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Indirect genetic benefits of polyandry in a spider with direct costs of mating
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
2006 (English)In: Behavioral Ecology and Sociobiology, ISSN 0340-5443, E-ISSN 1432-0762, Vol. 61, no 1, 31-38 p.Article in journal (Refereed) Published
Abstract [en]

The search for the evolutionary explanation of polyandry is increasingly focused on direct and indirect selection on female resistance. In a polyandrous spider Stegodyphus lineatus, males do not provide material benefits and females are resistant to remating. Nevertheless, polyandrous females may obtain indirect genetic benefits that offset the costs associated with multiple mating. We manipulated the opportunity for females to select between different partners and examined the effect of female mating history (mated once, mated twice, or rejected the second male) on offspring body mass, size, condition, and survival under high- and low-food rearing regimens. We found that multiple mating, not female choice, results in increased female offspring body mass and condition. However, these effects were present only in low-food regimen. We did not find any effects of female mating history on male offspring variables. Thus, the benefits of polyandry depend not only on sex, but also on offspring environment. Furthermore, the observed patterns suggest that indirect genetic benefits cannot explain the evolution of female resistance in this system.

Place, publisher, year, edition, pages
2006. Vol. 61, no 1, 31-38 p.
Keyword [en]
indirect selection, female resistance, mate choice, sexual selection, sexual conflict, Stegodyphus lineatus
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-154424DOI: 10.1007/s00265-006-0234-9ISI: 000241105100004OAI: oai:DiVA.org:uu-154424DiVA: diva2:420365
Available from: 2011-06-01 Created: 2011-06-01 Last updated: 2011-06-01Bibliographically approved

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