Male Mating Competitiveness

Results of mating competition experiments. For each individual mating trial the block and replicate are identified. The competitor treatment (HMC and NMC) is used to identify which selective treatment was in competition with the UA line. A “1” score in the Competitor Mate Column indicates that either the NMC or HMC males was successful at forming a copula. A “0” score here indicates that a UA male was successful. We additionally, have included which colour dust was used to mark each treatment and the winglength of each male. We used a generalized linear mixed effect model (GLMM) with a binomial distribution to test for the fixed effects of treatment (HMC/NMC), male dust colour (pink/yellow) and male wing length on the whether a population male formed a copula with the U female in competition with U males. We incorporated replicate pair, population, and block into our models as random effects. We used a similar approach to test for the effect of treatment on whether sperm was transferred. A GLMM with a binomial distribution was used to test for the fixed effect of treatment (HMC/NMC) on whether a mating resulted in successful sperm transfer. Replicate pair, population and block were again incorporated as random effects.