Acoustical and syntactical comparisons between songs of the white-backed munia (Lonchura striata) and its domesticated strain, the Bengalese finch (Lonchura striata var. domestica)
Acoustical and syntactical comparisons between songs of the white-backed munia (Lonchura striata) and its domesticated strain, the Bengalese finch (Lonchura striata var. domestica)
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DOI：
10.2108/zsj.16.319
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发表时间：
1999-04-01
影响因子：
0.9
通讯作者：
Okanoya, K
中科院分区：
文献类型：
--
作者：
Honda, E;Okanoya, K
孟加拉雀是一种驯养的白背雀。驯化的过程开始于大约250年前的日本，并在颜色和行为上发生了一些变化。我们最近发现，孟加拉雀的歌声在时间组织上比斑马雀等相关物种的歌声复杂得多。我们假设这种复杂性发生在驯化过程中。为了探索这一假设，我们比较了野生和驯化菌株的白背斑鸠之间的歌曲的句法和声学参数。声形态的歌曲元素是应变特定的歌曲元素之间的相似性较高的个人内的每个应变，但程度的形态变化的应变之间是可比的。在时间域中，白背斑鸠唱着一首高度定型的歌：一个歌曲元素总是以确定性的方式跟随着某些歌曲元素之一。孟加拉雀，另一方面，唱复杂的歌曲与一个歌曲的音符，其次是几个可能的歌曲音符。雄性的歌声应该在两种不同的压力下进化：雌性的偏好和捕食的风险。在野生白背中发现的低程度的复杂性可能是补偿这两个因素的结果。在孟加拉雀中，由于驯化，捕食不再是选择压力。因此，很可能孟加拉雀的歌声经历了一些变化，这些变化受到了雌性雀的青睐。
The Bengalese finch is a domesticated strain of the white-backed munia. The process of domestication began some 250 years ago in Japan and several modifications in coloration and behavior occurred. We recently found that songs of Bengalese finches are much more complex in their temporal organizations than songs of related species such as zebra finches. We hypothesized that this complexity occurred during domestication. To explore this hypothesis, we compared syntactical and acoustical parameters of songs between the wild and domesticated strains of white-backed munia. Acoustical morphologies of the song elements were strain-specific similarities among song elements were higher within individuals of each strain, but the degrees of morphological variations were comparable between the strains. In the time domain, white-backed munias sang a highly stereotyped song: a song element was always followed by one of certain song elements in a deterministic way. Bengalese finches, on the other hand, sang complex song with one song note followed by several possible song notes. Male songs should evolve largely under two different pressures: female preference and risk of predation. The low degree of complexity found in wild white-backed munias may be the result of compensating these two factors. In Bengalese finches, because of the domestication, predation is no longer a selection pressure. Thus, it is likely that Bengalese finch songs had undergone changes that were favored by females.