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  • 1
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    Male attractiveness and differential testosterone investment in zebra finch eggs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: Good-genes hypotheses of sexual selection predict that offspring fathered by preferred males should have increased viability resulting from superior genetic quality. Several studies of birds have reported findings consistent with this prediction, but maternal effects are an important confounding variable. Those studies that have attempted to control for maternal effects have only considered differential maternal investment after egg laying. However, female birds differentially deposit testosterone in the eggs, and this influences the development of the chick. This study shows that female birds deposit higher amounts of testosterone and 5alpha-dihydrotestosterone in their eggs when mated to more attractive males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gil, D -- Graves, J -- Hazon, N -- Wells, A -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):126-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Environmental and Evolutionary Biology, University of St. Andrews, St. Andrews, Fife KY16 9TS, UK. Diego.Gil@u-paris10.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506561" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dihydrotestosterone/metabolism ; Egg Yolk/metabolism ; Female ; Male ; Oviposition ; Ovum/*metabolism ; Random Allocation ; *Sexual Behavior, Animal ; Songbirds/genetics/*physiology ; Testosterone/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Support for a colleague (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-03-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alatalo, R V -- Aragon, S -- Aviles, J M -- Barbosa, A -- Gomes, C Bessa -- Cadee, N -- Christe, P -- Cuervo, J J -- Diaz, M -- Erritzoe, J -- Galeotti, P -- Garamszegi, L Z -- Gil, D -- Gontard-Danek, M -- Legendre, S -- Martin, T E -- Martinez, J -- Martin-Vivaldi, M -- Martinez, J G -- Merino, S -- Moreno, J -- Mousseau, Tim -- Ninni, P -- Petrie, M -- Pulido, F -- Rubolini, D -- Saino, N -- Soler, J J -- Soler, M -- Spottiswoode, C -- Szep, T -- Thornhill, R -- Zamora, C -- Sacchi, Roberto -- New York, N.Y. -- Science. 2004 Mar 12;303(5664):1612.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15016981" target="_blank"〉PubMed〈/a〉
    Keywords: *Ecology ; Publishing ; *Scientific Misconduct
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
    Electronic Resource
    Electronic Resource
    Multiple song repertoire characteristics in the willow warbler (Phylloscopus trochilus): correlations with female choice and offspring viability (2000)
    Springer
    Behavioral ecology and sociobiology 47 (2000), S. 319-326 
    Details
    ISSN: 1432-0762
    Keywords: Key words Mate choice ; Song complexity ; Song repertoire size ; Multiple ornaments ; Phylloscopus trochilus ; Reproductive success ; Viability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Male willow warblers have song repertoires which vary in complexity along several dimensions. We examined whether female choice, as measured by date of pairing, was based on these song characteristics in 4 different years. Pairing date was negatively correlated with song repertoire size in 1 year, and with song versatility in another year, but there was no consistent effect of any song characteristic on pairing throughout the years or in the pooled sample. The variable that best explained how soon a male pairs is male arrival date (only males that had settled territories before the first female arrived were considered in the analysis). This correlation is consistently significant in all years. This is most parsimoniously interpreted as females choosing some habitat characteristic in the same way that males do. A small percentage of males (8.3%) attracted and paired with a second female. The likelihood of becoming polygynous was not explained by any measured song characteristic, but it was related to arrival date: early males were more likely to pair with two females. Males with large repertoires fledged more young in their primary nests, and there was a trend for the offspring of these males to have a greater probability of being recruited into the population. In conclusion, the results show that in most years there is no sexual selection by female preference on song characteristics, although the data on reproductive success is consistent with the idea of repertoire size being an indicator of male quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650050672
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