure can cause lasting physiological stress in young freshwater fish.
Uptake and Accumulation of Polystyrene Microplastics in Zebrafish (Danio rerio) and Toxic Effects in Liver
Researchers exposed zebrafish to polystyrene microplastics of two different sizes and tracked where the particles accumulated in the body. They found that smaller particles (5 micrometers) built up in the gills, liver, and gut, while larger particles (20 micrometers) mainly stayed in the gills and gut. The microplastics caused liver inflammation, oxidative stress, and disrupted fat metabolism, suggesting that ingested microplastics can damage internal organs 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 Biomarker, Histopathological and Genotoxicity‐Based Toxicological Evaluation of Polystyrene and Polyethylene Microplastics in Oreochromis mossambicus
Researchers exposed Mozambique tilapia to polystyrene and polyethylene microplastics and found dose-dependent accumulation in gill, gut, and liver tissues. Polyethylene proved significantly more toxic, causing greater oxidative stress, metabolic disruption, and chromosomal damage as measured by micronucleus assays. The study provides evidence that different polymer types can have markedly different toxicological impacts on freshwater fish.
Assessment of dietary polyvinylchloride, polypropylene and polyethylene terephthalate exposure in Nile tilapia, Oreochromis niloticus: Bioaccumulation, and effects on behaviour, growth, hematology and histology
Nile tilapia fish fed three common types of microplastics (PVC, polypropylene, and PET) showed reduced growth, abnormal behavior, blood cell damage, and tissue damage in their gills, liver, and intestines. The harmful effects increased with higher doses of microplastics and varied by plastic type. Since tilapia is one of the most widely consumed fish globally, these findings raise concerns about the health of fish that may carry microplastic contamination to human diets.
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.
Histological and Histochemical Effects of Microplastics Administration in Oreochromis niloticus Fingerlings
Researchers exposed Nile tilapia to two types of microplastics and examined histological and histochemical changes in gills, liver, and kidneys, finding tissue-level damage that demonstrates the harmful effects of microplastic ingestion on vital fish organs.
Impacts of Nile Tilapia (Oreochromis niloticus) exposed to microplastics in bioflocs system
Researchers assessed the effects of polystyrene microplastics on Nile tilapia raised in a bioflocs aquaculture system over 28 days. While the microplastics did not significantly affect water quality, fish growth, or digestive enzymes, they accumulated most heavily in the liver and increased markers of oxidative stress. The findings suggest that even in biofloc systems rich in beneficial microbes, microplastics can still accumulate in fish organs and cause subtle biological harm.
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.
The Effect of Exposure to Microplastic Polystyrene (PS) in Feed on the Haematology of Tilapia (Oreochromis niloticus)
Researchers fed tilapia fish diets containing polystyrene microplastics to study the effects on blood health indicators. They found that microplastic exposure altered several blood parameters in the fish, indicating physiological stress. The study matters because tilapia is a widely consumed fish species, and the results suggest that microplastic contamination in aquatic environments could affect both fish health and food safety.
Growth performance, hematological and oxidative stress responses in Nile tilapia (Oreochromis niloticus) exposed to polypropylene microplastics
Nile tilapia fish fed polypropylene microplastics for 7 weeks showed significantly reduced growth, blood abnormalities indicating anemia, and oxidative stress damage in both liver and brain tissue. The effects were dose-dependent, with higher microplastic concentrations causing more severe harm. Since tilapia is one of the most widely farmed and consumed fish globally, these findings raise concerns about the health of both farmed fish and the people who eat them.
Biochemical, Genotoxic and Histological Implications of Polypropylene Microplastics on Freshwater Fish Oreochromis mossambicus: An Aquatic Eco-Toxicological Assessment
Researchers fed polypropylene microplastics to freshwater tilapia and found they caused oxidative stress, DNA damage, and liver tissue deterioration, with more severe effects after 14 days compared to acute 96-hour exposure. The microplastics disrupted antioxidant enzyme systems and neurotransmitter activity in the fish. The study demonstrates that prolonged microplastic ingestion poses a significant ecological threat to freshwater fish species.
Microplastics induced histopathological lesions in some tissues of tilapia (Oreochromis niloticus) early juveniles
Researchers exposed young tilapia fish to different concentrations of microplastics for 15 days to study effects on their organs. The study found damage across multiple tissues including the kidney, liver, pancreas, gills, and muscles, with effects ranging from inflammation and cell death to structural deformation. These findings suggest that microplastic exposure can cause widespread organ damage in fish even at relatively low concentrations.
Bioaccumulation and sub-chronic toxicity of microplastic environmentally relevant concentrations in Etroplus suratensis brackish water fish
This study found that polystyrene microplastics accumulated in multiple organs of brackish water fish (pearl spot), with the highest levels in the intestines and the lowest in the brain. The microplastics caused liver damage, weakened antioxidant defenses, increased stress hormones, and disrupted genes involved in growth and detoxification. These results are important because brackish water fish are widely consumed, and the study shows that even environmentally realistic microplastic levels can cause significant biological harm.
Microplastics induce toxic effects in fish: Bioaccumulation, hematological parameters and antioxidant responses
Researchers exposed juvenile fish to polyamide microplastics and found the particles accumulated primarily in the intestine, gills, and liver, causing reduced blood oxygen-carrying capacity, liver stress, and disrupted antioxidant defenses. These findings matter because fish are an important food source for humans, and microplastic accumulation in fish tissues could transfer these contaminants to people through their diet.
Sub-chronic nanoplastic toxicity in Etroplus suratensis (Pisces, Cichilidae): Insights into tissue accumulation, stress and metabolic disruption
Researchers exposed pearl spot fish to polystyrene nanoplastics at different concentrations for 14 days and found that the particles accumulated in multiple organs with concentration-dependent distribution patterns. The nanoplastics caused elevated glucose and cholesterol levels, suppressed antioxidant defenses, and increased markers of oxidative damage and stress. Gene expression changes in stress response and growth-related genes suggest that nanoplastic exposure may impair both immune function and normal development in fish.
Evaluation of Toxicological Risks and Effects of Microplastics on Nile Tilapia (Oreochromisniloticus) under in Vitro Laboratory Conditions
This laboratory study evaluated the toxicological effects of microplastics on Nile tilapia (Oreochromis niloticus) under controlled conditions, finding measurable harm at the concentrations tested. The results have implications for managing fish health in aquaculture operations with microplastic-contaminated water.
The Effect of Exposure to Polystyrene Microplastics in Feed on the Growth of Tilapia (Oreochromis niloticus)
This study exposed tilapia fish to polystyrene microplastics mixed into their feed at different concentrations. The results showed that microplastic exposure negatively affected the growth and development of the fish. This is relevant to human health because tilapia is a widely consumed fish, and microplastics accumulating in farmed fish could be passed along to the people who eat them.
Exploration of polyacrylamide microplastics and evaluation of their toxicity on multiple parameters of Oreochromis niloticus
Researchers evaluated the toxicity of polyacrylamide microplastics on Nile tilapia fish at different concentrations and found significant harmful effects across multiple biological systems. The microplastics disrupted antioxidant enzymes, reduced blood cell counts, and caused histological damage to gills, liver, and intestine. The study indicates that polyacrylamide microplastics, increasingly present in aquatic environments, are toxic agents with broad physiological impacts on freshwater fish.