Influences of female and male parents on adaptive manipulation of offspring sex ratios

在孔雀鱼中，与漂亮的雄性交配的雌性比与不那么漂亮的雄性交配的雌性产生的后代具有更多的性别偏向。由于雄性孔雀鱼的性吸引力是一种可遗传的特征，这种依赖于雄性吸引力的对后代性别比例的操纵可能是适应性的。为了弄清是女性还是男性父母操纵子女的性别比，进行了一项男性相对吸引力被操纵的检查。这项研究的结果表明，女性父母有责任操纵子女的性别比。

In the guppy Poecilia reticulata, females that mated with attractive males produced offspring with more male-biased sex ratios than those that mated with less attractive males. Since sexual attractiveness of male guppies is a heritable trait, such manipulation of offspring sex ratios depending on male attractiveness may be adaptive. In order to clarify whether female or male parents execute the offspring sex ratio manipulation, an examination in which the relative attractiveness of males was manipulated was conducted. Results of this study indicate that female parents have responsible for offspring sex ratio manipulation.