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Fluorescent characteristics of baits and bait cages for swimming crab Portunus trituberculatus pots

꽃게 통발용 미끼 및 미끼통의 형광 특성

  • Chang, Ho-Young (Marine Science & Production Major, Kunsan National University) ;
  • Koo, Jae-Geun (Food Science & Biotechnology Major, Kunsan National University) ;
  • Lee, Keun-Woo (Food Science & Biotechnology Major, Kunsan National University) ;
  • Cho, Bong-Kon (Marine Science & Production Major, Kunsan National University) ;
  • Jeong, Byung-Gon (Environmental Engineering Major, Kunsan National University)
  • 장호영 (군산대학교 해양생산학) ;
  • 구재근 (군산대학교 식품생명공학) ;
  • 이근우 (군산대학교 식품생명공학) ;
  • 조봉곤 (군산대학교 해양생산학) ;
  • 정병곤 (군산대학교 환경공학)
  • Published : 2008.08.29

Abstract

In order to develop the substitutive materials for natural baits of swimming crab pots, the fluorescent characteristics of the baits were analyzed, and the preference of fluorescent dyes were investigated by the mean entrapped catch number to the pots through the water tank experiments and fishing experiments. On the investigation of fluorescent characteristics by the 5 kinds of baits, mackerel, krill, manila clam, pig's fat and chicken's head which were used in substitutive baits for test in the UV long wave(365nm) area, it showed clear blue fluorescence in the skin of mackerel, shell of krill, manila clam and bill of chicken's head, and green fluorescence in the mackerel s muscle and internals, and yellow fluorescence in the pig's fat and chicken's head. On the investigation of fluorescent characteristics by the bait cages in the UV short wave(254nm) and long wave(365nm) area, it showed each green, red and blue fluorescence in the cylinderical or hexahedral red plastic bait cages which were painted each green, red and blue fluorescence dyes, but it showed yellowish green flourescence in the cylinderical or hexahedral red plastic bait cage which was painted yellow fluorescent dye. On the preference investigation of the fluorescent dyes of swimming crabs by the 5 kinds of the bait cages which were put the mackerel in the non-fluorescent red plastic cage($RF_N$), red, yellow, green and blue fluorescent plastic cages(RF, YF, GF, BF) each, nonfluorescent red plastic cage($RF_N$) was entrapped mean 2.0(6.7%), but blue fluorescent plastic cage(BF) was mean 5.0(16.7%) and it was more 2.5 times comparing to $RF_N$, and red fluorescent cage(RF) was same level and green fluorescent cage(GF) was 50% of catch number comparing to $RF_N$, and yellow fluorescent cage(YF) was entrapped nothing(F 46.324, P < 0.05). On the investigation of the entrapped catch number to the pots which were put the mackerel in the blue fluorescent hexahedral plastic cage(HP) and blue fluorescent silicon mackerel model cage(SM), HP was mean 3.4(11.3%) and it was a little more comparing to SM which was entrapped mean 3.2(10.7%)(t 0.775, P > 0.05). Fishing experiments on the preference investigation of swimming crabs by the pots which were put in the non-fluorescent red plastic cage($RF_N$) and blue fluorescent plastic cage(BF) were conducted 3 times. Mean catching number and weight of $RF_N$ were 71.7 ind.(18.3%) and 16.9kg(64.3%), and those of BF were 93.0 ind.(23.1%) and 19.8kg(64.5%), respectively.

Keywords

Fluorescent characteristics;Swimming crab pots;Baits;Bait cage;Fishing experiments

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