Source:http://linkedlifedata.com/resource/pubmed/id/15596071
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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
2004-12-14
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pubmed:abstractText |
Analyses of the development of the reproductive system in seasonally breeding birds in the framework of long-term ecological studies are rare. Here, we present the first results of such a study in two Corsican populations of a European passerine bird, the blue tit (Parus caeruleus). The two study populations occupy different oak habitats and are separated by only 25 km. Despite their close proximity, they show a one-month difference in onset of egg laying, even after controlling for altitude. This micro-geographic difference in breeding date appears adaptive because both study populations raise chicks when food is most plentiful. In our study, males reached their maximum song activity during the egg-laying stage while maximal testosterone levels and testes sizes were reached 2-3 weeks before egg laying. The rate of development of the reproductive system in males was much faster in the earlier population, in spite of a similar onset of gonad development and song activity for the two study populations. No change in the volume of the song-control nuclei (HVC and RA) could be detected during the study period. Development of brain nuclei was completed 2-3 months before the beginning of intense sexual activity.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Jan
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pubmed:issn |
0016-6480
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
1
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pubmed:volume |
140
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
52-60
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:15596071-Animals,
pubmed-meshheading:15596071-Brain,
pubmed-meshheading:15596071-Environment,
pubmed-meshheading:15596071-Female,
pubmed-meshheading:15596071-France,
pubmed-meshheading:15596071-Male,
pubmed-meshheading:15596071-Ovary,
pubmed-meshheading:15596071-Reproduction,
pubmed-meshheading:15596071-Seasons,
pubmed-meshheading:15596071-Songbirds,
pubmed-meshheading:15596071-Testis,
pubmed-meshheading:15596071-Testosterone,
pubmed-meshheading:15596071-Time Factors,
pubmed-meshheading:15596071-Vocalization, Animal
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pubmed:year |
2005
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pubmed:articleTitle |
Endocrine correlates of the breeding asynchrony between two Corsican populations of blue tits (Parus caeruleus).
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pubmed:affiliation |
Center for Cellular and Molecular Neurobiology, Research Group in Behavioural Neuroendocrinology, Univ. of Liège, 17 Place Delcour (Bât. L1), B-4020 Liège, Belgium.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
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