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Old, colourful male...
Old, colourful male yellowhammers, Emberiza citrinella, benefit from extra-pair copulations
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- Sundberg, Jan (författare)
- Uppsala universitet,Zooekologi
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Dixon, Andrew (författare)
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(creator_code:org_t)
- Elsevier BV, 1996
- 1996
- Engelska.
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Ingår i: Animal Behaviour. - : Elsevier BV. - 0003-3472 .- 1095-8282. ; 52, s. 113-122
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
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- art (ämneskategori)
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