Table 1.
Hybrids prevalence in larval and adult samples of Anopheles gambiae s.l. estimated by meta‐analysis. The analysis is based on a systematic review of 99 field studies retrieved from 94 articles published between 1964 and 2013 (see Appendix S2)
| Geographical region | Life stage | |||||||
|---|---|---|---|---|---|---|---|---|
| Larvae | Adults | |||||||
| No. studies | Frequency (95% C.I.) | Cochran Q (df) | I 2 (95% C.I.) | No. studies | Frequency (95% C.I.) | Cochran Q (df) | I 2 (95% C.I.) | |
| Anopheles arabiensis × gambiae (Giles) | ||||||||
| Africa | 21 | 0.02% (0.01%–0.05%) | 5.11NS (19) | 0% (0%–42%) | 65 | 0.02% (0.02%–0.04%) | 62.53NS (59) | 6% (0%–32%) |
| East Africa | 11 | 0.02% (0.01%–0.06%) | 1.91NS (10) | 0% (0%–51%) | 22 | 0.03% (0.01%–0.07%) | 12.83NS (19) | 0% (0%–42%) |
| West Africa | 10 | 0.02% (0.00%–0.06%) | 3.13NS (8) | 0% (0%–54%) | 43 | 0.01% (0.00%–0.02%) | 45.59NS (37) | 19% (0%–46%) |
| Anopheles coluzzii × gambiae s.s. | ||||||||
| West Africa | 4 | 0.39% (0.16%–0.73%) | 2.19NS (3) | 0% (0%–64%) | 57 | 0.44% (0.18%–0.81%) | 356.77*** (39) | 89% (86%–91%) |
| West Africa w/out HHA | 4 | 0.39% (0.16%–0.73%) | 2.19NS (3) | 0% (0%–64%) | 50 | 0.17% (0.06%–0.33%) | 112.57*** (32) | 72% (58%–79%) |
| West Africa w/out HHA and BF | 4 | 0.39% (0.16%–0.73%) | 2.19NS (3) | 0% (0%–64%) | 37 | 0.07% (0.02%–0.14%) | 27.37NS (21) | 23% (0%–54%) |
HHA, high hybridization area, including coastal fringe of Guinea Bissau and Senegambia (estuary of the river Gambia and Casamance in Senegal); BF, Burkina Faso; NS: p > .05; ***: p < .001.