• 수산경영론집
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• 제22권2호
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• pp.53-74
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• 1991

Interest on ocean environment has increased with the development of industrialized activities. Public marine resorces are defined broadly to include fish stocks, beaches, marine waters, recreational fishing, biota, waterfowls, shorebirds, seabirds and marine mammals But, it is not easy to analyze compensation for injury to publicly owned marine resources because the claimants do not exist clearly and the economic methodology of damage on public goods is not developed fully. This paper introduces basic idea of welfare economic theory and environmental legislation to the research question : How the economics and law can be applied to the case of damage on publicly owned marine resource. The paper discusses the concepts of willingness to pay (WTP) and willingness to accept (WTA). It is accepted generally that WTA is correct concept of welfare change in the case of damaged public goods. Four methods (compensating variation, equivalent variation, compensating surplus, equivalent surplus of measuring welfare changes are compared. Compensating variation(CV) is the best measure of welfare changes are compared. Compensating variation(CV) is the best measure of welfare changes caused by environmental damage. Vartia (1983) showed CV could be measured from the ordinary demand function using the differential equations. This paper also provides an overview of the emerging U.S. and Korea legal system for compensation for natural resource damages, with particular emphasis on U.S. legal system under Comprehensive Environmen-tal Response Compensation and Liability Act (CERCLA). These regulations are to include two different types of standardized procedures for assessing natural resources injury : Type A or simplified assessment techniques for small releases ; and Type B protocols that would include detailed and extensive assessment methodologies for major releases. Type A procedures are specified by Natural Resources Damage Assessment Model for Coastal and Marine Environment (NRDAM/CME) of the U.S. CERCLA provides a legal 'legitimization for the use of economic-based nonmarket valuation in the courts and have introduced appropriate and accurate nonmarket valuation methods based on willingness to-pay for damage assessment. By briefly reviewing economic theory and environmental legislation, we hope to help provide a better understanding of the compensation process and the economics of publicly owned marine resources in the U.S. and to integrate the economics and law of natural resources valuation into a single comprehensive package in Korea.

• 수산해양기술연구
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• 제35권4호
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• pp.343-352
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• 1999

Because stow net being used in now is doing throwing net and hauling net through a ship's side, the work is very complicated and the fishing boat needs many seamen and it could cause a loss of lives and ship in stormy weather. We are now using small mesh size 36~500mm and it even catches young fish, so we call it the fishing gear of resource reduction type.Therefore we must make manpower reduction in automatic operation, safe operation of throwing net and hauling net in the stern and the stern-typed stow net of resource management using large mesh. And we performed three-typed model tests to examine the fishing gear. The obtained results are as follows;1. The fishing gear being used in the ship's side type stow net has inappropriate standard and arrangement of the net, resistance increase of the fishing gear and frequent breakdown of the net.2. To supplement the fault of A-typed stow net, we schemed fishing gear developed as both B-type(12-seamed net) and C-types(8-seamed net) of the stern-typed stow net. 3. In model tests, C-typed model net(mesh size 40~1,600mm) was proved good fishing gear because the resistance in accordance with the flowing speed was comparatively small and it's mouth area was broad. 4. A-typed stow net had the spreading device attached to side panel of the net, but the stern-typed stow net had the spreading device consisted of 4 lines far behind about 6m from side panel of the net mouth. In the flowing speed 2knot, the spreading condition of fishing gear was proved batter than the former.

• 수산경영론집
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• 제42권3호
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• pp.31-39
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• 2011

This paper attempts to extend such analysis to the rather more difficult problem of optimal management of transnational fish stocks jointly owned by two countries. Transboundary fish such as Mackerel creates an incentive to harvest fish before a competitor does and leads to over-exploitation. This tendency is especially poignant for transnational stocks since, in the absence of an enforceable, international agreement, there is little or no reason for either government or the fishing industry to promote resource conservation and economic efficiency. In the current paper I examine a game theoretic setting in which cooperative management can provide more benefits than noncooperative management. A dynamic model of Mackerel fishery is combined with Nash's theory of two countries cooperative games. A characteristic function game approach is applied to describe the sharing of the surplus benefits from cooperation and noncooperation. A bioeconomic model was used to compare the economic yield of the optimal strategies for two countries, under joint maximization of net benefits in joint ocean. The results suggest as follows. First, the threat points represent the net benefits for two countries in absence of cooperation. The net benefits to Korea and China in threat points are 2,000 billion won(${\pi}^0_{KO}$) and 1,130 billion won(${\pi}^0_{CH}$). Total benefits are 3,130 billion won. Second, if two countries cooperate one with another, they reach the solution payoffs such as Pareto efficient. The net benefits to Korea and China in Pareto efficient are 2,785 billion won(${\pi}^0_{KO}$) and 1,605 billion won(${\pi}^0_{CH}$) or total benefits of 4,390 billion won : a gain of 1,260 billion won. Third, the different price effects under the two scenarios show that total benefit rise as price increases.

• 자원ㆍ환경경제연구
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• 제12권3호
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• pp.427-452
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• 2003

본 연구는 모든 수요분석이 자료수집과 분석전에 완전대체성과 상품묶음을 사전적으로 가정하고 있으며, 일반적인 수요모형에서 수요함수 자체가 존재하지 않음을 주목하고 한계가치함수체계에서 완전대체성의 제약조건을 이론적으로 도출하였다. 그리고 완전대체성이 사전적인 제약으로 부과될 경우 수집된 자료와 일관되지 않음으로써 수요분석을 어렵게 할 경우 파레토의 계약곡선처럼 정보계약곡선을 이용하여 완전대체성의 정도를 조절할 수 있으며, 그 결과 도출되는 정보를 이용하여 상품묶음의 정도를 파악할 수 있음을 보여준다. 실증적 분석의 예로서 한국어류시장의 주요어종들간에 한계가치의 변화를 통하여 대체성의 정도를 파악하고 상품묶음을 할 수 있음도 보여준다. 비록 형태에 따른 어종이 다르더라도 소비자의 눈에서 보는 대체정도는 다른 것으로 볼 수 있으며, 그러한 시각에서 대체성과 상품묶음이 이루어질 수 있음도 보여준다. 이렇게 정보계약곡선을 따라 제약의 강도가 달라질 때 경제학적으로 합리적인 탄력성의 값을 택하여 후생분석으로 확장할 수 있음을 말해준다. 아직 이러한 연구가 초기단계이므로 많은 미래의 연구와 활용에 기여할 수 있을 것이다.

• Ocean and Polar Research
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• 제44권2호
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• pp.113-126
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• 2022

This study was carried out to investigate the benthic polychaetous community and benthic ecosystem quality status on the adjacent continental shelf of Jeju Island, and field surveys were conducted at 31 stations in July and August, 2020. The surface sediment was generally composed of muddy sand facies and sandy mud facies, and the average particle size was medium silt (6.1±1.6∅). The benthic polychaetous community revealed a total of 73 species with a mean density of 242 ind./m². The major dominant species were Notomastus latericeus, Ampharete arctica and Onuphis shirikishinaiensis. By the cluster analysis and nMDS results based on species composition of the benthic polychaetous community, the study area was divided into three station groups arranged from east to west by the water depth and sedimentary facies. The station group located in the west was subdivided into two station groups from south to north. From results of correlation analysis and PCA, it was found that the benthic polychaetous community in the study area had a strong correlation with the sedimentary environment and water depth. The benthic faunal community (or ecosystem) on the adjacent continental shelf of Jeju Island was assessed to be in a healthy state by biotic indices such as AMBI and BPI.

• 한국수산과학회지
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• 제42권6호
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• pp.621-627
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• 2009

In order to standardize the juvenile abalone rearing technique, we selected sample farms by region in East, West and South coasts of Korea and Jeju island. We also have reviewed previous literature and visited farms to survey on the management of abalone juvenile production, spawning, hatching and so forth. Results of investigation are as follows: The light colors of tanks for larvae breeding are good for a frequent examination of larvae behaviour changes during the breeding period. The tank for the abalone juvenile production is a rectangular form in general and its size should amount to 3.5 m in length and 1.2 m width. It also should be built with proper drainage. The best age and size of adult for juvenile production are 3-6 years old individuals, with 9-12 cm separate burial and 125-150 g average weight. To induce spawning, the use of the exposure on air and ultraviolet ray together was the most effective. The density of larvae by plate should be 150-300 individuals and the proper stocking density was est imated and amount to 10-30 individuals. It has been shown that a correlation between water surface size($X_1$) and number of plates ($Y_1$), when producing abalone juveniles, is quite high and it is described by equation $Y_1=138.88X_1-5,736.8\;(R^2=0.9028)$. In addition, it has also been shown that a correlation between production of abalone juveniles ($Y_2$) and number of plates ($X_2$) is high and it is described by equation $Y_2=4.554X_2+12,493\;(R^2=0.8818)$. In Jindo region where a mass production of juveniles abalone has been done, it was shown, that a correlation between rearing water surface size ($X_3$) and production of juveniles abalone ($Y_3$) is very high and this relationship was described by the equation $Y_3=747.03X_2+94,359(R^2=0.9809)$. It has also been shown that a correlation between water surface size ($X_4$) and production of abalone juveniles ($Y_4$) in nationwide is high and the relationship between this variables was described by equation $Y_4=635.85X_4+99,923\;(R^2=0.9020)$.

• 생명과학회지
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• 제33권8호
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• pp.623-631
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• 2023

본 연구는 차세대 염기서열 분석법(NGS)을 사용하여 벤자리의 microsatellite 마커를 개발하고, 개발한 마커를 사용하여 벤자리 집단의 유전학적 특성을 분석하기 위해 수행되었다. 차세대 염기서열 분석 장비인 Illumina Hiseq X ten을 사용하여 총 402,244,934개의 read들을 얻어 assembly를 실행한 결과, 전체의 약 0.33%에 해당하는 1,320,995개의 read들이 assembly 되었으며, 이 read들의 총 길이는 705,613,658 bp로 확인되었다. 크기가 640 bp 이상이 되는 contig는 952,326개로 나타났으며, 이 중 microsatellite 영역을 포함하는 contig를 151개(0.016%)로 1차 선별하고, PCR 증폭 여부를 통해 microsatellite 후보 34개를 2차로 선별하였다. 그 중 벤자리 집단의 마커로서 유용한 15개의 microsatellite 마커를 최종 선택하였다. 새로 개발한 15개의 microsatellite 마커를 사용하여 벤자리 집단을 대상으로 분석한 결과, 관찰된 유효 대립유전자 수(N_A)는 평균 12(6~25)로 나타났다. 평균 관측치 이형접합도(H_O)와 평균 기대치 이형접합도(H_E)는 각각 0.750(0.530-0.873)와 0.793 (0.647-0.895)으로 나타냈으며, 이는 해산어의 평균 값인 0.79와 유사한 수치를 나타내었다. 따라서 본 연구에서 개발한 15개의 microsatellite 마커는 벤자리 집단의 유전학적 특성 분석에 유용할 것으로 사료된다.

• 현장농수산연구지
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• 제21권2호
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• pp.27-33
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• 2019

본 연구는 다른 지역에 비해 일교차가 큰 철원 지역에서 재배되고 있는 양파와 각 지역별 전남 무안, 전북 부안, 경남 창녕지역 양파의 생육특성과 저장 후 변이를 알아보기 위해 수행되었다. 그 결과 철원, 무안, 부안, 창녕 지역의 양파 저장 실험 결과 저장 전 과 후의 생육특성(구경, 구고, 구중)은 큰 차이를 보이지 않았다. 저장 전과 후의 당도는 저장 후에 당도가 약 1-2 brix 정도 감소되었다. 각 지역별로 저장 전과 후의 당도는 철원 양파가 높았고 저장 후에도 역시 같은 순이었다. 각 지역별로 저장 후 경도를 측정한 결과 철원(112.3g) > 무안(106g) > 부안(102.1g) > 창녕(92.6g)으로 철원양파가 높은 경도를 보였다. 경도의 차이는 지역별 낮과 밤의 온도차 및 재배농가에 따라 차이가 나타나는 것으로 보인다. 저장 용기별(양파망, 종이박스, 박스) 저장 실험 결과는 종이박스에서 부패수가 가장 적었다. 따라서 양파를 저장할 때 부패수를 줄이기 위해 종이 박스를 이용하는 것이 유익하다고 사료된다.

• 수산해양기술연구
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• 제45권4호
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• pp.211-222
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• 2009

The fisheries resources by a set net in the coastal waters off Neungpo, Goeje Island from 2003 to 2004 were studied to determine species composition and catch variation. The main fishing period by a set net were from April to December in 2003 and from May to December in 2004. A total weight of 48 species caught through the survey period was 540,688.0kg. Most of them were 44 species of fishes and a few were 4 species of cephalopods. Dominant species was Trachurus japonicus accounting to 57.5% in total catch. Sub-dominant species were Trichiurus lepturus(12.9%), Engraulis japonicus(10.6%), Scomber japonicus(6.9%), Clupea pallasii(4.5%), Todarodes pacificus(2.8%) and Parapristipoma trilineaturm(1.3%). The remnant species showed a low catch, indicating the catch had less than 1% in total, respectively. T. japonicus and T. lepturus were caught throughout the survey period, but C. pallasii, Gadus macrocephalus, Oncorhynchus keta in low temperature season and Thunnus obesus in high temperature season. The fishing ground temperature was 11.7-24.0${^{\circ}C}$ in range and the catch by a set net was higher in autumn than in spring and in summer with the variation of fishing ground temperature. The annual catch by a set net was much higher in 2004 than in 2003 due to high temperature(>17${^{\circ}C}$) and the recruitment of T. japonicus from offshore seas. Therefore we concluded that the catch of Neungpo fishing ground by a set net was highly related to the variation of T. japonicus catch with fishing ground temperature.

• 수산경영론집
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• 제50권4호
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• pp.29-44
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• 2019

This paper examines the trend of restructuring and direction of management response in the Large Purse Seine Fishery. The large-scale fishing industry is one of the most popular fishing areas in the coastal area, and it has been developed by providing exclusive supplies of many types of catchy fish, such as mackerel and horse mackerel through physical productivity in fleet operations. However, the Large Purse Seine Fishery has been declining in profitability due to the deterioration of the business environment since 2000. It is at a crossroads whether it will disappear or regenerate as it is. The Large Purse Seine Fishery's current problems are: firstly, the continued deterioration of the fishery business balance and worsening labor problems, secondly, insufficient freshness management and quality control after landing, and thirdly, import competition. The fourth is the intensification of the market competition, which is the evolution of fishing variability and the increase in the proportion of small fish. The fifth is the reduction of the operating fishing ground due to the suspension of mutual fishing in Korea and Japan. To address these problems and suggest management response directions for the survival of large-scale fishing businesses is as follows. First, a sustainable production system should be established through strengthening resource management and promoting international fisheries cooperation. Second, the profitability of fishing management should be improved by introducing a low-cost supplier system and securing a stable labor force. Third, we should improve the leading and quality control of catch, improve the high value-added value of catch through brand development, and secure competitive advantage with imported produce. Finally, the government should establish a cooperative system among private sector, government, and research institutes to push ahead with these tasks and strengthen the competitiveness of the front and rear industries.