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Songs of humpback whales Megaptera novaeangliae in the Ryukyu and Bonin regions.


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タイトル: Songs of humpback whales Megaptera novaeangliae in the Ryukyu and Bonin regions.
著者: Maeda, Hidemasa / Higashi, Naoto / Uchida, Senzou / Sato, Fumihiko / Yamaguchi, Manami / Koido, Takashi / Takemura, Akira
発行日: 2000年
出版者: The Mammalogical Society of Japan
引用: Mammal Study, 25(1), pp.59-73; 2000
抄録: Changes in the songs of humpback whales Megaptera novaeangliae in the Ryukyu and Bonin regions of Japan were examined, and songs from the two regions were compared. Eighty-four song sessions in the Ryukyu region, from 1991 to 1997, and eleven song sessions in the Bonin region, from 1992 to 1995, were analyzed. The mean number of theme types was 6.9 for the Ryukyu samples and 7.6 for the Bonin samples. Song similarities were higher within winter than between winters and similarity declined as the number of intervening years increased, indicating that in these regions songs change with time. Song similarities for consecutive years varied, suggesting that the rate of change varies annually. Songs in the same year were very similar in both the Ryukyu and Bonin samples, furthermore site-specific theme types were not found. These results suggest there may be acoustic contact between animals using the two regions, supporting a previous photographic study which indicated that humpback whales migrate between these two regions.
キーワード: acoustic contact / Megaptera novaeangliae / migration / song similarity
URI: http://hdl.handle.net/10069/20147
ISSN: 13434152
DOI: 10.3106/mammalstudy.25.59
権利: Copyright (c) 2005 The Mammalogical Society of Japan
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:090 学術雑誌論文

引用URI : http://hdl.handle.net/10069/20147

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