Table 4.
The distribution of early and late instars of Anopheline mosquitoes in man-made habitats (A = ponds, B = water canals) provided with different treatments
| Early instars | Late instars | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Parameter | EMM | 95% CI for EMM | Odds Ratio | 95% CI for Exp (B) | P | EMM | 95% CI for EMM | Odds Ratio | 95% CI for Exp (B) | P |
| A) Ponds | Bti only | 2.376 | 1.926-2.826 | 0.891 | 0.679 - 1.169 | 0.404 | 0.570 | 0.364-0.776 | 0.752 | 0.475-1.192 | 0.225 |
| Fish only | 3.067 | 2.604 - 3.505 | 1.145 | 0.899 - 1.460 | 0.272 | 0.903 | 0.697-1.109 | 1.192 | 0.793-1.791 | 0.398 | |
| Bti -Fish (half) | 1.733 | 1.283-2.183 | 0.650 | 0.486 - 0.869 | 0.004* | 0.485 | 0.279-0.691 | 0.640 | 0.405-1.012 | 0.056* | |
| Fish Once | 2.667 | 2.217-3.117 | 1.000 | 0.786 - 1.272 | 1.000 | 0.964 | 0.757-1.170 | 1.272 | 0.844 - 1.916 | 0.250 | |
| Bti -Fish (full) | 0.867 | 0.417-1.317 | 0.325 | 0.211 - 0.499 | 0.000* | 0.261 | 0.054-0.467 | 0.344 | 0.190 - 0.623 | 0.000* | |
| Control | 2.667 | 2.217-3.117 | 1 | 0.758 | 0.551-0.964 | 1 | |||||
| B) Water canals | Bti only | 0.635 | 0.115-1.156 | 0.186 | 0.120-0.289 | 0.000* | 0.161 | 0.042-0.365 | 0.137 | 0.068-0.278 | 0.000* |
| Fish only | 1.906 | 1.386-2.427 | 0.558 | 0.374-0.832 | 0.004* | 0.547 | 0.344-0.750 | 0.465 | 0.288-0.750 | 0.002* | |
| Bti-Fish | 0.740 | 0.219-1.260 | 0.216 | 0.143-0.327 | 0.000* | 0.125 | 0.078-0.328 | 0.106 | 0.056-0.200 | 0.000* | |
| Control | 3.417 | 2.896-3.937 | 1 | 1.177 | 0.974-1.380 | 1 | |||||
* shows habitats that are significantly different from the control. EMM = estimated marginal mean; CI = confidence interval; N = number of times sampled; P = significance level at 95%