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61,005 resultsShowing papers similar to Assessment of microplastic contamination in rainbow trout (Oncorhynchus mykiss) and surface water of a high-altitude aquaculture system in the Chehel Chai River, Iran
ClearOccurrence and exposure analysis of microplastic in the gut and muscle tissue of riverine fish in Kermanshah province of Iran
Researchers analyzed microplastic contamination in the gut and muscle tissue of fish from the Qarasu River in Iran, finding microplastics in all species examined. The estimated human dietary intake through fish consumption was calculated at approximately 174 and 127 particles per kilogram of body weight per year for adults and children respectively, highlighting the potential for microplastic exposure through food.
Microplastics in the Surface Water and Gastrointestinal Tract of Salmo trutta from the Mahodand Lake, Kalam Swat in Pakistan
Researchers detected microplastics in both the surface water and gastrointestinal tracts of brown trout (Salmo trutta) from a high-altitude lake in Pakistan, demonstrating that microplastic contamination has reached remote mountain ecosystems far from urban pollution sources.
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.
Microplastics and heavy metals in freshwater fish: A comprehensive study of contamination and health risks
Researchers simultaneously assessed microplastic and heavy metal contamination in two fish species from Iran's Kashkan River, finding microplastics in 79% of the 48 specimens examined. The study also found heavy metal levels that exceeded safe limits, raising human health concerns for communities consuming these fish.
Tissue-specific accumulation and species-level variability of microplastics in four freshwater fish from the Dez River, Iran
Researchers measured microplastic contamination in four commercially important fish species from the Dez River, Iran, finding tissue-specific accumulation patterns that varied by species, with gills accumulating more particles than intestines or muscle across all four species.
Evidence of microplastic contamination in the food chain: an assessment of their presence in the gastrointestinal tract of native fish
Researchers found microplastics, mainly polyethylene and polypropylene, in the guts of fish from the Swat and Kabul rivers in Pakistan. These rivers are primary freshwater sources for the region, and the contaminated fish are regularly consumed by local communities. The findings confirm that freshwater fish from polluted rivers are a pathway for microplastic exposure in people's diets.
Microplastic Pollution at Different Trophic Levels of Freshwater Fish in a Variety of Türkiye`s Lakes and Dams
This study surveyed microplastic contamination in seven freshwater fish species from lakes and reservoirs across Türkiye, finding microplastic particles in the gastrointestinal tracts of all 406 fish examined. All ingested microplastics were fibres, predominantly blue in colour, suggesting textile sources. The broad geographic scope and 100% prevalence across species and water bodies indicate that microplastic contamination of freshwater fish is widespread throughout Türkiye, with implications for human exposure through fish consumption.
Microplastics in aquatic species of Anzali wetland: An important freshwater biodiversity hotspot in Iran
Researchers surveyed microplastic contamination in seven aquatic species from Anzali Wetland in Iran, a globally recognized biodiversity hotspot. They found microplastics in the digestive tracts, gills, and skin of all species examined, with herbivorous bottom-dwelling fish showing the highest contamination levels. The findings raise concerns about the widespread penetration of microplastics into freshwater food webs at ecologically sensitive sites.
Microplastics in freshwater wild and farmed fish species of Bangladesh
Researchers evaluated microplastic contamination in freshwater wild and farmed fish species across multiple rivers and farms in Bangladesh, comparing contamination levels between wild-caught and aquaculture-raised fish of the same species.
Microplastic ingestion evidence by economically important farmed fish species from Turkey
Researchers examined microplastic ingestion in farmed rainbow trout, gilthead seabream, and European seabass from Turkey, finding microplastics in 50-63% of fish gastrointestinal tracts, predominantly fibers and fragments from polyethylene and polypropylene.
Distribution characteristics of microplastics in fish of the Tibetan plateau and its physiological effects on Schizothorax davidi
Researchers surveyed microplastic contamination in fish from the Tibetan Plateau and found widespread ingestion, with farmed fish showing higher contamination rates than wild populations. In laboratory exposure experiments, polystyrene microplastics accumulated in fish tissues and caused oxidative stress, reduced swimming ability, and disrupted gut microbial communities. The findings suggest that microplastic pollution poses a significant threat to native cold-water fish species in this ecologically sensitive region.
The Migration and Pollution Risk of Microplastics in Water, Soil, Sediments, and Aquatic Organisms in the Caohai Watershed, Southwest China
Researchers investigated the full pathway of microplastic pollution through a plateau lake ecosystem in southwest China — from soil and water through sediments and into grass carp fish tissue. Microplastic concentrations varied widely across compartments, and fish tissues contained measurable amounts, confirming that these particles move through the food chain in high-altitude freshwater systems. The study is notable because plateau lakes receive less human activity but can still accumulate significant microplastic contamination.
Abundance, characteristics, and risk assessment of microplastics in indigenous freshwater fishes of India
Researchers examined microplastic contamination in five widely consumed freshwater fish species from India and found plastic particles in all specimens, with fibers being the most dominant type. Evidence of microplastics in edible fish tissue indicates translocation from the gut, suggesting a pathway for human exposure through consumption. Risk assessment showed that while microplastic abundance posed a low quantitative risk, the polymer types identified indicated a high hazard potential for the fish species studied.
Microplastic in fishes: the first report from a Himalayan River — Alaknanda
Researchers found microplastics in the gut contents of all five fish species sampled from the Alaknanda River — a headwater of the Ganges — making this the first microplastic study in a Himalayan river. Fibers (66%) dominated, chemically identified as polyester, HDPE, and polypropylene, and the herbi-omnivore species Tor chelenoid had the highest ingestion rates. This finding extends the known geographic reach of freshwater microplastic contamination into remote high-altitude river systems.
Eco Toxicological Assessment of Micro Plastic Ingestion in Freshwater Fishes: A Case Study on Bioaccumulation and Histopathological Alterations
Researchers assessed microplastic accumulation in three freshwater fish species (tilapia, rohu, catla) from a major river system, finding microplastics in gastrointestinal tracts and associated histopathological damage in gills, liver, and kidneys.
Characterization and implication of microplastics on riverine population of the River Ravi, Lahore, Pakistan
Researchers found microplastics in three commercially important freshwater fish species from the River Ravi in Pakistan, with Raman spectroscopy confirming multiple polymer types, indicating widespread contamination of riverine fish populations and potential implications for human dietary exposure in the region.
Microplastic pollution and heavy metal risk assessment in Perca fluviatilis from Anzali wetland: Implications for environmental health and human consumption
Researchers analyzed heavy metals and microplastics in the tissues of European perch from Anzali Wetland in Iran and found contamination in muscle, liver, and gill samples. Microplastics were present in all fish examined, with fibers being the most common type. The study raises concerns about potential health risks for people who regularly consume fish from this polluted wetland.
Baseline biomonitoring of microplastic pollution in freshwater fish from the Chishui River, China: Insights into accumulation patterns and influencing factors
This first-ever biomonitoring study of the Chishui River in China found microplastics in all 31 fish species examined, with an average of about 240 particles per gram in both gills and intestines. Bottom-dwelling fish accumulated significantly more microplastics than those swimming near the surface, and the fish contained twice as many plastic polymer types as were found in the surrounding water and sediment. The widespread contamination of freshwater fish with microplastics raises concerns about human exposure through fish consumption.
Microplastics abundance in abiotic and biotic components along aquatic food chain in two freshwater ecosystems of Pakistan
Researchers quantified microplastic abundance across multiple trophic levels in two Pakistani freshwater ecosystems, finding evidence of bioaccumulation along the food chain from water and sediment through invertebrates to fish species.
Microplastics in Different Tissues of Five Common Fishes from Yuehai Lake: Accumulation, Characterization, and Contamination Assessment
Researchers examined microplastic contamination in the gills and digestive tracts of five fish species from a Chinese lake, finding that fish eating a wider variety of foods accumulated more particles. Different plastic polymer types dominated in different tissues, confirming that microplastics move through freshwater food webs and reach fish that humans consume.
Occurrence and characteristics of microplastics in fish of the Han River, South Korea: Factors affecting microplastic abundance in fish
Microplastics were detected in 106 fish from 22 species at three sites in South Korea's Han River, with an average of 16-20 particles per individual and downstream sites showing the highest contamination, reflecting greater human activity and urban inputs near the river mouth.
Assessment on Microplastics Contamination in Freshwater Fish: a Case Study of the Ubolratana Reservoir, Thailand
Researchers examined microplastic contamination in freshwater fish from the Ubolratana Reservoir, Thailand, finding that 96.4% of 14 examined species had ingested microplastics, and assessed abundance, size, colour, and shape of particles from stomach and intestinal contents across sampling stations.
No 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.
Occurrence of microplastics in the Han River and riverine fish in South Korea
Researchers surveyed microplastic pollution in the Han River and its tributaries in South Korea, as well as in six species of freshwater fish. They found microplastics at all sampling sites, with polyethylene, silicone, and polystyrene being the most common polymer types. Fish intestines contained an average of 22 microplastic particles per individual, predominantly fragments, indicating widespread contamination of the freshwater food web.