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Optimal sperm lengt...
Optimal sperm length for high siring success depends on forehead patch size in collared flycatchers
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- Ålund, Murielle (författare)
- Uppsala universitet,Zooekologi,Michigan State Univ, Dept Integrat Biol, Giltner Hall 362, E Lansing, MI 48825 USA
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- Persson Schmiterlöw, Siri (författare)
- Uppsala universitet,Zooekologi
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- McFarlane, S. Eryn (författare)
- Uppsala universitet,Zooekologi,Univ Edinburgh, Inst Evolutionary Biol, Charlotte Auerbach Rd, Edinburgh EH9 3FL, Midlothian, Scotland
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visa fler...
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- Qvarnström, Anna (författare)
- Uppsala universitet,Zooekologi
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(creator_code:org_t)
- 2018-08-09
- 2018
- Engelska.
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Ingår i: Behavioral Ecology. - : OXFORD UNIV PRESS INC. - 1045-2249 .- 1465-7279. ; 29:6, s. 1436-1443
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Dominance over rivals, sexual attractiveness, and highly efficient ejaculates are 3 important contributors of male fertilization success but theories about how primary and secondary sexual characters may co-evolve largely remain to be tested. We investigated how variation in a sexual signal (forehead patch size) and sperm morphology jointly affected siring success of 70 males in a natural population of collared flycatchers. We show that the optimal sperm length to attain high relative fertilization success depended on the size of a male's secondary sexual character. Males with small forehead patches sired more offspring in their nest when they produced long sperm and vice-versa. These results are not compatible with theories based on simple relationships between display traits and sperm "quality" but imply that the optimal fertilization strategy (and hence optimal sperm traits) differs between males even in a predominantly socially monogamous population with moderate extra-pair paternity rates. Thus, a better knowledge of the complex chain of behavioural interactions between the sexes and their gametes is needed for a complete understanding of how sexual selection operates in nature.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Nyckelord
- extra-pair paternity
- fertilization success
- Ficedula flycatcher
- mating strategy
- secondary sexual character
- sperm morphology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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