Lack of evidence for rare male mating advantage in wild type strains ofDrosophila ananassae

摘要

Experiments were conducted to test the rare male mating advantage in wild type strains of Drosophila ananassae derived from different geographic localities, by employing different experimental designs as well as different marking procedures. Mating success of two types of males was scored by direct observation in Elens-Wattiaux mating chamber at 5 different ratios. The results show that the differences between observed and expected numbers of matings of two types of males at 5 different ratios are not significant in all the experiments. Thus, there is lack of evidence for rare male mating advantage in wild type strains of D. ananassae. Further, there is consistency in the results with different experimental designs as well as different marking procedures, which suggests that different experimental designs and marking procedures have no effect on the results. The comparison of mating frequencies of two types of males shows that both types of males are equally successful in mating and thus have similar mating propensity. Further, there is no evidence for assortative mating as both types of females are equally receptive to two types of males.