CHANGES IN GLYCOGEN AND LACTATE DEHYDROGENASE ENZYME ACTIVITY INDUCED BY THE PERMETHRIN (A SYNTHETIC PYRETHROID) TECHNICAL GRADE (TG) AND 25% EC IN THE FISH CTENOPHARYNGODON IDELLA (GRASS CARP)S. SATYANARAYANA, G. SRINIVASA RAO AND N. GOPALA RAOAbstract Permethrin, type I synthetic pyrethroid technical grade (TG) and 25% EC induced alterations in the biochemical aspects of the glycogen and Lactate dehydrogenase enzyme (LDH) activity in the fish Ctenopharyngodon idella in the laboratory after exposing them to both the lethal and sub lethal concentrations for 4 days and 10 days respectively taking into consideration of 96h, LC50 values of both the toxicants. The fish vital organs, Gill, Liver, Kidney, Brain and Muscle are studied after the exposure and found that glycogen a chief and rich energy source of the fish is utilized to cope the demand of the toxic stress. It is also observed that the lactate, (lactic acid) substrate supposed to be acted on by the enzyme Lactate dehydrogenase showed changes in the activity levels. Glycolysis, to release the sugar to have the metabolism by aerobic pathway and accumulation of the lactic acid due to stress prevailing the anaerobic pathway are also observed in the present study. |