Fig. 2
From: Microbiota-mediated competition between Drosophila species
Oviposition avoidance of D. suzukii females for egg-laying site previously exposed to D. melanogaster. Values significantly below 0.5 indicate D. suzukii preference for sites unexposed to D. melanogaster. Repeated tests of the same females (a) showed plastic avoidance loss. D. suzukii populations from different geographical origins (n = 9 D. suzukii cages) and (b) exhibited variable avoidance (n = 14, 57, 27, and 16 D. suzukii individuals, from left to right). (c) D. melanogaster males, like females, induce repellency (n = 16 and 21 D. suzukii individuals to test the effects of D. melanogaster females and males, respectively). (d) Trap-captured, wild D. melanogaster flies (F0 in d) induced repellency; however, this property was not induced by laboratory-reared offspring from wild-caught flies (F1 in d) nor by D. simulans (n = 17, 16, 23, and 19 D. suzukii individuals, from left to right). (e) Trap-captured, wild D. suzukii females did not avoid oviposition on D. melanogaster exposed substrates (n = 19, 12, and 8 D. suzukii individuals, from left to right). Symbols indicate means and error-bars standard errors. Significant deviation from equal number of eggs on sites exposed to D. melanogaster, or control sites, were produced by one-tailed Wilcoxon signed rank tests; * for p < 0.05; ** for p < 0.01; *** for p < 0.001