Enzymatic changes in tissues of fish, Cirrhinus mrigala under lethal and sublethal exposure to cypermethrin (10% EC)

The effect of Cypermethrin (10% EC) formulations at sublethal and lethal concentrations on certain enzymes in tissue such as Aspartate Amino Transferase (AAT), Alanine Amino Transferase (ALAT), Acid Phosphatase (ACP)of the freshwater fish, Cirrhinus mrigala during and after the cessation of the exposure were observed. Ten fishes were exposed to the lethal and sublethal concentrations for a period of 4 days were sacrificed and tissues such as gill, kidney, liver, brain and muscle were analysed for biochemical parameters and remaining five fish were maintained in a clean well water for a period of seven days without test substance being spilled in the water and its tissues were collected after reversal period for biochemical analysis. Marked changes were observed in the biochemical parameters of the fish exposed and after the cessation of the exposure. Hence the present study has been under taken to study the effect of Cypermethrin 10% EC formulation at sublethal and lethal concentrations to fish.