Evaluation of Copper Acute Toxicity in Common Carp (Catla Catla L.)

The main aim of the toxicological evaluations are estimating the maximum dose that may be tolerated by animals throughout their life time without showing any adverse effect. The lethality of a toxicant to a particular organism is expressed in terms of mortality and time. The LC50 is the concentration of a chemical which kill 50 % in a group of experimental aquatic animals with in a given time period. Thus, the toxicity of a copper is evaluated in this study and identified 260ug/l copper kills 50 % of fish Catla catla. This is highly helpful in the determination of safe level (or) tolerable level of copper to the aquatic environment.