• Title/Summary/Keyword: Fisheries resource

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A Study on the Economic Feature of Fisheries Resource and Socio-economic Objectives in Fisheries Management (어업자원의 경제적 특성과 그 관리의 사회.경제적 목표에 관한 연구)

  • 유동운
    • The Journal of Fisheries Business Administration
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    • v.12 no.2
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    • pp.73-100
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    • 1981
  • Fisheries resources, due to their intrinsic biological -density dependent, and socio- economic -common property nature, might yield the sustained benefits to the society involved, depending on the degree to which the social management scheme, pursuing the optimum yield from each of them, is framed. And besides, the success or failure of the management on them would, with no doubt, lead parallelly to the direction on scientific study of "Natural Resource Economics." Thus the objectives of the management, to ensue the best use of these society's resource, should underlie the technical, economic, ana social efficiency all together to meet the maximization of society's benefits from yields, taking account of managerial efficiency. And those multiple conflicts need communications between biologists, social scientists, and managers given tile mandate, tobe coordinated to arrive at a unique value weighed, through the well-ordered system approach and resulting timely decision-making which accommodates dynamical fisheries aspects and varying social purposes. purposes.

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A study on improvement of the lower canvas bar for reducing loss of stow net on anchor (안강망 어구의 유실 감소를 위한 하부 종대의 성능 개선 연구)

  • LEE, Gun-Ho;CHO, Sam-Kwang;KIM, In-Ok;CHA, Bong-Jin;JUNG, Seong-Jae;KOO, Myeong-Seong
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.54 no.4
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    • pp.271-278
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    • 2018
  • In this study, the conventional cylinder-shaped lower bar on the canvas was modified and its performance was tested to improve the opening force of the stow net on anchor. The improved new lower bar used in the test is consisted of 13 flat bars with a length of 1.8 m, a width of 0.075 m and a thickness of 4 mm, and a pipe with a length of 2.0 m and a diameter of 50 mm. A stow net with the improved lower bar and a stow net with an existing lower bar were installed underwater and their trajectories for 21 hours were examined. To confirm their trajectories, GPS loggers were attached to the buoys on the left and right canvases and the buoy of the hauling rope. As a result of the test, the rotation of the gear with the improved bar was smoother than that with the existing bar. As a result of comparing the changes in the interval of the buoys attached to the canvas after the low and high tide, the buoy spacing of the gear with the improved bar is wider than that of the conventional gear; moreover, the larger the interval, the smoother the rotation of the fishing gear was. Therefore, it is considered that using the improved lower bar can enhance the performance of the stow net.

Age and Growth of Daggertooth Pike Conger Muraenesox cinereus in the South Sea of Korea (한국 남해에 분포하는 갯장어(Muraenesox cinereus)의 연령과 성장)

  • Koh, Eun Hye;Kwon, Dae-Hyeon;Kim, Yeonghye
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.6
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    • pp.650-655
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    • 2019
  • The age and growth of Muraenesox cinereus collected in the South Sea of Korea by Danish seine and coastal Long-line fisheries were determined from right sagittal otoliths between May 2018 and April 2019. Otoliths of 353 fish were observed under reflected light, and the edges of the opaque zone were considered to be the otolith ring. Monthly changes in the marginal index indicated that rings (opaque zones) were formed once a year from June to July. The estimated von Bertalanffy growth equation with growth parameters estimated from non-linear regression were Lt=138.37 (1-e-0.18(t+0.79)) for females and Lt=99.00 (1-e-0.13(t+3.99)) for males. The oldest female M. cinereus was 12 years old, and the oldest male was 8 years old.

Evaluation of Bacteriological Safety for the Shellfish Growing Waters in Taean Area, Korea (충남 태안 패류생산해역에서의 세균학적 위생안정성 평가)

  • Song, Ki-Cheol;Lee, Doo-Seog;Shim, Kil-Bo;Lim, Chi-Won;Mog, Jong-Su;Byun, Han-Seok;Park, Young-Je;Cho, Ki-Chae
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.41 no.3
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    • pp.155-162
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    • 2008
  • The seawater in the Taean area was surveyed to evaluate the conditions of the bay and compliance with the bacteriological criteria for a designated area for shellfish production for export. Samples of seawater were collected monthly at 34 sampling stations established in the survey area from January 2002 to December 2004. The bacterial density in the coastal area close to a pollution source located to the northeast of the survey area was higher than in the open sea to the west. The bacteriological counts in the water did not change with 16.5mm of rainfall, but increased abruptly after 65.4mm of rainfall. The total coliform and fecal coliform most probable numbers (MPNs) of 1,224 seawater samples in the survey area were <1.8-2,400 and <1.8-790 MPN/100 mL, respectively. The geometric mean and estimated 90th percentile of total coliforms were 1.9-3.4 and 2.7-26.3 MPN/100mL, respectively, and for fecal coliforms were <1.8-2.6 and 1.8-12.0 MPN/100mL, respectively. The bacteriological water quality in the Taean seawater area met the National Shellfish Sanitation Program criteria for an approved area and the Korea Shellfish Sanitation Program criteria for a designated area for shellfish production for export.

First Record of the Trans-Pacific Sebastes, S. glaucus(Scorpaeniformes: Scorpaenidae) in the Korean Waters (한국산 환태평양 볼락속(Genus Sebastes), Sebastes glaucus의 최초 보고(쏨뱅이목: 양볼락과))

  • Jeong, Moon Kyung;Ji, Hwan Sung;Kim, Jin-Koo;Lee, Sujin;Hwang, Seon Jae;Hwang, Kangseok;Park, Jeong-Ho
    • Korean Journal of Ichthyology
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    • v.28 no.4
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    • pp.283-286
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    • 2016
  • A single specimen (276.9 mm standard length) of the scorpaenid Sebastes glaucus was collected by a gill net from Dokdo, East Sea, Korea. The specimen is characterized by yellowish brown body color, deep body, convex frontal region and nape, board occipital region, 14 spines at dorsal fin, and no scales at maxilla. This is the first record of S. glaucus in Korea; we therefore add the species to the Korean fish fauna. According to the NFRDI (1999), we propose the Korean name, "Cheong-hoebol-rak" for this species.

New Record of the Opah, Lampris guttatus (Lampriformes: Lampridae) from East Sea, Korea (한국산 붉평치과 (Lampridae) 어류 1 미기록종, Lampris guttatus)

  • Jeong, Moon Kyung;Shin, Donghoon;Kim, Maeng Jin;Jo, Hyun-Su;Hwang, Kangseok
    • Korean Journal of Ichthyology
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    • v.27 no.1
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    • pp.55-59
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    • 2015
  • A single specimen (705 mm in standard length) of Lampris guttatus ($Br{\ddot{u}}nnich$, 1788), belonging to the family Lampridae, was firstly collected from the coast of Samcheok, East Sea, Korea in November 2014. This species was characterized by having oval shaped body, vivid scarlet fins and jaw and pale white spots on body irregularly. We propose a new Korean name, "Buk-pyeong-chi-gwa", "Buk-pyeong-chi-sok" and "Buk-pyeong-chi" for the family, genus and species, respectively.

Understanding the seasonal status of fisheries resource in the East China Sea by using bottom trawl (저층트롤을 이용한 동중국해 해역의 계절별 수산자원 현황)

  • Hyoung-Ho SHIN;Jungkwan LEE;Geunchang PARK;Byeong Gwon LIM;Doo Jin HWANG;Kyounghoon LEE
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.59 no.3
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    • pp.231-241
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    • 2023
  • This study was investigated in order to find composition and density of fisheries resource using bottom trawl in April, July, August, and November 2022 in the East China Sea. The average density of fisheries resource was estimated using the swept area method. As a result, 35 species were collected from the East China Sea. These included 21 fishes, six crustaceans, six cephalopods and two echinoderms. Seasonally, the average density of crustacean individuals per unit area were highest in November (692.1 inds./km2), while cephalopod individuals per unit area were highest in August (39.4 inds./km2). The average density of fish individuals per unit area were highest in August at 355.0 (inds./km2).

A Study on the Construction of the Multiple Fishery Cooperation System Between Korea, China and Japan (한.중.일 다자간 어업협력체 구성방안 연구)

  • Shim, Ho-Jin
    • The Journal of Fisheries Business Administration
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    • v.39 no.2
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    • pp.81-108
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    • 2008
  • Since the declaration made by UN Convention on the Law of the Sea on EEZs, The open seas of Northeast Asia, considerd as a convention area, needed new agreements in conformity with the changes brought by the introduction of the Exclusive Economic Zone(EEZ) system. The Contracting Parties of these agreements set up their own EEZs, which extend certain ranges from their baselines, Fishing in the other party's EEZ is done based on mutual agreements, which take into account traditional fishing activity in the zones. Seperate fishries management systems, in accordance with the relevant legal status of the waters, are applied to individual overlapping areas: Middle Zone in the Bast Sea and the waters south of jeju Island, Interim Measure Zone in the Yellow Sea and East China Sea, and the Transitional Zone in the Yellow Sea. They decided to conclude fisheries agreements as the provisional agreement under Article 74(3) of the UN Convention before the delimitations of the EEZs to avoid the territorial disputes. China and Japan concluded the Fishries Agreement in the November 1997, allowing each coastal State 52 mile EEZ. it was followed by Korea and Japan in September 1998, reaching a final compromise. And also Korea and China came to a satisfactary settlement in November 1998. Fisheries agreements have been established between the three North-east Asian States, the agreement are all bilateral. That implies inefficient resource management on the overlapping waters of the three states, especially on the East China Sea. The Korea-Japan Fisheries Agreement and the China-Japan Fishery Agreement worked as governing rules in the North-east Asian seas before the establishment of EEZs (Exclusive Economic Zones). However the conclusion of the bilateral fishery agreements, Korea China and Japan have developed EEZs, and these three countries have competed for the exploitation of fisheries resources. Therefore, the issue of fisheries resource management was no longer a single countries' problem and emerged as a common issue facing these three countries. In recognition of the above-mentioned problem, it is needed for the construction of cooperative System fishery management in the North-east Asian seas. Therefore, cooperative measures should be establishied. The final goal of the construction of fisheries management cooperative system is to establish sustainable fisheries in the North-east Asian seas. However, there is a big difference in fisheries management tools, fishing gear, exploitation rate of species, etc. This implies that a careful approach should be taken in order to achieve the cooperative fisheries management among Korea, China and Japan. conclusionly, the Governments of Korea, China and Japan should complement three bilateral agreemens, and which they prepares to 'Fisheries Resource Restore Program' Between Korea, China and Japan in the adjacent waters south of Jeju Island.

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A Study on the Transition Situation of Korean-Japan Fisheries Agreement and Improvement Issue of Bilateral Fisheries Relations (한일 어업질서의 이행 실태와 어업관계의 개선 과제)

  • Kim, Dae-Young
    • The Journal of Fisheries Business Administration
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    • v.47 no.1
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    • pp.31-45
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    • 2016
  • This study aims to evaluate the status of implementation of bilateral-fishery order since the Korea-Japan Fisheries Agreement came into effect in 1999 in order to improve fisheries relationships between two countries. The agreement regulates bilateral-fishery order by the principle of the EEZ regime and mutual benefits among countries. (e.g. the mutual agreed fishing in EEZ and cooperation for resource management). However, the Korea-Japan Fisheries Agreement has some limitations such as reducing quotas of the mutual agreed fishing in EEZ, strengthening Japanese fisheries regulation, insufficient cooperation for fisheries management and joint countermeasures. In order to improve fisheries relationships between the two countries, it is imperative to rebalance quotas for the mutual agreed fishing in EEZ, to establish effective resource management systems in the Intermediate zone, to invigorate fisheries cooperation in the private sector, and to introduce new management systems by species over the all waters around East Asia. To accomplish such measures, it is necessary for Korean and Japanese governments to improve fisheries relationships based on trust and cooperation, achieving a win-win situation. Additionally, it is required to incorporate fisheries management among Korea, China, and Japan.