Vocal memes in natural populations of chickadees: why do some memes persist and others go extinct?

被引:14
作者
Baker, Myron C. [1 ,2 ]
Gammon, David E. [3 ]
机构
[1] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA
[2] Univ Western Australia, Sch Anim Biol, Nedlands, WA 6009, Australia
[3] Elon Univ, Dept Biol, Elon, NC 27244 USA
基金
美国国家科学基金会;
关键词
black-capped chickadee; bird; culture; evolution; meme; Poecile atricapillus; vocalization;
D O I
10.1016/j.anbehav.2007.05.022
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 [法学]; 0303 [社会学]; 030303 [人类学]; 04 [教育学]; 0402 [心理学];
摘要
We obtained data on a cultural trait from an 8-year study of a bird species, the black-capped chickadee, Poecile atricapillus. The trait is a nonsong vocalization, the gargle call, which exhibits variant acoustic forms (memes) in local populations. Some forms persisted in the local population throughout the study period as traditions transmitted with high fidelity (core memes) and others (failed memes) appeared only briefly, destined for quick extinction. We used our data to test a number of hypotheses concerning the question of why some memes persist as traditions, whereas others are short lived. We found that the persisting core memes were more widely shared among individuals, more frequently expressed, and acoustically different from failed memes. Carriers of core memes were older on average than those expressing failed memes, and similar in body size, but greater in mass, a possible indication of condition. We hypothesize that social selection for conformity to core gargle memes occurs in the context of the agonistic encounters where these vocal signals are used. (C) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:279 / 289
页数:11
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