Table 2.
Effects of marker size, mosquito sex, number of swarming mosquitoes and number of released mosquitoes on swarm characteristics in An. coluzzii and An. gambiae in semi-field setups
| Marker size | Species | Sex | No. of swarming mosquitoes | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 60 cm | 100 cm | χ2 | df | P-value | An. coluzzii | An. gambiae | χ2 | df | P-value | Female | Male | χ2 | df | P-value | χ2 | df | P-value | |
| Swarm dimension (± SE) (cm) | ||||||||||||||||||
| Maximal | 161.5 ± 4.8 | 181.6 ± 4.9 | 32.19 | 1 | < 0.001 | 176.0 ± 4.2 | 167.2 ± 5.7 | 2.20 | 1 | 0.14 | 177.5 ± 3.1 | 161.8 ± 7.8 | 6.87 | 1 | 0.009 | 0.0047 | 1 | 0.95 |
| Nucleus | 127.4 ± 5.5 | 153.6 ± 4.9 | 70.92 | 1 | < 0.001 | 140.9 ± 4.5 | 140.4 ± 6.4 | 1.92 | 1 | 0.17 | 142.4 ± 3.5 | 137.7 ± 8.6 | 0.07 | 1 | 0.79 | 0.22 | 1 | 0.64 |
| Minimal | 95.9 ± 6.1 | 122.6 ± 5.7 | 31.90 | 1 | < 0.001 | 107.3 ± 5.6 | 111.5 ± 6.8 | 0.14 | 1 | 0.71 | 106.4 ± 4.8 | 114.3 ± 8.4 | 0.38 | 1 | 0.54 | 0.013 | 1 | 0.91 |
| Amplitude | 65.6 ± 44.9 | 58.6 ± 3.8 | 2.81 | 1 | 0.09 | 68.3 ± 4.3 | 57.7 ± 3.9 | 3.40 | 1 | 0.06 | 71.1 ± 3.3 | 46.9 ± 4.5 | 11.46 | 1 | < 0.001 | 0.19 | 1 | 0.67 |
| Width | 45.3 ± 3.3 | 55.2 ± 3.4 | 0.018 | 1 | 0.89 | 51.3 ± 3.2 | 49.3 ± 3.6 | 0.35 | 1 | 0.55 | 49.5 ± 3.2 | 51.5 ± 3.6 | 1.29 | 1 | 0.26 | 5.3 | 1 | 0.021 |
| Swarm sizea (± SE) | ||||||||||||||||||
| No. of swarming mosquitoes | 26.1 ± 2.6 | 42.8 ± 3.9 | 228.75 | 1 | < 0.001 | 43.5 ± 3.7 | 25.3 ± 2.7 | 19.06 | 1 | < 0.001 | 25.3 ± 2.1 | 49.4 ± 4.8 | 22.33 | 1 | < 0.001 | na | na | na |
aSwarm size expressed as the number of swarming mosquitoes
Abbreviations: SE, standard error; na, not included in the analyses
Note: Significant P-values are in bold