Effects of Cadmium Chloride on the Activity ofFour Enzymes in Gills of Mosquito FishGambusia affinis

Abstract :<br /> Gambusia affinis fishes were exposed to 2,4 and 8 mg Cd/L of water for 8 days and for 2,4, and 8 days to 10 mg Cd/L of water. Gills were used to investigate the effect of cadmium on the activity of four enzymes measured by calorimetric methods. <br /> <br /> There were no clear changes in the activity of Alkaline phosphatase at different concentrations but the activity increased at different periods of exposure to cadmium. <br /> <br /> Acid phosphatase activity showed a gradual inhibition after the first concentration, while the activity increased at the different periods. <br /> <br /> There was no change in the activity of aspartate aminotransferase (AST) at different concentrations and periods of exposure. Alanine aminotransferase (ALT) activity increased at the concentrations 2 and 8 mg Cd/L, but the activity increased after the first period and decreased gradually at other periods of exposure to the metal.