• 수산경영론집
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• 제46권3호
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• pp.129-141
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• 2015

Because land based aquaculture is restricted by high investment per rearing volume and control cost, good management planning is important in Land-based aquaculture system case. In this paper master production planning was made to decide the number of rearing, production schedule and efficient allocation of water resources considering biological and economic condition. The purpose of this article is to build the mathematical decision making model that finds the value of decision variable to maximize profit under the constraints. Stocking and harvesting decisions that are made by master production planning are affected by the price system, feed cost, labour cost, power cost and investment cost. To solve the proposed mathematical model, heuristic search algorithm is proposed. The model Input variables are (1) the fish price (2) the fish growth rate (3) critical standing corp (4) labour cost (5) power cost (6) feed coefficient (7) fixed cost. The model outputs are (1) number of rearing fish (2) sales price (3) efficient allocation of water pool.

• 한국수산과학회지
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• 제38권1호
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• pp.70-77
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• 2005

This paper studied the feasibility for utilization of the automatic fishing information recording system, which stores and manages navigational information and fish catch results of a fishing vessel in a portable storing device, in order to help promote the systematic management of fishing information by offshore and coastal fishing vessels. Position accuracy was within 10 meters on the position accuracy experiment using GPS module. Characteristics of navigation according to the navigation, anchoring and fishing operation showed the difference of navigation track information for GPS, and fishing possibility of fishing boat could be estimated through the analysis as the utilization result of system for the large pair trawl and large purse seiners. In particular, it is impossible to provide false positional information by arbitrarily operating the system, and it may be possible to present the factual results of fish catch by date, fishing ground, and fish species by comparing the fishing information with fish catch. Such contents are considered to be useful as basic data for the management of fisheries resources.

• 한국환경생태학회지
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• 제30권1호
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• pp.104-109
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• 2016

정부는 해양환경복원과 수산자원을 회복하기 위해 1971년부터 2014년까지 약 44년 동안 222,627ha의 인공어초어장을 조성하였다. 그러나 인공어초 설치사업은 증가되고 있는 반면 아직까지 설치된 어초의 효과에 대한 연구는 부족한 실정이다. 이에 본 연구에서는 포항시 장길리 해역에 설치된 뿔삼각형어초에 부착 서식하는 저서동물의 시간적 군집변화를 살펴보기 위해 2003년 포항시 장길리 해역 수심 5~7m에 설치된 뿔삼각형어초를 대상으로 2009년 2월부터 2011년 8월까지 총 4회에 걸쳐 어초에 부착된 저서동물의 군집을 분석하였다. 그 결과 우점하는 분류군은 연체동물이고 우점종은 바다방석고둥인 것으로 나타났다. 또한 출현종들은 대부분 시공간의 변화에 따라 달라지는 양상을 보였다. 따라서 이 연구를 통해 시설해역과 목적하는 종의 특성에 적합한 인공어초 개발 연구, 사후관리에 관한 이용, 관리제도 제정 등에 활용될 것으로 기대한다.

• 한국양식학회지
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• 제20권3호
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• pp.173-177
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• 2007

희석액과 동해방지제로 각각 ASP와 DMSO를 사용하여 1년 동안 냉동보존한 후 해동한 강도다리(Platichthys stellatus) 정자의 운동속도는 10% 농도에서 가장 빨랐다. Methanol의 경우 $10{\sim}20%$ 범위에서 유의한 차이를 보이지 않았지만 15%에서 가장 높은 값을 보였다. Glycerol을 동해방지제로 사용하였을 때는 첨가농도가 높아질수록 정자의 운동성과 운동속도가 낮아졌다. 희석액으로 SS를 사용한 경우도 ASP와 비슷한 결과를 보였다. 투과형전자현미경으로 관찰한 냉동하지 않은 신선한 강도다리 정자는 머리, 중편부 및 꼬리로 구성되어 있으며, 치밀한 핵질로 충만한 구형의 머리에는 첨체구조가 관찰되지 않았다. 동해방지제 없이 냉동보존한 경우, 대부분의 정자들이 머리가 찌그러지거나 부분적으로 수축되는 경우가 많았으며 머리의 원형질막이 이탈되고 염색질이 과립상으로 변하거나 균질화되지 않았다. 반면에 냉동보존을 위해 동해방지제를 사용한 경우 부분적으로 정자의 구조적 손상이 관찰되었으나 대부분의 정자는 냉동과 해동과정에서 손상을 입지 않았다.

• 한국항해항만학회지
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• 제26권5호
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• pp.517-524
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• 2002

이 논문은 일본의 배타적 경제수역(EEZ)에서 한국어선의 피납실태를 분석하여 그러한 문제에 대한 대응방안을 제시하는 것을 그 목적으로 한다. 일본의 배타적 경제수역에서 벌어지고 있는 한국어선의 피납실태를 분석해 보면 우리나라의 어민들이 연근해 수산자원의 고갈과 해양오염으로 인하여 연근해조업이 곤란한 상황에서 수산자원이 풍부한 일본의 배타적 경제수역 경계선 부근이나 경계선을 침범하여 조업을 하고 있는 것으로 나타난다. 과거에는 그러한 행위가 관행상 자유로운 공해상의 조업이었지만 UN해양법협약(1994)과 한일어업협정(1999)이 발효함으로써 범법 행위가 되었다. 그러한 문제를 해결하기 위해서는 장기적인 관점에서 어업정책의 방향전환, 어민들의 생계대책마련 및 한일양국의 어업관리 협조체제의 구축이 필요하다. 무엇보다 당장 시급한 것은 외국에서 집행된 형의 감면이며, 어업지도와 단속을 위한 인적·물적 자원의 확충 및 해양경찰과 해양수산부의 긴밀한 공조체제 구축도 시급한 것으로 보인다.

• 한국수산과학회지
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• 제55권1호
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• pp.51-60
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• 2022

In Korea, the volume of imported fish for human consumption has been dramatically increasing every year. However, many Koreans are unable to distinguish imported fish from our domestic species. To reduce confusion and minimize the negative impacts on consumers, we reviewed the names of 100 imported fish species. We suggest new Korean names for 22 imported fish species. We also suggest altering the Korean names for three imported fish species. Finally, we suggest four novel ways to ensure the systematic and effective management of imported fish species.

• 수산경영론집
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• 제51권3호
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• pp.1-15
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• 2020

The Korean government has been carrying out the marine ranch development project since 1998 with the purpose of responding to the decrease in coastal fishery resources and fishery income, preparing a systematic management system for the sustainable use of fishery resources and realizing advanced fisheries power by expanding and upgrading fisheries resource development projects. In addition, the government established the Korea Fisheries Resources Agency and promoted projects for the protection and management of fishery resources by increasing basic productivity by artificially creating marine forests in areas where whitening events occur. Since the project of building marine ranches and marine forests requires immense government financial support, it is important to estimate the economic value and thoroughly evaluate the feasibility of the project. In this paper, the project of non-market economic value of the development of marine ranches and the development of marine forests was estimated. CVM (Contingent Valuation Method) was applied as a methodology for benefits estimation. Prior to the analysis, a one-on-one interview survey was conducted with participation of 512 residents and 514 residents respectively for the project of creating a marine ranch and developing a marine forest. A DBDC (Double-Bounded Dichotumous Choice) model was applied in the WTP (Willingness To Pay) analysis model and the socioeconomic variables of the surveyor, such as sex, age, education and income, were reflected in the model. The economic benefits from the two projects, namely, building of marine ranches and developing marine forests were estimated to be equal to 4,608 won and 7,772 won per household per year, respectively. According to the results of the survey, it seems that respondents think that marine forests are more valuable than marine ranches. This is as a result of ordinary citizens' thought that the marine ranches are more cost-effective than the marine forests. The benefits estimated through this study can be used for analysis of economic feasibility prior to carrying out the project of building marine ranches and developing marine forests, and are considered to be the valuable for policy-making purposes and finding social and economic consensus.

• 수산경영론집
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• 제42권3호
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• pp.15-29
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• 2011

The Fish Stock Rebuilding Plan (FSRP) is evaluated as one of the most effective fisheries policies domestically and internationally. FSRP is a comprehensive fisheries policy, including target stock size, rebuilding period, application of management measures, and participation of fishermen. The performance outcomes of FSRPs have been partially evaluated for recommendation for stock rebuilding in Korea, while they are fully evaluated in other countries that have implemented FSRPs. The performance evaluation system for FSRP is very needed to enhance its effectiveness as one of fisheries policies. That is, the system where problems can be reconsidered, achieving targets can be evaluated, and the plan can be modified should be implemented. This study classified the performance evaluation of FSRP into the economic evaluation as a quantitative analysis and the policy evaluation as a qualitative analysis. In the economic evaluation, the sustainability of fishery resources, the stability of fishing business, the efficiency of fishery production, and efficient utilization of fishery resources can be considered. As analytical methods for the economic evaluation, the bioeconomic model, efficiency estimation model, the dynamic MEY model can be utilized. The qualitative evaluation is to assess the qualitative performances of FSRPs, including interviews and surveys with fishermen and fisheries experts. In the survey, many different items can be included by evaluation factors which are related to policies such as timeliness, transparency, effectiveness, etc. In addition, the study suggested the performance evaluation system and procedures for objective and efficient evaluation of FSRPs. In order to practically apply the developed performance evaluation model, the pilot project is needed. That is, from the application of pilot project, detailed research methods, effective procedures, and evaluation factors can be investigated.

• 한국수산과학회지
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• 제38권4호
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• pp.232-238
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• 2005

This paper describes reproduction, population structure, growth and size at sexual maturity of a deep-water mud shrimp (Solenocera melantho) in the adjacent waters of Geomun Island, Korea. The shrimp was caught by a beam trawl from November 1998 to December 1999. Spawning period was estimated by gonadosomatic index to be from August to early November with a peak in October to early November. Female shrimps were $12\%$ matured at 16 mm in carapace length, $33\%$ matured at 18 mm and $75\%$ matured at 22 mm. The size at $50\%$ maturity for female was estimated to be 20.65 mm in carapace length. Breeding season was estimated to be from August to early November with a peak in October to early November. The size at $50\%$ inseminated was 19.81 mm CL. The fecundity was 87,500-405,200 and related exponentially to carapace length and total weight. This species survived between 25 and 26 months. The maximum carapace length of females and males were 48 mm and 34 mm respectively. Sex ratio was $51.3\%$, and the females were preponderant. Growth was estimated by modified von Bertalanffy growth function incorporating seasonal variation in growth in both years females (K=1.019/yr and $L_{\infty}$=51.731 mm CL) grew faster, reaching a larger size at a given age than males (K=1.848/yr, and $L_{\infty}$=27.499 mm CL). This is indicated by differences in growth performance indices $(\varphi')$ between females (3.291) and males (3.145).

• 해양환경안전학회지
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• 제26권3호
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• pp.242-253
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• 2020

This study examined the ef ects of freshwater discharge by artificial dikes from the Kanwol and Bunam lakes on the dynamics in the Chunsu Bay, Yellow Sea, Korea, during the summer season based on three-dimensional numerical modeling experiments. Model performances were evaluated in terms of skill scores for tidal elevation, velocity, temperature, and salinity and these scores mostly exceeded 90 %. The variability in residual currents before and after the freshwater discharge was examined. The large amount of lake water discharge through artificial dikes may result in a dramatically changed density field in the Chunsu Bay, leading to an estuarine circulation system. The density-driven current formed as a result of the freshwater inflow through the artificial dikes (Kanwol/Bunam) caused a partial change in the tidal circulation and a change in the scale and location of paired residual eddies. The stratification formed by strengthened static stability following the freshwater discharge led to a dramatic increase in the Richardson number and lasted for a few weeks. The strong stratification suppressed the vertical flux and inhibited surface aerated water mixing with bottom water. This phenomenon would have direct and indirect impacts on the marine environment such as hypoxia/anoxia formation at the bottom.