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Table 2 Key parameters measured in the 327 sites that contained water, Dar es Salaam, Tanzania.

From: Habitat characterization and spatial distribution of Anopheles sp. mosquito larvae in Dar es Salaam (Tanzania) during an extended dry period

Characteristics # % Characteristics # %
Type of breeding site:    Filamentous algae present 138 42.2
Stream 2 0.6    
Large drain 29 8.9 Single-celled algae present 18 5.5
Small drain 16 4.9    
Swamp 92 28.1 Predators present 118 36.1
Rock pool 0 0    
Puddle 22 6.7 Shade   
Foot/hoof print 4 1.2 0–25% 250 76.5
Tyretrack 1 0.3 26–50% 58 17.7
Artificial hole 82 25.1 51–75% 16 4.9
Concrete hole 9 2.8 75–100% 3 0.9
Artificial container 0 0    
Other 69 21.4 Maximum depth more than 0.5 m 108 32.7
General surrounding    Size   
High density housing 236 71.6 Perimeter < 1m 17 5.2
Fields 57 18.0 Perimeter 1–10 m 128 39.4
Industry 19 5.8 Perimeter > 10 m 182 55.4
Other 15 4.6    
    Turbidity   
Distance to nearest inhabited house    Clear 137 41.9
<10 m 179 54.7 Turbid 160 48.9
10–100 m 127 38.8 Very turbid 30 9.2
>100 m 21 6.4    
    Salinity mS/cm (rounded to full numbers)   
Distance to nearest potential resting site    0–1 138 42.3
<10 m 327 100 2–3 145 44.5
10–100 m 0 0 4–5 22 6.7
>100 m 0 0 6–7 4 1.2
    8–9 3 0.9
Anopheles larvae density    10–14 4 1.2
Absent 125 38.2 15–19 2 0.6
Low density 64 19.3 >20 8 2.5
High density 138 42.5    
    Temperature °C (rounded to full numbers)   
Culicine larvae density    25–26 9 2.8
Absent 139 43.1 27–28 34 10.4
Low density 43 13.1 29–30 92 28.2
High density 145 43.7 31–32 71 21.7
    33–34 63 19.3
Anopheles and Culicine pupae density    35–36 39 12.0
Absent 247 75.5 37–38 12 3.7
Low density 37 11.3 39–40 5 1.5
High density 43 13.1    
    pH (rounded to full numbers)   
Grass in the middle of site present 134 41.0 6 3 0.9
    7 111 34.1
Grass along the edges present 244 74.6 8 169 52.0
    9 46 12.3
Floating plants present 65 19.9 10 2 0.6
Floating algae present 41 12.5