Table 3.
Comparison of physico–chemical characteristics between sites with and without anopheline larvae
| Parameter | With anopheline larvae | Without anopheline larvae | t-test | P-value | ||
|---|---|---|---|---|---|---|
| N | Means ± SE | N | Means ± SE | |||
| pH | 227 | 8.0 ± 0.1 | 286 | 7.8 ± 0.1 | 1.6 | 0.2 |
| TDS (mg/L) | 240 | 96.2 ± 16.8 | 300 | 93.9 ± 9.6 | 0.6 | 0.4 |
| Conductivity (μs/cm) | 240 | 449.0 ± 29.8 | 300 | 382.9 ± 14.6 | 3.9 | 0.05 |
| Turbidity (FTU) | 240 | 380.9 ± 103.8 | 300 | 146.0 ± 18.7 | 10.5 | 0.001 |
| Calcium (mg/L) | 240 | 53.7 ± 21.7 | 300 | 129.7 ± 85.6 | 2 | 0.16 |
| Iron LR | 108 | 0.7 ± 0.1 | 118 | 0.7 ± 0.1 | 0 | 0.98 |
| Organophosphates (mg/L) | 138 | 13.3 ± 4.2 | 158 | 9.0 ± 0.8 | 3.5 | 0.06 |
| Aluminium (mg/L) | 240 | 0.3 ± 0.1 | 300 | 0.2 ± 0.1 | 0.2 | 0.7 |
| Sulfate | 240 | 42.2 ± 3.9 | 300 | 36.8 ± 3.3 | 0.9 | 0.3 |
| H2O2 (mg/L) | 240 | 3.8 ± 1.0 | 300 | 1.1 ± 0.2 | 27.4 | 0.002 |
| Temperature (°C) | 240 | 28.2 ± 0.2 | 300 | 27.4 ± 0.2 | 1.5 | 0.001 |
N Number, SE Standard error, FTU Formazine turbidity unit, TDS Total disolved solids, LR Light rigid