Effects of deafening on the temporal pattern of vocalizations in the budgerigarMelopsittacus undulatus |
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| Authors: | Hiroko Eda-Fujiwara Aiko Watanabe Hiroshi Okumura |
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| Institution: | (1) Department of Biology, Japan Women's University, Mejirodai, Bunkyo-ku, 112 Tokyo, Japan |
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| Abstract: | The physical characteristics of vocalization were examined in budgerigars (Melopsittacus undulatus) deafened at the age of about 28 days. Autocorrelation was used in the analysis, with 2 parameters: 1) inter-element intervals
and 2) amplitudes of all sound elements of the vocalization. The deafened birds developed the temporal pattern specific to
normal warble song in autocorrelograms. However, abnormalities were found in the frequency spectrum of elements. The temporal
pattern of warble song might be an innate character, because auditory feedback is unnecessary for its development. |
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