We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Integrated response of growth, antioxidant defense and isotopic composition to microplastics in juvenile guppy (Poecilia reticulata)
AI summary Read the abstract
Guppy fish exposed to polystyrene microplastics at two concentrations for 28 days showed higher accumulation in gills than other tissues, reduced growth at high concentration, elevated oxidative stress, and shifts in stable isotope ratios indicating altered nutrient assimilation.
Microplastics (MPs) pollution becomes a research hotspot and many studies focus on threats of MPs, but few have integrated multi-level indicators to assess response to MPs of organisms. Here we exposed guppy (Poecilia reticulata) to MPs (polystyrene; 32-40 μm diameter) with two concentrations (100 and 1000 μg/L) for 28 days. We found that higher accumulation of MPs appeared in guppy gill than that in gut. MPs had no obvious effect on guppy growth but significantly inhibited the condition factor. Oxidative stress presented in guppy viscera with activated antioxidants. The decline of Na/K-ATP activity in guppy indicated that MPs might interfere with the osmotic balance of gills. MPs reduced body molar ratio of C:N and δC value, but no apparent impact on δN. It implied that MPs probably altered elemental transition. Eventually, through integrated biomarkers response index (IBR) of guppy, we found that catalase activity was the highest index in response to MPs, and the response of growth performance to MPs was lower than that of oxidative stress and element alteration. Risks of MPs aggravated in a concentration-dependent manner. These findings suggested that multi-level IBR approach should be adopted to quantify effects of MPs on aquatic organisms, especially on fish.
More Papers Like This
Effect of polystyrene microplastics on the antioxidant system and immune response in GIFT (Oreochromis niloticus)
AI summary Read the abstract
Farmed tilapia exposed to polystyrene microplastics of different sizes showed elevated oxidative stress and immune inflammation markers, particularly in the brain, compared to unexposed fish. The findings suggest chronic microplastic exposure can impair immune defenses in commercially important freshwater fish, raising concerns for both aquaculture and wild fisheries.
Exposure to microplastics impairs digestive performance, stimulates immune response and induces microbiota dysbiosis in the gut of juvenile guppy (Poecilia reticulata)
AI summary Read the abstract
Researchers exposed juvenile guppies to polystyrene microplastics at two concentrations for 28 days and examined impacts on their digestive systems. The study found that microplastic exposure impaired digestive enzyme activity, stimulated intestinal immune responses, and disrupted the gut microbiota community, suggesting that microplastics can compromise intestinal health in freshwater fish.
Effects of PS-MPs on growth, immunity, antioxidant capacity and amino acid metabolism in common carp ( Cyprinus carpio )
AI summary Read the abstract
Researchers exposed common carp (Cyprinus carpio) to polystyrene microplastics at 0, 50, 100, and 200 micrograms per liter for 15 days, finding that higher concentrations significantly reduced weight gain rates and hepatopancreas somatic indices while impairing immunity, antioxidant capacity, and amino acid metabolism. The results demonstrate dose-dependent toxic effects of PS-MPs on fish physiology at environmentally relevant concentrations.
Exposure to polypropylene microplastics via diet and water induces oxidative stress in Cyprinus carpio
AI summary Read the abstract
Researchers fed carp fish polypropylene microplastics through both food and water and found that exposure caused oxidative stress in the liver, gills, and intestines. The damage was dose-dependent, with higher microplastic concentrations causing more harm to the fish's antioxidant defense systems. Since carp is a widely consumed fish, these findings raise questions about whether microplastics in aquaculture could affect the safety of fish as human food.
Differential modulation of oxidative stress, antioxidant defense, histomorphology, ion-regulation and growth marker gene expression in goldfish (Carassius auratus) following exposure to different dose of virgin microplastics
AI summary Read the abstract
Goldfish exposed to two doses of virgin PVC microplastics for four days showed dose-dependent gill, liver, and intestinal tissue damage, elevated oxidative stress markers, disrupted antioxidant enzyme activity, and altered expression of ion-regulation and growth marker genes.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.