Assessment of acute toxicity of sodium cyanide to a freshwater teleost, Labeo rohita (Ham).

摘要

Acute static renewal bioassays were conducted for 96 h period with sodium cyanide to determine its acute toxicity to a freshwater fish, Labeo rohita. Fishes were exposed to different concentration of sodium cyanide and the LC₅₀ value was found to be 0.32 mg/l. The alterations in behavioral pattern, such as change in the color of skin, hyperactivity, loss of balance, rapid swimming, increased surfacing activity, enhanced rate of opercular activity, as well as prominent rates of convulsions in treated fish were observed with the increasing concentrations of cyanide as compared to the control fish. The results suggested that even at low concentrations, the cyanide may exert toxic effects, markedly modifying their behavioral pattern.