Owen Robin E
Department of Genetics and Human Variation, La Trobe University, 3083, Bundoora, Victoria, Australia.
Oecologia. 1983 Sep;59(2-3):402-404. doi: 10.1007/BF00378869.
Sex ratios of offspring in forty-one broods of Asobara persimilis (an hymenopteran parasitoid of Drosophila) were analysed. A single female wasp was introduced per tube of Drosophila larvae so that local mate competition would be expected to occur amongst their offspring. The parental population had a sex ratio of 1:1 (87F:102M), the offspring sex ratio was 787F:296M (2.66:1) highly female biased and not significantly different from 3:1 (P>0.05). The sex ratio was approximately constant regardless of the total brood size which ranged from 5 to 100 (mean 26.2). Females were therefore able to adjust their offspring sex ratios in the predicted direction and the number of males in each brood was determined binomially.
对41窝拟无脉姬小蜂（果蝇的一种膜翅目寄生蜂）后代的性别比例进行了分析。每管果蝇幼虫中放入一只雌蜂，因此预计其后代中会发生局部配偶竞争。亲代群体的性别比例为1:1（87只雌性:102只雄性），后代性别比例为787只雌性:296只雄性（2.66:1），高度偏向雌性，且与3:1无显著差异（P>0.05）。无论总窝大小在5至100之间（平均为26.2），性别比例大致恒定。因此，雌性能够按照预测的方向调整其后代的性别比例，并且每窝中雄性的数量由二项式确定。
