• 대한조선학회지
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• 제8권1호
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• pp.67-94
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• 1971

Korean fisheries industry holds 57,255 boats amounting to 269,079 tons in gross as of the end of 1967. The boats of the size under 30G.T., about sixty-two per cent of the total in tonnage, are utilized in coastal and their contribution to the total production of Korean fisheries industry is estimated at over seventy-five percent. Hull forms and construction method of them are partly in transition stage to the western tradition from the oriental tradition, which employs the chine-type straight-framed section, and tick and wide wooden planking fastened on naturally bent timber frames. And only about a half of them are mechanized. About fifty-seven per cent, 7,525 boats amounting to 91,751 gross tons, of the coastal and inshore fishing boats are those of the size ranging 5G.T. to 30G.T., which are engaged mostly in draft-and gill-netting, angling, longlining, anchovy seining, squid fishing and set-netting. The important fishing boats forming main structure of the inshore fishing fleets can be classified as 5G.T.-class multi-purpose boats, 10G.T.-class angling/longlining boats and 20G.T.-class drift-/gill-netters mostly utilized in the east-sea, 15G.T.-class anchovy seiner in the south-sea-sea, 20G.T.- and 28G.T.-class stow-netters in the west sea. Each of the three sea regions, east, south, and west, of Korean water has distinctly different characters from one another in topography, geology and sea aspects, and consequently in marine resources, fishing grounds and fishing tactics desired. Hence, the finishing boats in each sea region have also their own characters in hull form, structural features, deck design and equipments. In this report, analyzing the characteristics of the existing inshore fishing boats ranging 5G.T. to 30G.T. in size from view points of naval architecture and engineering, the author made an integrated investigation of their characteristics, covering size and principal dimensions, hull form, deck design, structural features and mechanization, in close connection with the natural circumstances of Korean water and local techno-socio-economic problems, and, finally, made some suggestions for the rational improvement or modernization of the inshore fishing boats. Further details of the characteristics of Korean inshore finishing boats are referred to the drawings of them compiled by the author and given in the reference[23] listed at the end of this report.

• 수산경영론집
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• 제43권3호
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• pp.43-57
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• 2012

According to the result of the recent survey on the current condition of loss of the fishing gears in the East, West and South seas, it is estimated that 50% of the fishing gears used for coastal trap and gill net fisheries are lost every year and 20~30% of those used for inshore trap and gill net fisheries are lost. It is reported that such loss of fishing gears leads to the loss of about 10% of 1.7M tons of the total annual catch from the gill nets and traps along the country's coasts and shores, which amounts to 15~170K tons. Submerged marine litters that have recently been accumulated because of the washed out or lost fishing gears significantly affect the development of fisheries resources as well as the natural environment. The purpose of this study is to identify the damages that the ever-increasing submerged marine litters of washed out fishing gears would have on the fishery and to analyze the effects of the coastal and inshore submerged marine litter collection business on the fishery management. For this, the economic analysis was carried out for the coastal and inshore submerged marine litter collection business based on the fishermen's expenses and earnings and their catch. The result of the analysis shows that the submerged marine litter collection business is quite effective in certain areas but rarely effective in other areas. However, taking into consideration that the litter collection would contribute to protecting the marine environment as well as the fisheries resources, it is expected to have a significant impact on the protection of the marine environment even in those areas where it is not effective for the protection of the fisheries resources.

• Fisheries and Aquatic Sciences
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• 제18권4호
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• pp.411-416
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• 2015

We estimated abundance of the finless porpoise Neophocaena asiaeorientalis in the west coast of Korea in 2011 and compared it to the abundance data estimated by Park et al. (2007). The two researches used same line transect method operated by a vessel, and the study area were divided into the offshore and the inshore regions to assess variations in their abundance. In offshore regions population density of finless porpoises was $0.122ind./km^2$, which was lower than $0.565ind./km^2$ estimated in 2004. In inshore regions the population density was $0.151ind./km^2$, which was much lower than $0.638ind./km^2$ estimated in 2005. Thus, we estimate that the population densities of the finless porpoises in both the offshore and the inshore regions of the west coast of Korea has decreased by approximately 70% between 2004/2005 and 2011.

• 수산해양기술연구
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• 제36권1호
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• pp.12-24
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• 2000

The electro-hydraulic servo winch system built in a automatic tension control equipment was designed with a latent need for an advanced system in fishing operations of the inshore and coastal fishing vessels. In order to keep the constant tension condition of warp under loading, a tension control circuit was added to the servo winch system.The dynamic performance in the open loop behaviour of the designed winch system was investigated and its applicability was tested for various possibilities of load using a load generator especially developed in order to this study.The mechanical characteristics of this system is different from that of a conventional type, that is, the tension, length, line speed and drum revolution can be automatically controlled by the information from various sensors, such as torque, rpm and pressure transducers. from the experiment results, it was verified that the servo winch system has very good output and tracking behaviour for the control input signals in different operating conditions though overshoot of out 8% in the transient characteristics of torque under the load though a overshoot of about 8% in the transient characteristics of torque under the load condition can be observed when the opening of servo valve, adjustable by the input voltage between - 10 V up to 10 V, changed suddenly.Consequently, the improved fishing winch system can be effectively used as the automatic shooting and hauling equipment of low cost for small inshore and coastal fishing vessels which engage in net fishing.

• 한국해양학회지:바다
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• 제7권2호
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• pp.78-86
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• 2002

제주도 중문 연안역의 각 크기별 플랑크톤을 영양형에 따라 구분하여 세포수, 탄소량, 엽록소량의 시 ${\cdot}$ 공간 분포 그리고 환경요인간의 상관관계를 1999년 7월부터 2000년 6월까지 조사하였다. 종속영양성 초미세플랑크톤(HPP) 세포수의 연평균은 외해에서 1.4${\times}$$10^{6}$ cells ${\cdot}$ $ml^{-1}$, 해안에서 8.3${\times}$$10^{5}$ cells ${\cdot}$ $ml^{-1}$을 보였고, 독립영양성 초미세플랑크톤(APP)도 외해에서 9.9${\times}$$10^{4}$ cells ${\cdot}$ $ml^{-1}$, 해안에서 7.1${\times}$$10^{4}$ cells ${\cdot}$ $ml^{-1}$을 보여 외해에서 더 많은 분포를 보였으며 우리나라 다른 해역에 비해서도 많았다. 그러나 종속 및 독립영양성 미소플랑크톤(HNP, ANP)은 해안이 외해보다 더 많은 세포수 분포를 보였다. 소형플랑크톤(AMP) 세포수는 해안에서는 규조류의 변동(r=0.962, P${\le}$0.001), 외해에서 와편모조류의 변동 (r=0.868, P${\le}$0.001)에 의해 영향을 받고 있었다. 그러나 영양형과 크기별 구분에 의한 각 그룹간 상관관계에서 포식자와 피식자의 상관성은 보이지 않았다. 탄소량의 공간적인 분포는 세포수와 같았으나 크기별 비율은 전혀 달라 독립영양성 미소플랑크톤(ANP) 탄소량이 가장 높은 비율을 보였다. 크기군에 따라 엽록소량의 계절변동은 달랐으며 초미세플랑크톤(APP)은 2000년 3월에 0.42 ${\mu}g$CHl-${\alpha}$${\cdot}$$1^{-1}$(57.9%)로 가장 높은 비율을 보였고, 미소플랑크톤(ANP)은 2000년 5월에 1.42 ${\mu}g$CHl-${\alpha}$${\cdot}$$1^{-1}$(74.7%)로 가장 높았으며 소형플랑크톤(AMP)은 1999년 7월에 1.51 ${\mu}g$CHl-${\alpha}$${\cdot}$$1^{-1}$(81.8%)로 가장 높았다. 생물인자와 환경요인의 상관성을 주성분 분석에 의한 요인을 추출한 결과 인,규소 증가와 자가영양성 미소플랑크톤(ANP)증가에 미치는 요인이 해안과 외해에서 동일하게 가장 큰 설명력을 보였다. N:P 비도 해안에서 36.4, 외해에서 32.6을 보이고 있어 인이 상당히 부족한 것으로 나타났다. 따라서 조사해역은 인이 식물플랑크톤 성장에 중요한 제한요인으로 작용하고 있다고 판단된다.

• 미생물학회지
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• 제13권4호
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• pp.157-164
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• 1975

The distribution and population densities of yeasts including their epiflora on seaweeds were estimated over two months in inshore waters of Mok-po, Korea. Nine species of 48 isolates were obtained from this area. Rhodotorula, Torulopsis and Debaryomyces that are widespread in estuaries were of common occurrence in this water body. The highest counts belonged to Torulopsis candida which was predominated in temperate estuarine zone. The distribution of sea weeds seems to be correlated with the population densities of yeasts. Two species of marine algae harbored yeasts during May and July, 1975. Among seaweeds isolates, the highest numbers werre of the species Rhodotorula glutinis var. glutinis. A dominant colonization of this strain on Chlorophyceae and Phaeophyta and a role of water temperature for the growth of yeasts are discussed.

• Fisheries and Aquatic Sciences
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• 제12권3호
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• pp.240-248
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• 2009

Distribution and abundance of planktonic shrimps were studied in the southern sea of Korea from 1987 to 1991. Nine species of five genera belonging to three families were identified. Of these, Leptochela sydniensis and Lucifer intermedius were predominant species and Lucifer penicilifer and Lucifer typus were common species. Remaining five species, Acetes chinensis, Leptochela gracilis, Lucifer chacei, Process wheeleri and Sergestes similis occurred sporadically and rarely. The distribution pattern of planktonic shrimps varied with species and sampling periods. L. intermedius occurred abundantly along inshore waters. L. penicilifer and L. typus appeared in both inshore and offshore waters, but more abundantly in offshore waters under influence of the Tsushima Current. In conclusion, the distribution patterns of planktonic shrimps may be related with hydrographic characteristics and seasonality in the southern sea of Korea.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.285-290
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• 2005

지금까지 우리나라의 양식 산업은 양적인 측면에서 괄목할 만한 성장을 하였으나, 양적인 성장의 이면에 많은 문제를 파생시켜 최근에는 여러 가지 형태로 그 부작용이 나타나고 있다. 특히, 우리나라 양식 시설의 약 82%가 남해안의 내만에 집중 시설되어 있어 생활오수와 공장폐수의 유입 및 한정된 영역에서 장기간의 고밀도 양식으로 양식장들의 자가 오염등으로 어장환경이 악화되고 있다. 이같은 문제를 해소하기 위한 방안으로는 수질이 양호하며 해수유동이 많아 환경 피해가 적은 외해를 이용하는 것이 점차 대두되고 있다. 그러나 외해는 수질히 비교적 양호하나, 양식시설에 직접 피해를 줄 수 있는 높은 파도와 강한 흐름이 존재하고 있어 기존 내해용 양식시설로 외해로 진출하는 것이 곤란하므로 외해의 해양조건에 알맞은 양식 시설물의 개발이 필요하다. 본 연구는 이러한 필요성을 염두에 두고 외해양식에서 사용가능한 양식구조물의 설계에 필요한 이론적 연구와 실험적 해석을 수행하였다.

• 대한조선학회지
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• 제7권1호
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• pp.57-78
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• 1970

The Korea inshore fishing boats are the size up to 30G.T., and their construction commonly employs the traditional wide wooden planking. Nevertheless, the hull forms have been developed with chine-type straight-framed sections which give developable surface party, but not on the whole: especially not on the whole portion of the hull are preferable for them. Considering many merits in the boat construction, the author, excluding cases of the FRP construction by hand lay-up or spray-up method and of the ferro-cement construction, finds out no reasons to depart from the chine-type hull forms of a developable surface in future development of their hull forms, too. In this report, the author proposed new designs of the developable hull surface for four typical boats forming the main structure of Korean inshore fishing fleets; 5G.T.-class multi-purpose boat, 10G.T.-class angling and longlining boat, 20G.T.-class drift and gill netters, and 27G.T.-class stow netters, and presented the tank test results on their propulsion resistance. The tank test had two purposes; one is to present the powering schedule of the new designs and the other to investigate the resistance characteristics of this kinds of boat in comparision with those of equivalent round-type boats at operational speed ranges. Between the both types of the boat no material differences in powering are expected. Hence, the author is confident of that saving in the construction cost of the developable hull over that of the round-type boat may result in considerable contribution to the over-all boat economy.

• 수산해양교육연구
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• 제28권6호
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• pp.1581-1590
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• 2016

In order to reduce the risk of death from hypothermia for the fishing vessel's crew at sea, this paper suggests that the criteria of equipment of fishing vessels should be revised for fishing vessels engaged in coastal and inshore fisheries to be equipped with the immersion suit. The criteria of equipment of fishing vessels for immersion suits was amended to reflect the sinking of No.501 Oryongho but it was only reflected in ocean fisheries at Bering sea and Antarctic ocean that immersion suits must be provided with the same number of the total number of crew on board. Therefore, this paper analyses the relationship between maritime accident of fishing vessels and weather condition based on sea water temperature to find out the risk of hypothermia and also compares the international conventions(SFV Protocol 1993, Cape Town Agreement 2012, STCW-F 1995 and SOLAS 1974) and domestic law concerning criteria of equipment of fishing vessels. As a result, fishing vessels engaged in coastal and inshore fisheries are exposed to the risk of hypothermia when they are in distress and the criteria of equipment of fishing vessels should be amended to provide the immersion suits in accordance with the revision trend of international conventions.