On the Evolution of Mating Systems in Birds and Mammals

@article{Orians1969OnTE,
  title={On the Evolution of Mating Systems in Birds and Mammals},
  author={Gordon H. Orians},
  journal={The American Naturalist},
  year={1969},
  volume={103},
  pages={589 - 603}
}
  • G. Orians
  • Published 1969
  • Biology
  • The American Naturalist
Predictions from a theory assuming mate selection on the part of females, which maximizes reproductive success of individuals, are found to accord closely, though not completely, with known mating patterns. These predictions are that (1) polyandry should be rare, (2) polygyny should be more common among mammals than among birds, (3) polygyny should be more prevalent among precocial than among altricial birds, (4) conditions for polygyny should be met in marshes more regularly than among… Expand
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It is pointed out that if sexual selection results in sexual dimorphism expressed during the period of parental care, there may be a change in average expenditure per sex with a consequent change in sex ratio, and mate preference, which in my opinion should have a profound influence on the mating system, may also have an effect on the sex ratio. Expand
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Regardless of sex ratio, a polygynous mating is expected to be adaptive for the females as well as for the male, and marshes and prairies are more likely than forests to present the minimum requisite food supply and sufficiently great differences in available food between territories for selection to favor polygyny. Expand
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I.IF Mr. Darwin had closed his rich series of contributions to Science by the publication of the “Origin of Species,“he would have made an epoch in Natural History like that which Socrates made inExpand
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