Inbreeding and divorce in blue and great tits
Identifieur interne : 000B99 ( Istex/Curation ); précédent : 000B98; suivant : 000C00Inbreeding and divorce in blue and great tits
Auteurs : Bart Kempenaers ; Frank Adriaensen ; André A. DhondtSource :
- Animal Behaviour [ 0003-3472 ] ; 1998.
Abstract
In blue tits,Parus caeruleus, and other wild birds, matings between close relatives or between genetically similar individuals are associated with fitness costs, often in terms of lower hatching success of the eggs. If individuals cannot assess their genetic similarity to potential mates, those fitness costs may be hard to avoid; however, they may use the proportion of unhatched eggs in their clutch as a cue for their mate choice in the next season. We tested this hypothesis using data from a long-term population study on blue and great tits,Parus major. Divorce in response to inbreeding depression can be considered a special case of the ‘incompatibility hypothesis’. As predicted from this hypothesis, both male and female blue tits benefited from divorce when part of their clutch failed to hatch. There was no evidence however, that divorce in blue or great tits was related to the presence of unhatched eggs in the nest.
Url:
DOI: 10.1006/anbe.1998.0800
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Bart Kempenaers<affiliation><mods:affiliation>Konrad Lorenz Institute for Comparative Ethology, KLIVV, Austrian Academy of Sciences</mods:affiliation>
<wicri:noCountry code="subField">Sciences</wicri:noCountry>
</affiliation>
<affiliation><mods:affiliation>Department of Biology, University of Antwerp, UIA</mods:affiliation>
<wicri:noCountry code="subField">UIA</wicri:noCountry>
</affiliation>
<affiliation><mods:affiliation>Cornell Laboratory of Ornithology</mods:affiliation>
<wicri:noCountry code="no comma">Cornell Laboratory of Ornithology</wicri:noCountry>
</affiliation>
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<front><div type="abstract" xml:lang="en">In blue tits,Parus caeruleus, and other wild birds, matings between close relatives or between genetically similar individuals are associated with fitness costs, often in terms of lower hatching success of the eggs. If individuals cannot assess their genetic similarity to potential mates, those fitness costs may be hard to avoid; however, they may use the proportion of unhatched eggs in their clutch as a cue for their mate choice in the next season. We tested this hypothesis using data from a long-term population study on blue and great tits,Parus major. Divorce in response to inbreeding depression can be considered a special case of the ‘incompatibility hypothesis’. As predicted from this hypothesis, both male and female blue tits benefited from divorce when part of their clutch failed to hatch. There was no evidence however, that divorce in blue or great tits was related to the presence of unhatched eggs in the nest.</div>
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