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Experimental sexual selection affects the evolution of physiological and life‐history traits

Garlovsky, Martin D.; Holman, Luke; Brooks, Andrew L.; Novicic, Zorana K.; Snook, Rhonda R.


Martin D. Garlovsky

Andrew L. Brooks

Zorana K. Novicic

Rhonda R. Snook


Sexual selection and sexual conflict are expected to affect all aspects of the phenotype, not only traits that are directly involved in reproduction. Here, we show coordinated evolution of multiple physiological and life-history traits in response to long-term experimental manipulation of the mating system in populations of Drosophila pseudoobscura. Development time was extended under polyandry relative to monogamy in both sexes, potentially due to higher investment in traits linked to sexual selection and sexual conflict. Individuals (especially males) evolving under polyandry had higher metabolic rates and locomotor activity than those evolving under monogamy. Polyandry individuals also invested more in metabolites associated with increased endurance capacity and efficient energy metabolism and regulation, namely lipids and glycogen. Finally, polyandry males were less desiccation- and starvation resistant than monogamy males, suggesting trade-offs between resistance and sexually selected traits. Our results provide experimental evidence that mating systems can impose selection that influences the evolution of non-sexual phenotypes such as development, activity, metabolism and nutrient homeostasis.

Journal Article Type Article
Acceptance Date Mar 9, 2022
Online Publication Date Apr 5, 2022
Publication Date 2022-05
Deposit Date Apr 25, 2022
Publicly Available Date Apr 25, 2022
Journal Journal of Evolutionary Biology
Print ISSN 1010-061X
Electronic ISSN 1420-9101
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 35
Issue 5
Pages 742-751
Keywords experimental evolution, life-history evolution, metabolism, physiology, polyandry, sexual selection, trade-offs
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