Mechanical Characteristics of Improved Jigs to Prevent Squid Falling Off in the Capturing Process

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  • Guo Haibo
    Department of Marine Science and Technology, Tokyo University of Fisheries
  • Yada Sadami
    Department of Marine Science and Technology, Tokyo University of Fisheries
  • Toda Masayoshi
    Department of Marine Science and Technology, Tokyo University of Fisheries
  • Inada Hiroshi
    Department of Marine Science and Technology, Tokyo University of Fisheries

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Other Title
  • Mechanical Characteristics of Improved

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Abstract

To allure squids and prevent them from falling off from jigs, two new kinds of jigs were devised, the impeller-jig and the roller-jig. In the former, the velocity of water flow before the impeller installed in the lure case of the jig was proportional to the diameter of the opening holes on the lure case under a constant winding velocity of 0.6m/s and 1.0m/s. For the latter, the revolution of the roller set at the top of the jig was also proportional to winding velocity, and the roller turned faster at the groove helix angle of 30° than that of 20° and 45°. The results showed that the new jigs were useful and effective to allure the target squid and hold them firmly with the visual stimulation of the rotating parts.

Journal

  • Fisheries science

    Fisheries science 63 (1), 9-14, 1997

    The Japanese Society of Fisheries Science

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