EFFECT OF HYPOSMOTIC STRESS ON THE CARBOHYDRATE-METABOLISM OF CRABS MAINTAINED ON HIGH PROTEIN OR CARBOHYDRATE-RICH DIET

1. Blood glucose of crabs Chasmagnathus granulata fed on high protein (HP) diet and exposed to 0 parts per thousand salinity decreases reaching nil values at 72 hr after salinity change. However, with a carbohydrate-rich (HC) diet the glycemia increases after salinity change. 2. Glycogen concentration of hepatopancreas and muscle in crabs fed HP diet increases at 72 hr after salinity change. Muscle glycogen did not change significantly. 3. Hepatopancreas and muscle glycogen in HC group is high but decreases at 24 hr after salinity change, and remains higher than the HP group until the end of the experiment.