A sex-specific test of selection in utero
A sex-specific test of selection in utero
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DOI：
10.1016/j.jtbi.2008.12.008
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发表时间：
2009-04-07
影响因子：
2
通讯作者：
Anderson, Elizabeth
中科院分区：
文献类型：
--
作者：
Catalano, Ralph A.;Saxton, Katherine;Anderson, Elizabeth
我们发现支持这样一种假设，即活着出生的男性每月生双胞胎的几率的变化预示着活着出生的女性生双胞胎的几率随后会发生相反的变化。这一假说源于一种长期存在的争论，即自然选择保留了一种机制，即处于压力下的人群中的孕妇会自发流产最不可能生育孙子的胎儿。此前对这一论点进行实证检验的尝试几乎完全集中在男性身上。我们通过证明，与自然选择的逻辑一致，母体对环境变化的适应可能对男性和女性的胚胎和胎儿的存活产生影响，从而对文献做出了贡献。(C)2008爱思唯尔有限公司。保留所有权利。
We find support for the hypothesis that changes in the monthly odds of a twin among live-born males predict subsequent and opposite changes in the odds of a twin among live-born females. The hypothesis arises from the long standing argument that natural selection has conserved mechanisms by which pregnant women in stressed populations spontaneously abort fetuses least likely to yield grandchildren. Previous attempts to empirically test this argument focus almost entirely on males. We contribute to the literature by showing that, consistent with the logic of natural selection, maternal adaptations to environmental changes likely have effects on the survival of both male and female conceptuses and fetuses. (C) 2008 Elsevier Ltd. All rights reserved.