Age-dependent trajectories differ between within-pair and extra-pair paternity success

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Title: Age-dependent trajectories differ between within-pair and extra-pair paternity success
Author(s): Hsu, Y-H
Simons, MJP
Schroeder, J
Girndt, A
Winney, IS
Burke, T
Nakagawa, S
Item Type: Journal Article
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, although not significantly, 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 pay-offs. Males may partition their reproductive effort between within- and extra-pair matings depending on their current age 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.
Publication Date: 3-Apr-2017
Date of Acceptance: 20-Feb-2017
URI: http://hdl.handle.net/10044/1/48384
DOI: https://dx.doi.org/10.1111/jeb.13058
ISSN: 1010-061X
Publisher: Wiley
Start Page: 951
End Page: 959
Journal / Book Title: Journal of Evolutionary Biology
Volume: 30
Issue: 5
Copyright Statement: © 2017 The Author(s). Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary Biology. This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Deutsche Forschungsgemeinschaft ( German Research Foundation )
Funder's Grant Number: SCHR 1447/1-1
Keywords: Science & Technology
Life Sciences & Biomedicine
Ecology
Evolutionary Biology
Genetics & Heredity
Environmental Sciences & Ecology
ageing
breeding success
indirect benefits
life-history strategy
mating system
optimal allocation strategy
MALE REPRODUCTIVE SUCCESS
LONG-LIVED SEABIRD
SPARROW PASSER-DOMESTICUS
HOUSE SPARROW
SELECTIVE DISAPPEARANCE
TERMINAL INVESTMENT
FEMALE PREFERENCE
NATURAL-SELECTION
IMMUNE CHALLENGE
BREEDING SUCCESS
ageing
breeding success
indirect benefits
life-history strategy
mating system
optimal allocation strategy
Evolutionary Biology
0603 Evolutionary Biology
0608 Zoology
Publication Status: Published
Appears in Collections:Faculty of Natural Sciences



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