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Table 2 Types of breeding sites and their mean larval densities in the rainy and dry season according to the level of urbanization of the districts

From: Diversity of larval habitats of Anopheles mosquitoes in urban areas of Benin and influence of their physicochemical and bacteriological characteristics on larval density

Seasons Habitat types Parakou Natitingou Bohicon Cotonou
Urban districts, n (mean larval density/dip) Non-urban districts, n (mean larval density/dip) Urban districts, n (mean larval density/dip) Non-urban districts, n (mean larval density/dip) Urban districts, n (mean larval density/dip) Non-urban districts, n (mean larval density/dip) Urban districts, n (mean larval density/dip) Non-urban districts, n (mean larval density/dip)
Rainy season Gutters 2 (18.5 ± 23.3) 3 (4.3 ± 4.9) 0 1 (5) 5 (11.4 ± 12.0) 1 (1) 0 0
Tyres 5 (1.5 ± 0.8) 9 (1.9 ± 1.6) 5 (2.5 ± 2.1) 0 4 (2.7 ± 1.7) 2 (3.5 ± 2.1) 1 (2) 0
Vegetable farms 0 2 (7 ± 4.2) 0 0 0 0 2 (6.5 ± 4.9) 0
Puddles 2 (1.2 ± 0.3) 7 (4.5 ± 3.5) 10 (3.7 ± 3.1) 4 (5.2 ± 6.5) 17 (3 ± 2.1) 10 (3.4 ± 4.4) 21 (4.3 ± 4.5) 14 (2.5 ± 1.5)
Tyre tracks 3 (12 ± 12.1) 0 2 (6.5 ± 2.1) 3 (6.3 ± 3.0) 0 0 0 3 (4 ± 3.6)
Swamps 1 (3) 0 1 (3) 0 0 0 0 0
Pits 0 0 1 (3) 0 0 0 3 (1.3 ± 0.6) 0
Water containers for animals 0 1 (1) 0 0 0 0 0 0
Hoof imprints 1 (2) 0 0 1(2) 0 0 0 0
Tin can 0 1 (1) 0 0 0 0 0 0
Ponds 6 (7.2 ± 5.3) 0 5 (6.3 ± 8.3) 0 1 (2) 0 0 0
Abandoned cans 0 0 1(4) 0 0 0 0 0
Wells 0 0 1(0.5) 0 0 0 0 0
Construction sites 0 0 0 0 0 0 1 (6) 0
Total 20 (8.7 ± 8.9) 23 (3.4 ± 3.2) 26 (3.9 ± 4.3) 9 (5.2 ± 4.9) 27 (4.5 ± 6.0) 13 (3.3 ± 3.9) 28 (4.1 ± 4.2) 17 (2.8 ± 1.9)
Dry season Gutters 1 (3) 2 (4.5 ± 3.5) 1 (2) 0 2 (4.5 ± 0.7) 2 (4 ± 4.2) 2 (2 ± 1.4) 0
Tyres 1 (5) 0 0 0 1(2) 0 1(0.5) 0
Vegetable farms 0 0 2 (4 ± 4.2) 0 1 (5) 0 2 (2.5 ± 0.7) 0
Puddles 0 2 (2.5 ± 2.1) 2 (1.5 ± 0.70) 0 1(0.1) 0 0 1(2)
Tyre tracks 0 1 (2) 0 0 0 0 0 1(2)
Hollow bricks 0 0 0 0 0 0 0 1(0.5)
Flowerpots 0 0 0 0 0 0 1(1) 0
Under bridges 0 2 (3.5 ± 3.5) 0 0 1 (2) 0 0 0
Swamps 0 0 0 0 0 0 0 2 (1 ± 0)
Pits 1 (0.5) 0 0 0 0 0 0 1 (7)
Total 3 (2.8 ± 2.2) 7 (3.3 ± 2.4) 5 (2.6 ± 2.1) 0 6 (3.0 ± 1.9) 2 (4 ± 4.2) 6 (1.7 ± 1.1) 6 (2.3 ± 2.4)
P-value   0.2667 0.9399 0.5180 0.5535 0.8180 0.1789 0.1347