Avian mothers create different phenotypes by hormone deposition in their eggs
Avian mothers create different phenotypes by hormone deposition in their eggs
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DOI：
10.1098/rsbl.2005.0391
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发表时间：
2006-03-22
期刊：
影响因子：
3.3
通讯作者：
Groothuis, Ton G. G.
中科院分区：
文献类型：
--
作者：
Eising, Corine M.;Muller, Wendt;Groothuis, Ton G. G.
越来越多的各种分类群的研究证明了母性类固醇对后代发育的作用。在鸟类中，母亲在她们的卵中沉积了大量的雄激素，实验证据表明，这些母亲的雄激素影响雏鸟的早期发育。尽管众所周知，性类固醇对大脑和行为的组织作用是众所周知的，但对鸟类母体卵子激素的研究几乎完全集中在雏鸟阶段。在这里，我们的实验表明，在黑嘴鸥中，卵中的母体雄激素促进了婚礼羽毛的发育，并在孵化近1年后出现攻击性和有性表现的频率。我们得出结论，母性类固醇可能是决定同一性别和物种内细微但重要的个体差异的关键因素，这可能对达尔文的适应性和进化过程产生重要的影响。
An increasing number of studies in a variety of taxa demonstrate the role of maternal sex steroids on offspring development. In avian species, mothers deposit substantial amounts of androgens in their eggs, and experimental evidence indicates that these maternal androgens influence the chick's early development. Despite the well-known organizing role of sex steroids on brain and behaviour, studies on avian maternal egg hormones almost exclusively focus on the chick phase. Here, we show experimentally that in Black-headed gulls maternal androgens in the egg enhance the development of the nuptial plumage and the frequency of aggressive and sexual displays almost 1 year after hatching. We conclude that maternal sex steroids may be a key factor for the determination of subtle but important individual differences within the same sex and species, which may have important consequences for Darwinian fitness and evolutionary processes.