期刊
SCIENCE
卷 346, 期 6211, 页码 841-844出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1257226
关键词
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资金
- European Research Council [294494-THCB2011]
- Natural Environment Research Council [NE/RG53472]
Male mammals often kill conspecific offspring. The benefits of such infanticide to males, and its costs to females, probably vary across mammalian social and mating systems. We used comparative analyses to show that infanticide primarily evolves in social mammals in which reproduction is monopolized by a minority of males. It has not promoted social counterstrategies such as female gregariousness, pair living, or changes in group size and sex ratio, but is successfully prevented by female sexual promiscuity, a paternity dilution strategy. These findings indicate that infanticide is a consequence, rather than a cause, of contrasts in mammalian social systems affecting the intensity of sexual conflict.
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