Androgen level and male social status in the African cichlid, Astatotilapia burtoni.
Androgen level and male social status in the African cichlid, Astatotilapia burtoni.
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非洲慈鲷、Astatotilapia burtoni 的雄激素水平和雄性社会地位。
DOI：
10.1016/j.bbr.2005.07.011
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Fernald,RussellD
中科院分区：
文献类型：
--
作者：
Parikh,VictoriaN;Clement,TriciaS;Fernald,RussellD
在脊椎动物中，循环雄激素水平由下丘脑-垂体-性腺（HPG）轴调节，大脑通过该轴通过垂体控制性腺。雄激素水平最终取决于包括季节，温度，社会环境，年龄和其他与生殖能力和机会相关的变量在内的因素。先前对非洲慈鲷鱼Astatotilapia burtoni的研究表明，睾酮和11-酮睾酮（11-KT）（硬骨鱼特有的雄激素）的变化取决于雄性社会地位。在这里，我们的特点循环血浆中的睾酮和11-KT的浓度在社会上占主导地位（领土）和社会下属（非领土）的男性。领土男性有显着更高的循环水平的两种形式的雄激素，这是另一个决定性的差异之间的主导和从属男性在这个物种。这些结果强调了如何内部和外部的线索有关的生殖HPG轴的水平集成。
In vertebrates, circulating androgen levels are regulated by the hypothalamic-pituitary-gonadal (HPG) axis through which the brain controls the gonads via the pituitary. Androgen levels ultimately depend on factors including season, temperature, social circumstance, age, and other variables related to reproductive capacity and opportunity. Previous studies with an African cichlid fish, Astatotilapia burtoni, suggested that changes in both testosterone and 11-ketotestosterone (11-KT), an androgen specific to teleost fish, depend on male social status. Here we characterize circulating plasma concentrations of testosterone and 11-KT in socially dominant (territorial) and socially subordinate (non-territorial) males. Territorial males have significantly higher circulating levels of both forms of androgen, which is another defining difference between dominant and subordinate males in this species. These results underscore how internal and external cues related to reproduction are integrated at the level of the HPG axis.