海洋音響学会誌
Online ISSN : 1881-6819
Print ISSN : 0916-5835
ISSN-L : 0916-5835
論文
Tracking Individual Fish in a Dense School with a Broadband Split-beam System
Masanori ITOIkuo MATSUOTomohito IMAIZUMITomonari AKAMATSUYong WANGYasushi NISHIMORI
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2014 年 41 巻 4 号 p. 169-182

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To track individual fish within a dense school, it is necessary to isolate the echoes from multiple individual fish and then estimate their positions accurately. The signals from a broadband split-beam system offer the advantage of high-range resolution for this purpose. The range resolution and localization accuracy of this system were investigated by measuring the echoes from spheres in a tank. A tracking method exploiting the high-range resolution of the broadband signal was proposed. Echoes from schools of Japanese anchovy were measured in the ocean. Individual fish in these schools were measured separately and tracked using the proposed method. The technique allowed for accurate tracking of individual fish within dense schools. The estimated tracks can help us to better understand fish behavior under the sea.

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© 2014 Marine Acoustics Society of Japan
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