• 한국수산과학회지
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• 제47권6호
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• pp.945-959
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• 2014

This study was conducted to provide basic data for optimal fisheries management through the accurate understanding the catches, fishing level, species composition, distribution characteristics and fisheries status of trammel net in Gangwon Province. As the results of trammel net survey, Pisces were collected 77 species, 1,983.0 kg, Crustacea 9 species, 569.0 kg, Cephalopoda 5 species, 75.3 kg, Gastropoda 12 species, 16.5 kg in the coastal waters of Sokcho and Pisces 55 species, 3,681.5 kg, Crustacea 6 species, 2,229.8 kg, Gastropoda 10 species, 72.8 kg, Cephalopoda 4 species, 10.1 kg in the coastal waters of Donghae, respectively. The catches of important species with season and depths showed that the main target species is Pleuronectidae spp. at all depth and Aptocyclus ventricosus at <100 m in Sokcho, Liparis spp. and Dasycottus setiger at 200-500 m in Donghae, respectively. The mean total length (cm) of Gadus macrocephalus and Aptocyclus ventricosus didn't appear significant difference, but the mean total length of Pleuronectidae spp., Liparis spp. and D. setiger in Donghae is bigger than in Sokcho. From the cluster and MDS analysis based on Bray-Curtis similarity matrix of fourth root transformed, catches data of dominant species in the coastal waters of Sokcho and Donghae was divided into three different groups of the demersal organisms community in 12 survey of Donghae (Group A) and Jul., Oct.-Dec. survey of Sokcho (Group B) and Jan.-Jun. and Aug.-Sep. survey of Sokcho (Group C).

• 수산해양기술연구
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• 제50권4호
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• pp.455-466
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• 2014

Seasonal variations in species composition of catches were explored using seasonal samples caught by shrimp beam trawl in the Geum river estuary in 2011. During the study period, total catches were collected 91 species as fish 47 species, crustacean 28 species, mollusca 4 species, gastropoda 5 species, shellfish 3 species and others 4 species. The dominant species were Exopalaemon carinicauda, Eriocheir leptognathus, Palaemon gravieri, Mugil cephalus, Acanthogobius hasta, Cynoglossus joyneri, Pennahia argentata and Coilia nasus. The amount of species in spring and summer was higher than in autumn. The diversity index (H') was 0.43~0.96, evenness index (EI) was 0.14~0.25, and richness index (RI) was 1.54~4.25. Using cluster analysis 91 species were divided into 4 groups. Group I appeared mainly in spring and summer. Group II appeared only in summer. Group III appeared in winter and spring, and Group IV in spring and autumn.

• 수산해양기술연구
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• 제18권1호
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• pp.25-33
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• 1982

동지나해.황해의 최근 10개년간(1970~1979) 안강망에 의한 참조기.강달이 어획자료를 이용하여 어획량.어장의 경년변동과 저층수온과의 관계를 조사하였다. 그 결과, 1970~1976년간의 어획량은 수온보다 2~3년 늦은 위상(Time lag)을 가지고 변화하였다. 1970~1973년은 감소, 1974년 초~1975년 말은 급격한 증가, 그리고 그 후 1976년 말까지는 평형상태이었다. 그러나 1976년 이후에는 어획노력량의 증가로 인하여 이러한 위상을 가지는 경형은 명확하지 않았다. 또한, 수온이 평년 보다 낮았던 저수온 년인 1977년의 어장분포는 수온이 높았던 고수온 년인 1972년보다 남쪽으로 치우쳐 있는 경향을 보였다.

• 한국수산과학회지
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• 제41권5호
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• pp.389-398
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• 2008

The regional characteristics of crackdown on illegal fisheries in Korea Waters are investigated using data from the Ministry of Maritime Affairs and Fisheries, local cities and Provincial governments, and the Korea Coast Guard from 1996 to 2006, focusing on the relationship between the crackdown on illegal fisheries, catches within the affected regions, and characteristics of similar crackdown in Chinese fishing vessels. Illegal fisheries in the South Sea were all strongly affected within each region, and a relationship between the crackdown and subsequent catches showed a relatively good correlation in the South Sea. As a monthly variation, a strong correlation appeared during the autumn season, but this strong correlation was not evident during the spring. This paper suggests that a relationship exists between the crackdown on illegal fisheries and subsequent catch rates, suggesting that an intensification of these efforts in the South Sea and the Yellow Sea, and attendant increases in manpower and equipment would result in a significant decrease in illegal fishing by Chinese fishing vessels from year to year.

• Journal of the korean society of oceanography
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• 제39권4호
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• pp.207-211
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• 2004

We used long time series of hydrographic and biological variables to examine the ecosystem consequences of a rare, anomalous event in the south sea of Korea. The highest zooplankton biomass in 36 years of sampling occurred in April 1997. Zooplankton biomass exceeded 2 times than the long-term mean at 35% of the stations. Copepod abundance was low in April and June and also failed to show a seasonal peak in 1997. Mackerel (Scomber japonicus) catches were very low in spring 1997 and 1999, in spite of a positive correlation between zooplankton biomass and mackerel catches at lags of 0, 12 and 24 months. It was discussed that a high zooplankton biomass with low copepod abundance in April 1997 resulted from unusual high temperature and salps abundance. Water temperatures were ca. $2^{\circ}C$ higher than the long-term mean at the surface. Salps and doliolids (thaliaceans), especially the warm-water species Doliolum nationalis, dominated the zooplankton. An unusual incursion of the Tsushima Warm Current may have transported the thaliaceans into the area and/or produced favorable conditions for a bloom. This study suggested that taxonomic composition of zooplankton was important to decide mackerel catches.

• Fisheries and Aquatic Sciences
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• 제26권5호
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• pp.336-343
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• 2023

This study aimed to know the response of deep-sea squid Sthenoteuthis oualaniensis to the light colors of the artificial bait. This experiment used the commercial artificial flashlight baits commonly sold in the fishing shop. The bait has several different light color combinations. The light colors were modified into several light colors by inactivating certain colors and used as treatments. The study is expected to be able to find flashlight bait's most effective color for squid fishing. We applied red-green, green, blue, and commercial bait lights in this study. Each treatment has 3 replications. The effect was expressed as the amount of squid caught. Data were analyzed by one-way analysis of variance. Results showed a significant effect on the number of squid catches. There was significantly different squid catches among the treatments. It indicates that this artificial flashlight bait could be developed to maximize squid catches. This finding can be used for the local fishermen's income and the squid fisheries development.

• 수산해양기술연구
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• 제31권1호
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• pp.15-23
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• 1995

여수 연안 정치망 어장의 주변 해역을 중심으로 1990년 4월부터 11월까지 매월 채집해서 분석한 식물플랑크톤의 분포량과 여수수협 위판장으로부터 구한 어획량 자료등을 이용하여 여수 연안 정치망 어장의 환경요인인 식물플랑크톤의 분포량과 어획량 변동과의 관계를 분석 정리한 결과를 요약하면 다음과 같다. 1) 식물성 플랑크톤의 출현량은 춘계와 추계보다 하계에 최대가 되고, 특히 육수의 유입이 많은 여수만 중 돌산연안 수역 분포량이 많고, 소리도와 세존도부근의 식물성 플랑크톤 분포량은 내만수의 확장 경향을 추정하는데 유익하게 이용될 수 있다. 2) 여수 연안 정치망에 어획되는 주요 어종의 어획량은 삼치, 갈치, 고등어, 정어리, 멸치, 전갱이 및 방어의 순이고, 어획되는 시기는 정어리와 멸치가 4~6월, 전갱이, 갈치 및 고등어는 6~10월이 였으며, 삼치는 전 어기에 걸쳐 어획되었다. 3) 여수 연안 정치망 어장의 어획량은 식물성 플랑크톤 출현량과 상관 관계가 있고, 이들 식물성 플랑크톤량은 하계 육수의 영향을 많이 받는 내만수에 최대의 출현량을 보인다. 또, 이 어장의 어획량은 하계에 많으므로 여수 연안 정치망 어장은 육수의 유입에 의해 풍부한 영양염류를 공급받는 내만수내의 이료생물의 생산력이 어획량을 좌우하는 어장의 중요한 환경요인이 될 수 있다

• 한국해양학회지
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• 제25권3호
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• pp.151-159
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• 1990

조류에 의한 해수의 혼합이 활발한 연안역에서 동물 플랑크톤이 주야 수직 이동의 능력이 있는지를 파악하기 위하여 채집량의 주야 차이를 살펴 보았다. 상대적으로 크 기가 큰 요각류, Mysid, 모약류, 이매폐 유생 등은 야간에 표층에서 많이 채집되어 주 야 수직이동이 있을 가능성을 시사하고 있었다. 본 연구 결과와 과거의 방법 등을 통 하여 한국 서해 연안역에서 적절한 채집방법에 대하여 살펴 보았다.

• 수산경영론집
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• 제34권1호
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• pp.45-67
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• 2003

Main target of fishing policy was enlargement of fishing catches in Korea after 1960s. This has caused sustainable decrease of the amount on the fisheries resource. In the result, fishing managements in Korea have suffered from aggravation of management. In this research, it is estimated the technical efficiency on Korean Off-shore Stow Nets Fishery that was made publication by Farrel in 1957. According to the analysis, Its were excessive to the gap of technical efficiency among Korean Off-shore Stow Nets Fishing boats. The gaps were excessive not only among each fishing managements but also by tonnage class and by region. Then we can recognize we need the change of Fishing Policy. That is, we should change for main target of fishing policy from enlargement of fishing catches to the policy of Price. And we should consider the supply of standard tonnage boats and specialization of fisheries by regions.

• 수산경영론집
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• 제46권2호
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• pp.93-110
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• 2015

This research examined the transformations of the fisheries relations between Japan and Russia since the establishment of the Exclusive Economic Zone (EEZ) system. The author reviewed the transformations with investigation on mutual fishing access to EEZ including salmon & trout catches. The Japan-Russia fisheries relations have evolved through multiple developmental stages, which include mutual fishing access to EEZ, the reductions of a fishing quota to balance catches of the nations, provision of financial and technical support, and a payment system of EEZ fishing access fee. The Japanese salmon industry also has done similar practices, continuing to catch salmon and trout in the Russian EEZ. Additionally, Japan and Russia have attempted to develop joint fisheries projects and to assure fishing operation safety around Kuril Islands. The case of Japan-Russia mutual fishing access shows that a country that has authority over crucial fisheries resources tends to establish specific conditions of mutual fishing access so that it maximizes its national interest. Thus, this case gives us implication what could be future directions of Korea-China-Japan multinational fishing access. The principle of same number of fishing vessels and quantities of catches has worked in existing mutual fishing access to EEZ among Korea, China, and Japan. However, it is expected that a nation that is endowed with abundant fisheries resources would limit counterpart's fishing access to its EEZ. Therefore, Korean fisheries administration should prepare for all possible situations like a dramatic cut in fishing quota and the termination of fishing access. International fisheries cooperation and payment of fishing access could be viable options for such a situation.