Interspecific variation in egg testosterone levels: implications for the evolution of bird song
Interspecific variation in egg testosterone levels: implications for the evolution of bird song
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鸡蛋睾酮水平的种间变异：对鸟鸣进化的影响
DOI：
--
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发表时间：
2007
影响因子：
2.1
通讯作者：
N. Saino
中科院分区：
文献类型：
--
作者：
L. Garamszegi;C. Biard;Marcel Eens;Anders Pape Møller;N. Saino
虽然通过睾酮水平的母体效应的种间变异可以通过自然选择介导，但对卵子睾酮对性选择的进化后果知之甚少。然而，两个非排他性的进化假说预测卵睾酮水平和性特征的阐述之间的种间关系。首先，在性选择的物种中，母亲的投资可能会特别增强，这应该会产生积极的关系。其次，产前高睾酮水平可能会限制性征的发育，这将导致负面关系。在这里，我们调查了这些假设，通过探索蛋黄睾酮水平和歌曲的功能之间的关系，在36个雀形目物种的系统发育研究。我们发现，歌曲的持续时间和音节库的大小显着负相关的睾丸激素水平在鸡蛋中，即使潜在的混淆因素保持不变。这些关系意味着，在歌曲的早期发展高睾酮水平可能是有害的，从而支持发展制约假说。相比之下，我们发现了重要的证据，即相对于植被高度的歌曲后暴露与卵子睾酮水平呈正相关。这些结果支持了这样一个假设，即高水平的母体睾酮已经在具有强烈性选择作用于歌曲位置的物种中进化出来。我们发现不显着的影响，歌间间隔和歌曲类型曲目的大小，这可能表明，没有上述假设适用于这些特征，或者他们同时采取行动，并有相反的效果。
Although interspecific variation in maternal effects via testosterone levels can be mediated by natural selection, little is known about the evolutionary consequences of egg testosterone for sexual selection. However, two nonexclusive evolutionary hypotheses predict an interspecific relationship between egg testosterone levels and the elaboration of sexual traits. First, maternal investment may be particularly enhanced in sexually selected species, which should generate a positive relationship. Secondly, high prenatal testosterone levels may constrain the development of sexual characters, which should result in a negative relationship. Here we investigated these hypotheses by exploring the relationship between yolk testosterone levels and features of song in a phylogenetic study of 36 passerine species. We found that song duration and syllable repertoire size were significantly negatively related to testosterone levels in the egg, even if potentially confounding factors were held constant. These relationships imply that high testosterone levels during early development of songs may be detrimental, thus supporting the developmental constraints hypothesis. By contrast, we found significant evidence that song‐post exposure relative to the height of the vegetation is positively related to egg testosterone levels. These results support the hypothesis that high levels of maternal testosterone have evolved in species with intense sexual selection acting on the location of song‐posts. We found nonsignificant effects for intersong interval and song type repertoire size, which may suggest that none of the above hypothesis apply to these traits, or they act simultaneously and have opposing effects.
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DOI：
10.1016/0300-9629(96)00009-6
发表时间：
1996-07-01
影响因子：
2.3
作者：
Schwabl, H
通讯作者：
Schwabl, H
影响因子：
2.5
作者：
F. S. Livingston;Richard Mooney
通讯作者：
F. S. Livingston;Richard Mooney
睾丸激素引起的鸟类鸣叫发育储存期的缩短会干扰声音学习。
DOI：
10.1002/dev.420280703
发表时间：
1995
期刊：
Developmental psychobiology.
影响因子：
--
作者：
Whaling,CS;Nelson,DA;Marler,P
通讯作者：
Marler,P
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