The bengalese finch - A window on the behavioral neurobiology of birdsong syntax
The bengalese finch - A window on the behavioral neurobiology of birdsong syntax
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DOI：
10.1196/annals.1298.026
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发表时间：
2004-01-01
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影响因子：
--
通讯作者：
Okanoya, K
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文献类型：
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作者：
Okanoya, K
孟加拉雀Lonchura striata var.白腰龙蜥是一种野生物种的驯化品系，这种野生物种是东南亚的白腰龙蜥。孟加拉雀在日本已经驯化了240年。将它们的歌曲句法与它们的野生祖先进行比较，我们发现驯化的菌株具有高度复杂的、明显的有限状态句法的歌曲，而野生祖先唱非常定型的线性歌曲。为了研究歌曲复杂性的功能效用，我们比较了血清雌二醇水平，并测量了被复杂的“驯化”歌曲或简单的野生型歌曲刺激的雌鸟携带到巢中的筑巢材料的量。在复杂的歌曲刺激的女性的雌二醇水平显着较高，筑巢材料进行的量显着更大。然后，我们对歌曲系统进行了脑损伤，以确定负责这些歌曲行为差异的神经基质。在孟加拉雀病变的NIf，高阶歌曲控制核，导致简化复杂的歌曲语法。也就是说，复杂的“驯化”句法变成了简单的野生型句法。基于这些数据，我们假设，突变的歌曲控制核已经发生，使复杂的歌曲语法，并成为固定到人口的驯化孟加拉雀通过间接性选择的过程。
The Bengalese finch Lonchura striata var. domestica is a domesticated strain of a wild species, the white-rumped munia Lonchura striata of Southeast Asia. Bengalese finches have been domesticated in Japan for 240 years. Comparing their song syntax with that of their wild ancestors, we found that the domesticated strain has highly complex, conspicuous songs with finite-state syntax, while the wild ancestor sang very stereotyped linear songs. To examine the functional utility of the song complexity, we compared serum levels of estradiol and measured the amount of nesting materials carried into the nest by female birds that were stimulated with either the complex "domesticated" song or the simple wild-type song. In the females stimulated with complex songs the estradiol levels were significantly higher and the amount of nesting material carried was significantly greater. We then performed brain lesions in the song system to identify the neural substrates that are responsible for these differences in song behavior. In Bengalese finches lesions of NIf, a higher order song control nucleus, resulted in simplification of the complex song syntax. That is, the complex "domesticated" syntax changed into the simple wild-type syntax. Based on these data, we hypothesize that mutations in the song control nuclei have occurred that enabled complex song syntax and became fixed into the population of domesticated Bengalese finches through a process of indirect sexual selection.