Oxidative stress and antioxidant enzymes in tissues of freshwater fishes as biomarkers of aquatic pollution

摘要

Our present study deals with the evaluation of oxidative stress due to pollutants which results in disastrous effect in aquatic ecosystems. Lipid hydroperoxide, lipid per oxidation (LPO), and the antioxidant enzyme levels were estimated. The lipid peroxide and lipid hydro peroxide levels were found to be increased in the organs - liver and kidney of Rohu (Labeo rohita) and Tilapia (Oreochromis niloticus) from the polluted site. CAT and SOD activity seems to be reduced in organ samples of both the fishes. Changes in the antioxidant enzymes, lipid per oxide and lipid hydro peroxide levels that was observed indicates the presence of pollutants in the Varahanadhi River.