NATURAL-SELECTION OF PARENTAL ABILITY TO VARY SEX-RATIO OF OFFSPRING
NATURAL-SELECTION OF PARENTAL ABILITY TO VARY SEX-RATIO OF OFFSPRING
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DOI：
10.1126/science.179.4068.90
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发表时间：
1973-01-01
期刊：
影响因子：
56.9
通讯作者：
WILLARD, DE
中科院分区：
文献类型：
--
作者：
TRIVERS, RL;WILLARD, DE
理论和数据表明，在父母投资期结束时，一个状况良好的男性预计将超过一个状况相似的姐妹，而她预计将超过他，如果两人都处于贫困状态。因此，自然选择应该有利于父母根据父母的投资能力调整后代性别比例的能力。来自哺乳动物的数据支持这一模型：随着母体条件的下降，成年雌性倾向于产生较低的雄性与雌性比例。
Theory and data suggest that a male in good condition at the end of the period of parental investment is expected to outreproduce a sister in similar condition, while she is expected to outreproduce him if both are in poor condition. Accordingly, natural selection should favor parental ability to adjust the sex ratio of offspring produced according to parental ability to invest. Data from mammals support the model: As maternal condition declines, the adult female tends to produce a lower ratio of males to females.