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Evolutionary trade-off between secondary sexual traits and ejaculates


Simmons, Leigh W; Lüpold, Stefan; Fitzpatrick, John L (2017). Evolutionary trade-off between secondary sexual traits and ejaculates. Trends in Ecology & Evolution, 32(12):964-976.

Abstract

Recent theoretical models predict that the evolutionary diversification of the weapons and ornaments of pre-mating sexual selection should be influenced by trade-offs with male expenditure on ejaculates. However, the patterns of association between secondary sexual traits and ejaculate expenditure are frequently inconsistent in their support of this prediction. We show why consideration of additional life-history, ecological, and mating-system variables is crucial for the interpretation of associations between secondary sexual traits and ejaculate production. Incorporation of these ‘missing variables’ provides evidence that interactions between pre- and post-mating sexual selection can underlie broad patterns of diversification in male weapons and ornaments. We call for more experimental and genetic approaches to uncover trade-offs, as well as for studies that consider the costs of mate-searching.

Abstract

Recent theoretical models predict that the evolutionary diversification of the weapons and ornaments of pre-mating sexual selection should be influenced by trade-offs with male expenditure on ejaculates. However, the patterns of association between secondary sexual traits and ejaculate expenditure are frequently inconsistent in their support of this prediction. We show why consideration of additional life-history, ecological, and mating-system variables is crucial for the interpretation of associations between secondary sexual traits and ejaculate production. Incorporation of these ‘missing variables’ provides evidence that interactions between pre- and post-mating sexual selection can underlie broad patterns of diversification in male weapons and ornaments. We call for more experimental and genetic approaches to uncover trade-offs, as well as for studies that consider the costs of mate-searching.

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Additional indexing

Item Type:Journal Article, refereed, further contribution
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:testis size, sperm competition, male contest competition, life-history, trade-off
Language:English
Date:December 2017
Deposited On:27 Dec 2017 14:37
Last Modified:19 Feb 2018 09:27
Publisher:Elsevier
ISSN:0169-5347
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.tree.2017.09.011
Related URLs: (Publisher)
PubMed ID:29050795

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