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61,005 resultsShowing papers similar to Entanglement and ingestion of microfibers by the oyster pea crab Zaops ostreum, an endosymbiont of the eastern oyster Crassostrea virginica.
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.
Quantity and types of microplastics in the organic tissues of the eastern oyster Crassostrea virginica and Atlantic mud crab Panopeus herbstii from a Florida estuary
Eastern oysters and mud crabs from a Florida estuary were found to contain microplastics in their soft tissues, with fibers as the dominant type, while water samples confirmed ongoing microplastic inputs from the surrounding watershed. The study documents microplastic bioaccumulation in both a commercially important bivalve and a key benthic predator in a US Atlantic coast estuary.
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.
Trophic level transfer of microplastic: Mytilus edulis (L.) to Carcinus maenas (L.)
Researchers fed mussels pre-loaded with fluorescent polystyrene microspheres to crabs and detected the particles in haemolymph, hepatopancreas, ovary, and gills — demonstrating for the first time that microplastics can transfer naturally across a trophic level and translocate into the circulatory system of a predator.
Microplastic accumulation via trophic transfer: Can a predatory crab counter the adverse effects of microplastics by body defence?
Trophic transfer and accumulation of microplastics were studied in a predatory crab to examine whether predation from lower trophic levels contributes to microplastic body burden. The study found that the crab accumulated microplastics through both filter feeding from water and consumption of contaminated prey, suggesting that higher trophic predators cannot fully avoid microplastic exposure through dietary selectivity.
Microplastic pollution in wild populations of decapod crustaceans: A review
Researchers reviewed the occurrence and characteristics of microplastics found in wild populations of decapod crustaceans including crabs and shrimps. They found that fibrous microplastics smaller than 1 mm were the most commonly detected type, and that edible portions generally contained fewer microplastics than non-edible parts. The review highlights the importance of understanding microplastic contamination in commercially valuable crustaceans for both ecological and food safety assessments.
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.
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.
The world is your oyster: low-dose, long-term microplastic exposure of juvenile oysters
Juvenile oysters were exposed to polystyrene microbeads at three concentrations for 80 days to test long-term, low-dose effects, with microbeads detected in the intestines of exposed oysters but no significant impacts on growth, body condition, or lysosomal stability. The study suggests oysters can tolerate chronic low-level microplastic exposure without major physiological harm.
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.
Microplastic Content in Oysters (Crassostrea virginica) from South Carolina, USA
Researchers analyzed microplastic content in oysters, water, and sediments from four estuaries in South Carolina, USA, quantifying contamination levels across these matrices in the commercially important Eastern oyster Crassostrea virginica.
The relationship between microplastics in eastern oysters (Crassostrea virginica) and surrounding environmental compartments in Long Island Sound
This study measured microplastics in eastern oysters, water, marine snow, and sediment in Long Island Sound and found low overall concentrations, with sediment having the most plastic. Few polymer types were shared between oysters and the surrounding environment, suggesting oysters are not efficient indicators of local microplastic pollution despite being widely used as biomonitors. The results help refine what kinds of plastic particles reach seafood consumers versus what remains in the broader 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 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.
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.
Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).
Researchers exposed the oyster Crassostrea gasar to environmentally sourced polyester microfibers at 0.5 mg/L and found accumulation in gill and digestive gland tissues, with evidence of clearance after a depuration period, raising concerns about microfiber effects on bivalve aquaculture.
Novel microplastic dosing approach of shellfish prey reveals highly efficient egestion rates by predatory crabs under environmentally realistic feeding scenarios
Researchers developed a novel method for dosing shellfish prey with microplastics under environmentally realistic conditions and then fed the contaminated prey to predatory crabs. They found that the crabs egested microplastic fibers with high efficiency, suggesting limited tissue accumulation through trophic transfer under these conditions. The study highlights the importance of using realistic exposure methods when assessing microplastic transfer through marine food webs.
Microplastic Concentrations in Two Oregon Bivalve Species: Spatial, Temporal, and Species Variability
Pacific oysters and razor clams from Oregon were found to contain microplastics, with concentrations varying by species, location, and season. The findings have direct relevance for human health since both species are commercially harvested and consumed.
Experimental ingestion of fluorescent microplastics by pacific oysters, Crassostrea gigas, and their effects on the behaviour and development at early stages
Pacific oyster embryos exposed to polystyrene microbeads showed increased developmental malformations at concentrations above 1 milligram per liter, and 3-day-old larvae exposed briefly to the same concentrations ingested particles in their digestive tract and showed reduced swimming speeds. The study highlights early larval stages as particularly sensitive windows for microplastic-induced developmental disruption.
Ingestion of Plastic Microfibers by the Crab Carcinus maenas and Its Effect on Food Consumption and Energy Balance
Researchers fed polypropylene rope microfibers to the shore crab Carcinus maenas and found that fibers were retained in the gut for extended periods and reduced energy consumption — a measure of metabolic impact. The study is one of the first to demonstrate that fiber-shaped microplastics, not just spherical particles, can impair physiological function in a commercially important crustacean.
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.
Do Polystyrene Beads Contribute to Accumulation of Methylmercury in Oysters?
Researchers studied whether polystyrene microplastic beads contribute to methylmercury bioaccumulation in oysters (Crassostrea gigas), examining the sorption of methylmercury onto plastic beads and evaluating whether ingestion of contaminated beads elevated mercury levels in oyster tissue.
Interrelationship of microplastic pollution in sediments and oysters in a seaport environment of the eastern coast of Australia
Microplastics were found in sediments and oysters in and around a major Australian seaport, with concentrations higher in port environments than reference sites and correlated with local shipping and industrial activity. The study demonstrates that seaports are significant local sources of microplastic contamination in coastal ecosystems.
Effects of Vibrio vulnificus and Microcystis aeruginosa co-exposures on microplastic accumulation and depuration in the Eastern Oyster (Crassostrea virginica)
Researchers studied how exposure to harmful bacteria, including Vibrio and Microcystis species, affects the ability of Eastern oysters to accumulate and clear out microplastics. They found that bacterial co-exposure reduced the oysters' filtration rates, causing them to retain more microplastics for longer periods. The study suggests that climate-driven increases in harmful bacteria could worsen the microplastic burden in commercially important shellfish.
Presence of microplastics in benthic macroinvertebrates along the Kenyan coast
This study found microplastics in an oyster species and three crab species collected along the Kenyan coast, with fibers being the dominant particle type. The detection of microplastics in common coastal invertebrates in Kenya raises concerns about human exposure through traditional seafood consumption in East African coastal communities.