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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Variation in parent‐offspring kinship in socially monogamous systems with extra‐pair reproduction and inbreeding
Author(s): Reid, Jane M
Bocedi, Greta
Nietlisbach, Pirmin
Duthie, A Bradley
Wolak, Matthew
Gow, Elizabeth
Arcese, Peter
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Keywords: Cuckoldry
paternal investment
sexual conflict
Issue Date: Jul-2016
Date Deposited: 8-Nov-2016
Citation: Reid JM, Bocedi G, Nietlisbach P, Duthie AB, Wolak M, Gow E & Arcese P (2016) Variation in parent‐offspring kinship in socially monogamous systems with extra‐pair reproduction and inbreeding. Evolution, 70 (7), pp. 1512-1529.;
Abstract: Female extra-pair reproduction in socially monogamous systems is predicted to cause cuckolded socially-paired males to conditionally reduce paternal care, causing selection against extra-pair reproduction and underlying polyandry. However, existing models and empirical studies have not explicitly considered that cuckolded males might be related to their socially-paired female and/or to her extra-pair mate, and therefore be related to extra-pair offspring that they did not sire but could rear. Selection against paternal care, and hence against extra-pair reproduction, might then be weakened. We derive metrics that quantify allele-sharing between within-pair and extra-pair offspring and their mother and her socially-paired male in terms of coefficients of kinship and inbreeding. We use song sparrow (Melospiza melodia) paternity and pedigree data to quantify these metrics, and thereby quantify the joint effects of extra-pair reproduction and inbreeding on a brood's total allelic value to its socially-paired parents. Cuckolded male song sparrows were almost always detectably related to extra-pair offspring they reared. Consequently, although brood allelic value decreased substantially following female extra-pair reproduction, this decrease was reduced by within-pair and extra-pair reproduction among relatives. Such complex variation in kinship within nuclear families should be incorporated into models considering coevolutionary dynamics of extra-pair reproduction, parental care, and inbreeding.
DOI Link: 10.1111/evo.12953
Rights: Copyright 2016 The Author(s). Evolution published by Wiley Periodicals, Inc. on behalf of The Society for the Study of Evolution. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited
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