Evolutionary Ecology

, Volume 2, Issue 4, pp 338–352

The potential for sexual selection in males: Effect of sex ratio and spatiotemporal distribution of receptive females

  • Rolf Anker Ims
Papers

DOI: 10.1007/BF02207565

Cite this article as:
Ims, R.A. Evol Ecol (1988) 2: 338. doi:10.1007/BF02207565

Summary

An animal mating system characterized by male-male competition and active searching for sexually receptive females was modelled to study how varying sex ratio and spatiotemporal distribution of receptive females can affect the variance in male mating success (i. e. potential for sexual selection) in males. The temporal distribution of female receptivity periods appeared to be the variable that had the most pronounced effect on the potential for sexual selection in males. The potential for sexual selection increased monotonically as the degree of asynchrony of female reproduction increased. Female spatial distribution and sex ratio were important only when female reproduction was asynchronous. Then, the potential for sexual selection in males was at its peak when females were overdispersed in space and the sex ratio was female biased. Some of the results derived from the model analysis contrast with predictions from previous studies. The deviating results are most likely caused by different assumptions about modes of mate acquisition in males.

Keywords

Sexual selection mating success overlap promiscuity competitive ability spatiotemporal breeding pattern sex ratio mate detection probability 

Copyright information

© Chapman and Hall Ltd. 1988

Authors and Affiliations

  • Rolf Anker Ims
    • 1
  1. 1.Department of Biology, Division for ZoologyUniversity of OsloOslo 3Norway

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