SPECIES-DIFFERENCES IN GLUTATHIONE-DEPENDENT ENZYMES IN THE LIVER ANDKIDNEY OF 2 FRESH-WATER FISHES AND THEIR IMPLICATIONS FOR CADMIUM TOXICITY

The protective effects of glutathione-dependent enzymes have been stud ied against cadmium toxicity in the liver and kidney of two fresh wate r fishes Channa punctatus and Clarias batrachus. Specie's differences in the activity of tissue enzymes have also been studied. Cadmium trea tment induced lipid peroxidation in the liver and kidney of both speci es, the kidney being the more susceptible. Enzymological observations revealed that Channa punctatus is better equipped with conjugating enz ymes than Clarias batrachus. Fish having higher activities of these en zymes are thus expected to withstand oxidative stress more effectively .