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61,005 resultsShowing papers similar to Natural history matters: Plastics in estuarine fish and sediments at the mouth of an urban watershed
ClearOccurrence of microplastics in commercial fish from a natural estuarine environment
Researchers examined the gastrointestinal tracts of commercial fish caught from a natural estuarine environment and found microplastics in a significant proportion of individuals, documenting both occurrence rates and particle characteristics.
Microplastic and tire wear particle occurrence in fishes from an urban estuary: Influence of feeding characteristics on exposure risk
Researchers surveyed microplastics in the digestive tracts of five fish species from an urban estuary and found plastic particles in 99% of specimens, averaging 27 particles per fish. Atlantic Menhaden had the highest contamination relative to body weight, likely due to their habit of ingesting marine snow aggregates. The study also found suspected tire wear particles in 14% of individual fish, providing the first evidence of tire particle consumption in field-collected organisms.
Low level of microplastic contamination in wild fish from an urban estuary
Researchers found low levels of microplastic contamination in 26 wild fish species from the Pearl River Estuary, South China, with abundance and polymer composition varying by species feeding strategy and habitat depth, suggesting that estuarine fish exposure depends substantially on ecological niche.
Seasonal evidences of microplastics in environmental matrices of a tourist dominated urban estuary in Gulf of Mexico, Mexico
Spatial and seasonal variations in microplastic abundance were examined across water, sediments, and commercial fish in a tourist-impacted estuary in the Gulf of Mexico, finding peak contamination during dry season and at sites closest to urban and fishing activities.
Incidence of Watershed Land Use on the Consumption of Meso and Microplastics by Fish Communities in Uruguayan Lowland Streams
Researchers found that fish in urbanized Uruguayan lowland streams ingested significantly more meso- and microplastics than fish in streams draining extensive ranching land, with 309 individuals from 29 species analyzed. The results link watershed land use intensity to plastic contamination levels in freshwater fish communities.
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.
Assessing meso-, micro-, and nanoplastic pollution in Los Angeles County estuaries
Researchers assessed meso-, micro-, and nanoplastic pollution levels in Los Angeles County estuaries, quantifying plastic loads by size class and polymer type and identifying urban stormwater as the dominant input pathway.
Ecology of microplastics contamination within food webs of estuarine and coastal ecosystems
This paper describes a methodology for studying how microplastics are distributed seasonally and spatially through an estuary food web, from zooplankton to demersal fish. Understanding the ecology of microplastic transfer in estuaries is essential for assessing human dietary exposure through seafood from these highly productive environments.
First insight into plastics ingestion by fish in the Gulf of California, Mexico
Researchers found that 50% of 1,095 fish examined from 13 species in a tropical estuarine system in the Gulf of California had ingested plastic particles, with all recovered particles being threads and most being small microplastic fibres.
A Microplastic Pollution Hotspot: Elevated Levels in Sediments from the San Francisco Bay Area
Sediment samples from San Francisco Bay revealed elevated microplastic concentrations across sites, with polymer types and morphologies consistent with local urban runoff and atmospheric deposition sources.
Do feeding habits influence anthropogenic particle consumption in demersal fish in a tropical estuary? A study from the northern part of the Tropical Eastern Pacific
This study examined how feeding habits and trophic level influence microplastic ingestion in demersal fish from a tropical Mexican estuary, finding that feeding guild and trophic position both affected the type and quantity of anthropogenic particles consumed.
Holistic Assessment of Microplastics and Other Anthropogenic Microdebris in an Urban Bay Sheds Light on Their Sources and Fate
This comprehensive urban bay monitoring study characterized microplastics and other anthropogenic microdebris across water, sediment, and biota, using physical and chemical properties to identify multiple pollution sources and predict environmental fate.
The fate of plastic litter within estuarine compartments: An overview of current knowledge for the transboundary issue to guide future assessments
Researchers reviewed global knowledge on plastic fate within estuaries and found plastic concentrations reaching thousands of items per cubic meter in water and sediment, while identifying major methodological gaps — particularly that microfibers are consistently undersampled and that studies rarely account for ecological trophic gradients or the physicochemical dynamics driving plastic distribution and bioavailability.
Distinct microplastic patterns in the sediment and biota of an urban stream
Researchers found distinct microplastic contamination patterns between sediments and aquatic biota in an urban stream, with sediments accumulating more particles while biota showed selective uptake based on particle size and shape, highlighting the complex dynamics of microplastic distribution in urban freshwater systems.
Assessing Microplastic Contamination in Zooplanktonic Organisms from Two River Estuaries
Researchers assessed microplastic contamination in zooplankton sampled from two river estuaries, finding microplastics in a significant proportion of individual organisms from both sites. Fibre shapes dominated ingested plastics, and contamination levels were higher in the more urbanized estuary, indicating that land-based pollution inputs drive microplastic exposure in estuarine zooplankton.
Microplastics in fishes from an estuary (Minho River) ending into the NE Atlantic Ocean
Wild fish from the Minho River estuary on the NE Atlantic coast were examined for plastic contamination, with 883 plastic particles recovered from 128 fish — 84% were fibers and 97% were microplastics, with the highest contamination found in carp and flounder.
Microplastic concentration and composition in surface waters and in stream-rearing Steelhead Trout (Oncorhynchus mykiss) in a rural coastal California stream
A survey of a rural coastal California stream found microplastics in both the water and in 60% of juvenile steelhead trout sampled, with fibers making up the dominant particle type in both cases. Microplastic levels in the water peaked during the low-flow summer months, suggesting that reduced dilution allows particles to accumulate seasonally. The high rate of microplastic ingestion in juvenile steelhead—a threatened species—raises concern about whether plastic ingestion contributes to the population pressures already facing these fish.
Use of estuarine resources by top predator fishes. How do ecological patterns affect rates of contamination by microplastics?
Researchers found that over 50% of snooks (Centropomus undecimalis and C. mexicanus) across all life stages in a tropical estuary had ingested microplastics, with contamination rates linked to seasonal shifts in habitat use and feeding ecology between estuarine and marine environments.
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.
Identification of the composition and abundance of microplastics in the digestive tract of fish in the Banjaran River, Banyumas District
Researchers identified and quantified microplastic composition and abundance in digestive tract contents of wild-caught fish from a coastal fishery, documenting ingestion rates, polymer types, and particle morphologies across multiple commercially important species.
Diet characteristics of tidal creek-associated fishes of the northeastern Arabian Sea with special reference to microplastic ingestion
Researchers characterized the diet of fishes associated with tidal creeks in the northeastern Arabian Sea, finding evidence of microplastic ingestion mixed with natural prey items, reflecting environmental plastic contamination in this coastal fishing area.
Study of feeding biology and diet-associated microplastic contamination in selected creek fishes of northeastern Arabian Sea: A multi-species approach
Researchers studied the feeding biology and diet-associated microplastic contamination of selected fish species, finding that feeding habits directly influence the quantity and type of microplastics ingested. The results demonstrate that trophic position and prey preferences are key predictors of microplastic exposure in wild fish.
Does the trophic guild influence microplastic ingestion in nursery areas? A case study on a southwestern Atlantic mangrove-dominated estuary
Researchers analyzed microplastic ingestion in ten fish species from a mangrove-dominated estuary in Brazil's Tropical Atlantic, finding plastics in 61% of 145 specimens. Zooplanktivorous species ingested the most (averaging 2.33 MPs per individual), with polystyrene and polypropylene dominating.
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.