Cortical Systems and Behavior Laboratory, Department of Psychology, University of California, 9500 Gilman Dr. #0109, La Jolla, San Diego, CA 92093, USA.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2012 May;198(5):337-46. doi: 10.1007/s00359-012-0712-7. Epub 2012 Jan 26.
Many vocalizations are encoded with a diversity of acoustic information about the signal producer. Amongst this information content are social categories related to the identity of the caller that are important for determining if and how a signal receiver may interact with that individual. Here, we employed a novel playback method in common marmosets (Callithrix jacchus) to test individual recognition during bouts of antiphonal calling. These experiments utilized custom, interactive playback software that effectively engaged subjects in antiphonal calling using vocalizations produced by a single individual and presented 'probe' vocalization stimuli representing a different individual at specific points within bouts of calling. The aim here was to test whether marmosets would recognize that the probe stimulus was a phee call produced by a different individual. Data indicated that marmosets were able to detect the change in caller identity; subjects produced significantly fewer antiphonal call responses to probe than control stimuli and, in some conditions, exhibited a shorter latency to produce the vocal response. These data suggest that marmosets recognize the identity of the individual during bouts of antiphonal calling. Furthermore, these results provide a methodological foundation for implementing the probe playback procedure to examine a broader range of social categorization during vocal interactions.
许多发声都包含了与信号产生者身份相关的各种声学信息。在这些信息内容中，与呼叫者身份相关的社会类别对于确定信号接收者是否以及如何与该个体进行交互非常重要。在这里，我们在普通狨猴（Callithrix jacchus）中采用了一种新颖的回放方法，以测试在对呼叫声中个体识别。这些实验使用了定制的交互式回放软件，该软件通过使用单个个体产生的发声来有效地使对象参与对呼，并且在对呼叫声的特定点处呈现代表不同个体的“探针”发声刺激。这里的目的是测试狨猴是否能够识别探针刺激是来自不同个体的 Phee 叫声。数据表明，狨猴能够检测到呼叫者身份的变化；与对照刺激相比，对象对探针的对呼响应明显减少，并且在某些条件下，产生发声响应的潜伏期较短。这些数据表明，狨猴在对呼叫声中识别个体的身份。此外，这些结果为实施探针回放程序提供了方法学基础，以在发声相互作用期间检查更广泛的社会分类。
