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Recurrent development of song idiosyncrasy without auditory inputs in the canary, an open-ended vocal learner

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Title: Recurrent development of song idiosyncrasy without auditory inputs in the canary, an open-ended vocal learner
Authors: Mori, Chihiro Browse this author
Liu, Wan-chun Browse this author
Wada, Kazuhiro Browse this author →KAKEN DB
Keywords: Animal behaviour
Issue Date: 7-Jun-2018
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 8
Start Page: 8732
Publisher DOI: 10.1038/s41598-018-27046-4
Abstract: Complex learned behaviors, like bird song and human speech, develop under the influence of both genetic and environmental factors. Accordingly, learned behaviors comprise species specificity and individual variability. Auditory information plays a critical role in vocal learning by songbirds, both to memorize tutor songs and to monitor own vocalizations. Nevertheless, audition-deprived songbirds develop structured, species-specific song patterns. It remains to be elucidated how the auditory input contributes to the development of individual variability of song characteristics. Here we show that an open-ended vocal learner, the canary, annually recapitulates individually unique songs without audition. Although the total number of syllable types was reduced by auditory deprivation, other vocal phenotypes examined in the syllable, phrase, and syntax of songs were conserved between the 1st and 2nd years, both in deafened and intact birds. In deafened canaries, approximately 60% of the syllables were yearly reproduced with consistent acoustic features, whereas the remaining syllables were replaced with new ones in an annual cycle of song development. These results indicate that the openended vocal learning of canaries involves an audition-independent mechanism for the development of recurrent song idiosyncrasy.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 和多 和宏

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