Table 1 The proportion of occurrence and average number of Anopheles arabiensis breeding sites in sentinel grid cells across different ecological zones in La Reunion Island from 1996 to 2009.
Studied zone | Sampling period | Numbers of grids sampled | Number of positive grid cells (%) | Total number of breeding sites | Mean (M) number of breeding sites (SEM) | Observed maximum number | Variance (V) | Dispersion (V/M) |
|---|---|---|---|---|---|---|---|---|
NORTHEAST | 1997 | 1972 | 136 (6.90) | 99 | 1.37 (0.07) | 6 | 0.60 | 0.44 |
2003 | 2129 | 305 (14.33) | 109 | 2.80 (0.30) | 17 | 10.34 | 3.69 | |
2009 | 2317 | 558 (24.08) | 176 | 3.17 (0.32) | 27 | 18.32 | 5.78 | |
SOUTH | 1997 | 1470 | 34 (2.31) | 26 | 1.31 (0.12) | 3 | 0.38 | 0.29 |
2003 | 1552 | 150 (9.66) | 60 | 2.50 (0.22) | 10 | 3.13 | 1.25 | |
2009 | 1616 | 256 (15.84) | 102 | 2.51 (0.28) | 16 | 8.11 | 3.23 | |
WEST | 1997 | 1164 | 285 (24.48) | 100 | 2.85 (0.26) | 16 | 7.01 | 2.46 |
2003 | 1003 | 52 (5.18) | 31 | 1.68 (0.17) | 4 | 0.95 | 0.57 | |
2009 | 1185 | 246 (20.76) | 40 | 6.15 (1.84) | 67 | 136.02 | 22.11 |