• 수산경영론집
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• 제42권3호
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• pp.63-78
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• 2011

This study looked into conflicts of government policies for oil spill sites which are focusing on Taean-gun after the oil spill in Taean-gun and examined the effects on the conflicts. There are lots of conflicts on the on-going restoration project of fishing ground environment(fishing ground inspection, restoration program development, improvement in fishery biology ecosystem and fishery productivity). For example, these show diverse conflicts between business associates, project processes, business subjects, project participation, and the use of fishing ground. This study found out the first reason of dissatisfaction and conflicts is that there is a difference between groups in terms of political aims and perception. Secondly, lack of communication and cooperation between the center and the provinces, organizations in the provinces, the local government and fishing village cooperatives, fishermen in the fishing industry. Thirdly, the local government and the fishing village head don't show their leadership to improve project performance.

• 수산해양기술연구
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• 제42권1호
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• pp.19-29
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• 2006

To investigate the fishery and fishing ground environment of red horsehead (Branchiostegus japonicus), the author analyzed the fishery data and examined the amount of catches and oceanic environment on the adjacent seas of Jeju island and East China Sea. It was turned out that the favourable season of the red horsehead fishery is the month from March to June, the main fishing ground is located in 60 mile radius from the position $32.5^{\circ}N,\;125.7^{\circ}E$. The bottom seawater temperature in fishing ground was shown between $l3^{\circ}C\;and\;16^{\circ}C$, the salinity was appeared between 33.5 and 34.0psu without the seasonal variation of the year. Concentrations of materials(e.g, $NO_3^-\;and\;NO_2^-$) in spring and summer time in main fishing ground were higher than any other seasons, but that of phospheric materials were lower than any other seasons. Concentrations of $chlorophyll\;-\;{\alpha}$ in the main fishing ground was the highest in spring and summer at the surface layer, but the vertical profile of the $chlorophyll\;-\;{\alpha}$ concentrations in all seasons were not variable at bottom layer. Mean density of zooplankton abundance according to the vertical structure was higher and much stable in summer and autumn than spring and winter.

• 수산해양교육연구
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• 제17권3호
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• pp.361-372
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• 2005

The purpose of this paper was to examine the status of unlawful actions in the fishing grounds located in the Ki-jang coastal region of Busan, Korea, and to develop an optimal fishing-ground plan that will increase the productivity of fisheries resources. We examined the impacts of important factors influencing the basic environment of the fishing grounds at the study site, as including the physical environmental conditions of water temperature and qualies. In addition, we administered a survey that focused on the necessity of enhanced maintenance of the fishing grounds at this site. As a result, we identified some required management action for the fishing grounds and proposed an optimal fishing-ground plan to increase productivity in the Ki-jang coastal region of Busan.

• 수산경영론집
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• 제17권1호
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• pp.1-17
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• 1986

Since the middle of the 70s, the countries with the marine resources declared the exclusive water zone of two hundred miles. As a result, our country lacked many foreign fishing grounds. This awakened our perception of fishing grounds. The fishing ground is an important factor in the economical effectiveness of fisheries. The fishing ground must have the following basic conditions. 1. It must be the place the fishery resources inhabit and wander. 2. Their catching or aquaculturing must be possible by the technical methods. 3. It must have economic worth in the management. The fishing ground that achieves the above basic conditions is affected by the following factors. This is the factor of the fishing ground location. A. Natural factor 1). Suitable climate 2).Abundant resources 3). Good quality of the sea-bottom 4). Not to be pollutted area B, Economic factor 1). Be adjacent to fishing port and fisheries market 2). Good working conditions 3). Be abundant of economical resources C. Social factor 1). Be possible to work legally 2). Be permitted in the political relations 3). Be acquainted with the customs of foreign countries The fishing ground location is mainly affected by the natural factor of the above factors. The abundance of resources depends on the natural resources. The resources in the fishing ground have the cycle of developing period, maturing period, and decaying period according to the fishing efforts. The point that we sustainably yield the maximum of fishery resources is the changing point of maturing period and decaying period. We call this point MSY, so the resources of fishing ground should be managed by the MSY. Therefore, when we select the fishing ground location. We should judge the natural factor, the economic factor and the social factor synthetically according to the situation and environment, so we can achieve the efficient management.

• 수산해양기술연구
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• 제47권4호
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• pp.403-410
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• 2011

Catches, CPUE, fishing season, disc width composition and fishing ground were studied to rebuild skate ray, Raja pulchra resource by the offshore longline fishery in Heuksan-do, Korea. Annual catches and CPUE of skate ray were increased from 2003 to 2010 (CPUE: from 2007 to 2010) continuously. The main fishing season of the skate ray was from December to next May. Disc width at 50% maturity for Raja pulchra by sex were estimated to be 65.83cm, 57.01cm by female and male respectively. The range of disc width was 22.3-112.0cm and the average disc width was 66.9cm, 60.0cm by female and male of Raja pulchra respectively during 2007-2010. Annual average of disc width of female skate ray was decreased from 2007 to 2010. The fishing grounds were formed from the coastal water off Hong-do to the coastal water off Gyeogyeolbiyeol-do, Korea. The center of fishing ground in October was formed in the northwestern coastal water off Gyeogyeolbiyeol-do and separated from that of the other months.

• 수산해양기술연구
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• 제47권1호
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• pp.18-26
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• 2011

This study is to contribute to income growth of fishermen by the common octopus fishery characterized in the Tando Bay on the southwest coast of Korea. This area is engaged in Longline fishing (301 persons), Shovel fishing (196 persons), Trap fishing (14 persons) and Torch light fishing (40 persons) in 2008. Population who is joined in the spring becomes main fishery target population of longline fishery in the fall because entering fishing ground in August, and is joined in the fall becomes main fishery target population of longline fishery in the spring because entering fishing ground in December. Average size of common octopus examined by longline 6.26cm, 5.82cm for Shovel fishing, 8.09cm for trap, and expressed big difference by fishery. It needs necessary various kinds of Octopus resource management actions and methods in continuous use. Specially, Fishing force increased by fishing automation system, so the reduction of fishing force is needed to increased by fishing force. Government support and fishermen's self-conscious of resource management is needed.

• 한국환경과학회지
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• 제22권10호
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• pp.1363-1371
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• 2013

In this study, we estimate the interannual spatial and temporal distributions of fishing grounds at night in the East Sea based on satellite and in-situ data. We observe that the $15^{\circ}C$ thermal front moves in the north-south direction according to the movement of the warm water (above $18^{\circ}C$) in the Tsushima Warm Current (TWC) area, forcing the cold water area (below $10^{\circ}C$) to either expand or shrink. The interannual variations of sea surface temperature (SST) in winter represented by the indicator SST of $6^{\circ}C$ are consistent with the east-west zonal areas in the central East Sea which represented over $1^{\circ}C$ standard deviation of SST in February during 1990-2000. Annual SST in the fishing grounds of common squid fishing vessels, observed both by fishing vessels and satellites range from 9-$22^{\circ}C$, with the satellite-observed data having a larger range than the fishing vessel-based ones. The interannual distributions of the common squid fishing grounds in the East Sea are mostly concentrated in the TWC area in the southwestern part of the East Sea and in the coast of southern Honshu and Hokkaido in Japan. The interannual distributions of the nighttime fishing vessels are consistent with the catches investigated from the fishing vessel.

• 수산해양교육연구
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• 제21권4호
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• pp.568-575
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• 2009

On the conflict factors in using community fishing ground and their solutions, some conclusions are derived with the survey for fishing villages, residents, tourists as follows: Jeju Island has beautiful sceneries with seas in all the directions and so remarkable potential as personal experience fishing village. For sustainable development of ecological tourism in each fishing village, systematic, long-term development plans and management systems through decision making with residents in fishing and non-fishing villages are demanded. For tourist development of fishing village, protection management systems for marine and swampy land are needed first of all. Next, economical profit and the participation of resident have first priority, and also individual standards for each village are urgently prepared based on the results of basic research on each village. Finally, educations on environment and fishing village with professional tourist guide are needed. Ecological protection, environmental education, resident participation, local government's concern, and financial support could solve residential conflicts and make Jeju Island a Mecca of local fishing village tourism.

• 수산해양기술연구
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• 제37권1호
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• pp.9-17
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• 2001

우리나라 동해안 명태어장의 어업환경 개선을 위한 기초연구로서 , 1998년 6, 7월과 1999년 5, 7, 8월에 걸쳐서 강원도 고성군 근해에서 사조묘로 수거 한 침체어구의 실태를 조사·분석하였다. 1. 폐어구는 어업활동에 의해서 발생된 것으로 저자망과 통발의 2종류였다. 2. 폐어구의 무게는 저자강이 1,170 t,통발이 4 t 으로, 저자망이 압도적으로 많았다. 3. 마일당 저자강의 수거량은 1998년 22.74 t에서 1999년 10.72 t 으로 12.02 t 감소 하였다. 4. 폐어구 수거율은 1998년 38.0%, 1999년 41.9%로 낮았고 CPUE는 1998년 11.27 t /회, 1999년 7.48 t /회이었다. 5. 사조묘에 의한 본 조사방법은 어장에서 발생한 침체어구의 수거에 유효한 수단이라고 생각된다.

• 수산해양기술연구
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• 제46권4호
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• pp.441-448
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• 2010

This paper was concentrated on the distribution and the composition of lost fishing gear on the sea bed around yellow croaker fishing ground in the near sea of Jeju, Korea from April to October 2009 in order to improve the fishery environment. Recovering lost fishing gears was carried out total 10 times with a trawlnet along the isobath. As the result, it seems reasonable to conclude that the amount of lost fishing gear has a deep connection with the dip of the sea bed as well as the fishing gear scale, fishing ground and so on. The amount of recovered lost fishing gears were in order of gillnets, dragged gears, traps and ropes. In particular, traps were recovered almost every time within the survey area.