Simultaneous identification of multiple signals from phase modulation-coded transmitters for acoustic biotelemetry of fish school

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  • Takagi Junichi
    Graduate School of Informatics, Kyoto University
  • Ichikawa Kotaro
    Field Science Education and Research Center, Kyoto University CREST, Japan Science and Technology Agency
  • Arai Nobuaki
    Field Science Education and Research Center, Kyoto University CREST, Japan Science and Technology Agency
  • Miyamoto Yoshinori
    CREST, Japan Science and Technology Agency Tokyo University of Marine Science and Technology
  • Uchida Keiichi
    CREST, Japan Science and Technology Agency Tokyo University of Marine Science and Technology
  • Fujioka Ko
    National Research Institute of Far Seas Fisheries, Fisheries Research and Education Agency
  • Fukuda Hiromu
    National Research Institute of Far Seas Fisheries, Fisheries Research and Education Agency
  • Shoji Jun
    Center for Field Science of the Seto Inland Sea, Hiroshima University
  • Mitamura Hiromichi
    Graduate School of Informatics, Kyoto University CREST, Japan Science and Technology Agency

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  • 超音波バイオテレメトリーを用いた魚類の群れ行動観測に向けた位相変調方式コード化ピンガーの複数同時識別

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Abstract

<p>Multiple signals must be identified from different fish simultaneously to observe group behavior using acoustic biotelemetry. We demonstrated simultaneous identification of multiple signals using a new phase modulation-coded telemetry system. We deployed eight transmitters with a 1.28-s signal transmitting interval at the same location, and two receivers that were 18.5 m and 38.0 m away from the transmitters. The detection rates of the two receivers during 15 min of recording were 77.0% and 73.0%. These results show that multiple signals from several transmitters were detected simultaneously by the receivers and were discriminated at high resolution (<2 s). This new telemetry system will be useful in studies on fish schooling behavior, aggregation, and predator-prey interactions.</p>

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