VOCAL ONTOGENY OF CHUCK CALL IN SQUIRREL MONKEYS II PERCEPTION

学习对声乐发展的意义 在松鼠猴中的感知，那么这将代表一种 灵长类声音发育与人类的重要相似之处 语言的发展，并可能提供一个重要的非人类灵长类 研究人类儿童语言发展的模型。目标 我们对四个不同年龄段的受试者进行了实验， 在受控条件下，对查克的叫声 不同社会亲缘关系的互不相关的人。使用回放 实验中，我们检验了受试者在不同的时间 发育阶段优先对查克的叫声作出反应 社交关系密切但不相关的同伴相比 来自社会团体内部或外部的其他个人。 结果亚成体的行为反应 优先于亲近伙伴的叫声，而不是婴儿， 青少年，而成年人则不是。青少年的行为反应更多 对来自个人的Chuck呼叫的回放非常强烈 当与《沉默》的回放相比时，它们在蜂群里。这些 结果表明，学习在Chuck Call中起着作用 在松鼠猴身上的识别，并提示婴儿逐渐 学会在他们的群体中从声音上识别社交伙伴。 未来的方向需要进一步的研究来确定何时 发声识别的出现以及性别差异是否 在松鼠猴子的查克识别系统中发现的 婴儿、青少年和儿童的行为和声音反应 亚成体拒绝播放遗传上没有血缘关系的成年人的电话。 关键词：有声学习、语言发展、语言进化 生物声学分析资助NIH NRSA奖学金1-F32-HD07946

Significance If learning contributes to the development of vocal perception in the squirrel monkey, then this will represent an important parallel between primate vocal development and human language development and may provide an important nonhuman primate model for studying language development in human children. Objectives We experimentally exposed subjects of four different age classes, under controlled conditions, to the chuck calls of genetically unrelated individuals of different social affinities. Using playback experimentation, we tested the hypothesis that subjects at different developmental stages respond preferentially to the chuck calls of socially close but unrelated companions when compared to those of other individuals either from within or outside of the social group. Results Results demonstrated that subadults behaviorally respond preferentially to the chuck calls of close associates but infants, juveniles, and adults do not. Juveniles behaviorally responded more strongly to the playback of chuck calls arising from individuals within their colony when compared to the playback of "silence." These results demonstrate that learning plays a role in chuck call recognition in squirrel monkeys and suggest that infants gradually learn to recognize social companions vocally within their groups. Future Directions Further research is needed to determine when in development vocal recognition emerges and whether a sex difference is found in the chuck recognition system in squirrel monkeys by examining both behavioral and vocal responses from infants, juveniles, and subadults to chuck call playback from genetically unrelated adults. KEY WORDS vocal learning, language development, evolution of language, bioacoustic analysis FUNDING NIH NRSA Fellowship 1-F32-HD07946