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Ornaments or offspring: costs to reproductive success restrict sexual selection processes
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
1995 (English)In: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 55, no 3, 251-260 p.Article in journal (Refereed) Published
Abstract [en]

If, in their partner choice, males seek direct benefits (fecund females), the result will be selection for traits indicating female quality rather than for arbitrary (Fisherian) traits. However, the costs of developing and maintaining the sexually selected traits (ornaments) may reduce the resources available to the female for allocation to reproduction and hence result in lower reproductive success per brood. This hitherto unrecognized fecundity cost of sexually selected traits will constrain both the potency of sexual selection mechanisms and the degree of elaboration of sexually selected traits in females, and can also apply to males which invest in their offspring: sexual selection becomes self-limiting. The fitness implications of these costs are examined for both sexes in a variety of mating and parental care patterns. Sexual selection acting on both sexes may lead to either dimorphism or monomorphism, the latter being the case when the quality indicators chosen by both sexes coincide. Ways of evasion or reduction of these reproductive costs of allocations to sexually selected traits include using different resource components for the ornament and for reproduction, or partitioning the two allocations in time. (C) 1995 The Linnean Society of London

Place, publisher, year, edition, pages
1995. Vol. 55, no 3, 251-260 p.
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-126457ISI: A1995RJ81900005OAI: oai:DiVA.org:uu-126457DiVA: diva2:324112
Available from: 2010-06-14 Created: 2010-06-14 Last updated: 2010-08-09Bibliographically approved

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