Dialects in Pygmy Marmosets? Population Variation in Call Structure
Dialects in Pygmy Marmosets? Population Variation in Call Structure
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DOI：
10.1002/ajp.20657
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发表时间：
2009-04-01
影响因子：
2.4
通讯作者：
Snowdon, Charles T.
中科院分区：
文献类型：
--
作者：
de la Torre, Stella;Snowdon, Charles T.
灵长类动物声音结构的群体变异很少被观察到。在这里，我们报告了野生侏儒狨猴两种发声结构（颤音和 J 叫声）的显着种群差异。我们研究了来自厄瓜多尔东北部 5 个种群的 14 组侏儒狨猴 Callithrix (Cebuella) pygmaea pygmaea。我们通过焦点样本分析了每组两只成年动物记录的颤音和 J 叫声的声学结构。尽管种群内的个体和群体在叫声结构上有所不同，但我们发现 Trills 和 J 叫声在种群水平上存在一致的结构差异。对两种叫声类型的成对比较表明，San Pablo 和 Amazoonico 是差异最大的种群，而 Hormiga 和 Zancudococha 的差异最小。判别函数分析表明，来自每个群体的呼叫可以以显着高于概率的速率被准确分类。栖息地声学、社会因素和遗传漂变可以解释种群间声音差异。这是新热带灵长类野生种群中亚种内部声音差异或方言的第一个证据。是。 J.普里马托尔。 71:333-342, 2009。(C) 2009 Wiley-Liss, Inc.
Population variation in primate vocal structure has been rarely observed. Here, we report significant population differences in the structure of two vocalizations in wild pygmy marmosets (Trills and J calls). We studied 14 groups of pygmy marmosets Callithrix (Cebuella) pygmaea pygmaea from five populations in northeastern Ecuador. We analyzed the acoustic structure of Trills and J calls recorded from two adult animals in each group through focal samples. Although individuals and groups within a population differed in call structure, we found consistent structural differences at a population level for Trills and J calls. Pair-wise comparisons for the two call types point to San Pablo and Amazoonico as the populations that differed the most, whereas Hormiga and Zancudococha showed the least differences. Discriminant function analysis indicates that calls from each population could be classified accurately at rates significantly above chance. Habitat acoustics, social factors and genetic drift may explain interpopulation vocal differences. This is the first evidence of within-sub species vocal differences, or dialects, in wild populations of a neotropical primate species. Am. J. Primatol. 71:333-342, 2009. (C) 2009 Wiley-Liss, Inc.