Toxicity of certain pesticides to some freshwater fishes

Abstract

Static bioassay to study the toxicity of BHC, DDT, Dieldrin and Aldrin to freshwater fishes, Heteropneustes fossilis, Cyprinus carpio and Channa punctatus was carried out under laboratory conditions. The 24-, 48- and 96-h LC5o values with confidence intervals, slope function values and correlation coefficient were calculated. The 96-h LCso of BHC, DDT, Dieldrin and Aldrin were 4.00, 00076, 0.008 and 0.150 mg I-1 for H. fossilis, 2.2, 0.0024, 0.0097 and 0.0185 mg I-1 for C. carpio and 4.6. 0.049. 0.Q18 and 0.024 mg 1-1 for C. punctatus, respectively. BHC was found to be the least and DDT the most toxic of the pesticides tested.