1,000GT型漁業練習船のマグロ延縄操業における作業時間と乗組員の歩行速度にみられる漁具構造と海況の影響 Influence of Gear Construction and Surface Conditions on Length of Working Time and Walking Pace of Crew Members on Board a 1,000G. T. Fishery Training Vessel during Tuna Longlining

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Abstract

1997年6月,インド洋東部において行った10回のマグロ延縄操業の際に,投揚縄に要した時間及び各乗組員の歩行数(1時間当たりに換算)を記録し,それらと漁具構成に関する要因及び海況・風速との関係を調べ,次の結果が得られた: 1.作業時間の長さは漁具構成によって決まる。 2.揚縄時間の長さは幹縄の長さによって決まるが,深くに設置した縄を揚げるときには長く,右舷から風を受けたときには短くなる。 3.投縄及び揚縄作業に従事した乗組員の半数の歩行速度に関して,有意とみなせるか重柏関係数0.5以上の回帰式が1つか2つの説明変数を用いることによって得られる。 4.揚縄中の歩行速度を表示する有意とみなせる式の説明変数には海況・風速に関する説明変数が含まれる。 5.これらの式が示す傾向は我々の経験と一致する6.さらに明確な結果を得るためには,今後操業回数が多く,説明変数相互間の相関がみられにくい資料を用い分析しなければならない。

The time length of extending and retrieving work of 10 strings of tuna longline settled June, 1997 in theeastem part of the Indian Ocean by a stem ramp trawler type l,000 G.T. fishery training vessel and the walkingpace of crew members during these works were recorded. Their relation to the gear construction and the surfaceconditions was examined, and the following results were obtained : 1) The length of working time depended onthe gear construction. 2) It took a longer time to retrieve a deep-lying string, While it required a shorter timewhen the string was retrieved by the vessel facing a wind from starboard. 3) Equations, which could be regardedto be significant at 0.05 level or yielding the multiple correlation coefficient higher than 0.5 using 1 or 2 explanationvariables, could be obtained for the walking pace of more than a half of the members concemed. 4) Thesignificant equations for walking pace during retrieving work adopted the variables of surface conditions as theexplanation ones. 5) Suggested influence of the surface conditions from the present results coincided with ourexperience on board. 6) To reach a clear conclusion, further studies were found to be needed, using the recordsfor more strings, in which the probable explanation variables less frequently showed correlation to one another.

Journal

  • Journal of Fisheries Engineering

    Journal of Fisheries Engineering 35(2), 101-112, 1998-12-01

    The Japanese Society of Fisheries Engineering

References:  11

Codes

  • NII Article ID (NAID)
    10008274846
  • NII NACSIS-CAT ID (NCID)
    AN10278554
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    09167617
  • NDL Article ID
    971228
  • 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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