Abstract

TO STUDY THE DETERMINATION OF MEDIAN TOLERANCE LIMIT (LC50) OF CLARIAS BATRACHUS FOR ZINC SULPHATE AND COPPER SULPHATE

Muneesh Kumar*, Parvinder Kumar, Lekh Raj and Sangeeta Devi

Abstract

Industries are the major sources of heavy metal pollution and it is released into water and soil. Heavy metals cause several ill effects to aquatic living organisms and environment. The acute toxicity of chosen metals (zinc sulphate and copper sulphate) against fresh water Clarias batrachus (Cat fish) and the chronic toxicity of sub lethal concentrations of heavy metals on the different organs such as liver, gill, muscle, kidney and brain of the chosen fresh water fish. Adult cat fish treated separately with zinc sulphate and copper sulphate) for 24, 48, 72, and 96hr at different dose levels showed significant behavioural changes in the Lethal concentration were determined by probit analysis method. The LC 50 values for ZnSo4, CuSo4 were found as 8.21ppm, 1.85ppm; respectively. Among the toxicants selected, CuSo4 is more toxic than ZnSo4 in cat fish.

Keywords: Lethal concentration, Clarias batrachus, Zinc sulphate and copper sulphate.