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Development of the silver-white decoy for squid automatic jigging machine and fishing performance

오징어채낚기용 은백색 유인체 개발과 어획성능

  • An, Young-Il (Dept. of marine police and Technology, Gangwon Provincial College) ;
  • Jang, Ung-Jeong (Dept. of marine police and Technology, Gangwon Provincial College)
  • 안영일 (강원도립대학 해양경찰과) ;
  • 장웅정 (강원도립대학 해양경찰과)
  • Received : 2013.07.19
  • Accepted : 2013.08.12
  • Published : 2013.08.31

Abstract

Decoys for automatic jigging machines, the body part of a squid hook, have been developed in small and existing sizes in consideration of squid food, color blindness, and retinomotor responses and in utilization of pearl pigment, PP of high transparency, and combined mixture. In comparison of the developed silver-white decoy and existing decoys, the optical characteristics were examined, and the fishing performance of small size silver-white squid hooks was assessed in application of 4 fishing boats with the squid automatic jigging machine and metal halide fishing lamp in July, 2012. The luminances of the three squid hook colors-green, dark green and silver-white-increased as the intensity of illumination increased. Among these, the increase of silver-white was particularly distinguished. As to the average contrast of squid hooks, that of silver-white was 10.33, which was the highest, and then green 1.86 and dark green -0.10 in the order. As to the fishing performance of the silver-white hook, that of the 202 Geumyeong-ho and 101Yongjin-ho which caught squids were similar to that of the existing green hook and was relatively low in the case of the Dongbu-ho. However, that of the Haengbok-ho which caught relatively small squids whose average length was 19.9cm and installed silver-white hook in all automatic jigging machines was significantly excellent. In order to enhance the fishing performance of small size silver-white hooks, therefore, it would be effective to install in every automatic jigging machines of fishing boat and to start fishing before July by which small squids are caught.

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