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Table 1 Effects of marker size, mosquito sex, number of swarming mosquitoes and number of released mosquitoes on swarm characteristics in An. coluzzii in laboratory setups (design 2)

From: Sex aggregation and species segregation cues in swarming mosquitoes: role of ground visual markers

  Marker sizea Mosquito sex No. of swarming mosquitoes
20 cm 60 cm χ2 df P-value Males Females χ2 df P-value χ2 df P-value
Swarm dimensions (± SE) (cm)
 Maximal 73.0 ± 1.1 139.0 ± 1.3 168.90 1 < 0.001 110.9 ± 7.0 101.0 ± 6.8 0.48 1 0.484 11.87 1 < 0.001
 Nucleus 53.2 ± 0.9 106.8 ± 1.2 134.30 1 < 0.001 84.0 ± 5.8 76.0 ± 5.5 0.0003 1 0.980 2.09 1 0.147
 Minimal 31.1 ± 0.9 64.3 ± 0.9 360.80 1 < 0.001 50.7 ± 3.5 44.7 ± 3.5 2.99 1 0.083 35.89 1 < 0.001
 Amplitude 41.9 ± 0.9 74.7 ± 1.0 74.06 1 < 0.001 60.2 ± 3.7 56.4 ± 3.4 2.59 1 0.107 4.97 1 0.025
 Width 32.0 ± 0.8 52.1 ± 1.8 51.38 1 < 0.001 47.4 ± 2.7 36.7 ± 1.7 6.01 1 0.014 9.07 1 0.002
Swarm sizeb (± SE)
 No. of swarming mosquitoes 19.2 ± 1.9 44.9 ± 6.1 10.65 1 0.001 50.5 ± 5.1 13.7 ± 0.6 76.73 1 < 0.001 na na na
  1. aAn. coluzzii mosquitoes swarmed only in presence of a marker
  2. bSwarm size expressed as the number of swarming mosquitoes
  3. Abbreviations: SE, standard error; na, not included in the analyses
  4. Note: Significant P-values are in bold