大型沈下式人工プラント周辺の魚類映像 Studies on the School Behavior of Fish Around a Submerged Artificial Plant

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To make broad use of underwater space for mariculture, a mid-layer floating "Artificial Sea Floor" structure was developed and placed at a depth of 40 meters in Funagoshi bay in Iwate Prefecture in February 1996. The structure was constructed of welded steel (36.4×20.0m) and floated seven meters below the ocean surface. An operational deck projected above surface at the center of the structure. Six months after the facility had been anchored, the dstribution of fish around the structure during the daytime and nighttime was investigated by echo sounder. <br>A weak stratified fish echo (TS -54.5--51.5dB) and cloud-like fish echo (TS -41--38dB) were identified. Weak stratified fish echoes were estimated to be pelagic animals and were not close to the facility. During the day, cloud-like fish echoes from juveniles of <i>Scomber japonicus</i> were distributed around the facility in small schools, and at night dispersed in the surface layer over entire survey area. The floating reef was concluded to act as a aggregation device for <i>Scomber japonicus</i> in the daytime.

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  • 日本水産学会誌  

    日本水産学会誌 64(6), 966-974, 1998-11-15 

    日本水産學會

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各種コード

  • NII論文ID(NAID)
    10004854515
  • NII書誌ID(NCID)
    AN00193422
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00215392
  • NDL 記事登録ID
    4605807
  • NDL 雑誌分類
    ZR26(科学技術--農林水産--水産)
  • NDL 請求記号
    Z18-345
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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