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가막만 양식굴의 대량폐사에 관한 연구 I. 굴 양식장 환경요인
최상덕,정대신,양문호,우찬열,김두용,김성연,라성주,박종수 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-
가막만에서 발생한 양식굴의 폐사원인을 조사한 결과는 다음과 같다. 가막만 상부지역(정점 10,11), 하부지역(정점 1∼4,7∼9) 및 백야도에서 양식굴의 평균 폐사율은 각각 76.85%(75.4∼78.4), 23.61% (9.6∼43.6%), 54.7% (49.0∼60.4%)였다. 굴 양식장 주변 해역에서 1996년 8∼9월의 수온과 비중은 평년(1990∼1995)보다 각각 1.5℃, 0.0003씩 높았다. 굴 양식장 수질의 DO,COD는 각각 7.43∼9.07 ㎎/ℓ, 0.19∼1.26 ㎎/ℓ였고, PO₄-P, DIN은 각각 0.42∼0.71 ㎍-at/ℓ, 4.52∼9.97 ㎍/ℓ였다. 그리고 양식굴의 폐사율이 높은(76.85%) 정점 10에서 지질의 T-S, COD, IL은 각각 0.43 ㎎/g ·dry, 18.0 ㎎/g ·dry, 3.2%였고, 폐사율이 낮은(28.8%) 정점 2에서는 각각 0.01 ㎎/g ·dry, 5.4 ㎎/g ·dry, 1.2%였다. 그리고 Chl-a량은 8, 9월에 높게 나타났다. 가막만에서 양식굴의 폐사 원인은 고수온, 고비중, 해수 및 저질이 오염에 의한 것으로 추정된다. We studied mortality of cultivated oyster in Kamark Bay. Mean mortality of oyster were 78.85%(75.4∼78.4%) in inner (st. 10, 11) of Kamark Bay, 23.61% (9.6∼43.6%) outer (st. 1∼4, 7∼9) of Kamark Bay, and 54.7% (49.0∼60.4%) in Baekdo (st. 5∼6), respectively. At surrounded oyster farm area, temperature and salinity were 1.5℃ and 0.0003 higher from August to September in 1996 than ordinary year (1990∼1995). DO, COD, PO₄-P and DIN of seawater in this area were 4.52∼9.97 mgt/ℓ, 7.43∼9.07 ㎎/ℓ, 0.19∼1.26 ㎍-at./ℓ, 0.42∼0.71 ㎍-at./ℓ and 4.52∼9.97 ㎍-at./ℓ, respectively. T-S, COD and IL of sediment were 0.43 ㎎/g ·dry, 18.0 ㎎/g ·dry and 32% in station 10(high mortality, 78.3%) and were 0.01 ㎎/g ·dry, 5.4 ㎎/g ·dry and 1.2% in station 2(low mortality, 28.8%), respectively. Chl-a was maximum in August and September. This suggests that the mass mortality of cultivated oyster is caused by high temperature, high salinity, pollution of seawater and sediment.
鮟鱇網 漁具 漁法의 改良에 관한 硏究(Ⅱ) : 展開帆을 이용한 改良漁具 試驗(豫報)
李吉來,宋之浩,朴鍾洙,徐萬錫,趙鳳坤,朴正鎬,洪聖根,鄭公炘,裵錫悌,鄭與基,金鎭乾 군산대학교 1980 群山水産專門大學 硏究報告 Vol.14 No.1
Ordinarily stow net fisheries was used by floater beam and sinker beam for the purpose of spreading the mouth of net. But it was not only iuconvenient and dangerous but much defective. In this thesis, we have studied fundermental experiment of the improved stow net fishing gear using head rope, ground rope and otter sail instead of floater beam and sinker beam. From the result of this experiment, it has been succeeded for fishing work to achieve basically without any difficulty. The results obtained in this study were as follows. 1) The resistance of fishing gear was estimated R≒7V2 as possible as it is taken greatly. (R: Resistance V: the rate of current) 2) The interval of otter sail was spreaded smoothly. Being in normal condition, it was maintamed the width 37-38m. It was heared comparison with net mouth of ordinary gear, and the shearing force was enough. 3) The height of mouth was lower than we have anticipated to and seemed to have the supplement of buoyancy. But according to increasing the rate of current, the lowness of mouth height was little affected. 4) The height of otter sail was decreased at the rate of 30% by the rate of current, on the contrary, the height of wing was not decreased owing to sufficient buoyancy, 5) The adjustment of extention length of hanging wire(connected with fishing boat) and raising wire(with otter sail) was great important problem and it must be dealed with the most moderatly because of a corelation between the spreading of fishing gear and catching ability. 6) On the depth of 30m, it was taken 25 minuits to cast anchor and lines, 20 min cast net, 24 min haul net, 45 min haul lines and heave anchor, respectively. 7) The improved stow net with otter sail was cleared up the defects and difficult problems in ordinary gear using floater beam and sinker beam, and it have more advantages of fishing work than ordinary one. But there were involved in lots of problems in details to solve in the future.
裵錫悌,宋之浩,李吉來,鄭興基,洪聖根,趙鳳坤,朴種洙 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.1
In order to develop the curriculum of the fishery department in the fisheries Jr. college, We have collected and analyzed the domistic and foreign data adquated to the fishey department under the international trend, also we gathered the opinion from the inquiring paper investigation and consultation to the industrial field, concerned college and graduate during the 6 month from September 1982. The fishery department curriculum in fisheries Jr. college will be industrialized with the concerned technics and knowledge in relation to speciality of maritime affairs. Accordingly, we have developed the adquate curriculum which is practical and can be cultivated the technician to adopt in the industrial society.