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61,005 resultsShowing papers similar to Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).
ClearDo Environmentally Relevant Concentrations of Microplastics Pose a Threat to the Eastern Oyster, Crassostrea Virginica?
This study exposed eastern oysters to polyester microfibers at environmentally realistic concentrations for 45 days, finding that even low doses affected their physiology including feeding, growth, and energy use. The results suggest that ecologically relevant microplastic levels may pose a threat to commercially important filter-feeding shellfish.
Microfiber Content in Pacific Oysters (Crassostrea gigas) from Morro Bay, California
Researchers measured microfiber contamination in Pacific oysters (Crassostrea gigas) from Morro Bay, California, to assess exposure levels in a commercially important shellfish species. Microfibers were detected in oysters across sampling sites, with concentrations varying by location and season, indicating consistent exposure to synthetic fiber pollution in this coastal environment.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
Researchers assessed microplastic exposure, accumulation, and depuration in European flat oysters (Ostrea edulis), a species of conservation and aquaculture interest. Oysters accumulated microplastics efficiently and required extended depuration periods to substantially reduce body burdens, with implications for food safety.
First register of microplastic contamination in oysters (Crassostrea gasar) farmed in Amazonian estuaries
This is the first study to document microplastic contamination in farmed oysters from the Amazon region of Brazil, finding that 58% of the oysters contained microplastics, mainly nylon fibers. The particles accumulated most in the oysters' digestive glands and reproductive organs. Since oyster farming is an important food source and livelihood in the Amazon, the findings highlight a need for better monitoring and depuration systems to reduce human exposure to microplastics through shellfish.
Mucus Production as a Strategy of Oysters Against Synthetic Textile Microfibers
Researchers found that oysters exposed to synthetic textile microfibers responded by producing elevated levels of protective mucus in their mantle tissue. This mucus response represents a physiological defense mechanism against microplastic ingestion but may incur energetic costs to the organism.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
Researchers evaluated microplastic accumulation and effects in European flat oysters under controlled exposure conditions, examining how filter feeding concentrates plastic particles and whether ingestion impairs oyster health. Exposure resulted in measurable microplastic accumulation in oyster tissue, with effects observed on feeding behavior and physiological condition.
Accumulation and Depuration of Microplastics by Oysters Upon the Laboratory Conditions
Researchers monitored microplastic accumulation and elimination in oysters over 30 days, finding that the digestive tract accumulated the highest concentrations (bioaccumulation factors increasing from ~10 to ~41 over 10 days), and that most particles were eliminated within 30 days of depuration.
C18 | Assessment of bioaccumulation and depuration of PET microfibres in specimens of Mytilus galloprovincialis: preliminary study
Researchers exposed Mediterranean mussels (Mytilus galloprovincialis) to varying concentrations of PET microfibers under controlled conditions and measured accumulation and depuration over time. The preliminary study found concentration-dependent accumulation with incomplete depuration, raising questions about residual MP burden in farmed bivalves intended for consumption.
Realistic Environmental Exposure of Microplastics in European Flat Oyster, Ostrea edulis: Evaluation of Accumulation and Depuration Under Controlled Conditions and Molecular Assessment of a Set of Reference Genes
Researchers exposed European flat oysters to microplastics under environmentally realistic conditions and measured their ability to accumulate and then purge the particles. They found that oysters accumulated an average of about 5 microplastic particles per gram, predominantly filaments, but a two-day depuration period reduced contamination by over 90%. The study also identified stable reference genes for molecular stress monitoring, supporting the development of standardized tools for tracking microplastic impacts on marine bivalves.
Preliminary data indicates the importance of depuration in oysters for microfibers contamination
This preliminary study investigated whether depuration — a purification process used for shellfish before sale — reduces microfiber contamination in oysters. Experimental results suggested depuration may play a role in reducing microfiber levels in oysters' soft tissues.
Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels
Researchers exposed juvenile mussels to polyester and cotton microfibers at realistic ocean concentrations for 94 days and found that polyester microfibers reduced mussel growth rates by up to 36%, suggesting that microplastic fiber pollution could harm marine ecosystems and threaten shellfish aquaculture.
Ingestion and egestion of polystyrene microplastic fragments by the Pacific oyster, Crassostrea gigas
Researchers investigated size-specific ingestion and egestion of polystyrene microplastic fragments by Pacific oysters, finding that oysters can ingest and later expel microplastics, with the process varying by particle size.
Mucus Production as a Strategy of Oysters Against Synthetic Textile Microfibers
Researchers investigated whether oysters produce increased mucus as a defense response to exposure to synthetic textile microfibers, examining mucus production in the mantle tissue. The study found elevated mucus production in microfiber-exposed oysters, suggesting a physiological defensive strategy against microplastic ingestion.
Microplastics levels in cultured or harvested mollusks non-depurated and commercially depurated at different times
Researchers measured microplastic levels in three species of commercially available bivalve mollusks at different depuration stages and found that fibers made up over 90% of the detected particles. Standard commercial depuration reduced microplastic content by 26-50% depending on the species, but extending the depuration period did not significantly improve removal rates. The study estimates that annual human consumption of these mollusks results in the ingestion of several meters of microplastic fibers per year.
Microplastic contamination in filter-feeding oyster Saccostrea cuccullata: Novel insights in a marine ecosystem
Researchers examined microplastic contamination in the filter-feeding oyster Saccostrea cuccullata collected from five coastal sites. They found microplastics present in all oyster specimens, with fibers and fragments being the most common types detected. The study highlights how filter-feeding shellfish can accumulate microplastics from surrounding waters, raising concerns about contamination in marine food chains.
Oyster as sentinels of recent microplastic contamination: Insights from a transplant experiment
Researchers used oyster transplantation experiments to study how microplastics accumulate and are excreted in sentinel organisms under field-realistic conditions. The study found that bivalves can serve as effective biomonitors of recent microplastic contamination in coastal ecosystems. The findings help fill knowledge gaps about the dynamics of microplastic uptake and clearance in marine filter feeders.
Microplastic Depuration in Two Commercially Farmed Oyster Species from the West Coast of Ireland
Researchers assessed microplastic depuration efficacy in Pacific oysters (Magallana gigas) and European flat oysters (Ostrea edulis) from Irish aquaculture over four depuration periods from 24 to 96 hours. MP concentrations in edible tissue were significantly reduced after 96-hour depuration in both species, with FTIR analysis revealing that over half of isolated fibers were of natural rather than synthetic origin.
Microplastics uptake and egestion dynamics in Pacific oysters, Magallana gigas (Thunberg, 1793), under controlled conditions
Pacific oysters were exposed to polystyrene microplastics under controlled conditions to characterize uptake, egestion via faeces, and rejection via pseudofaeces, finding that ingestion increased with MP concentration while pseudofaeces was the dominant clearance route. The study quantifies the dynamics of MP retention in a commercially important bivalve and highlights the potential for MP entry into the human food chain.
Realistic environmental exposure to microplastics does not induce biological effects in the Pacific oyster Crassostrea gigas
Pacific oysters were exposed to environmentally relevant concentrations of polyethylene and polypropylene fragments for 10 days followed by depuration, with microplastics detected in tissues but no significant effects on clearance rate, tissue integrity, antioxidant defense, or DNA damage. The results suggest that realistic environmental concentrations of these larger fragments may not cause measurable biological harm to oysters.
Toxic effects of exposure to microplastics with environmentally relevant shapes and concentrations: Accumulation, energy metabolism and tissue damage in oyster Crassostrea gigas
Researchers exposed oysters to irregularly shaped polyethylene and PET microplastics at two concentrations for 21 days and measured accumulation, energy metabolism, and tissue damage. They found that the microplastics accumulated in oyster tissues, disrupted energy metabolism, and caused histological damage, with effects varying by polymer type and concentration. The study suggests that environmentally realistic microplastic shapes and concentrations can cause measurable harm to commercially important shellfish species.
Plastic Microfibers Impact the Immune System of the Pacific Oyster
Pacific oysters (Crassostrea gigas) from Morro Bay Estuary were exposed to polyester microfibers and showed altered immune gene expression and elevated hemocyte activity, indicating that microfiber exposure triggers measurable immune system responses in commercially important shellfish.
In-situ microplastic egestion efficiency of the eastern oyster Crassostrea virginica
Researchers found that eastern oysters egested microplastics from their environment at a rate of about one particle per hour through feces, with smaller oysters being more efficient at clearing particles than larger, harvestable-sized individuals.
Abundance of microplastics in oysters Crassostrea gigas and water from a highly anthropized estuary.
Researchers measured microplastic concentrations in surface water and whole tissue of Crassostrea gigas oysters at two sites in the Bahia Blanca estuary, a highly anthropized system in Argentina with major port, petrochemical, and urban wastewater inputs. MPs ranged from 6 to 50 items/L in water and 0 to 2 items/g wet weight in oyster tissue, with transparent and blue fibers predominating in both matrices.
Impacts of microplastic fibres on the marine mussel, Mytilus galloprovinciallis
Scientists exposed marine mussels to dryer lint as a proxy for microplastic fibers from laundry and found physiological changes including reduced clearance rates and histopathological damage to gill and digestive gland tissue.