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Table 2 Summary of major abiotic and biotic characteristics associated with two different type of aquatic habitats with An. arabiensis immatures in Bras-Panon and Saint-Benoît, North-east of La Reunion

From: Abiotic and biotic factors associated with the presence of Anopheles arabiensis immatures and their abundance in naturally occurring and man-made aquatic habitats

  Bras-Panon Saint Benoît p-value
Type of breeding site Man-made Rock pools  
Number of habitats 12 11 =
Total number of samples taken 82 105 0.002**
Abiotic factors
Mean surface area (m2) 8.8 [5.04–12.5] 3.6 [2.5–4.6] < 0.001**
Depth (cm) 7.1 [6.3–7.8] 12.1 [11.2–12.9] < 0.001**
Temperature (°C) 33.2 [33.1–34.3] 32.2 [31.8–33.0] 0.02**
pH 8.5 [8.4–8.7] 7.8 [7.6–8.0] < 0.001**
Conductivity (μS/cm) 206.3 [185.5–227] 28.9 [26.4–31.4] < 0.001**
Turbidity 31% 7%  
Biotic characteristics
Mosquito species detected An arabiensis An. arabiensis, Culex neavei N/a
Total number of larvae 320 432  
Mean larval density per dip 0.55 [0.37–0.73] 0.70 [0.57–0.83] 0.03**
Macro-fauna species (diversity index) 14 (1.9) 15 (1.8) 0.45**
Algae (% occurrence)
Absent 29% 62%
Low 48% 32%
Medium 21% 5%
Average surface coverage (%) 12.5% 6% 0.001*
Floating and emergent vegetation
Absent 62% 57%
Low 32% 43%
Medium 6%
Average surface coverage (%) 9% 3% 0.031*
  1. Mean and [95% Confident interval] for each parameter are provided.
  2. * Pearson’s chi square test. ** GLM F-test with all analyses performed after log10 transformation.
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