Abstract :
Heteropneustes fossilis, the fresh water teleost fishes were exposed to sub lethal concentration 6.9 mg/l of Cd for
24, 48 ,72 , 96, hours. The order of cadmium accumulation rate was found in these tissues were liver>gills> kidney. It was
concluded that the fish liver and gills exhibited highest accumulation of heavy metals. The results showed significant fall in
all the biochemical constituents in all the tissues except glucose apparently suggest that organism's response to the toxicant
stress. The accumulation of cadmium and significant fall in the level of these biochemical constituents in these tissues was
found to increase directly. Cadmium blocks the oxidative metabolism in the tissues leading to an altered energy status in the
fish as the toxicant effect carbohydrate metabolism in liver, brain and gills. A significant increase in glucose and lactate
levels was observed while the glycogen and pyruvate contents were significantly decreased due to the toxic stress.
Keyword :
Cadmium, Glucose, Glycogen, Heteropneustes fossilis, Lactate, Pyruvate.