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20 resultsShowing papers similar to Contamination of stream fish by plastic waste in the Brazilian Amazon
ClearHabitat Integrity and Microplastic Contamination in Amazonian Streams: Assessment of Water, Sediment, and Fish and Identification of Predominant Polymers
Researchers assessed microplastic contamination in Amazonian streams by sampling water, sediment, and fish, and characterised predominant polymer types, finding that contamination was widespread across all environmental compartments regardless of habitat integrity, suggesting that even well-preserved stream habitats are not protected from microplastic pollution.
First evidence of microplastic ingestion by fishes from the Amazon River estuary
Researchers documented the first evidence of microplastic ingestion by fish in the Amazon River estuary, finding plastic particles — predominantly polyamide and polyethylene pellets — in 30% of 189 specimens across 14 species, with larger fish containing more particles, indicating widespread contamination extending into one of the world's most biodiverse river systems.
Microplastics in fishes in amazon riverine beaches: Influence of feeding mode and distance to urban settlements
Researchers found microplastics in the digestive tracts of 29 fish species from Amazon riverine beaches, with contamination levels influenced by fish feeding mode and distance to urban settlements within a protected area.
Far from urban areas: plastic uptake in fish populations of subtropical headwater streams
This study found plastic fibers in 38% of fish from remote subtropical headwater streams far from urban areas in Brazil, with fibers making up the fourth most common item in fish stomachs. The results suggest that even in sparsely populated landscapes, microplastic contamination of freshwater ecosystems is widespread.
Ingestão e efeitos morfofisiológicos dos microplásticos em espécies de peixes da Amazônia Central
This Brazilian thesis investigates microplastic ingestion and its effects on fish from the Amazon basin, one of the world's most biodiverse freshwater systems. Given that aquatic organisms in even remote areas are exposed to microplastics, the research highlights risks to Amazon fish diversity and the potential for microplastics to disrupt aquatic food webs in previously pristine ecosystems.
Occurrence of microplastics in the gastrointestinal tract of Amazonian fish species with different feeding habits
Microplastics were found in the gastrointestinal tracts of multiple Amazonian fish species with different feeding habits from Lake Janauacá and the Anavilhanas Archipelago, with feeding strategy influencing ingestion rates—underscoring widespread microplastic contamination even in remote Amazon basin aquatic ecosystems.
Avaliando a poluição plástica em ecossistemas brasileiros: um estudo integrado da poluição em organismos e ambientes.
Researchers examined plastic ingestion by freshwater fish across 23 species in the Upper Parana River floodplain in Brazil, finding that nine species ingested plastics and that seasonality significantly influenced ingestion rates, with the highest levels recorded during dry season. The study also synthesized trends and gaps in Brazilian plastic pollution research, linking plastic contamination patterns to fishing activities, domestic waste, and anthropogenic pressures in aquatic ecosystems.
Microplastic occurrence in fish species from the Iquitos region in Peru, western Amazonia
Researchers found microplastics in 15 commercial fish species from markets in the Peruvian Amazon, detecting 2,337 particles across 61 specimens — among the first reports of microplastic contamination in fish from the Amazon basin.
Widespread microplastic ingestion by fish assemblages in tropical estuaries subjected to anthropogenic pressures
A survey of 2,233 fish from 69 species across two tropical Brazilian estuaries found microplastics in 9% of individuals, with ingestion rates linked to feeding guild, habitat use, and proximity to urban areas. The study demonstrates that microplastic ingestion is widespread even in tropical systems and is shaped by ecology rather than occurring at random.
First account of plastic pollution impacting freshwater fishes in the Amazon: Ingestion of plastic debris by piranhas and other serrasalmids with diverse feeding habits
Researchers found the first evidence of plastic ingestion by freshwater Amazonian fish, with about one quarter of 172 serrasalmid specimens (piranhas and relatives) across 16 species having consumed plastic particles of 12 polymer types — and notably, plastic ingestion occurred across all feeding guilds (herbivores, omnivores, carnivores) with no difference in frequency by diet.
Microplastic occurrence in fish species from the Iquitos region in Peru, western Amazonia
Researchers surveyed microplastic contamination in 61 fish from 15 commercial species in the Peruvian Amazon near Iquitos. The study found microplastics in 100% of sampled fish, with an average of 38.3 particles per individual detected across gills and internal organs, demonstrating that microplastic pollution has reached even remote areas of the western Amazon basin.
First record of plastic ingestion by an important commercial native fish (Prochilodus lineatus) in the middle Tietê River basin, Southeast Brazil
Researchers documented the first record of plastic ingestion by Prochilodus lineatus in Brazilian fluvial ecosystems, finding that 71.88% of individuals sampled contained plastics in their digestive tracts, with significantly higher particle loads in fish from the polluted Tietê River versus a cleaner tributary.
Food ecology and presence of microplastic in the stomach content of neotropical fish in an urban river of the upper Paraná River Basin
Microplastics were found in the stomachs of multiple fish species in an urban Brazilian river, with ingestion rates linked to each species' feeding ecology. The findings confirm that microplastics have entered the freshwater food chain, raising concern about contamination reaching people who eat these fish.
Ingestion of plastic debris by commercially important marine fish in southeast-south Brazil
Scientists visually examined 965 specimens of eight commercially exploited fish species off the southeast-south coast of Brazil for plastic debris ingestion, finding plastic in multiple species across different marine habitats.
Plastic contamination in fish digestive tracts in Amazonian rivers during a period of extreme low water
Researchers analyzed microplastics in the gastrointestinal tracts of fish from two Amazonian rivers during an extreme drought period in 2023. Microplastics were detected in multiple species from both Rio Negro and Rio Solimões, with fibers dominating, and higher concentrations found near human settlements, linking contamination to local plastic waste inputs.
Ichthyoplankton and plastic waste drift in a river in the Amazon Basin, Brazil
Researchers documented ichthyoplankton and plastic waste drift in the Tapajós River of the Amazon Basin, finding plastic debris co-occurring with fish eggs and larvae across spatial and temporal gradients, suggesting shared transport pathways.
Occurrence and characterization of microplastic content in the digestive system of riverine fishes
Researchers found microplastics in 93.8% of riverine fish examined, with polystyrene, polyethylene, and nylon being the most common polymer types concentrated near urban and industrial areas, and small particles (0.025-1 mm) predominating across species.
Intake of microplastics by fishes in a floodplain lake of the Curiaú River (Macapá, Amapá, Brazil)
Researchers examined microplastic ingestion in fish from a floodplain lake of the Curiaú River in the Brazilian Amazon, finding microplastics in stomach, intestine, and gill samples with ingestion patterns reflecting both passive and active uptake during normal feeding behavior.
Large-scale monitoring and risk assessment of microplastics in the Amazon River
Researchers conducted the largest microplastic monitoring study in the Amazon River, sampling 40 sites across 1,500 kilometers. Microplastics were found everywhere, with urban streams near cities showing concentrations up to 1,000 times higher than the main river. This study confirms that even remote freshwater ecosystems like the Amazon are contaminated with microplastics, which could affect the fish and water that local communities depend on.
Microplastics in aquatic communities of neotropical agroecosystems
Researchers surveyed streams running through agricultural areas in the Comandaí basin of Brazil to test whether macroinvertebrates and fish contained microplastics, and whether ecological traits or stream position predicted which organisms were most exposed. Both invertebrates and fish across diverse ecological roles were found to contain microplastics, suggesting that plastic pollution is pervasive throughout the food web in these farming-dominated waterways. This research expands our understanding of microplastic ingestion beyond well-studied coastal systems into inland freshwater ecosystems of the Global South.