The effect of habitat acoustics on common marmoset vocal signal transmission.
The effect of habitat acoustics on common marmoset vocal signal transmission.
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DOI：
10.1002/ajp.22152
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发表时间：
2013-09
影响因子：
2.4
通讯作者：
Miller, Cory T.
中科院分区：
文献类型：
--
作者：
Morrill, Ryan J.;Thomas, A. Wren;Schiel, Nicola;Souto, Antonio;Miller, Cory T.
噪声环境对声通信系统的发展提出了若干挑战。其中最重要的是需要限制频谱-时间信号结构的退化，以保持通信效率。这可以通过选择几个潜在的互补过程来实现。选择可以作用于行为机制，允许信号发布者控制信号产生的时间和发生，以避免声干扰。同样，信号本身可能是选择的目标，使其结构的演变偏向于包含避免环境噪声干扰或在栖息地中最小程度退化的声学特征。在这里，我们讨论后一个主题的常见狨猴（Callithrix jacchus）长距离接触发声，被称为phee呼叫。我们的目的是测试这种发声是否特别适合在一个物种典型的森林栖息地传播，巴西东北部的大西洋森林。我们将环境栖息地声学的季节性分析与实验相结合，在实验中，纯音、咔嚓声和发声在不同距离播放并重新录制，以表征栖息地信号退化的特征。分析了全天、雨季和旱季的环境声音，显示了不同时间尺度上的时间规律。广播实验结果表明，音调和咔哒声刺激频率与信号效能呈典型的反比关系。尽管与人造声音相比，狨猴的叫声会随着距离的推移而退化，而且具有明显的可预测性，但在这个栖息地，它们似乎并不是专门为提高传播效率或减少干扰而设计的。我们在其他类似研究和潜在行为机制的背景下讨论这些数据，以避免声音干扰，以维持普通狨猴有效的声音交流。
Noisy acoustic environments present several challenges for the evolution of acoustic communication systems. Among the most significant is the need to limit degradation of spectro-temporal signal structure in order to maintain communicative efficacy. This can be achieved by selecting for several potentially complementary processes. Selection can act on behavioral mechanisms permitting signalers to control the timing and occurrence of signal production to avoid acoustic interference. Likewise, the signal itself may be the target of selection, biasing the evolution of its structure to comprise acoustic features that avoid interference from ambient noise or degrade minimally in the habitat. Here, we address the latter topic for common marmoset (Callithrix jacchus) long-distance contact vocalizations, known as phee calls. Our aim was to test whether this vocalization is specifically adapted for transmission in a species-typical forest habitat, the Atlantic forests of northeastern Brazil. We combined seasonal analyses of ambient habitat acoustics with experiments in which pure tones, clicks, and vocalizations were broadcast and rerecorded at different distances to characterize signal degradation in the habitat. Ambient sound was analyzed from intervals throughout the day and over rainy and dry seasons, showing temporal regularities across varied timescales. Broadcast experiment results indicated that the tone and click stimuli showed the typically inverse relationship between frequency and signaling efficacy. Although marmoset phee calls degraded over distance with marked predictability compared with artificial sounds, they did not otherwise appear to be specially designed for increased transmission efficacy or minimal interference in this habitat. We discuss these data in the context of other similar studies and evidence of potential behavioral mechanisms for avoiding acoustic interference in order to maintain effective vocal communication in common marmosets.
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影响因子：
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