highly significantp<0.001
Non-linear regression produced a highly significant negative exponential model (a = 190.250, SE a = 2.862; b = −0.172, SE b = 0.037; F = 32.9, p<0.001), in which distance from the breeding sites explained over 40% of the variance in GM female Anopheles gambiae s.l. trapped in villages ( Figure 3a ; R 2 = 0.417).