The cost of infidelity to female reed buntings
Identifieur interne : 000539 ( Main/Exploration ); précédent : 000538; suivant : 000540The cost of infidelity to female reed buntings
Auteurs : Stefan M. Suter [Suisse] ; Joanna Bielaska [Suisse] ; Sabine Rthlin-Spillmann [Suisse] ; Ludivine Strambini [Suisse] ; Dietrich R. Meyer [Suisse]Source :
- Behavioral Ecology [ 1045-2249 ] ; 2009-04-03.
Abstract
Females of many socially monogamous bird species accept or even actively seek copulations outside the social pair bond. It has been shown that females profit from extrapair fertilization by increased offspring quality, but extrapair mating may also induce costs to females. We measured parental food provisioning and paternity in the reed bunting, Emberiza schoeniclus, a species with biparental brood care and high levels of extrapair paternity (EPP). We found a negative relationship between the proportion of EPP in broods and paternal care across the local population. Individual males adjusted food provisioning to the amount of EPP between sequential broods. Females did compensate for low male food provisioning. The cost of extrapair fertilizations to females is increased nestling mortality due to the social partner's reduction of brood care. If the mixed mating system of the reed bunting is at an evolutionary equilibrium, we expect that genetic fitness for males as well as for females is maximized. Any costs incurred by extrapair mating should therefore not exceed the benefits for both sexes.
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DOI: 10.1093/beheco/arp037
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It has been shown that females profit from extrapair fertilization by increased offspring quality, but extrapair mating may also induce costs to females. We measured parental food provisioning and paternity in the reed bunting, Emberiza schoeniclus, a species with biparental brood care and high levels of extrapair paternity (EPP). We found a negative relationship between the proportion of EPP in broods and paternal care across the local population. Individual males adjusted food provisioning to the amount of EPP between sequential broods. Females did compensate for low male food provisioning. The cost of extrapair fertilizations to females is increased nestling mortality due to the social partner's reduction of brood care. If the mixed mating system of the reed bunting is at an evolutionary equilibrium, we expect that genetic fitness for males as well as for females is maximized. Any costs incurred by extrapair mating should therefore not exceed the benefits for both sexes.</div></front></TEI><affiliations><list><country><li>Suisse</li></country><region><li>Canton de Fribourg</li></region><settlement><li>Fribourg</li></settlement><orgName><li>Université de Fribourg</li></orgName></list><tree><country name="Suisse"><region name="Canton de Fribourg"><name sortKey="Suter, Stefan M" sort="Suter, Stefan M" uniqKey="Suter S" first="Stefan M." last="Suter">Stefan M. Suter</name></region><name sortKey="Bielaska, Joanna" sort="Bielaska, Joanna" uniqKey="Bielaska J" first="Joanna" last="Bielaska">Joanna Bielaska</name><name sortKey="Meyer, Dietrich R" sort="Meyer, Dietrich R" uniqKey="Meyer D" first="Dietrich R." last="Meyer">Dietrich R. Meyer</name><name sortKey="Meyer, Dietrich R" sort="Meyer, Dietrich R" uniqKey="Meyer D" first="Dietrich R." last="Meyer">Dietrich R. Meyer</name><name sortKey="Rthlin Spillmann, Sabine" sort="Rthlin Spillmann, Sabine" uniqKey="Rthlin Spillmann S" first="Sabine" last="Rthlin-Spillmann">Sabine Rthlin-Spillmann</name><name sortKey="Strambini, Ludivine" sort="Strambini, Ludivine" uniqKey="Strambini L" first="Ludivine" last="Strambini">Ludivine Strambini</name><name sortKey="Suter, Stefan M" sort="Suter, Stefan M" uniqKey="Suter S" first="Stefan M." last="Suter">Stefan M. Suter</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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