Intralocus sexual conflict and the tragedy of the commons in seed beetles

Berger, David, Martinossi-Allibert, Ivain, Grieshop, Karl ORCID:, Lind, Martin I., Maklakov, Alexei A. ORCID: and Arnqvist, Göran (2016) Intralocus sexual conflict and the tragedy of the commons in seed beetles. American Naturalist, 188 (4). E98-E112. ISSN 0003-0147

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The evolution of male traits that inflict direct harm on females during mating interactions can result in a so-called tragedy of the commons, where selfish male strategies depress population viability. This tragedy of the commons can be magnified by intralocus sexual conflict (IaSC) whenever alleles that reduce fecundity when expressed in females spread in the population because of their benefits in males. We evaluated this prediction by detailed phenotyping of 73 isofemale lines of the seed beetle Callosobruchus maculatus. We quantified genetic variation in life history andmorphology, as well as associated covariance in male and female adult reproductive success. In parallel, we created replicated artificial populations of each line and measured their productivity. Genetic constraints limited independent trait expression in the sexes, and we identified several instances of sexually antagonistic covariance between traits and fitness, signifying IaSC. Population productivity was strongly positively correlated to female adult reproductive success but uncorrelated with male reproductive success. Moreover, male (female) phenotypic optima for several traits under sexually antagonistic selection were exhibited by the genotypes with the lowest (highest) population productivity. Our study forms a direct link between individuallevel sex-specific selection and population demography and places lifehistory traits at the epicenter of these dynamics.

Item Type: Article
Additional Information: Funding Information: We are thankful to J.Goenaga and J. Rönn for invaluable help with logistics and planning in the laboratory; to B. Stenerlöw at the Division of Biomedical Radiation Sciences, Uppsala University, for providing access to the cesium source; and to I. A. Glitho and T. Ofuya, who kindly provided us with field-collected seedpods. D.B. and M.I.L. were supported by repatriation grants from the Swedish Research Council. D.B., I.M.-A.,K.G., andG.A. were supported by the European Research Council grant AdG-294333 to G.A. A.A.M. and M.I.L. were supported by the European Research Council starting grant AGINGSEXDIFF to A.A.M. Publisher Copyright: © 2016 by The University of Chicago.
Uncontrolled Keywords: adaptation,genetic architecture,population demography,sexual antagonism,sexual dimorphism,sexual selection,ecology, evolution, behavior and systematics ,/dk/atira/pure/subjectarea/asjc/1100/1105
Faculty \ School: Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Centres > Norwich Institute for Healthy Aging
Faculty of Science > Research Groups > Organisms and the Environment
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Depositing User: LivePure Connector
Date Deposited: 07 Oct 2023 01:24
Last Modified: 07 Oct 2023 01:24
DOI: 10.1086/687963

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