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Impact of secondary microplastics high-density polyethylene in fish feed and its possible adsorbent monocrotophos in aquatic media on tissue protein and catalase activity in Anabas testudineus
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This study examined the combined effects of high-density polyethylene microplastics and the pesticide monocrotophos on climbing perch (Anabas testudineus), assessing impacts on tissue protein levels and catalase enzyme activity. Results showed that co-exposure to both pollutants caused greater disruption to fish biochemistry than either contaminant alone.
The aquatic pollution has increased manifold in recent years due to various sources like pesticides from agricultural runoff and the disintegration of plastics into various types of microplastics (MPs). In the current study, the Climbing perch (Anabas testudineus) is exposed to Monocrotophos (MCP) (36% S.L.) and fish feed contaminated with secondary MPs high-density polyethylene or HDPE (>10%) for 3 days (72 hours). The biochemical parameters like the levels of protein and the enzymatic activity of catalase (CAT) in the liver and muscle tissues of the fishare evaluated. The results of the treatment as compared to the control reveal that there is a decreasing trend in the protein content and increased CAT activity. The results statistically suggest HDPE as an adsorbent of MCP and that tissue protein level and CAT activity can be used as potential biomarkers to examine the toxicity level of MPs in water and its effect in combination with contaminants like pesticides on fishes.
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Researchers exposed juvenile Nile tilapia to a pesticide and polyethylene microplastics, both individually and in combination, and measured blood chemistry changes and organ damage over 15 days. The combination treatment caused more severe effects than either pollutant alone, including reduced red blood cell counts, elevated liver enzymes, and significant tissue damage to the gills and intestines. The study demonstrates that microplastics can worsen the toxic effects of agricultural pesticides on commercially important fish species.
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Researchers exposed rainbow trout to polystyrene microplastics combined with the pesticide chlorpyrifos and found that the combination significantly reduced key nutritional parameters (protein, lipid, and moisture content) in muscle tissue compared to either contaminant alone.
The impact of combined exposure to triphenyltin and microplastics on the oxidative stress, energy metabolism, and digestive function of common carp (Cyprinus carpio)
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Exposing common carp to triphenyltin and microplastics individually and in combination found that combined exposure caused greater oxidative stress, disrupted energy metabolism more severely, and more strongly impaired digestive enzyme activity than either pollutant alone.
Sub‐Chronic Bisphenol‐A Toxicity in Climbing Perch, Anabas testudineus : Insight Into Metabolic Disruption, Oxidative Stress, and Histopathological Changes
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Researchers exposed climbing perch (Anabas testudineus) to sub-chronic doses of bisphenol-A, a plasticizer commonly released from degrading microplastics. The study found that BPA exposure caused significant metabolic disruption, oxidative stress, and histopathological damage in the fish, highlighting the indirect health risks that microplastic-derived chemicals pose to aquatic organisms.
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