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Table 3 Comparison of physico–chemical characteristics between sites with and without anopheline larvae

From: Spatial distribution of Anopheles gambiae sensu lato larvae in the urban environment of Yaoundé, Cameroon

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
  1. N Number, SE Standard error, FTU Formazine turbidity unit, TDS Total disolved solids, LR Light rigid