まき網練習船の旋回圏の測定に関する研究 A Case Study of Measurement of a Turning Circle of a Purse Seine Training Ship

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Abstract

米国式カツオ・マグロまき網操業においては,魚群行動を予測し,短時間で魚群を包囲しなければならず,また,まき網の長さ(鶴洋丸では1350m)も決まっているため,自船の速力と舵角に対応する旋回圏の大きさや,旋回所要時間を把握しておく必要がある。著者らは,米国式カツオ・マグロまき網操業装備を擬し,単船操業ができる長崎大学水産学部漁業練習船鶴洋丸の旋回圏の測定を GPSを用いて行った。その結果, 3種類の各速力,各舵角での左右旋回時の旋回圏の大きさを測定できた。鶴洋丸においては,速力と舵角によって旋回所要時間に差はあるものの,舵角15度以上であれば,ほぼ網の長さに対応する直径の範囲内で旋回することが可能であった。

We have to estimate an action of a schooI of fish and must surround a schooI of fish in a short time withAmerican-type bonito-tuna purse sine operation. The net length of a purse seine of the Kakuyo-maru whichbelongs to the Faculty of Fisheries at Nagasaki University is decided. It is necessary to grasp it for size of thetuming circle that corresponds to a speed and a rudder angle, and for necessary time.By means of GPS, we measured a tuming circle of the fishery training ship Kakuyo-maru that has Americantypebonito-tuna purse seine operation equipment and can operate with a mono-ship. In result, we were able tomeasure the size of each tuming circle around a right and a left tuming at three kinds of speed and rudder angle.The necessary tuming times of the Kakuyo-maru differs by speed and rudder angle. However, if rudder angle ismore than 15 degrees, the size of tuming circle of Kakuyo-maru was able to confirm that, inside the limit of asize of a circle that corresponds to a length of a purse seine net.

Journal

  • Journal of Fisheries Engineering

    Journal of Fisheries Engineering 34(3), 247-256, 1998-03-01

    The Japanese Society of Fisheries Engineering

References:  10

Codes

  • NII Article ID (NAID)
    10008274636
  • NII NACSIS-CAT ID (NCID)
    AN10278554
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09167617
  • NDL Article ID
    4474799
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-1327
  • Data Source
    CJP  NDL  J-STAGE  JASI 
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