예인식 심해용 비디오카메라를 이용한 대게의 서식밀도 추정
Estimation of the distribution density of snow crab, Chionoecetes opilio using a deep-sea underwater camera system attached on a towing sledge
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초록
This study shows that the distribution density of snow crab, Chionoecetes opilio, was estimated using an underwater video monitoring system attached on the towing sledge. The field experiments were carried out at the coastal waters around Chuksan, East Sea, where ranged from 110 to 130m depth during September and October 2007. The sledge was towed for 40 minutes and the towing speed was controlled between 1.5 to 1.7 knot and each research areas were calculated to multiply towed distance by the detection width of the video monitoring system (1.2m), and then, distribution density of snow crab in each observations were estimated as a counted number of crab per 1,000m2. The result shows that their survey, taken between two months, reflected similar results during survey period, and the maximum and mean distribution densities in September estimated to be 77.0(number/1,000m2) and 19.9, respectively, and those of October were 36.0 and 21.8, respectively.
Abstract
This study shows that the distribution density of snow crab, Chionoecetes opilio, was estimated using an underwater video monitoring system attached on the towing sledge. The field experiments were carried out at the coastal waters around Chuksan, East Sea, where ranged from 110 to 130m depth during September and October 2007. The sledge was towed for 40 minutes and the towing speed was controlled between 1.5 to 1.7 knot and each research areas were calculated to multiply towed distance by the detection width of the video monitoring system (1.2m), and then, distribution density of snow crab in each observations were estimated as a counted number of crab per 1,000m2. The result shows that their survey, taken between two months, reflected similar results during survey period, and the maximum and mean distribution densities in September estimated to be 77.0(number/1,000m2) and 19.9, respectively, and those of October were 36.0 and 21.8, respectively.
참고문헌 (6)
- Fujita,K., "Behavioral responses of the snow crab to the ground rope of a bottom trawl", Nippon Suisan Gakkaishi, 72(4), pp.695~701 (2006)
- Jadamec,L.S., "Biological field techniques for Chionoecetes crabs", pp.77~ (1999), University of Alaska Sea Grant College Program
- Lim,Y.S., "Morphometric characteristics and gonad maturity of snow crab, Chionoecetes opilio in the eastern coast of Korea", Journal of Aquaculture, 13(3), pp.245~251 (2000)
- National Fisheries Research & Development Institute(NFRDI), "Stock assessment and fishery evaluation report of year 2006 TAC-based fisheries management in the adjacent Korean waters", Stock assessment and fishery evaluation, 10, pp.153~175 (2005)
- 朴倉斗, "刺網에 대한 대게 수컷의 網目 選擇性", 한국어업기술학회지, 39(2), pp.143~151 (2003), 한국어업기술학회
- Watanabe,T., "Estimation of the snow crab population density using the deep-sea video monitoring system on a towed sledge", Nippon Suisan Gakkaishi, 67(4), pp.640~646 (2001)