실험실에서 문어 통발용 정어리 미끼의 유인 효과
The luring effect of the sardine bait for octopus pot in laboratory
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참고문헌
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초록
문어 통발용 대체미끼를 개발하기 위한 기초연구로서 문어 통발 어업에 사용 중인 정어리 미끼의 유인 효과를 조사하였다. 미끼의 침지시간은 5일 이하와 11일 이상인 경우로 구분하였다. 실험어의 미끼 통발과 빈 통발에 들어간 횟수는 암순응 상태와 명순응 과정에서, 구간분포는 명순응 과정에서 조사하였다. 정어리 침지시간 11일 이상의 경우가 5일 이하보다 미끼 통발의 구간에 분포하는 비율이 높았다. 침지시간 5일 이하인 경우는 암순응 시간이나 명순응 시간에도 미끼 통발과 빈 통발에 들어간 횟수는 비슷했다. 그러나 침지시간 11일 이상의 경우에는 빈 통발보다 미끼 통발에 들어가는 시간이 빠르고 암순응 시간에 훨씬 많이 들어갔다. 물론 어느 통발에도 들어가지 않는 경우도 있었다. 미끼의 부패가 적은 5일 이하인 경우는 상대적으로 명순응 과정에서 빈 통발에 들어간 횟수가 많았는데, 통발이 은신처 역할을 한 것으로 나타났다.
Abstract
This study investigated the luring effect of the sardine bait, which is used to catch octopus with pot, as the preliminary study for the development of alternative bait for octopus pot. The soaking time for bait was divided into “5 days or less” and “11 days or longer” The number of times octopus entered the pot with bait and the empty pot was investigated under dark adaptation and light adaptation processes and the distribution of tank section was investigated under light adaptation process. The case of “11 days or longer” sardine soaking time showed higher rate of distribution in the section of pot with bait compared to the case of “5 days or less” In the case of “5 days or less” soaking time, the number of times the octopus entered the pot with bait was similar to that it entered the pot without it even during dark adaptation and light adaptation. However, in the case of “11 days or longer”, the octopus entered the pot with bait more quickly than the pot without bait and more frequently during dark adaptation hours. There were cases where the octopus did not enter any pot. In the case of “5 days or less”, with less decomposition of baits, the octopus entered the empty pot more during light adaptation process, and it appeared that the pot was used as a hideout.
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