定置網周辺における魚群の規模と移動状況

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タイトル別名
  • Behaviour of fish school in set-net fishing ground. VIII. Size and moving behaviour of fish schools around the set-net.
  • 定置網漁場における魚群行動に関する研究　ＶＩＩＩ　　定置網周辺における魚群の規模と移動状況
  • テイチアミ シュウヘン ニ オケル ギョグン ノ キボ ト イドウ ジョウキョ

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The behaviour of fish schools concerning the set-net was investigated in eleven fishing grounds around Japan using a scanning sonar. Taking the fish school's horizontal section as ellipse-shaped, they measured 37m in length and 15m in width except for a few larger sized schools. The mouths of set-nets were almost large enough for the fish schools to enter.<br> The speeds of fish schools were measured around the set-nets for the six different species. Many fish schools moved slowly at 15-23cm/sec around them. No specific differences in speed could be observed, although Chum salmon were 4 times larger in body length than sardines. How-ever in the area off the set-net, they tended to move faster than in the area near coast. The speed varied depending on the area.

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  • 日本水産学会誌

    日本水産学会誌 53 (8), 1307-1312, 1987

    公益社団法人 日本水産学会

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