Acoustic features of male baboon loud calls: Influences of context, age, and individuality
Acoustic features of male baboon loud calls: Influences of context, age, and individuality
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DOI：
10.1121/1.1433807
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发表时间：
2002-03-01
影响因子：
2.4
通讯作者：
Seyfarth, RM
中科院分区：
文献类型：
--
作者：
Fischer, J;Hammerschmidt, K;Seyfarth, RM
对博茨瓦纳莫雷米猎物保护区内自由放养的雄性狒狒(Papio Cynocephalus Ursinus)的大声叫声(“wahoos”)的声学结构进行了研究，以找出环境之间和环境内的差异，使用的是响应捕食者发出的叫声(警报叫声)、在雄性比赛期间发出的叫声(竞争叫声)以及当雄性与群体分离时发出的叫声(接触叫声)。来自青少年、亚成人和成年男性的电话被录音。此外，男性的警报声与女性的警报声进行了比较。尽管它们表面上的声学相似，但分析揭示了警报、竞争和接触叫声之间的一些显著差异。竞争叫声的频率要高得多，表现出较低的频率特征，具有较长的“呼”持续时间，并且比警报叫声有相对较大的“呼”声部分。接触叫声在声学上类似于竞赛叫声，但发出的频率要低得多，警报和竞赛叫声也显示出个体之间的显著差异。一些与年龄和性别有关的声学特征可能反映了身体大小的差异，而另一些可能与男性的耐力和耐力有关。这一发现表明，非人类灵长类动物的发声能力在进化上受到限制。(C)2002年美国声学学会。
The acoustic structure of loud calls ("wahoos") recorded from free-ranging male baboons (Papio cynocephalus ursinus) in the Moremi Game Reserve, Botswana, was examined for differences between and within contexts, using calls given in response to predators (alarm wahoos), during male contests (contest wahoos), and when a male had become separated from the group (contact wahoos). Calls were recorded from adolescent, subadult, and adult males. In addition, male alarm calls were compared with those recorded from females. Despite their superficial acoustic similarity, the analysis revealed a number of significant differences between alarm, contest, and contact wahoos. Contest wahoos are given at a much higher rate, exhibit lower frequency characteristics, have a longer "hoo" duration, and a relatively louder "hoo" portion than alarm wahoos. Contact wahoos are acoustically similar to contest wahoos, but are given at a much lower rate, Both alarm and contest wahoos also exhibit significant differences among individuals. Some of the acoustic features that vary in relation to age and sex presumably reflect differences in body size, whereas others are possibly related to male stamina and endurance. The finding that calls serving markedly different functions constitute variants of the same general call type suggests that the vocal production in nonhuman primates is evolutionarily constrained. (C) 2002 Acoustical Society of America.