Table 3 Effects of marker size, number of swarming mosquitoes and number of released mosquitoes on swarm characteristics in An. gambiae in laboratory setups (design 2)
From: Sex aggregation and species segregation cues in swarming mosquitoes: role of ground visual markers
Marker size | Number of swarming mosquitoes | Number of released mosquitoes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø | 20 cm | 60 cm | χ2 | df | P-value | χ2 | df | P-value | χ2 | df | P-value | ||
Males | Swarm dimensions (± SE) (cm) | ||||||||||||
Maximal | 72.1 ± 1.1 | 76.9 ± 1.6 | 75.0 ± 1.3 | 4.97 | 2 | 0.083 | 9.72 | 1 | 0.001 | na | na | na | |
Nucleus | 50.9 ± 1.0 | 52.5 ± 1.4 | 51.5 ± 1.2 | 1.56 | 2 | 0.462 | 3.29 | 1 | 0.072 | na | na | na | |
Minimal | 31.8 ± 1.1 | 33.3 ± 1.5 | 31.5 ± 1.4 | 0.88 | 2 | 0.641 | 10.84 | 1 | < 0.001 | na | na | na | |
Amplitude | 40.3 ± 1.6 | 43.5 ± 2.4 | 43.5 ± 2.0 | 3.81 | 2 | 0.148 | 23.09 | 1 | < 0.001 | na | na | na | |
Width | 29.1 ± 0.9b | 34.4 ± 1.6c | 39.8 ± 1.2d | 25.87 | 2 | < 0.001 | 11.95 | 1 | < 0.001 | na | na | na | |
Swarm sizea (± SE) | |||||||||||||
No. of swarming mosquitoes | 21.5 ± 1.3b | 27.1 ± 2.2c | 32.3 ± 2.3d | 27.14 | 2 | < 0.001 | na | na | na | 21.19 | 1 | < 0.001 | |
Females | Swarm dimensions (± SE) (cm) | ||||||||||||
Height | 43.4 ± 1.1b | 52.7 ± 1.4c | 51.8 ± 1.1c | 91.04 | 2 | < 0.001 | 5.56 | 1 | 0.018 | na | na | na | |
Swarm size (± SE) | |||||||||||||
No. of swarming mosquitoes | 3.7 ± 0.5 b | 7.0 ± 1.4c | 9.6 ± 1.6c | 44.12 | 2 | < 0.001 | na | na | na | 0.02 | 1 | 0.871 | |
Swarming frequency (no./5min ± SE) | |||||||||||||
Frequency | 9.3 ± 0.3b | 15.0 ± 0.3c | 15.5 ± 0.3c | 105.83 | 2 | < 0.001 | na | na | na | 0.22 | 1 | 0.632 | |