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Typical versions of learned swamp sparrow song types are more effective signals than are less typical versions

机译:学习的沼泽麻雀歌曲类型的典型版本比不太典型的版本更有效的信号

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摘要

The learned songs of songbirds often cluster into population-wide types. Here, we test the hypothesis that male and female receivers respond differently to songs depending on how typical of those types they are. We used computational methods to cluster a large sample of swamp sparrow (Melospiza georgiana) songs into types and to estimate the degree to which individual song exemplars are typical of these types. We then played exemplars to male and female receivers. Territorial males responded more aggressively and captive females performed more sexual displays in response to songs that are highly typical than to songs that are less typical. Previous studies have demonstrated that songbirds distinguish song types that are typical for their species, or for their population, from those that are not. Our results show that swamp sparrows also discriminate typical from less typical exemplars within learned song-type categories. In addition, our results suggest that more typical versions of song types function better, at least in male–female communication. This finding is consistent with the hypothesis that syllable type typicality serves as a proxy for the assessment of song learning accuracy.
机译:鸣禽学到的歌曲通常会聚集到整个人群中。在这里,我们测试了一个假设,即男性和女性接收者对歌曲的反应不同,这取决于它们在这些类型中的典型程度。我们使用计算方法将沼泽麻雀(Melospiza georgiana)歌曲的大样本聚类为类型,并估计单个歌曲示例在这些类型中的典型程度。然后,我们为男性和女性接受者演奏了典范。领土男性的反应更加积极,而圈养的女性则对典型的歌曲比不典型的歌曲进行更多的性展示。先前的研究表明,鸣禽区分的是其种类或种群的典型歌曲类型与非典型的歌曲类型。我们的研究结果表明,沼泽麻雀还将学到的歌曲类型类别中的典型样本与较不典型的样本区分开。另外,我们的结果表明,至少在男女交流中,更典型的歌曲类型功能更好。这一发现与音节类型典型性可作为评估歌曲学习准确性的代理的假设相一致。

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