Resource-dependent evolution of female resistance responses to sexual conflict

Rostant, Wayne G, Mason, Janet S, de Coriolis, Jean-Charles and Chapman, Tracey (2020) Resource-dependent evolution of female resistance responses to sexual conflict. Evolution Letters, 4 (1). pp. 54-64. ISSN 2056-3744

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Abstract

Sexual conflict can promote the evolution of dramatic reproductive adaptations as well as resistance to its potentially costly effects. Theory predicts that responses to sexual conflict will vary significantly with resource levels-when scant, responses should be constrained by trade-offs, when abundant, they should not. However, this can be difficult to test because the evolutionary interests of the sexes align upon short-term exposure to novel environments, swamping any selection due to sexual conflict. What is needed are investigations of populations that are well adapted to both differing levels of sexual conflict and resources. Here, we used this approach in a long-term experimental evolution study to track the evolution of female resistance to sexual conflict in the fruit fly Drosophila melanogaster. In resource-rich regimes, high-conflict females evolved resistance to continual exposure to males. There was no difference in baseline survival, consistent with the idea that responses evolving under nutritional abundance experienced no trade-offs with resistance. In the poor resource regimes, the ability of high-conflict females to evolve resistance to males was severely compromised and they also showed lower baseline survival than low-conflict females. This suggested high-conflict females traded off somatic maintenance against any limited resistance they had evolved in response to sexual conflict. Overall, these findings provide experimental support for the hypothesis that evolutionary responses to sexual conflict are critically dependent upon resource levels.

Item Type: Article
Additional Information: © 2020 The Authors. Evolution Letters published by Wiley Periodicals, Inc. on behalf of Society for the Study of Evolution (SSE) and European Society for Evolutionary Biology (ESEB).
Uncontrolled Keywords: antagonistic coevolution,costs,drosophila-melanogaster,diet manipulation,fitness,life-span,male harm,population,reproduction,selection,trade-off,experimental evolution,lifespan,maintenance,resistance to harm,sexual conflict,trade-off
Faculty \ School: Faculty of Science > School of Biological Sciences
Faculty of Science
Depositing User: LivePure Connector
Date Deposited: 03 Mar 2020 09:11
Last Modified: 31 Jul 2020 23:48
URI: https://ueaeprints.uea.ac.uk/id/eprint/74408
DOI: 10.1002/evl3.153

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