A COMPARATIVE STUDY OF THE BIOACCUMULATION OF PCB 126 IN THE INTESTINE TISSUE OF FRESHWATER FISH RASBORA DANICONIUS AND PUNTIUS TICTO (HAM.)Abstract
Two species of freshwater fish, Rasbora daniconius and Puntius ticto, were procured from a local freshwater body. They were subjected to chronic exposure by a daily sub-lethal dose of PCB 126, by use of a continuous flow-through method, for a period of 30 days. Estimation of bioaccumulation of PCB 126 in the intestine tissues of the fish was carried out at intervals of every 5 days using suitable clean-up methods. The extent of bioaccumulation of PCB 126 per gram wet weight of tissue in the eluate obtained after the cleanup process was assessed with the help of GC-MS. Both species of the test fish showed bioaccumulation in varying concentrations in the intestine tissue. A comparison of the PCB 126 values at the end of the experimental period of 30 days shows that there is an appreciably greater extent of bioaccumulation of PCB 126 in intestine tissue of the freshwater fish, Rasbora daniconius as compared to that of Puntius ticto.