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20 resultsShowing papers similar to Developmental Polyethylene Microplastic Fiber Exposure Entails Subtle Reproductive Impacts in Juvenile Japanese Medaka (Oryzias latipes)
ClearChronic microfiber exposure in adult Japanese medaka (Oryzias latipes)
Adult Japanese medaka fish chronically exposed to polyester and polypropylene microfibers showed histological changes in gut and liver, altered gene expression in inflammation and oxidative stress pathways, and disrupted reproductive output, demonstrating tissue-level harm from realistic fiber concentrations.
Chronic dietary exposure to polystyrene microplastics in maturing Japanese medaka (Oryzias latipes)
Japanese medaka fish were fed diets containing polystyrene microplastics for 10 weeks during maturation, finding no tissue translocation or behavioral changes but a dose-dependent decrease in egg production in mature females. The results suggest chronic dietary MP exposure may impair reproduction even without systemic distribution.
Synthetic microfiber exposure negatively affects reproductive parameters in male medaka (Oryzias latipes)
Researchers exposed male medaka fish to fiber-type microplastics and found disruptions to the hormonal pathway that regulates reproduction. The microfibers triggered abnormal expression of reproductive hormones and induced vitellogenesis, a process normally occurring only in females, indicating endocrine disruption. The study suggests that microfiber ingestion may impair reproductive capacity in fish by interfering with hormonal signaling.
A Holistic Assessment of Polyethylene Fiber Ingestion in Larval and Juvenile Japanese Medaka Fish
Japanese medaka larvae and juveniles exposed to environmentally relevant concentrations of polyethylene fibers showed intestinal histological changes, altered gut microbiota composition, and disrupted lipid metabolism, with effects dependent on both exposure concentration and the developmental stage at which exposure occurred.
Chronic feeding exposure to virgin and spiked microplastics disrupts essential biological functions in teleost fish
Researchers fed zebrafish and marine medaka environmentally relevant concentrations of virgin and chemically spiked polyethylene and PVC microplastics over four months. While classical biomarkers showed no changes, significant decreases in growth and disruptions to reproduction, gut integrity, and liver function were observed. The findings suggest that chronic dietary exposure to microplastics can disrupt essential biological functions in fish even without triggering traditional toxicity markers.
Effects of laundry-derived microplastic fibers on larval Japanese medaka (Oryzias latipes)
Researchers exposed Japanese medaka fish larvae to laundry-derived microplastic fibers for 21 days and observed the fluorescent fibers accumulating primarily in the mouth, gut, and feces. While no mortality occurred, the higher concentration treatment reduced body length and weight and altered metabolic and gut bacterial profiles. Most fibers were expelled during a depuration period, though longer fibers tended to remain trapped in the gastrointestinal tract.
Some Behavioural and Physiological Effects of Plastics (Polyethylene) on Fish
Researchers examined behavioral and physiological effects of polyethylene microplastics on fish, finding that plastic exposure disrupted endocrine function, altered behavior, and impaired normal development and reproduction.
Intestinal Accumulation of Polyester Microfibers Modulates HPG Axis Regulation and Oocyte Maturation in Zebrafish (Danio rerio)
Scientists found that tiny plastic fibers from clothing (called microfibers) can build up in fish intestines and disrupt their hormone systems, affecting how their eggs develop. While this study was done in zebrafish, it's concerning because humans also consume these plastic fibers through seafood and drinking water. This research suggests that microplastic pollution may be interfering with reproductive health in ways we're just beginning to understand.
Subtle reproductive toxicity of microplastics in Pelteobagrus fulvidraco: Evidence from chronic exposure during gonadal development
Researchers chronically exposed yellow catfish from hatching through gonadal development to PE and PP microplastics and found marked histopathological damage to testicular tissue — especially from PE — without significant effects on survival or sex ratio, suggesting subtle reproductive toxicity that standard acute tests would miss.
Environmentally relevant concentrations of microplastics modulated the immune response and swimming activity, and impaired the development of marine medaka Oryzias melastigma larvae
Researchers found that environmentally relevant concentrations of microplastics impaired immune responses, swimming behavior, and larval development in marine medaka fish, demonstrating that even low-level exposure poses ecological risks.
Effects of microplastic exposure on the gonadal structure and reproductive success of Danio rerio (Teleostei: Cypriniformes)
This Brazilian study exposed zebrafish to two concentrations of microplastics for 30 days and assessed effects on gonadal structure and reproductive success using histology and hormone assays. Microplastic exposure disrupted reproductive biology in both males and females, raising concerns about how environmental microplastic contamination affects fish reproduction.
Organic contaminants sorbed to microplastics affect marine medaka fish early life stages development
Researchers investigated how polyethylene microplastics carrying adsorbed environmental contaminants affect the early life stages of marine medaka fish. The study found that while virgin microplastics alone showed no significant effects, microplastics spiked with benzo(a)pyrene, PFOS, or benzophenone-3 caused developmental impacts in embryos and larvae, demonstrating that microplastics can act as carriers that deliver toxic chemicals to developing fish.
Environmental microplastics accumulate in gonads in a sex-dependent manner and alter reproductive success in zebrafish (Danio rerio)
Zebrafish exposed to environmentally sourced microplastics accumulated particles preferentially in the testes rather than ovaries, and males showed the highest gonadal microplastic loads along with PCB co-contaminant effects including inhibited apoptosis and hepatotoxicity.
Exposure to microplastic fibers does not change fish early life stage development of three-spined sticklebacks (Gasterosteus aculeatus)
Exposure of three-spined stickleback eggs and larvae to microplastic fibers at environmentally relevant concentrations had no significant effect on fertilization success, hatching rates, embryonic survival, or early larval development, suggesting that microplastic fibers alone may not impair early life stages of this species under realistic conditions.
Effects of microfiber exposure on medaka (Oryzias latipes): Oxidative stress, cell damage, and mortality
Japanese medaka fish exposed to polyester microfibers showed elevated oxidative stress, cell membrane damage, and increased mortality compared to controls. The study identifies microfibers, which are discharged from laundry via wastewater treatment plants, as a biologically active marine contaminant capable of causing measurable harm to fish.
Polystyrene microplastics cause tissue damages, sex-specific reproductive disruption and transgenerational effects in marine medaka (Oryzias melastigma)
Researchers exposed marine medaka fish to environmentally realistic concentrations of polystyrene microplastics and found tissue damage, oxidative stress, and sex-specific reproductive disruption. The effects carried over to the next generation even without direct microplastic exposure. The study provides evidence that microplastics at levels found in the ocean can cause lasting biological harm across generations in fish.
Adaptation of life-history traits and trade-offs in marine medaka (Oryzias melastigma) after whole life-cycle exposure to polystyrene microplastics
Researchers conducted a whole-life-cycle exposure of marine medaka to polystyrene microplastics and observed effects on hatching, growth, and reproduction across generations. Microplastics accumulated on eggshells, reduced hatching rates and larval body length, and altered reproductive investment strategies. The study suggests that chronic microplastic exposure can trigger life-history trade-offs in fish, potentially affecting population dynamics over multiple generations.
Early warning signs of endocrine disruption in adult fish from the ingestion of polyethylene with and without sorbed chemical pollutants from the marine environment
Researchers fed Japanese medaka fish environmentally sourced marine plastic pellets for two months and observed significant downregulation of key estrogen-related genes — including vitellogenin and estrogen receptor — in both sexes, providing early evidence that plastic debris ingestion at realistic concentrations can disrupt endocrine function in adult fish.
Bioaccumulation and reproductive effects of fluorescent microplastics in medaka fish
This study exposed both freshwater and marine medaka fish to fluorescent polystyrene microplastics for three weeks, finding bioaccumulation in multiple tissues and reduced reproductive output in freshwater medaka, with bioaccumulation factors differing between the two species.
Effects of life cycle exposure to polystyrene microplastics on medaka fish (Oryzias latipes)
Researchers exposed medaka fish to irregularly shaped polystyrene microplastics for 150 days across their life cycle and found that while growth and reproduction were largely unaffected, the study highlights the importance of using environmentally realistic particle shapes and sizes in long-term exposure studies.