• Title/Summary/Keyword: fishing ground

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TEMPORAL AND SPA TIAL VARIATION OF NIGHTTIME FISHING GROUND DERIVED FROM SATELLITE IMAGERY

  • Kim Sang-Woo;Jeong Hee-Dong;Suh Young-Sang;Go Woo Jin;Jang Lee-Hyun
    • Proceedings of the KSRS Conference
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    • pp.437-440
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    • 2005
  • We examined the relationship between the 50m temperature estimated by remote sensing sea surface temperature (SST) and fishing ground (squid fishing ground) detected by nighttime visible channel defense meteorological satellite program (DMSP) I operational linescan system (OLS) images in the East/Japan Sea during 1993-2000. The results are as follows: The numbers of nighttime fishing boat were distributed the highest in October, and the lowest in April during this study. A nighttime fishing grounds have concentrated in the East Korea Warm Current region, coastal regions of Honshu Island, and Polar front region. Fishing grounds have distributed $11-18^{\circ}C$ of estimated 50m temperature from the satellite data. Relationship between estimated 50m temperature and the distributed fisheries boats showed that the north boundaries of fishing grounds have distributed the temperature of below $12^{\circ}C$ from 1996 to 2000 and that of $13-15^{\circ}C$ during 1993-1995 and 1997-1999. Stable fishing grounds appeared near the Korea/Tsushima Strait from January to March. The center of fishing grounds in spring (April-Jun) have moved to the northward than that in winter, and variations appeared largely in winter. In summer (July-September), center of fishing grounds have formed near the Uleung Island in the south east coast of Korea, and in autumn maximum fishing ground appeared in October, the fishing ground southward from November.

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A Study on the Fishing Ground Location (어장입지에 관한 고찰)

  • 강연실
    • The Journal of Fisheries Business Administration
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    • v.17 no.1
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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.

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Variation of fisheries conditions of mackerel (Scomber japonicus) fishing ground for large purse seine fisheries (대형선망어업에 있어서 고등어 (Scomber japonicus) 어장의 어황변동)

  • Lee, Haet-Nim;Kim, Hyung-Seok
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.47 no.2
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    • pp.108-117
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    • 2011
  • In order to offer data about fisheries resources management and prediction of catch on large purse seine fisheries, the fluctuation of the fisheries condition and distributions of fishing ground for mackerel were analysed with monthly catch data for 1990.2009. The overall catch has decreased to about 70% since 1997, with approximately 70% of the mackerel (Scomber japonicus) catch and monthly fluctuations showing a similar pattern. Monthly distribution of fishing ground is like distribution of mackerel in large purse seine fishery. The main fishing grounds are near Jeju Island and the Yellow sea with the main fishing season existing between October to December. The catches fluctuations and distribution of fishing ground were related to the effect of regime shifts. Therefore, in order to prediction of catch on large purse seine fisheries should be studied these relationships.

Proposed optimal fishing-ground plan to increase productivity in the Ki-jang coastal region of Busan, Korea (양식어장 생산성 향상을 위한 적정배치방안-부산 기장연안을 중심으로-)

  • Yoon, Han-Sam;Kim, Heon-Tae;Ryu, Cheong-Ro;Kim, Young-Po
    • Journal of Fisheries and Marine Sciences Education
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    • v.17 no.3
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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.

A Study on Influential Factors of Conflict Management of Government Policies in Oil Spill Sites -Focusing on the restoration project for oil pollution in Taean-gun (유류피해지역의 정부정책에 대한 갈등관리 영향요인에 관한 연구 -태안군 유류피해복원 사업을 중심으로-)

  • Jang, Young-Soo
    • The Journal of Fisheries Business Administration
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    • v.42 no.3
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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.

Sustainable Utilization and Management Scheme in Wangdol-cho Surrounding Sea Area (동해 왕돌초 어장의 지속적 이용 및 관리 방안)

  • Lee, Kwang-Nam;Myoung, Jung-Goo
    • Ocean and Polar Research
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    • v.25 no.3
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    • pp.331-345
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    • 2003
  • The fishing ground surrounding Wangdol-cho is not only overexploited by the littering of dilapidated fishing net and equipment, but also by fishermen's overfishing, surpassing optimum fisheries resources. In addition, increasing fishing efforts (number of fishing vessel and fishing net, etc) contribute to the deterioration of fishing ground, and it is urgently required that schemes to tackle the problems should be taken. To effectively address the problems as such, this paper aims to propose sustainable utilization and management scheme of fishing ground through classification of fishing ground surrounding Wangdol-cho as one area which is less than 50m deep, measuring $13.66km^2$ and the other, permission fishing area of Gill Net fishery, measuring $347.23km^2$. The analysis shows that, for the water area less than 50m deep, implementation from a short-term perspective includes autonomous management fishery by gill net and trap fishery. For the permission fishing area of Gill Net fishery, implementation includes limit on fishing period, real name system of fishing equipment and limit on fishing equipment. Implementation from a medium and long-term perspective includes limit on scuba diving, designation of underwater sightseeing zone, sea farming, facilities of surveillance, adoption of approval system for the permission fishing area of Gill Net fishery and introduction of report system for fishing.

A Comparative Study of the Co management of Fishery Right by Fisheries Cooperatives - Centered on the Management of Fishing Ground through Eochon-gye - (수산업협동조합의 어업권관리기능에 대한 비교 연구 -어촌계의 어장관리활동을 중심으로-)

  • 최정윤
    • The Journal of Fisheries Business Administration
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    • v.29 no.2
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    • pp.21-46
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    • 1998
  • The government is largely responsible for preventing “the tragedy of the common property”, but fisherman's effort fer an autonomous fishery control is equally required. Especially in these days of EEZ such self- regulated fishery management system should be developed and cared for as well. This study aimed to explore a proper management system for coastal fishing ground that now requires the responsible fisheries management by investigating and analysing more drastically the managerial functions of fishery right by Eochon-Gye(the smallest unit of fisheries cooperative based on a fishing village), a typical fishery producer's organization in Korea. This study also included such contents as (1) an understanding of fishery producer's organization, (2) the utilization and management system of coastal fishing ground, (3) the actual condition of fishing right distribution in Korea, (4) the fishery right management and activity of Eochon-Gye, (5) the operation and distinctive feature of fishery right in Japan, (6) the intervention and limit of fishery producer's organization for fishing ground management function, and (7) summary and proposal. We made all Eochon-Gye of the whole country an object of this study and carried out an investigation into Eochon-Gye through a questionnaire. We extracted 359 Eochon-Gye, 20% of the total 1,719 Eochon-Gye as a random sample and investigated these regions through a questionnaire by mail. The contents of the questions consist of 40 items, including six categories about the organization of eochon-gye, and fishing ground management and activities.

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Detection, Identification and Surveillance System Development of Illegal Fishing Vessels in Inshore Fishing Ground (연안 어장에서의 불법 조업 어선의 탐지, 식별 및 감시 시스템 개발)

  • LEE Dae-Jae;KIM Kwang-Sik
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.37 no.4
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    • pp.337-344
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    • 2004
  • A real-time surveillance system of the inshore fishing ground was constructed to identify and detect discrete targets, such as illegal fishing vessels. This paper describes measurements made with a combination of sensors, such as radar, CCTV camera, and GPS receivers, for monitoring the fishing activity of small vessels within the fishing limit zones of the inshore waters. The CCTV camera system was used to confirm detection and to classify the type of target. The location of legal vessels distributed in coastal waters was acquired from each GPS system of ships connected to commercial satellite communication network. The surveillance system was networked via LAN to one host PC with the use of electronic navigational charts (ENC) and a radar link. Radar Target Extractor (RTX) for radar signal processing can be remotely accessed and controlled on existing PC via the internet, from anywhere, at any time. Results are presented that demonstrate the effectiveness of the newly constructed fisheries monitoring system for conducting continuous surveillance of illegal fishing vessels in the inshore fishing ground. The identification of illegal fishing vessels was achieved by comparing radar positions of illegal fishing vessels exceeding the warning limits in the surveillance area with GPS position reports transmitted from legal fishing vessels, and the illegal fishing vessels were marked with red symbols on the ENC screen of a PC. The methods to track the activities of all vessels intruding or leaving the fishing limit zones also were discussed.

Changes in fishing grounds of four drag-bagnet fisheries in Korean waters (2008-2014) (한국 근해 저인망류 4개 어업의 어장 변화(2008-2014))

  • CHOI, Jung Hwa;INTELMANN, Steven S.;MCCONNAUGHEY, Robert A.
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.57 no.2
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    • pp.93-106
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    • 2021
  • Changes in the fishing grounds for four drag-bagnet fisheries (large trawl, large pair trawl, large Danish seine and middle Danish seine) were investigated by year and sea-blocks in Korean waters. We used catch and effort data by sea-block (latitude × longitude: 30' × 30') of the National Institute of Fisheries Science (NIFS) and yearly fishing production statistics of the Korean statistic information service from 2008 to 2014. The main benthic habitat of fishing ground was sand and sandy mud material. The average swept areas for the four fisheries were 181.7 km2, 606.4 km2, 2,720.9 km2 and 252.8 km2, respectively. The main fishing ground was around Jeju Island and the eastern South Sea. The main fishing ground moved to the northern part of the South Sea during the study period due to a closure of fishing grounds and changes in the target species.

Changes in fishing characteristics and distributions of Korean tuna purse seine fishery by oceanographic conditions in the Pacific Ocean (태평양 수역 우리나라 다랑어선망어업의 조업 특성 및 해양환경에 따른 어장 변동)

  • LEE, Mi-Kyung;LEE, Sung-Il;LEE, Chun-Woo;KIM, Zang-Geun;KU, Jeong-Eun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.52 no.2
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    • pp.149-161
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    • 2016
  • Fishing characteristics of Korean tuna purse seine fishery in the Pacific Ocean were investigated using logbook data compiled from captain onboard and the statistical data from 1980 to 2014. Changes in fishing ground and correlation between marine environmental factors and fishing patterns were investigated using Oceanographic index. The proportion of unassociated set was higher than that of associated set. The catch proportion of yellowfin was higher in the unassociated set, while that of skipjack and bigeye was higher in the associated set. Due to vessels, fishing gears and Korean captains' high-level of skills in fishing technology optimized for the unassociated set and preference of large fishes, especially large yellowfin tuna, it showed unique fishing characteristics focusing on the unassociated set. As for fishing distributions of Korean tuna purse seine fishery and impacts of oceanographic conditions on the fishery, the main fishing ground was concentrated on the area of $5^{\circ}N{\sim}10^{\circ}S$, $140^{\circ}E{\sim}180^{\circ}$ through the decades. When stronger El-nino occurred, the range of fishing ground tended to expand and main fishing ground moved to the eastern part of western and central Pacific Ocean. During this season, yellowfin tuna had high CPUE and catch proportion of yellowfin tuna in the eastern part also increased. As for the proportion of fishing effort by set type, proportion of log associated set was high during El-nino season while that of FAD associated set was high during La-nina season.