Figure 1.

Effect of bacterial infections on male courtship behaviour. (a,h) Male CS flies were injected with three non-pathogenic (a) and pathogenic (h) strains and tested in a single pair courtship assay with an uninfected virgin female. (b) Courtship index and (e) mating success of males infected with ECC15 and their respective controls (n = 31–32). (c) Courtship index and (f) mating success of males infected with E. coli and their respective controls (n = 22–31). (d) Courtship index and (g) mating success of males infected with M. luteus and their respective controls (n = 21–22). (i) Courtship index and (l) mating success of males infected with S. marcescens and their respective controls (n = 29–30). (j) Courtship index and (m) mating success of males infected with S. aureus and their respective controls (n = 17–21). (k) Courtship index and (n) mating success of males infected with L. monocytogenes and their respective controls (n = 20–23). Dunn's test in (b–d), (i–k) and Fisher's test in (e–g), (l–n). Courtship indices and mating success are presented as percentage. A detailed description of the statistics employed can be found in the electronic supplementary material. (Online version in colour.)