Regularities in zebra finch song beyond the repeated motif
Regularities in zebra finch song beyond the repeated motif
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DOI：
10.1016/j.beproc.2017.11.001
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发表时间：
2019-06-01
影响因子：
1.3
通讯作者：
Tchernichovski, Ofer
中科院分区：
文献类型：
--
作者：
Bruno, Julia Hyland;Tchernichovski, Ofer
鸟叫声研究在发声学习的神经机制中的扩散归功于斑胸草雀的叫声主题的显著定型。母题是由几个音节组成的，鸟类学会以固定的顺序发出这些音节。但是在更高层次的组织中，斑胸草雀的歌声不再是一成不变的。歌曲回合包括几个重复的主题，这往往是由一个可变数量的短“连接器”发声。在这篇概念方法的论文中，我们证明了组合分析本身产生了一个不完整的描述，这种回合级结构。相比之下，研究鸟鸣作为一个随时间变化的模拟信号可以揭示模式的灵活性，在节奏组织的歌曲回合。在排序栅格图中可视化大型歌曲样本表明，主题通过两种不同的连接类别串在一起：紧密或松散。松散的连接允许在各再现之间有相当大的时间变化。即使在获得类似图案的共同辅导的鸟类中，我们也观察到歌曲发作的节奏和时间可塑性存在强烈的个体差异。这些发现表明，声音的灵活性可能会使个体通过他们的歌曲表达各种行为状态，即使在只唱单一刻板主题的物种中也是如此。
The proliferation of birdsong research into the neural mechanisms of vocal learning is indebted to the remarkable stereotypy of the zebra finch's song motif. Motifs are composed of several syllables, which birds learn to produce in a fixed order. But at a higher level of organization-the-bout-zebra finch song is no longer stereotyped. Song bouts include several repetitions of the motif, which are often linked by a variable number of short "connector" vocalizations. In this conceptual methods paper, we show that combinatorial analysis alone yields an incomplete description of this bout-level structure. In contrast, studying birdsong as a time-varying analog signal can reveal patterns of flexibility in the rhythmic organization of song bouts. Visualizing large song-samples in sorted raster plots shows that motifs are strung together via two distinct categories of connections: tight or loose. Loose connections allow considerable timing variation across renditions. Even among co-tutored birds that acquired similar motifs, we observe strong individual variability in rhythms and temporal plasticity of song bouts. These findings suggest that vocal flexibility could potentially allow individuals to express a variety of behavioral states through their songs, even in species that sing only a single stereotyped motif.