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Old, colourful male...
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Sundberg, JanUppsala universitet,Zooekologi
(författare)
Old, colourful male yellowhammers, Emberiza citrinella, benefit from extra-pair copulations
- Artikel/kapitelEngelska1996
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Elsevier BV,1996
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LIBRIS-ID:oai:DiVA.org:uu-268362
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-268362URI
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https://doi.org/10.1006/anbe.1996.0157DOI
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Språk:engelska
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Sammanfattning på:engelska
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The frequency of extra-pair paternity was determined in broods of the yellowhammer using single-locus DNA fingerprinting. Of 32 analysed clutches, 69% contained at least one extra-pair young. Out of 123 nestlings, 37% were extra-pair sired young. The extra-pair male could be assigned to 23 (50%) nestlings. Successful extra-pair males were all at least 3 years old although both younger and older males suffered from extra-pair paternity. Extra-pair males were also significantly more colourful than pair males, but did not differ in other characters. Colour did not differ between males with or without extra-pair young. The frequency of extra-pair young was not related to breeding density and identified extra-pair males were not necessarily nearest neighbours, giving further evidence that extra-pair males are not chosen at random. Since females do not obtain anything but sperm from extra-pair males, the results suggest that females prefer older and more colourful males, contributing good or attractive genes, as indicated by their plumage. Consequently, old, colourful extra-pair males, and possibly females, are likely to benefit from extra-pair copulations.
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Dixon, Andrew
(författare)
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Uppsala universitetZooekologi
(creator_code:org_t)
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Ingår i:Animal Behaviour: Elsevier BV52, s. 113-1220003-34721095-8282
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