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61,005 resultsShowing papers similar to Compartment-wise distribution of microplastics from Indus River dolphins.
ClearShape-wise distribution of microplastics in Indus River dolphins in this study.
Researchers documented the shape-wise distribution of microplastics recovered from Indus River dolphins (Platanista minor), finding fibers to be the most prevalent morphology among MPs detected in the gastrointestinal tracts of five stranded individuals. The data provide supplementary characterisation of plastic particle types accumulating in this critically endangered freshwater cetacean.
First characterization and risk assessment of microplastics in the endangered Indus River dolphin (Platanista minor): Implications for conservation strategies
Researchers found microplastics in the complete gastrointestinal tracts of five endangered Indus River dolphins (Platanista minor) stranded between 2019 and 2022, with an average of 286 MPs per individual, predominantly fiber-shaped PET particles. Polymer risk assessment revealed medium to high ecological risk levels, representing the first baseline data on MP pollution in this critically endangered freshwater cetacean.
Color-wise distribution of MPs in this study.
Researchers characterised the color distribution of microplastics found in the gastrointestinal tracts of five endangered Indus River dolphins (Platanista minor) stranded along the Indus River between 2019 and 2022. The color-wise breakdown supplements broader findings showing an average of 286 MPs per individual, with particle properties suggesting accumulation through both prey consumption and incidental ingestion.
Ecological risk assessment of MP polymers.
Researchers performed an ecological risk assessment of microplastic polymers identified in the gastrointestinal tracts of five Indus River dolphins (Platanista minor), evaluating the hazard posed by the polymer types and concentrations detected. The assessment contributes to understanding the ecological implications of MP accumulation in this critically endangered freshwater cetacean.
Microplastics in marine mammals stranded around the British coast: ubiquitous but transitory?
Researchers examined whole digestive tracts of 50 stranded marine mammals from 10 UK species and found microplastics in every animal (mean 5.5 particles). The low numbers and predominance in stomachs versus intestines suggest particles are largely transitory rather than accumulating permanently in marine mammal guts.
Evaluating the presence of microplastics in striped dolphins (Stenella coeruleoalba) stranded in the Western Mediterranean Sea
Researchers analyzed three decades of intestinal content data from Western Mediterranean striped dolphins stranded over 30 years, finding microplastics in 90.5% of dolphins, making it one of the highest contamination rates reported in cetaceans.
First report from North America of microplastics in the gastrointestinal tract of stranded bottlenose dolphins (Tursiops truncatus)
This study reported the first North American case of microplastics in the gastrointestinal tracts of stranded bottlenose dolphins, finding particles in the majority of animals examined. The detection of microplastics in apex marine predators like dolphins indicates that plastic contamination has penetrated far up the marine food chain.
Microplastics in marine mammals stranded around the British coast: ubiquitous but transitory?
Researchers examined the entire digestive tracts of 50 stranded marine mammals from 10 species around the British coast and found microplastics in every single animal. However, the relatively low particle counts suggest that microplastics may pass through the gut rather than accumulate permanently. The findings indicate that microplastic ingestion is ubiquitous among marine mammals, though the long-term health consequences remain unclear.
Microplastics in the stomach contents of common dolphin (Delphinus delphis) stranded on the Galician coasts (NW Spain, 2005–2010)
Researchers found microplastics in the stomach contents of common dolphins (Delphinus delphis) stranded on Galician coasts between 2005 and 2010, providing the first record of microplastic presence in the digestive tracts of marine mammals from this region.
A Quantitative Analysis of Microplastics in the Gastrointestinal Tracts of Odontocetes in the Southeast Region of the United States
Researchers quantified microplastic accumulation in the gastrointestinal tracts of toothed whales from the southeastern United States. The study found microplastics present in all examined specimens, indicating that these marine mammals are routinely ingesting microplastic particles from their ocean environment.
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.
Plastic, It’s What’s for Dinner: A Preliminary Comparison of Ingested Particles in Bottlenose Dolphins and Their Prey
Researchers compared the types of microplastics found in the stomachs of bottlenose dolphins in Sarasota Bay, Florida, with those found in their prey fish. They found that 97% of prey fish contained suspected microplastics, primarily fibers in the gastrointestinal tract, but the particle types did not fully match those found in dolphin samples. The study suggests that contaminated prey may be one pathway for dolphin microplastic exposure, though additional sources likely contribute.
Microplastic Occurrence in the Gastrointestinal Tract of a Risso’s Dolphin Grampus griseus in the Northeastern Mediterranean Sea
A stranded Risso's dolphin in the northeastern Mediterranean was found to contain 454 microplastic particles in its gastrointestinal tract. Fibers and fragments were the most common forms, including polypropylene and polyethylene. This case study documents microplastic ingestion by a cetacean species and contributes to growing evidence of widespread plastic contamination in Mediterranean marine mammals.
Toward an Improved Understanding of the Ingestion and Trophic Transfer of Microplastic Particles: Critical Review and Implications for Future Research
A comprehensive review of over 800 species found that while microplastics are routinely found in the digestive tracts of aquatic organisms, they do not appear to bioaccumulate or biomagnify through food webs, with over 99% of observations locating particles in the gastrointestinal tract rather than tissues. The review calls for more standardized sampling and reporting to enable better temporal and spatial trend analysis.
Microplastics in the digestive tracts of 7 whale species
Researchers examined microplastic pollution in the digestive tracts of 12 individual whales across seven species, including freshwater and nearshore species. The study characterized microplastic pollution levels and types across different parts of the digestive system, providing data on how large marine mammals are exposed to microplastic contamination.
Microplastics in gastric samples from common bottlenose dolphins (Tursiops truncatus) residing in Sarasota Bay FL (USA)
Microplastics were detected in gastric samples from common bottlenose dolphins residing in Sarasota Bay, Florida, confirming that even marine mammals in a relatively studied coastal area are exposed to plastic debris. The results add to evidence that microplastics are widespread in the marine food web and that dolphins serve as useful sentinels for coastal pollution.
Microplastic Characteristic Found in Gastrointestinal Tract of Pelagic and Demersal Fishes in Tuban, East Java
Researchers found microplastics in the gastrointestinal tracts of both pelagic and demersal fish species, documenting plastic ingestion across different feeding guilds and ocean depths. The study adds to growing evidence of widespread microplastic contamination throughout marine food webs.
Cetaceans and microplastics: First report of microplastic ingestion by a coastal delphinid, Sousa chinensis
Researchers reported the first documented case of microplastic ingestion by the Indo-Pacific humpback dolphin (Sousa chinensis), finding microplastics in the intestinal contents of both adult and calf individuals. The findings indicate that both prey consumption and unintentional ingestion are likely exposure pathways for microplastic accumulation in this coastal cetacean species.
Fourier transform infrared (FTIR) analysis identifies microplastics in stranded common dolphins (Delphinus delphis) from New Zealand waters
Researchers found microplastics in all 15 stranded common dolphins examined from New Zealand, averaging 7.8 pieces per stomach, with polyethylene terephthalate fibers and polypropylene fragments as the dominant polymer types and no correlation between MP load and biological parameters.
Occurrence of microplastics in fish gastrointestinal tracts belongs to different feeding habits from the Bangladesh coast of the Bay of Bengal
Researchers examined the gastrointestinal tracts of six commercial fish species from the Bangladesh coast of the Bay of Bengal and found microplastics in all species studied. A total of 696 microplastic particles were identified, ranging from 0.3 to 5 millimeters in size, with varying contamination levels across different feeding habits. The study highlights that microplastic pollution is widespread in commercially important fish from this region.
Occurrence of microplastics in gastrointestinal tracts of planktivorous fish from the Thoothukudi region
Planktivorous fish from the Thoothukudi region of southern India were surveyed for microplastic ingestion, with plastics found in a high proportion of the 677 individuals examined across multiple species. The results demonstrate that passive ingestion during filter feeding makes planktivorous fish particularly susceptible to microplastic exposure.
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.
7种鲸类消化道中微塑料
Researchers examined microplastic pollution in the digestive tracts of 12 individual whales from seven different species, including freshwater and nearshore varieties. The study characterized microplastic pollution levels across different parts of the digestive system and provided policy recommendations based on the contamination patterns observed.
Prevalence of microplastics in commonly consumed fish species of the river Old Brahmaputra, Bangladesh
Researchers found microplastics in nearly 59% of edible fish from Bangladesh's Old Brahmaputra river, with polyethylene fibers and pellets dominating, and ingestion rates linked to fish size, feeding behavior, and downstream location.