INFLUENCE OF SUB-CHRONIC EXPOSURE TO ARSENIC, CADMIUM, LEAD ON GROWTH AND ACCUMULATION OF ITS IN Oreochromis sp.

The accumulation and elimination of arsenic (As), cadmium (Cd), lead (Pb) and its effect on Oreochromis sp. growth were studied after exposing fish to 1.0, 1.5 and 3.0 mgAs/L or 0.66, 1.0 and 2.0 mgCd/L or 0.12, 0.18 and 0.33 mgPb/L for 20 days in exposure phase and 10 days in the recovery phase. As Cd and Pb significantly affect on increases in weight of fish. In the exposure phase, the ratio of Metal fish organs / Metal H2O in tissues of fish was in the order muscle >> liver > gill in the case As exposure; muscle << gill << liver for Cd exposure, and muscle << liver << gill in the case of Pb exposure. On day 10 of the recovery phase, the elimination of accumulated As, Cd, Pb in the fish organs was approximately from 12% to 29% for As, from 33% to 54% for Cd and from 14% to 39% for Pb