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The evolution of sexually selected traits and antagonistic androgen expression in actinopterygiian fishes
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Evolutionary Biology.
2007 (English)In: American Naturalist, ISSN 0003-0147, E-ISSN 1537-5323, Vol. 169, no 1, 142-149 p.Article in journal (Refereed) Published
Abstract [en]

Many sexually selected traits in male fishes are controlled by testosterone. Directional selection for male ornaments could theoretically increase male testosterone levels over evolutionary time-scales, and when genetically correlated, female testosterone levels as well. Because of the negative fitness consequences of high testosterone, it is plausible that female choice for sexually selected traits in males results in decreased female reproductive fitness. I used comparative analysis to examine the association between male peak testosterone expression and sexually selected ornaments. I also tested for genetic correlation between male and female androgen levels. The presence of sexually selected traits in males was significantly correlated with increased peak androgen levels in males as well as females, and female testosterone levels were significantly correlated with male peak testosterone titers, although the slope was only marginally < 1. This suggests that selection to decouple high male and female testosterone levels is either weak or otherwise ineffective.

Place, publisher, year, edition, pages
2007. Vol. 169, no 1, 142-149 p.
Keyword [en]
testosterone, sexual antagonism, genetic correlation, supertree, comparative analysis
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-146971DOI: 10.1086/510103ISI: 000243132100018PubMedID: 17206593OAI: oai:DiVA.org:uu-146971DiVA: diva2:399533
Available from: 2011-02-22 Created: 2011-02-22 Last updated: 2011-02-22Bibliographically approved

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