The evolution of male infanticide in relation to sexual selection in mammalian carnivores

作者: Tomohiro Harano , Nobuyuki Kutsukake

DOI: 10.1007/S10682-017-9925-0

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摘要: The evolution of infanticide by males has often been explained the sexual selection hypothesis, which posits that improves male reproductive success shortening interbirth intervals mothers killed offspring. In Carnivora, however, fitness advantages assumed in this hypothesis have shown only a few species, and it argued may be nonadaptive pinniped carnivores. According to is expected more prevalent species are subjected stronger through intrasexual competition over mates. We examined phylogenetically corrected relationship between size dimorphism (SSD) as measure intensity Our analyses failed detect significant association occurrence SSD across carnivores, although they showed that, among fissipeds (typically terrestrial carnivores), with male-biased significantly likely commit infanticide. This suggests correlated intense fissipeds. pinnipeds (Odobenidae, Otariidae, Phocidae), there was no SSD. Assuming represents on males, result consistent argument not sexually selected behaviour.

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