• Environmental and Resource Economics Review
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• 제15권1호
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• pp.71-94
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• 2006

Reducing fishing capacity is one of hot issues in the world fisheries. Increased fishing capacity causes not only fish stocks to be depleted, but also additional fishing costs to be incurred, resulting in reductions of fishing profits. In order to achieve a sustainable and profitable development of fisheries, it is inevitable to reduce fishing capacity. For this reason, FAO adopted 'the International Plan of Action for the Management of Fishing Capacity' and recommended member countries to estimate fishing capacity and to implement the policy to reduce fishing capacity. This study is aimed at measuring fishing capacity of Large Purse Seines Fishery using a Data Envelopment Analysis (DEA). The DEA result showed that the practical catch of large purse seine fishery in 2003 was 158,662 tons, but the capacity output for current input was 318,397 tons. The capacity utilization is about 50%, it is obvious the capacity did not utilize enough. The sensitivity analysis on DEA results indicated that the number of ships (including tonnage and horse power) should be scrapped by 50% or days fished should be reduced by 63% if the present catch remained. In addition, if the catch remains at the MSY base level of large purse seines, the analysis suggested that the number of ships (including tonnage and horse power) should be reduced by 30%, otherwise days fished should be reduced by 60%.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2001년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.33-34
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• 2001

지금까지 이러한 선망 어구의 조업시 형상에 관해 많은 연구 결과들이 있다. 그러나 이들 대부분이 해상실험 또는 모형실험으로서 실험자체의 어려움과 번거러움 등으로 다양한 실험이 불가능하다. 이러한 실험의 단점을 보완할 수 있는 것이 시뮬레이션에 의한 연구이다. 하지만, 선망어구는 매우 대형의 어구 시스템이며 대부분 그물이라는 유연한 물체에 의해 구성되어있어 외력에 대해 그 형상이 비선형적이므로 그 형상과 운동을 정의하기가 어렵다. (중략)

• Journal of the Korean Society of Fisheries and Ocean Technology
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• 제39권2호
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• pp.99-111
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• 2003

The fundamental studies on the productivity improvement of the purse seine fishery are presented in this paper. The experiment on net shooting and hauling was carried out in the near sea of Jeju Island (33$^{\circ}$37.8' N, 126$^{\circ}$31.1' E) by using the Cheju national university training ship (A-Ra, 990tons) which was constructed for the one boat system operation of purse seine. The corkline and leadline of the purse seine used for the experiment were 829.1m and 995.7m in length, respectively. Micro data recorder system, net sonde, and tensiometer were used to measure the depth of leadline and the tension of purse seine. Based on the measurement data, the motion and tension of purse seine at the time of shooting, hauling, and pursing were characterized. The experimental results are summarized as follows ; 1. The shooting and hauling of net were found to be possible in the one boat system experimental operation. 2. At the time of purse seine shooting, the relationship between the depth (Dp) of leadline and elapsed time (Et) was found to be Dp=7.58Et-6.48. 3. At the time of pursing, the relationship between the depth (Dp) of leadline and elapsed time (Et) was found to be Dp=-0.8Et$^2$＋7.42Et＋92.04. 4. At the time of pursing, the tension (metric tons) of purse seine attained its maximum value (14.7tons) when the elapsed time is 8 minutes. The relationship with the elapsed time was found to be T=-0.13Et$^2$＋3.23Et-5.72.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2002년도 춘계 수산관련학회 공둥학술발표회
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• pp.63-64
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• 2002

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2002년도 춘계 수산관련학회 공둥학술발표회
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• pp.81-82
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• 2002

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2000년도 추계수산관련학회 공동학술대회발표요지집
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• pp.279-280
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• 2000

고등어는 우리나라 전 해역에 광범위하게 분포하는 회유성 어종으로 주로 대형선망어업에 의해 연중 어획되며, 최근 연근해 전체 어획량의 10∼25％를 차지하는 산업적으로 중요한 어종이다. 또한 고등어는 전갱이, 정어리, 삼치, 붉은대게 와 함께 TAC 대상어종으로서 이러한 제도의 지속적인 실시를 위한 TAC산정 대상어종의 자원특성 파악이 선행되어져야 한다. 정확한 TAC추정을 위해서는 어업자원의 생물학적 특성 구명과 자원변동에 영향을 줄 수 있는 해양학적 특성도 함께 고려되어져야 한다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2002년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.39-40
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• 2002

전어는 한국 연안에 널리 분포하고 있으며, 주로 남해안과 동해안에서 어획이 이루어지고 있다. 전어의 어획 방법은 1978년까지는 주로 자망에 의하여 어획되었으나, 최근에는 소형 선망에 의한 어획량이 증가하고 있으며, 이것은 소수의 소형 선망에 전어가 대량으로 어획되는 영향에 기인한다. 그러나, 자망은 다른 어구에 비하여 어구의 비용이 적게 들고 소형 어선으로도 조업이 가능하므로 여전히 많은 수의 자망 어선이 전어가 연안으로 회유하여 오는 봄과 가을에는 선자망을 사용하여 조업을 행하고 있다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 한국어업기술학회 2000년도 춘계수산관련학회 공동학술대회발표요지집
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• pp.43-44
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• 2000

대형선망어선의 효율적인 운항과 조업방법 개선을 위한 기초자료로 활용하기 위하여 2000년 4월 3일~5일 제주도 성산포로부터 북동쪽으로 24mile 떨어진 위치(33$^{\circ}$43'.6N, 127$^{\circ}$09'.1E)에서 동원식품 소속 동원호선단의 선단조업시 레이더 화면에 나타난 어로과정의 영상을 디지털카메라로 촬영하여 플로피디스크에 저장하고, 그때 얻어진 디지털신호를 후처리하여 분석한 결과를 보고한다. (중략)

• Environmental and Resource Economics Review
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• 제19권4호
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• pp.771-804
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• 2010

This paper estimates optimal production of fish stock using discrete time bio-economic model to make zero profits or to maximize economic profits with maintaining sustainable resource levels under an open access and a sole owner. Particularly, this study generates optimal yields and efforts of large purse seine fisheries which catch mackerel and jack mackerel by using the logistic growth function, Cobb-Douglas production function, fisheries cost and profit functions. As a result, optimal yields of mackerel and jack mackerel under ecological equilibrium of a sole owner were approximately 172,512 tons and 16,937 tons respectively. Also, optimal fishing efforts of mackerel and jack mackerel under the same situation were about 8,508 hauls and 4,915 hauls respectively. In conclusion, the paper suggests that the large purse seine should reduce fishing efforts and increase fish stock to generate higher net present value in optimally managed fishery than that of the present large purse seine.

• Journal of Ocean Engineering and Technology
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• 제16권6호
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• pp.71-75
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• 2002

In this paper, a study on the principal performance of the purse seiner ship in two vessel formations was conducted. For this task, the outline of the purse seiner fishing system in two vessel formations was reviewed. At the same time, based on the general arrangement plan, hull from of the main vessel was developed. And the stability and ship motion characteristics of the ship design were estimated. Finally, to verify the characteristics of the resistance and self-propulsion coefficient, a model test in a circulating water channel was performed. As n result, it is anticipated that this presentation will be used as the foundation material for research of purse seiner.