2011 Fiscal Year Final Research Report
Sexual conflict on determining breeding timing resulted from extra-pair mating.
| Project/Area Number |
21770014
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Ecology/Environment
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| Research Institution | Nagasaki University (2010-2011)
The University of Tokyo (2009) |
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Principal Investigator |
YAMAGUCHI Noriyuki 長崎大学, 大学院・水産・環境科学総合研究科, 准教授 (60436764)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ツバメ / Hirundo rustica / 繁殖戦略 / つがい外交尾 / 配偶防衛 / 繁殖同調性 / マイクロサテライト |
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| Research Abstract |
(a) We found that the peak of mate guard behavior by males several days before laying date of their pairs. When mating with males having small red patch size in their throat(that means the male convey relatively inferior genes in the perspective of survival), the females escaped from their male mates and sought extra-pair mates. Actually the broods of such females contained extra-pair offspring. However, the intensity of male mate guards was not correlated with the size of their throat patch or the degree of female infidelity. Provisioning effort of males was negatively correlated with the degree of female infidelity.(b) Testosterone level in feces from three pairs peaked at several days before laying dates, which suggests that such hormonal level may affect mating behavior of male and females.
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[Presentation] Changes of provisioning rules in relation to weather conditions in the Barn Swallow2012
Author(s)
Sakura, N., Kitamura, W., Sugawara, A., Asai, A., Matsuda, A., Yamaguchi, N., Fujita, G., and Higuchi, H
Organizer
Joint Meeting of the 59th Annual Meeting of ESJ and the 5th EAFES International Congress, Ryukoku Univ
Place of Presentation
Shiga, Japan, March
Year and Date
20120000
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