Plumage colour acquisition and behaviour are associated with androgens in a phenotypically plastic tropical bird
Plumage colour acquisition and behaviour are associated with androgens in a phenotypically plastic tropical bird
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表型可塑热带鸟类的羽毛颜色获取和行为与雄激素有关
DOI：
10.1016/j.anbehav.2009.02.027
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发表时间：
2009
期刊：
影响因子：
2.5
通讯作者：
H. Schwabl
中科院分区：
文献类型：
--
作者：
W. Lindsay;M. Webster;Claire W. Varian;H. Schwabl
雄激素调节男性生殖行为，可能是性信号和生理状况之间的机制联系。然而，这些激素在调节雀形目鸟类婚前换羽和雄性羽毛信号中的作用尚不清楚。红背鹪鹩（Malurus melanocephalus）的羽毛颜色是一种性选择特征，雄性表现出三种生殖表型：雄性可以繁殖出亮红色和黑色的羽毛，也可以是暗棕色的羽毛，也可以是暗淡的羽毛，作为非繁殖的辅助；每种表型在亲代和繁殖行为上都是不同的。我们发现血浆雄激素浓度在雄性表型之间存在显著差异，在所有筑巢阶段，红/黑繁殖雄性的水平最高，而辅助雄性的水平最低。这些激素差异也存在于婚前换毛期间。根据在随后的繁殖季节获得的表型，雄性在换羽期间的身体状况也存在显著差异，红/黑色繁殖雄性处于最佳状态，而辅助雄性处于最差状态。此外，雄性激素浓度与婚前蜕皮期间的身体状况呈正相关。因此，在这个物种中，雄激素可能决定羽毛的颜色，并在性信号的表达和身体状况之间提供联系。
Androgens regulate male reproductive behaviour and may be a mechanistic link between sexual signals and physiological condition. However, the role of these hormones in regulating prenuptial moult and male plumage signals of passerine birds is unclear. In the red-backed fairy-wren, Malurus melanocephalus, plumage colour is a sexually selected trait and males express three reproductive phenotypes: males can breed in bright red and black plumage or in dull brown plumage, or assume dull plumage and act as nonbreeding auxiliaries; each phenotype differs in parental and reproductive behaviour. We found that plasma androgen concentrations differed significantly between male phenotypes, with red/black breeding males having the highest levels and auxiliaries having the lowest levels across all nesting stages. These hormonal differences were also present during the prebreeding moult when nuptial plumage is acquired. Males also differed significantly in body condition during moult based on the phenotype acquired in the subsequent breeding season, with red/black breeding males being in the best condition and auxiliaries being in the poorest condition. Moreover, androgen concentrations were positively correlated with body condition during prenuptial moult. Thus, in this species, androgens may determine plumage coloration and provide a link between the expression of sexual signals and body condition.
DOI：
10.1073/pnas.90.24.11446
发表时间：
1993-12-15
影响因子：
11.1
作者：
SCHWABL, H
通讯作者：
SCHWABL, H