Hsu, Y.H., Simons, M.J. orcid.org/0000-0001-7406-7708, Schroeder, J. et al. (4 more authors) (2017) Age-dependent trajectories differ between within-pair and extra-pair paternity success. Journal of Evolutionary Biology. ISSN 1010-061X
Abstract
Reproductive success is associated with age in many taxa, increasing in early life followed by reproductive senescence. In socially monogamous, but genetically polygamous species, this generates the interesting possibility of differential trajectories of within-pair and extra-pair siring success with age in males. We investigate these relationships simultaneously using within-individual analyses with 13 years of data from an insular house sparrow (Passer domesticus) population. As expected, we found that both within- and extra-pair paternity success increased with age, followed by a senescence-like decline. However, the age trajectories of within- and extra-pair paternity successes differed significantly, with the extra-pair paternity success increasing faster, albeit non-significantly so, in early life, and showing a delayed decline by 1.5 years on average later in life compared to within-pair paternity success. These different trajectories indicate that the two alternative mating tactics should have age-dependent payoffs. Males may partition their reproductive effort between within- and extra-pair matings depending on their current age in order to reap the maximal combined benefit from both strategies. The interplay between these mating strategies and age-specific mortality may explain the variation in rates of extra-pair paternity observed within and between-species. This article is protected by copyright. All rights reserved.
Metadata
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Copyright, Publisher and Additional Information: | © 2017 Wiley. This is the peer reviewed version of the following article: Hsu, Yu‐Hsun, et al. "Age‐dependent trajectories differ between within‐pair and extra‐pair paternity success." Journal of Evolutionary Biology (2017)., which has been published in final form at https://doi.org/10.1111/jeb.13058 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving." | ||||||
Keywords: | Ageing; breeding success; indirect benefits; life-history strategy; mating system; optimal allocation strategy | ||||||
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Institution: | The University of Sheffield | ||||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield) | ||||||
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Depositing User: | Symplectic Sheffield | ||||||
Date Deposited: | 09 Mar 2017 14:44 | ||||||
Last Modified: | 24 Feb 2018 01:38 | ||||||
Published Version: | https://doi.org/10.1111/jeb.13058 | ||||||
Status: | Published online | ||||||
Publisher: | Wiley | ||||||
Refereed: | Yes | ||||||
Identification Number: | https://doi.org/10.1111/jeb.13058 | ||||||
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