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
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* |