Effect of Acute Exposure of the Organophosphate Insecticide Rogor on Some Biochemical Aspects ofClarias batrachus(Linnaeus)

Indian catfish (Clarias batrachus), a common fish of commercial importance, was exposed to a sublethal concentration (1/3 of 96 h LC50 value) of Rogor for periods ranging from 24 to 192 h. The changes in glycogen, lactate, lactate dehydrogenase, and glycogen phosphorylase (a,ab) contents of muscle tissue were studied. A gradual decrease in muscle glycogen and an increase in lactate contents were observed. The activity level of lactate dehydrogenase showed a sharp rise initially for 48 h followed by a decline after 96 and 192 h. The glycogen phosphorylaseaandabin muscle tissue enhanced in response to Rogor exposure.