VOCAL ONTOGENY OF CHUCK CALL IN SQUIRREL MONKEYS II PERCEPTION

松鼠猴 II 感知中查克呼叫的声音本体发育

• 批准号: 6277874
• 负责人: Brenda McCowan
• 金额: $ 5.82万
• 依托单位: UNIVERSITY OF CALIFORNIA AT DAVIS
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 1999-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6277874
• 关键词: Mammalia; Primates; cognition; communication behavior; psychology; sociology /anthropology

Significance If learning contributes to the development of vocal perception in the squirrelmonkey, 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. KEYWORDS vocal learning, language development, evolution of language, bioacoustic analysis

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