New Stereo Acoustic Data Logger for Free-ranging Dolphins and Porpoises
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- Akamatsu Tomonari
- National Research Institute of Fislieries Engineering, Fisheries Research Agency
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- Matsuda Akihiko
- National Research Institute of Fislieries Engineering, Fisheries Research Agency
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- Suzuki Shiro
- National Research Institute of Fislieries Engineering, Fisheries Research Agency
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- Wang Ding
- Institute of Hydrobiology, the Chinese Academy of Sciences
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- Wang Kexiong
- Institute of Hydrobiology, the Chinese Academy of Sciences
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- Suzuki Michihiko
- Little Leonardo Inc.
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- Muramoto Hiroyuki
- Marine Micro Technology Inc.
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- Sugiyama Naoki
- Suruga DenshiCo. Ltd.
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- Oota Katsunori
- Intertec Co. Ltd.
Bibliographic Information
- Other Title
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- 自由遊泳するイルカに装着するための新しい音響データロガー
- ジユウ ユウエイ スル イルカ ニ ソウチャク スル タメ ノ アタラシイ オンキョウ データロガー
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Abstract
To observe the bio-sonar behavior of dolphins and porpoises, a miniature stereo acoustic data logger was developed to record the echolocation clicks of small cetaceans. The 'A-tag' device is small enough to be attached to a dolphin or porpoise. A-tag can record the sonar pulse intensity, precise inter-click-intervals, and time difference between sounds arriving at two different hydrophones. The A-tag works for up to 60 hours continuously and allows observation of the sonar target range of free-ranging odontocetes. The time of arrival at the two hydrophones on the tag allows vocalizations from nearby individuals to be identified. A less invasive tagging technique using a suction cup was also developed. A mean attachment time of 15 hours was obtained on freeranging Unless porpoises in a freshwater system in China. The A-tag proved to be a useful tool for investigating the underwater echolocation behavior of odontocetes.
Journal
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- Journal of Advanced Marine Science and Technology Society
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Journal of Advanced Marine Science and Technology Society 11 (2), 65-71, 2005
Advanced Marine Science and Technology Society
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Keywords
Details 詳細情報について
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- CRID
- 1390564238076626048
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- NII Article ID
- 130007592735
- 10017678006
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- NII Book ID
- AA11607434
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- ISSN
- 21883262
- 13412752
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- NDL BIB ID
- 8537806
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed