Development of wide-area and long-term tracking system for skipjack tuna <i>Katsuwonus pelamis</i> around FADs

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Other Title
  • 浮魚礁周辺のカツオ<i>Katsuwonus pelamis</i>を対象とした広域および長期追跡システムの開発
  • 浮魚礁周辺のカツオKatsuwonus pelamisを対象とした広域および長期追跡システムの開発
  • ウキギョショウ シュウヘン ノ カツオ Katsuwonus pelamis オ タイショウ ト シタ コウイキ オヨビ チョウキ ツイセキ システム ノ カイハツ

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Abstract

<p>　Skipjack tuna Katsuwonus pelamis is known to aggregate around fish aggregating devices (FADs), and many ultrasonic biotelemetry investigations have been conducted around FADs. However, the investigation areas have been limited to the area around surface type FADs where receivers can be installed, and adequate tracking cannot be achieved. To clarify the behavioral ecology of skipjack in more detail, it is necessary to carry out extensive and long-term observations. We have developed a fishing boat-mounted receiving system that combines an ultrasonic biotelemetry receiving system and a data communication terminal. The developed system was installed on a fishing boat that operated around FADs in waters around Yonaguni Island, Okinawa, Japan, located in the upper Kuroshio Current. The effectiveness of behavioral investigation of skipjack around FADs was verified. As a result, we were able to expand the tracking area and received the locations of individuals by GPS and successfully tracked them for long periods. Furthermore, data were collected in an efficient manner by using an information and communication technology (ICT) network as a data acquisition method.</p>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 87 (2), 108-116, 2021-03-15

    The Japanese Society of Fisheries Science

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