Effect of different concentrations (10 μg/l and 100 μg/l) of di-n-butyl phthalate administered for 7 days on lipid peroxidation (A), glutathione level (B), catalase activity (C) and glutathione-S-transferase (D) of liver and gills of Labeo rohita (n=5). The values are mean ± S.E.M.