Figure 1

Frequency distribution of the relative mating success of males from the stud vs dud treatments. Relative mating successes (proportion of mated males from the stud treatment/proportion of mated males from the dud treatment) were calculated separately for each of the 39 replicate mating cages. The vertical dotted line indicates the expectation under equal mating success. The mating success of males from the stud treatment is significantly greater than that of males from the dud treatment (p < 0.0001; see text).