De novo establishment of wild-type song culture in the zebra finch.
De novo establishment of wild-type song culture in the zebra finch.
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DOI：
10.1038/nature07994
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发表时间：
2009-05-28
期刊：
影响因子：
64.8
通讯作者：
Tchernichovski, Ofer
中科院分区：
文献类型：
--
作者：
Feher, Olga;Wang, Haibin;Saar, Sigal;Mitra, Partha P.;Tchernichovski, Ofer
在一个由天真的创始人组成的岛屿殖民地，会发展出什么样的文化？这个问题无法在人类身上进行实验研究。我们用社会习得的鸟鸣进行了类似的实验。文化通常被认为是通过社会学习由表观遗传的特征组成的。然而，文化多样性具有物种特有的制约因素，可能是遗传原因。一个著名的例子是，普遍语法是否限制了人类语言的句法多样性。鸣禽表现出歌曲学习，并提供了生物学上易于处理的文化模式：一个物种的成员在歌曲中表现出个体差异，地理上分离的群体有当地的歌曲方言。不同的物种表现出不同的歌曲文化，暗示遗传的限制。如果没有这样的限制，创新和复制错误应该会在多代人或地理距离上造成无限的变化，这与观察相反。我们问野生型的歌曲文化是否可能出现在一个孤立的殖民地建立隔离多代，如果是这样的话，这可能会发生，什么类型的社会环境是必需的。斑胸草雀隔离，未暴露于唱歌的男性在发展过程中，产生的歌曲与实验室或自然群体中发现的野生型歌曲不同的特点。在辅导血统从孤立的创始人，我们量化了两个社会环境中的辅导世代的歌曲的变化：导师学生对在隔音室和一个孤立的半自然的殖民地。在这两种情况下，青少年模仿孤立的导师，但改变了某些特征的歌曲。这些变化是经过一代又一代的学习积累起来的。因此，歌曲在3-4代中向野生型进化。因此，物种特有的歌文化可以重新出现。我们的研究与语言的变化和进化有相似之处。与数量遗传学中的模型类似，我们将歌曲文化建模为多代表型，部分编码在孤立的创始人群中，受环境变量的影响，并需要多代才能出现。
What sort of culture would evolve in an island colony of naive founders? This question cannot be studied experimentally in humans. We performed the analogous experiment using socially learned birdsong. Culture is typically viewed as consisting of traits inherited epigenetically, via social learning. However, cultural diversity has species-typical constraints, presumably of genetic origin. A celebrated, if contentious, example is whether a universal grammar constrains syntactic diversity in human languages. Oscine songbirds exhibit song learning and provide biologically tractable models of culture: members of a species show individual variation in song and geographically separated groups have local song dialects. Different species exhibit distinct song cultures, suggestive of genetic constraints. Absent such constraints, innovations and copying errors should cause unbounded variation over multiple generations or geographical distance, contrary to observations. We asked if wild-type song culture might emerge over multiple generations in an isolated colony founded by isolates, and if so, how this might happen and what type of social environment is required. Zebra finch isolates, unexposed to singing males during development, produce song with characteristics that differ from the wild-type song found in laboratory or natural colonies. In tutoring lineages starting from isolate founders, we quantified alterations in song across tutoring generations in two social environments: tutor-pupil pairs in sound-isolated chambers and an isolated semi-natural colony. In both settings, juveniles imitated the isolate tutors, but changed certain characteristics of the songs. These alterations accumulated over learning generations. Consequently, songs evolved toward the wild-type in 3–4 generations. Thus, species-typical song culture can appear de novo. Our study has parallels with language change and evolution. In analogy to models in quantitative genetics, we model song culture as a multi-generational phenotype, partly encoded genetically in an isolate founding population, influenced by environmental variables, and taking multiple generations to emerge.
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DOI：
10.1073/pnas.91.22.10498
发表时间：
1994-10-25
影响因子：
11.1
作者：
NELSON, DA;MARLER, P
通讯作者：
MARLER, P
影响因子：
2.4
作者：
Olofsson, Helen;Servedio, Maria R.
通讯作者：
Servedio, Maria R.
影响因子：
2.5
作者：
MARLER, P;SHERMAN, V
通讯作者：
SHERMAN, V
影响因子：
2.5
作者：
Soha, JA;Marler, P
通讯作者：
Marler, P
影响因子：
2.5
作者：
Tchernichovski, O;Nottebohm, F;Mitra, PP
通讯作者：
Mitra, PP