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The article presents the results of biochemical studies on the state of the antioxidant liver system of alien fish of the Samara Bay of the Zaporizke Reservoir (Dnipropetrovsk Region, Ukraine) on the example of the Prussian carp and pumpkinseed. The biochemical parameters, which indicate the essential sensitivity of the enzymatic activity of superoxide dismutase, catalase and glutathione peroxidase, as well as the level of malate dialdehyde in Prussian carp Carassius gibelio (Bloch, 1782), compared to the pumpkinseed Lepomis gibbosus (Linnaeus, 1758), are determined. The obtained results indicate an increase in the catalase and superoxide dismutase activity in the liver of experimental species of fish, which plays an important role in the consistent elimination of superoxide anion and hydrogen peroxide during the intensive metabolic transformations occurring in the tissue. It is noted that the activity of enzymes and levels of malondialdehyde depend on the state of the antioxidant system of fish, anthropogenic loading on the aquatic environment, the influence of many environmental factors, seasonality and nutrition of each alien species.

Liver antioxidant system of the Prussian carp and pumpkinseed as response to the environmental change