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Species-specific effects of microplastics on juvenile fishes
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Researchers found that microplastic effects on juvenile fish are species-specific, with carnivorous largemouth bass showing more severe intestinal morphological damage and inflammatory responses compared to herbivorous grass carp and omnivorous Jian carp.
Microplastics contamination have been extensively reported in aquatic ecosystem and organisms. It is wildly acknowledged that the ingestion, accumulation and elimination of microplastics in fishes are species-specific, which mainly depending on the feeding behavior. This study aimed to investigate the effects of microplastics on the morphology and inflammatory response in intestines of fishes with different feeding types. Largemouth bass (carnivorous fish), grass carp (herbivorous fish) and Jian carp (omnivorous fish) were used as organism model. The contributing concentration and size of microplastics were explored as well as the response time and legacy effect in fishes. Two different sizes of polystyrene microplastics (80 nm and 8 μm) were set at three concentrations. And samples were analyzed at different exposure times and depuration times. Histological analysis indicated that multiple abnormalities in intestines were presented in three species fishes after acute exposure microplastics. The mRNA abundance of immune-related genes in the intestine tissues of fishes were significantly fluctuant. There were differential expressions of genes coping with differential sizes and concentrations of microplastics exposure in different fishes. The reason for the difference effects of microplastics on fishes was still unclear but could be due to the difference in the structure and function of the digestive system. These results provided a theoretical basis to further analysis of the mechanism of fish intestinal pathology caused by microplastics.
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Species-Specific Effects of Microplastics On Juvenile Fishes
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This study found that polystyrene microplastics cause intestinal inflammation and tissue damage in three fish species with different feeding habits, with effects varying by fish diet type, plastic size, and exposure duration. The findings show that microplastic-induced gut harm in fish is species-specific, complicating risk assessments for wild fish populations.
Species-specific effect of microplastics on fish embryos and observation of toxicity kinetics in larvae
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Researchers compared microplastic ingestion across three commercial fish species with different feeding types (carnivores, omnivores, filter feeders), finding that carnivores ingested the least microplastic while omnivores were less able to eliminate them than filter feeders.
Effects of Virgin Microplastics on Growth, Intestinal Morphology and Microbiota on Largemouth Bass (Micropterus salmoides)
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Researchers found that exposure to virgin microplastics at environmentally relevant concentrations impaired growth, caused intestinal morphological damage, and altered gut microbiota composition in largemouth bass, suggesting that microplastic ingestion poses health risks in commercially important aquaculture species.
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Researchers analyzed microplastic ingestion in commercially important fish species, evaluating how biological and environmental factors influence ingestion rates across 2,222 individual fish. The study assessed gastrointestinal tract contents to determine the extent and patterns of microplastic contamination. The findings suggest that both species-specific biology and environmental conditions play important roles in determining microplastic ingestion levels in commercial fish.
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