Song amplitude and body size in birds
Song amplitude and body size in birds
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DOI：
10.1007/s00265-009-0743-4
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发表时间：
2009-06-01
影响因子：
2.3
通讯作者：
Brumm, Henrik
中科院分区：
文献类型：
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作者：
Brumm, Henrik
鸟类的鸣叫是一种性选择的多维信号。关于性选择信号进化的一个基本问题是，它们传递的信息是什么，以及它们的诚实是如何保持的。歌声振幅是一个与表演相关的信号特征，个体之间差异很大，但在过去的研究中，这个信号维度被忽略了。我发现，在男性夜莺（Luscinia megarhynchos）和斑胸草雀（Taeniopygia guttata）的中值歌曲幅度没有显着变化与身体大小或剩余的体重。相比之下，我发现了一个显着的负相关性之间的身体大小（和剩余质量）和最大的歌曲振幅在夜莺互动唱歌。然而，这些更微妙的差异在歌曲振幅的功能仍有待研究。总的来说，这项研究的结果表明，平均鸣叫幅度不太可能表明一只鸟的身体大小或目前的状况（测量为剩余质量）。
Bird song is a sexually selected multidimensional signal. A fundamental question regarding the evolution of sexually selected signals is what information they convey and how their honesty is maintained. Song amplitude is a performance-related signal trait that varies considerably between individuals, but this signal dimension has been neglected in past studies. I found that median song amplitude in male nightingales (Luscinia megarhynchos) and zebra finches (Taeniopygia guttata) did not vary significantly with body size or residual body mass. In contrast, I found a significant negative correlation between body size (and also residual mass) and the maximum song amplitude during interactive singing in nightingales. However, the function of these more subtle differences in song amplitude remains to be investigated. By and large, the results of this study suggest that mean song amplitude is unlikely to indicate a bird's body size or current condition (measured as residual mass).