• 수산해양기술연구
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• 제58권2호
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• pp.95-105
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• 2022

In this study, the fishery status of the octopus pot fishery in the east coastal sea were investigated, and the fishing performance of each pot shape was compared and analyzed. The fishery status survey was conducted through listening surveys at Jukbyeon Port, Uljin Port and Pohang Daebo Port in Gyeongbuk Province, and the amount of fishing gear used, fishing method, size and loss of octopus pot fishery was investigated. On the east coastal sea, octopus is one of the commercially important fish stocks and is caught in inshore pots, inshore combos, inshore gillnets and offshore pots. Among these fishing methods, pot fishing yields the highest catch. The shape of the pot differs depending on the region. In Uljin (Jukbyeon Port and Hupo Port), Gyeongbuk, rectangular type net pots are mainly used, and in Pohang (Daebo Port) in Gyeongbuk, drum-type pots are mostly used. Enteroctopus dofleini accounts for more than 90% of the catch of octopus. For the octopus fishing performance test by trap type, three types of traps (rectangular pot, drum pot and cylinder pot) were used on the coastal sea of Pohang Daebo. As a result, the total catch by pot shape was shown in the order of rectangular-type pot > drum-type pot > cylinder-type pot. The catch of octopus, the target species, was in the following order: rectangular-type pot > drum-type pot > cylinder-type pot. Such result shows a significant difference (Mann-Whitney test, p<0.05).

• 수산해양기술연구
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• 제47권2호
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• pp.146-152
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• 2011

Underwater CCTV camera systems are increasingly replaced the traditional net approach of assessing the species, numbers and aggregation patterns of marine animals distributing around the artificial reefs installed in the inshore fishing grounds, in particular, in relation to the biological investigation of behavior and distribution patterns of target fishes. In relation to these needs, we developed a multi-directional underwater CCTV camera system to use in detecting and tracking marine animals in the artificial reef ground. The marine targets to be investigated were independently tracked by using a camera module toward the bottom and four camera modules installed in the interval of $90^{\circ}$ in horizontal plane and inclination of $45^{\circ}$ in vertical plane of the CCTV system without the overlap of video frames by each camera module. From the results of several field tests at sea, we believe that the developed multi-directional underwater CCTV camera system will contribute to a better understanding in evaluating the effect of artificial reefs installed in the inshore fishing grounds.

• 수산해양교육연구
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• 제28권4호
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• pp.903-912
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• 2016

Hagfish which belongs to the chordate contact cyclostomata, is important phylogenetic relationship between vertebrate and invertebrate. Cathepsins of the cysteine protease family have traditionally been thought to play a major role in intracellular protein degradation and turnover in lysosomes. In this study, Catepsin L was cloned from Inshore hagfish (Eptatretus burgeri), the cDNA encoding ORF of the Eptatretus burgeri Cathepsin L (EbCtL) is 978 bp. The cDNA encoding proEbCtL was expressed in Escherichia coli strain BL21(DE3) using the pGEX-4T-1 expression vector system. The recombinant proEbCtL protein was overexpressed as a approximately 55 kDa fusion protein. The overproduced soluble GST-fusion protein was then applied to glutathione-Sepharose 4B column chromatography; the sample harboring the fusion protein evidenced a high degree of purity when analyzed via SDS-PAGE and Western blot analysis. Its activity was quantied by cleaving the synthetic peptide Z-FR-AMC, Z-LLE-AMC, and Suc-AAF-AMC, and the optimal pH for the protease activity was 8, 9.5, and 9, respectively.

• 한국어류학회지
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• 제18권3호
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• pp.223-233
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• 2006

2001년 4월부터 10월 사이에 돌산도 율림 앞바다, 2002년 4월부터 10월 사이에 연도 앞바다, 그리고 2003년 4월부터 12월 사이에 돌산도 임포 먼바다에서 정치망에 어획된 수산생물의 일일 어획자료를 이용하여 종조성과 양적 변동을 파악하고, 연도별, 장소간 종조성을 분석하였다. 2001~2003년에 여수 해역에서 정치망에 의해 삼치(Scomberomorus niphonius), 방어류 (Seriola spp.), 갈치(Trichiurus lepturus), 멸치 (Engraulis japonicus), 줄삼치(Sarda orientalis), 살오징어(Todarodes pacificus), 덕대(Pampus echinogaster), 밴댕이(Sardinella zunasi), 고등어(Scomber japonicus), 황아귀(Lophius litulon), 꼴뚜기(Loligo beka) 등이 양적으로 우세하게 어획되어 여수해역에서 정치망으로 어획된 어류의 종조성은 주로 표영성 어류가 대부분을 차지하였다. 연안역에서는 밴댕이, 덕대, 양태 (Platycephalus indicus), 꼴뚜기, 외해역에서는 삼치, 방어류, 갈치, 덕대, 살오징어, 검복(Takifugu porphyreus), 참돔(Pagrus major)의 표영성 주거종 (pelagic resident species)이 우세하였으며, 멸치는 남해 전체에서 계절적으로 연안과 외해를 이동하는 대표적인 우점종이었다. 봄에 연안에 밴댕이와 멸치가, 수심이 보다 깊은 외해에는 내유하는 멸치와 황아귀, 방어류 등 대상으로 어기가 시작되어 여름에 갈치, 삼치, 고등어, 방어류, 줄삼치, 덕대, 살오징어 등의 외양종이 연안과 외해에 회유하여 어획량이 높았다. 가을에는 연안에서 삼치, 멸치, 꼬치고기 (Sphyraena pinguis), 독가시치 (Siganus fuscescens), 주둥치 (Leiognathus nuchalis) 등이 우점하였고, 외해에서는 삼치, 덕대, 학공치(Hyporhamphus sajori), 고등어, 갈치 등이 여름에 이어 계속 출현하였으나 어획량은 감소하는 온대 해역의 전형적인 계절성을 보였다. 남해안에서 정치망에 어획된 출현종은 대부분 부어류이었으며 그 변화 정도가 심하였으나, 대형정치망 일일 어획자료은 부어류 종조성의 계절변동을 분석하는데 유의한 의미를 가질 것으로 판단된다.

• 해양환경안전학회지
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• 제23권5호
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• pp.439-446
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• 2017

해사안전법에서는 기름 1,500킬로리터 이상 또는 유해액체물질 1,500톤 이상을 싣고 운반하는 유조선에 대하여 통항을 금지하는 유조선통항금지해역을 설정하고 있다. 이러한 선박이 유조선통항금지해역 내에 위치한 항만에 입출항하는 경우 유조선통항금지해역 바깥쪽 해역에서부터 항구까지의 거리가 가장 가까운 항로를 이용하여 입출항하도록 허용된다. 이는 유조선이 유조선통항금지해역에서 항행하는 시간이나 거리를 최소화하기 위한 것으로, 연안통항대를 이용한다는 의미로 해석되어서는 아니된다. 본 연구에서는 여수 광양항 특정해역 진입수로를 이용하지 않는 연안유조선의 교통량을 분석하고, 선박의 선적화물량을 조사하였다. 조사기간 중 연안통항대를 이용하는 총 31척의 연안유조선 중 51.6 %에 해당하는 16척의 선박은 1,500톤 이상의 화물을 적재한 것으로 나타났다. 이는 유조선통항금지해역의 입법취지에 타당하지 않는 것으로, 본 연구에서는 유조선통항금지해역의 바깥쪽 해역으로부터 특정해역 진입수로까지를 연결하는 해역을 설정하여 여수 광양항 유조선 입출항 항법 규정(안)을 제시하였다.

• 수산경영론집
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• 제25권1호
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• pp.37-59
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• 1994

Many studies to cope with the present problems of Korean coastal and offshore fisheries has been performed, but these were done partly in necessities and general studies for Korean inshore and offshore fisheries are in early stage. Most of these studies adopted analytical way of approach for each fishery individually and they could not reflect the effect of correlated interaction among fisheries on the several common species/stocks, and thus optimal effort allocation was impossible. To consider general fisheries and optimal effort allocation among competing mixed species, a linear programming (LP) approach is applied in this study and introduced into 16 important inshore and offshore fisheries with 13 constraining species which were chosen by annual yield order. This study is not based on the biological interaction among species (i.e., prey - predator system) but the technological interaction between species and fishing efforts. For the application of LP model in these fisheries, the standardization of fishing efforts through different fishing gears could not be successful and a new way of effort standardization through CPUE for vessel tonnage was originated. Total standardized fishing effort on a particular species i, Ei, is computed as the linear summation of standardized fishing effort generated by each fishery j. That is, (equation omitted) where $f_{j}$ is the total vessel tonnage of fishery j and aij is the coefficients contributing to the standardized fishing effort per ton for species i taken in fishery j. The total fishing effort level on species i due to both directed fishing and by - catch can thus be accounted in the aij's. Optimal effort allocation among the j fisheries may be considered a minimizing problem (minimize $\Sigma$ $f_{j}$), subject to the constraints that standardized fishing effort levels on particular species are maintained at, above, and below certain predefined levels. Fishing effort goals for individual species can be based on various biological and/or economic criteria, i.e., fishing effort level generating maximum sustainable yield and/or maximum economic yield. But in this study the $F_{0.1}$ criteria which was accepted as an approximate level for $F_{mey}$ by Outland and Boerema's (1973) study. The findings of this study are, (1) LP model can be applied to the Korean inshore and offshore fisheries giobally. (2) Through a new way of combining multiple different fisheries' efforts for a particular species together generating standardized fishing effort, Schaefer curve could be applied to the complex system successfully. (3) The results of this study for total reduction scale were mostly the same as those of prior studies, but different much from the individual scales of reduction. This study showed the necessities for exploitation of more concrete parameters to put into consideration of profitability of fisheries and social factors, and this model can be modified according to the actual constraints. Also, considering the age structure of stocks, this model can be developed into better one for better fisheries management.ent.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.1334-1335
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• 2011

본 논문에서는 국내 연안의 파도특성을 고려한 AWS (Archimedes Wave Swing)형 파력발전 장치의 움직임을 분석한다. 파력발전 장치의 크기 및 설치깊이, 파도 주기에 따른 발전장치의 진폭 변화를 알아보며 최대 진폭을 얻을 수 있도록 발전장치를 모델링한다.

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 2000년도 한국해안해양공학발표논문집 Proceedings of Coastal and Ocean Engineering in Korea
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• pp.103-112
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• 2000

Early efforts to model wave transformation from offshore to inshore were based on the ray theory which accounts for wave refraction due to changes in bathymetry and the diffraction effects were ignored. Prediction of nearshore waves with the combined effects of refraction and diffraction as well as reflection has taken a new dimension with the use of the mild-slope equation and the Boussinesq equation. (omitted)

• 전력전자학회:학술대회논문집
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• 전력전자학회 2015년도 전력전자학술대회 논문집
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• pp.279-280
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• 2015

본 논문에서는 연근해 파력발전 시스템을 제안한다. 바다에는 부력체와 동력전달부만을 설치하고, 나머지 시스템은 육상에 설치하여, 기존의 원해 파력발전 시스템에 비해 초비 투자 비용이 저감된다. 연근해 파력발전 시스템의 축소 모형을 제작하였으며, 이를 통해, 연근해 파력발전 시스템의 출력 특성을 분석하였다. 제안된 시스템의 출력 특성이 풍력발전 시스템의 특성과 비슷하게 나타남을 확인할 수 있으며, 실현 가능성이 충분하다고 판단할 수 있다.

• 한국어류학회지
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• 제21권4호
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• pp.311-321
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• 2009

Three categories (freshwater, amphidromous, and marine fishes) of Taiwanese fishes are analyzed on the basis of zoogeographic elements, viz. China element, Indo-China element, Indo-West Pacific element, Indo-Pacific element, North-Pacific element, Japan-Oregon element, and circumtropical element. Freshwater fishes, which include the China and Indo-China elements, are distributed on part of the boundary area between the Palaearctic and Oriental regions of Wallace (1876). Diadromous fishes include the North-Pacific, Indo-China and Indo-West Pacific elements. Taiwanese salmon, a landlocked (initially diadromous) species that became established in Taiwan between 0.5 my B.P. and the early Pleistocene, is recognized as a distinct taxon included within the Oncorhynchus masou complex, which comprises here three species and two subspecies, viz. Oncorhynchus masou masou (Sancheoneo, Songeo, Sakura-masu or Yamame), O. masou ishikawae (Satsuki-masu or Amago), O. sp. (Biwa-masu), and O. formosanus (Taiwanese salmon), based on molecular, morphological and biological studies. Marine fishes are discussed under the following headings, brackish-water fishes (fishes of brackish waters and seas adjacent to continental coastlines, North Pacific and Indo-West Pacific elements; fishes of brackish waters and seas primarily around islands, Indo-West Pacific element), reef fishes (fishes of inshore reefs along continental coastlines from 0 to ca.100 m depth, Indo-West Pacific element; fishes of inshore reefs primarily around islands from 0 to ca.100 m depth, Indo-West Pacific element; fishes of offshore reefs along continental shelf edges from ca.150 to 300 m depth, circumtropical and Indo-Pacific elements; fishes of offshore reefs primarily around islands from ca.150 to 300 m depth, Indo-Pacific element), demersal fishes (fishes on continental shelves shallower than ca.150 m depth, Indo-West Pacific and Japan-Oregon elements; fishes on edges and upper continental slopes from ca.150 m to 500 m depth, Indo-West Pacific, Indo-Pacific, and circumtropical elements; fishes on lower continental slopes to abyssal plains from ca.500 m to 6,000 m depth, circumtropical element and rarely Indo-Pacific element), pelagic fishes (epipelagic fishes from 0 to ca.150 m depth, Indo-West Pacific, Indo-Pacific or circumtropical elements; meso- and bathypelagic fishes from ca.150 to 3,000 m depth, circumtropical element). The distribution of Taiwanese marine fishes are influenced by the Kuroshio Current, low-salinity and low-temperature waters from mainland China, and sea-bottom topography.