音響カメラを用いた大型クラゲ類（エチゼンクラゲ，ビゼンクラゲ，ミズクラゲ）の分布および傘径計測手法

DOI 日本農学文献記事索引 Web Site
  • 本多 直人
    国立研究開発法人水産研究・教育機構日本海区水産研究所
  • 豊川 雅哉
    国立研究開発法人水産研究・教育機構西海区水産研究所
  • 清水 学
    国立研究開発法人水産研究・教育機構本部
  • 藤井 直紀
    佐賀大学低平地沿岸海域研究センター
  • 藤田 薫
    国立研究開発法人水産研究・教育機構水産工学研究所

書誌事項

タイトル別名
  • Research Methods for Distribution and Size Measuring of Large Jellyfishes （Nemopilema Nomurai, Rhopilema Esculentum and Aurelia Aurita s.l.） by Using Acoustic Camera
  • オンキョウ カメラ オ モチイタ オオガタ クラゲルイ(エチゼンクラゲ,ビゼンクラゲ,ミズクラゲ)ノ ブンプ オヨビ カサケイ ケイソク シュホウ

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抄録

In order to observe three species of large jellyfishes Nemopilema nomurai, Rhopilema esculentum and Aurelia aurita s.l. which live in the sea around the Japan, the acoustic camera DIDSON was applied. Effective observation methods using acoustic camera for each species were discussed. Acoustic frequency of 1.1 MHz, 20 m-visibility and vertically downward observation was effective setting for N. nomurai that was distributed in the deep offshore water. Acoustic frequency of 1.8 MHz, 10 m-visibility and vertically downward observation from the sea surface was effective setting for R. esculentum that was distributed in the shallow coastal water. Acoustic frequency of 1.8 MHz, 5 m-visibility and horizontal observation was effective setting for Aurelia that was distributed in the coastal water. Experimental surveys using above settings were carried out by research ships and fishing boat. Individuals of each jellyfish could be visualized clearly on the pictures of the acoustic camera, and data of population density, bell size and swimming direction of each jellyfish were acquired.

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