Table 2 Characteristics of larval habitats and mean densities per ten dips of anopheline larvae
From: Study on the species composition and ecology of anophelines in Addis Zemen, South Gondar, Ethiopia
Habitat characteristics | No. of habitats analysed | An. gambiae (s.l.) Mean ± SD (95% CI) | An. cinereus Mean ± SD (95% CI) |
|---|---|---|---|
Permanence | |||
 Permanent | 23 | 5.5 ± 2.5 | 32.3 ± 5.5 |
 Semi-permanent | 21 | 0.7 ± 0 .4 | 30.5 ± 4.5 |
 Temporary | 29 | 22.2 ± 3.2 | 4.5 ± 1.3 |
Turbidity | |||
 Clear | 71 | 10.5 ± 1.9 | 21.3 ± 2.7 |
 Turbid | 2 | 19.5 ± 4.5 | 0 |
Distance from house | |||
 0–100 m | 47 | 10.9 ± 2.5 | 24.6 ± 3.7 |
 100–300 m | 15 | 11.4 ± 3.3 | 9.9 ± 3.4 |
  ≥ 300 m | 11 | 9.1 ± 4.7 | 19.2 ± 5.5 |
Origin of habitat | |||
 Natural | 38 | 13.4 ± 2.8 | 16.8 ± 3.9 |
 Man made | 35 | 7.8 ± 2.3 | 25.0 ± 3.7 |
Presence of aquatic vegetation | |||
 None | 54 | 10.5 ± 2.3 | 21.7 ± 3.2 |
 Emergent | 7 | 9.1 ± 5.2 | 20.3 ± 9.6 |
 Floating | 9 | 16.2 ± 4.5 | 8.6 ± 3.9 |
 Emergent and floating | 3 | 2.0 ± 2.0 | 41 ± 10.2 |
Presence of algae | |||
 Present | 60 | 6.9 ± 1.7 | 25.2 ± 3.0 |
 Absent | 13 | 28.5 ± 4.1 | 0.3 ± 0.2 |
Type of substrate | |||
 Muddy | 5 | 29.2 ± 9.2 | 0 |
 Sand and stone gravel with little soil | 63 | 9.2 ± 1.9 | 23.1 ± 3.0 |
 Stone and soil | 3 | 7.0 ± 7.0 | 9.3 ± 5.6 |
 Stone | 2 | 18.0 ± 17.0 | 16.5 ± 11.5 |
Water current | |||
 Slow flowing | 25 | 5.3 ± 2.3 | 31.1 ± 15.4 |
 Still | 48 | 13.5 ± 2.5 | 15.4 ± 2.8 |