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Titre du document / Document title

Are There Indirect Fitness Benefits of Female Extra-Pair Reproduction? Lifetime Reproductive Success of Within-Pair and Extra-Pair Offspring

Auteur(s) / Author(s)

SARDELL Rebecca J. (1 2) ; ARCESE Peter (3) ; KELLER Lukas F. (4) ; REID Jane M. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Institute of Biological and Environmental Sciences, School of Biological Sciences, Zoology Building, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, ROYAUME-UNI
(2) Department of Biological Science, Florida State University, Tallahassee, Florida 32306, ETATS-UNIS
(3) Centre for Applied Conservation Research, Forest Sciences, 2424 Main Mall, University of British Columbia, Vancouver V6T 1Z4, CANADA
(4) Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, SUISSE

Résumé / Abstract

The forces driving extra-pair reproduction by socially monogamous females, and the resulting genetic polyandry, remain unclear. A testable prediction of the hypothesis that extra-pair reproduction partly reflects indirect selection on females is that extra-pair young (EPY) will be fitter than their within-pair young (WPY) maternal half-siblings. This prediction has not been comprehensively tested in a wild population, requiring data on the lifetime reproductive success (LRS) of maternal half-sib EPY and WPY. We used 17 years of genetic parentage data from song sparrows, Melospiza melodia, to compare the LRS of hatched EPY and WPY maternal half-siblings measured as their lifetime number of hatched offspring, recruited offspring, and hatched grandoffspring. EPY hatchlings were not significantly fitter than WPY hatchlings for any of three measures of LRS. Furthermore, opposite to prediction, EPY hatchlings tended to have lower LRS than their maternal half-sibling WPY hatchlings on average. EPY also tended to be less likely to survive to hatch than their maternal half-sibling WPY. Taken together, these results fail to support one key hypothesis explaining the evolution of genetic polyandry by socially monogamous females and suggest there may be weak indirect selection against female extra-pair reproduction in song sparrows.

Revue / Journal Title

The American naturalist    ISSN  0003-0147   CODEN AMNTA4 

Source / Source

2012, vol. 179, no6, pp. 779-793 [15 page(s) (article)] (1 p.3/4)

Langue / Language

Anglais

Editeur / Publisher

University of Chicago Press, Chicago, IL, ETATS-UNIS  (1867) (Revue)

Mots-clés anglais / English Keywords

Breeding behavior

;

Polyandry

;

Sibling

;

Genetics

;

Extra pair copulation

;

Progeny

;

Breeding success

;

Lifetime

;

Reproduction

;

Female

;

Fitness

;

Mots-clés français / French Keywords

Comportement reproducteur

;

Polyandrie

;

Fratrie

;

Génétique

;

Copulation hors couple

;

Descendance

;

Succès reproducteur

;

Durée vie

;

Reproduction

;

Femelle

;

Fitness

;

Mots-clés espagnols / Spanish Keywords

Conducta reproductora

;

Poliandria

;

Hermandad

;

Genética

;

Cópula extra pareja

;

Descendencia

;

Exito reproductor

;

Tiempo vida

;

Reproducción

;

Hembra

;

Adecuación

;

Mots-clés d'auteur / Author Keywords

extra-pair paternity

;

fitness

;

genetic benefits

;

half-sibling

;

indirect selection

;

polyandry

;

Localisation / Location

INIST-CNRS, Cote INIST : 2099, 35400050775585.0080

Nº notice refdoc (ud4) : 25952142



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