Vol. 1, Issue 2, Part D (2015)

Abstract
Pesticides are the biological toxicants, which are being used by the man to kill the pests for increasing the yield of many crops and insect vectors to control the spread of disease. Pesticides cause several ill effects to aquatic ecosystem and organisms including fish. The experimental fish, Mustus vitatus were exposed to five acute concentrations (0.00ml/L, 0.020ml/L, 0.040ml/L, 0.060ml/L, 0.080ml/L and 0.10ml/L) and the 96 h LC₅₀ was found to be 0.044 ml/L. Furthermore, the exposed fish showed behavioural changes include hyperactivity, loss of equilibrium, rapid swimming, disturbed opercular movements, increased surface activity and loss of equilibrium. The result also revealed that mortality rate depends upon concentrations of Cypermethrin and duration of exposure.