Abstract

EFFECT OF ETHION (50%EC) ON ENZYMATIC ACTIVITIES OF AAT AND ALAT IN FRESHWATER FISH LABEO ROHITA (HAMILTON)

Ch. Prasanna, A. Anitha and *V. Venkata Rathnamma

Abstract

The ability to predict the effects of pollutants or chemicals on organisms and to extrapolate toxicant effects from laboratory to population and community levels has become a very important factor. The Indian major carp Labeo rohita freshwater fish were exposed to lethal (1.2ppm/l) and sub-lethal (0.12ppm 1/10th of lethal) concentrations for 5th, 10th and 15th days of Ethion (50%EC) to examine the enzymatic activity, in different tissues like gill, liver, kidney, brain and muscle and control group were also maintained in all the exposure periods. Alanine aminotransferase (ALAT) and Aspartate aminotransferase (AAT) are liver specific enzymes which are more sensitive measure of hepatotoxicity and histophathalogical changes. The activity levels of AAT and ALAT were increased in all tissues of sublethal concentrations compared with controls when exposed in, 5th, 10th and 15th day. The AAT activity levels in the control fish were in the order of: Brain Kidney > Gill >Brain.

Keywords: Labeo rohita, sub-lethal concentration, ethion, AAT and ALAT.