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Polyester Microfiber Accumulation and Toxicological Effects on Freshwater Fish Labeo rohita.
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Scientists found that tiny plastic fibers from polyester clothing seriously harm freshwater fish when they eat them, causing stress, behavioral changes like increased aggression, and disrupting their body chemistry. This matters because these same plastic fibers are widespread in our water systems and food chain, potentially affecting the fish we eat and the water we drink. The study shows we need to reduce plastic pollution from synthetic clothing to protect both aquatic life and human health.
Synthetic polyester microfibers (PES-MFs) are emerging contaminants that pose a serious risk to aquatic organisms. This study evaluated the toxicological effects of PES-MFs on the freshwater Juvenile fish Labeo rohita, which were exposed for 21 days to environmentally relevant concentrations. Toxicity was assessed through ingestion rates, behavioural response, and biochemical biomarkers, including oxidative stress enzymes (SOD, CAT, LPO, GPx, GSH), and brain Acetylcholinesterase (AchE). Results revealed significant physiological stress, with elevated LPO and enzymatic imbalances in the gills and gastrointestinal tract (p<0.05). Behavioural changes such as reduced feeding, increased aggression, and decreased growth were observed. Microfiber ingestion was dose-dependent. Biochemical analysis showed a significant increase (p<0.001) in protein, carbohydrate, and lipid levels in the tissues of exposed fish. These findings confirm that exposure to PES-MFs causes physiological stress, disrupts metabolic balance, and harms the health and behaviour of L. rohita, highlighting the need to control microfiber pollution in freshwater ecosystems..
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Scientists exposed farmed fish (Rohu, a popular food fish) to microplastic pollution levels found in some contaminated waters and found it damaged their gills and intestines, slowed their growth, caused anemia-like symptoms, and made it harder for them to absorb nutrients from food. While this study was done in fish rather than humans, it matters because it shows microplastics can cause real physical harm to the animals we eat and to aquatic ecosystems overall—raising concerns about both food supply sustainability and the broader impact of plastic pollution making its way up the food chain.
Intestinal Accumulation of Polyester Microfibers Modulates HPG Axis Regulation and Oocyte Maturation in Zebrafish (Danio rerio)
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Scientists found that tiny plastic fibers from clothing (called microfibers) can build up in fish intestines and disrupt their hormone systems, affecting how their eggs develop. While this study was done in zebrafish, it's concerning because humans also consume these plastic fibers through seafood and drinking water. This research suggests that microplastic pollution may be interfering with reproductive health in ways we're just beginning to understand.
Polystyrene microplastics exposure in freshwater fish, Labeo rohita: evaluation of physiology and histopathology
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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.
Chronic Toxicity of Microplastics on Fish (Labeo rohita) and Their Impact on the Freshwater Ecosystem: A Case Study of Gangasagar Pond, Darbhanga, India
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Researchers investigated microplastic contamination in Gangasagar Pond in India, finding fibers as the most common type, primarily from domestic waste and discarded packaging. Fish in the pond showed microplastics lodged in their gill chambers and mouths, and tissue analysis revealed damage to the stomach and intestines. The study suggests that microplastic pollution in freshwater ecosystems can directly harm fish health through ingestion and physical contact.
Microplastic Bioaccumulation and its Systemic Effects in Labeo rohita: From Cellular Damage to Behavioural Disruption
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Rohu carp (Labeo rohita) exposed to polyethylene microplastics at up to 5 mg/L for 60 days accumulated particles in gills, liver, and intestines with dose-dependent cellular damage, behavioral disruption, and partial recovery after 30 days in clean water.
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