Male-biased sex of extra pair young in the socially monogamous Red-backed Shrike Lanius collurio

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F08%3A00009718" target="_blank" >RIV/60076658:12310/08:00009718 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Male-biased sex of extra pair young in the socially monogamous Red-backed Shrike Lanius collurio
Original language description
Females of many socially monogamous bird species engage in - or even actively seek - copulations Outside their social pair bond. However, in socially monogamous birds with low breeding abundance, such as the Red-backed Shrike, extra-pair paternity (EPP)was thought to be an exceptional and random incident. Drawing on samples collected in an unusually dense Red-backed Shrike Population in the Czech Republic, we show through DNA microsatellite typing that among 65 chicks from 15 nests, 10 individuals (26.5%) had been sired by males other than the nest-attending social mate. All 10 extra pair young were of male sex. In all cases, genetic fathers of extra pair young stemmed from neighbouring territories. Extra pair fathers had significantly longer tarsi than social mates, indicating that female choice was a function of age-class dependent male body size. Our findings support sex allocation theory, which Suggests that promiscuous females mating with higher quality males should produce mostl
Czech name
Muži ovlivněný sex mimopárových mladých u sociálně monogamního Lanius collurio
Czech description
Muži ovlivněný sex mimopárových mladých u sociálně monogamního Lanius collurio.

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
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Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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