Stress Induced Status Of Blood Ammonia And Blood Urea With Reference To Hepatic Glutamate Dehydrogenase In Freshwater Fish, Labeo rohita.

Ammonia, being highly toxic and readily soluble in water, is excreted by aquatic animals like fishes. However, scarcity of water in the surrounding medium, may force the fishes to convert ammonia into urea. In the present study, the possible role of ureogenesis to avoid accumulation of toxic ammonia under water-restricted condition was tested in Labeo rohita. Blood urea and ammonia were estimated in the blood of the fishes and glutamate dehydrogenase acitivity was measured in the hepatic tissue. From the present study, however, it is found that the relationship between blood ammonia and blood urea in Labeo rohita and the possible role of glutamate dehydrogenase is not so pronounced in the experimental fish species.