Abstract
The effect of hexavalent chromium [Cr (VI)] on the static bioassay of
Cyprinus carpio (500±9.5g body weight) was assessed by exposing randomly selected 70 breeders to 50, 100, 150, 200, 250, 300 and 350mg/l Cr (VI) dosage for 96 hours in cemented tanks (250 rgm size) @ 10 breeders/tank under optimal conditions to find out the lethal concentration at which fifty percent mortality (LC50) has occurred. Control group containing 10 breeders / tank was also maintained for the same period. Results showed LC50 value of 191mg/l by Finney’s probit analysis. It was further observed that toxicity of Cr (VI) increased in C. carpio with the increase in time and concentration of Cr (VI) as compared to control
