A Study on the Leading Effect of Fish Attracting Lamps on Fish Schools into a Set-net - The Leading Effect of Incandescent Electric Light on Fish Schools -

집어등에 의한 정치망에의 어군유도에 관한 연구 I . 백열등에 의한 어군의 유도효과

  • Park, Jeong-Sik (College of Ocean Sciences, Cheju National University) ;
  • Kim, Seok-Jong (College of Ocean Sciences, Cheju National University) ;
  • Kim, Mun-Gwan (Marine Research Institute, Cheju National University)
  • 박정식 (제주대학교 해양과학대학) ;
  • 김석종 (제주대학교 해양과학대학) ;
  • 김문관 (제주대학교 해양연구소)
  • Published : 1997.12.01

Abstract

We selected horse mackerel Trachurus japonicus, mackerel Scomber japonicus and arrow squid Todarodes pacificus, to be used in the experiment. These fishes migrate to the Cheju coast and were caught by set-net. We studied on the attracting effect and the leading effect on the fish school using incandescent lights in an outdoor water tank at the Marine Research Institute Cheju National University. The results obtained are summarized as follows; 1. The horse mackerels, mackerels and arrow squids were actively attracted to the incandescent light. The optimum illumination and the reactions of each fish school were different though. 2. We turned the first attracting lamp on and turned it off after ten minutes. Then we turned the second attracting lamp on and turned it off after another ten minutes. The reaction of each fish school was a little bit different, but it worked to lead them to their destination. 3. We turned the three attracting lamps on at the same tune. After ten minutes, We turned the first attracting lamp off. After another ten minutes we turned the second attracting lamp off. The reaction of each fish school was a bit different, but it worked to lead them to their destination. 4. One incandescent light was moving. The reaction of each fish school was a little bit different, but it worked to lead them to their destination.

제주도 연안 정치망어장에 다량 내유아여 어획되고 있는 전갱이,고등어, 오징어를 실험어로 하여 백열등에 의한 어군의 유집효과와 어군의 유도 효과에 관한 실험을제주대학교 해양연구소 옥외 수조에서 실시한결과를 요약하면 다음과 같다. 1. 백열등에 대한 전갱이, 고등어, 오징어 어군의 행동은 백열등에 잘 유집되는 경향을 보였으나, 백열등에 대해서 유집하는 적정조도와 반은행동은 어종에 따라 조금씩 다른 경향을 보였다. 2. 유도등을 한 등씩 순차적으로 점등후 소등하는 방법에 의한 전갱이, 고등어, 오징어어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다. 3. 유도등 3개를 모두 점등한 후 1번 등부터 순차적으로 한 등씩 소등하는 방법에 의한 전갱이, 고등어, 오징어 어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다. 4. 백열등의 이동에 의한 전갱이, 고등어, 오징어 어군의 행동양식은 어종에 따라서 약간 다르지만, 이들 어군을 목적지까지 유도할 수 있었다.

Keywords

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