Impact of Cypermethrin on Fingerlings of Common Edible Carp (Labeo rohita)
Table 1
Toxicity of cypermethrin against fingerlings of fish Labeo rohita.
Exposure periods
Effective dose (LC values, μg/L)
Limits (μg/L)
Slope value
“” factor
“” ratio
Heterogeneity
LCL
UCL
6 h
(i) LC10 = 0.203
0.173
0.225
0.056
8.27
0.34
(ii) LC50 = 0.323
0.302
0.347
(iii) LC90 = 0.515
0.461
0.610
12 h
(i) LC10 = 0.189
0.166
0.207
0.042
9.52
0.32
(ii) LC50 = 0.278
0.261
0.295
(iii) LC90 = 0.409
0.378
0.457
18 h
(i) LC10 = 0.172
0.152
0.187
0.043
9.46
0.29
(ii) LC50 = 0.240
0.225
0.254
(iii) LC90 = 0.334
0.311
0.367
24 h
(i) LC10 = 0.154
0.136
0.168
0.059
8.05
0.13
(ii) LC50 = 0.205
0.193
0.217
(iii) LC90 = 0.273
0.254
0.301
There was no mortality in control groups. Batches of ten fishes were exposed to different concentrations of cypermethrin. Concentrations given are the final concentrations (w/v) in aquarium water. Regression coefficient showed that there was significant () negative correlation between exposure periods and different LC values. LCL: lower confidence limit; UCL: upper confidence limit.
