Frequency of female copulations with multiple males and sexual selection
Article Abstract:
The validity of a graphic model showing that female copulation with multiple males is inversely related to the availability of suitable males during mate choice was tested in case studies of common bird species. The model proved valid because engagement in extrapair copulations by female birds seemed to be a function of the phenotypic quality of their mates and the males in the neighborhood. Furthermore, precopulatory sexual selection was based on male secondary sexual characters and reinforced by sexual selection during copulation.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1992
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Patterns of fluctuating asymmetry in sexual ornaments of birds from marginal and central populations
Article Abstract:
A detailed analysis of the morphological data of birds with feather ornaments from central and marginal populations indicates an increased fluctuating asymmetry (FA) in the secondary sexual characters in marginal populations. FA is the lack of ability to cope with environmental and genetic stress. Males with feather ornaments exhibit a greater degree of FA in the marginal populations. FA plays an important part in speciation, while enhanced homozygosity as a result of inbreeding in marginal populations influences FA.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1995
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Foraging advantage of polyandry for female sierra dome spiders (Linyphia litigiosa: linyphiidae) and assessment of alternative direct benefit hypotheses
Article Abstract:
A study was conducted to examine the phenotypic results and benefits of remating for female sierra dome spiders. The study considers female sexual receptivity, fertility data and foraging advantage and focuses on the genetic benefits of multiple paternity as an advantage of such foraging in sexual activity. Results show that remating exhibits an advantage for female foraging success.
Publication Name: The American Naturalist
Subject: Earth sciences
ISSN: 0003-0147
Year: 1993
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