Determination of Lethal Concentration (LC 50) of Channa Striatus to organophosphate Diazinon

During the present research tenure, 10 percentile of 96 h LC50 of Diazinon concentrations were used against Channa striatus with an average length and weight of 12.5 ± 1.1 to 13.0 ± 1.2 cm and 32.7 ± 1.0 to 43.1 ± 2.3 g, respectively. The calculated LC50 for Diazinon concentrations (LC50 = 24.16 ppm) were tested in Channa striatus in different concentrations. The 50% mortality started in between 25 ppm (LC50) to 30 ppm (LC60), which reveals the calculated LC50 = 24.16 ppm. The mortality of 47.6% was recorded in 96 h LC50 (25 ppm) concentration with expected response of 23.2, residual of 1.8 and probability value of 50.00. ANOVA of the fish mortality and concentration of Diazinon revealed no significant differences (P<0.05), the lower and higher 95% values were observed as -1.0 and 2.7 respectively.