Local adaptation to developmental density does not lead to higher mating success in Drosophila melanogaster

In this study, we investigate the effect of local adaptation to developmental density on male mating success in laboratory populations of Drosophila melanogaster. Mating success is known to be influenced by body condition which can in turn be influenced by local adaptation. We test the hypothesis that males adapted to a given environment have higher mating success when assayed in that environment. We used males selected for adaptation to high larval density and their controls which are reared at low larval density. We grew assay males in low and high densities while the focal females (raised at low larval density) used for the experiment belonged to the common ancestor of selected and control populations. We considered selected males grown at high density and control males grown at low density as “adapted”. Similarly we considered selected males grown at low density and control males grown at high density as “non-adapted”. Selected male belonging to a given treatment (larval density) wa...本研究以实验室饲养的黑腹果蝇（Drosophila melanogaster）种群为研究对象，探究发育密度的局部适应对雄性交配成功率的影响。已知雄性交配成功率受身体状态影响，而身体状态又可受局部适应调控。本研究验证的假说为：适应特定环境的雄性果蝇，在该环境下进行交配检测时，将表现出更高的交配成功率。本研究选取了适应高幼虫密度的雄性果蝇，以及以低幼虫密度饲养的对照雄性果蝇。本研究将供试雄性果蝇分别以低、高幼虫密度饲养，而实验所用的目标雌果蝇（均以低幼虫密度饲养）均来自选育种群与对照种群的共同祖先。我们将在高幼虫密度下饲养的选育雄性，以及在低幼虫密度下饲养的对照雄性，定义为"适应型"个体。同理，将在低幼虫密度下饲养的选育雄性，以及在高幼虫密度下饲养的对照雄性，定义为"非适应型"个体。属于某一处理（幼虫密度）的选育雄性……