The evolution of infanticide by males in mammalian societies

@article{Lukas2014TheEO,
  title={The evolution of infanticide by males in mammalian societies},
  author={Dieter Lukas and Elise Huchard},
  journal={Science},
  year={2014},
  volume={346},
  pages={841 - 844}
}
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… Expand
The evolution of infanticide by females in mammals
  • D. Lukas, E. Huchard
  • Medicine, Biology
  • Philosophical Transactions of the Royal Society B
  • 2019
TLDR
The findings suggest that the potential direct fitness rewards of gaining access to reproductive resources have a stronger influence on the expression of female aggression than the indirect fitness costs of competing against kin. Expand
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Evidence is provided that female sociality in mammals can have negative fitness consequences that are imposed by male behavior, and this study provides evidence thatfemale sociality can negatively affect offspring survival by increasing the likelihood of infanticide. Expand
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The findings suggest that the potential direct fitness rewards of gaining access to reproductive resources have a stronger influence on the expression of female aggression than the indirect fitness costs of competing against kin. Expand
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An emerging picture is of complex, antagonistic circuits competing for behavioural expression, which allow for males to commit infanticide when they may benefit from such activity but ensure that they do not damage their fitness by killing their own young. Expand
Intersexual conflict influences female reproductive success in a female-dispersing primate
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It is found that females are faced with the dilemma of staying with a silverback at the end of his tenure and risk higher infant mortality versus dispersing and suffering reproductive delays and lower birth rates, showing that female reproductive strategies, namely dispersal, used to counter the effects of sexual coercion by males are not sufficient to overcome the negative consequences of male behavior. Expand
Infanticide by females is a leading source of juvenile mortality in a large social carnivore
TLDR
Of four hypotheses regarding the evolution of infanticide, the most support is found for the hypothesis thatinfanticide in spotted hyenas reflects competition over social status among matrilines. Expand
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