Abstract

The present work was carried out in the freshwater fish Cirrhinus mrigala to evaluate the toxic effect of on the physiological parameters and haematological parameters. Blood glucose and enzyme activity in the intestine, liver and kidney was also carried out. Observations made for a continuous exposure period of 96 hours. An LC50 value for 96 hours was determined and was found to be 6.5 mg/l. An increase in WBC count on exposure to different sub lethal concentrations of dimethoate was also observed.