N. GANESH, T.R.C. GUPTA, R.J. KATTI AND K.S. UDUPA
Abstract
The Acute toxicity of copper on three life stages of common carp, Cyprinus Carpio Var. Communis. viz. 30 day, 60 day and 90 day were investigated. The 96h LC50 along with the 95% confidence limits were 0.04 (0.0389 - 0.041), 0.1234 (0.1208 - 0.1261) and 0.1577 (0.1535 - 0.162) mg Cu/I for the 30 day, 60 day and the 90 day old fish respectively. It was observed that the toxicity of copper decreases with the age of fish and that in the experiments, mortalities occurred more during the initial hours than at the end hours of the experimental period.