Studies on the acute toxicities of copper, mercury, and cadmium to Danio malabaricus and Puntius ticto

Abstract

Danio malabaricus and Puntius ticto were exposed to Cu, Hg, and Cd under static bio‐assay conditions. The results shows that Cu was more toxic to D., malabaricus than the fishes treated with Hg and Cd. The Hg was more toxic to P. ticto than the fishes treated with Cu and Cd. The 24 h LC 50 value of 0.5 mg/l with Cu. for D. malabaricus and 3.0 rag/l for P. ticto were recorded, while the 24 h LC 50 values with Hg for D, malabaricus was 2 mg/l and 0.38 mg/l for P. ticto. The Cd, at the concentrations tested did not affect till 24 h. The LC 50 values at 96 h with Cd. for D. malabaricus were 25 mg/l and 32 mg/l for P. ticto.