• 수산해양기술연구
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• 제51권3호
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• pp.312-320
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• 2015

The 1/5 scale-down model of the Bycatch Reduction Device (BRD) from an Argentinean demersal trawl was tested in a circulating water channel. The BRD is designed to help small Hake (merluza, merluccius hubbsi) to escape from a trawl. It is settled in front of a trawl codend, and is equipped with selection grids that help small fish to escape from the gear and guiding panels that help fish to meet with the grids. Bars of the grids are wires covered by the PVC and other parts of the BRD are made of net. When the velocity was less than 0.65 m/sec (2.81 Kont when translated to real towing speed) which is slow speed compared with real towing speed, position between an upper guiding panel and an upper selection grid were good to help small fish to escape. When the velocity was more than 0.8 m/sec (3.41 Knot when translated to real towing speed) which is similar to and faster than real towing speed, it was considered that small fish may have difficulties in escaping because the gap was not enough between an upper guiding panel and an upper selection grid. The lower selection grid was sat on the bottom of the tank without an angle due to the weight that it carries. Improvements were proposed to position the panels and the grids better.

• 수산해양기술연구
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• 제32권3호
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• pp.223-234
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• 1996

Distribution of Anchovy was analyzed from the experimental operations by the small anchovy drag net fishery in the coastal area of Yang yang - gun and Myongju - gun of Kangwon Province from October to December, 1994. Temperature ranged from $11.4^{\circ}C.$to $17.4^{\circ}C.$throughout the experimental period. Fishes caught by experimental operation vessels were composed of anchovy, Clupanodon Punctatus, Pleuronectidae, Tetraodantidae, Acanthopagrus Schlegeli etc., and the anchovy occupied more than 99.6% of the total catch. Anchovy was characterized by the most abundance of the catch for the individual less than 6cm and the gradual increase after October for those larger than 6cm. CPUE(catch per tow) of anchovy was 684kg in October, 784kg in November, 1,590kg in December and mean CPUE of 3 months from October to December was 1,066kg. Fishing grounds of anchovy were formed in coastal area, from $37^{\circ}$45'N to $38^{\circ}$04'N, off Kangwon Province. Distribution density of anchovy in Chumunjin - up, Kyohang - ri Sachon - myon, and Sachonjin - ri coasts was higher than the other areas. Anchovy caught in this surveyed area was recruited from July to September at the length class between 2cm and 3cm, and grew to the sizes between 4cm and Bem in October, between 5cm and tcm in November, between tcm and Bem in December. Recruitment of anchovy increased from July to September and suddenly decreased after September. Individual number of the population was the largest during the period from August to October and gradually decreased after October. Biomass continuously increased after August, and was the largest in December.

• Clinics in Shoulder and Elbow
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• 제21권1호
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• pp.42-47
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• 2018

A 25-year-old woman presented to the emergency room with a painful and swollen right forearm. She had just sustained an injury from an accident during which her arm was tightly wound by a rope as she was lowering a net from a fishing boat. Before being released, her arm was rigidly trapped in the rope for approximately ten minutes. Radiographs revealed anterior dislocation of the radial head that was accompanied by plastic deformation of the proximal ulna, manifested as a reversal of the proximal dorsal angulation of the ulna (PUDA); suggested a Monteggia equivalent fracture. With the patient under general anesthesia, we reduced the radial head by posterior compression at $90^{\circ}$ of elbow flexion and at neutral rotation of the forearm. However, the reduction was easily lost and the elbow re-dislocated with even slight supination or extension of the arm. After the osteotomy of the ulnar deformity to restore the PUDA to normal, the reduction remained stable even with manipulation of the arm. We found that the patient could exercise a full range of motion without pain at the 3-month follow-up, and neither residual instability nor degenerative changes were observed at the final 3-year follow-up.

• 한국어류학회지
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• 제31권3호
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• pp.178-182
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• 2019

납서대과에 속하는 Brachirus annularis 1개체 (표준 체장 161.0 mm)가 제주도와 거문도 사이의 해역에서 2019년 3월에 처음으로 채집되었다. 이 종은 유안측에 불규칙한 형태의 반점과 얼룩무늬를 가지고 있으며, 꼬리지느러미는 등지느러미와 뒷지느러미와 연결되었고, 머리와 눈 그리고 가슴지느러미가 작은 형태를 띠는 특징을 갖는다. 따라서 유안측에 불규칙한 형태의 반점과 얼룩무늬를 가지는 특징에 기초하여 이 종의 속명과 국명은 각각 "얼룩서대속"과 "얼룩서대"라고 명명하였다.

• ALGAE
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• 제34권2호
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• pp.71-90
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• 2019

A new encrusting red alga was found growing abundantly on glass debris items that drifted ashore along the coasts of Oregon and Washington. These included discarded fluorescent tubes, incandescent light bulbs, capped liquor bottles, and ball-shaped fishing-net floats. Field collections and unialgal cultures of the alga revealed that it consisted of two morphological phases: a young loosely aggregated turf and a mature consolidated mucilaginous crust. The turf phase consisted of a basal layer of globose cells that produced erect, rarely branched, uniseriate to multiseriate filaments up to $500{\mu}m$ long with closely spaced cells lacking pit-plugs. These filaments expanded in size from their bases to their tips and released single cells as spores. At maturity, a second phase of growth occurred that produced a consolidated crust, up to $370{\mu}m$ thick. It consisted of a basal layer of small, tightly appressed ellipsoidal-to-elongate cells that generated a mucilaginous perithallial matrix containing a second type of filament with irregularly spaced cells often undergoing binary division. At the matrix surface, the original filaments continued to grow and release spores but often also eroded. Individual cells, examined using confocal microscopy and SYBR Green staining, were found to contain a central nucleus, a single highly lobed peripheral chloroplast without a pyrenoid, and numerous chloroplast nucleoids. Morphological data from field and culture isolates and molecular data (rbcL, psbA, and SSU) show that this alga is a new genus and species which we name Viator vitreocola, "a traveller on glass."

• 수산해양기술연구
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• 제58권3호
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• pp.251-261
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• 2022

Tuna purse seine fishery (TPF) constitute more than 60% of distant water fishery production in Korea based on a statistic of 2018, and 28 ships from four different companies were under operation at the western and central Pacific Ocean. On this research, common risk factors during TPF were investigated via enumeration of five years Korean fisherman's insurance payment statement, followed by some counterplans to diminish the accident rate. The accident rate of TPF on the Pacific Ocean peaked by 43.0% in 2014 and constantly decreased to 23.0% until 2018, presenting an average of 33.6%. Meanwhile, the accident rate on the Indian Ocean reached the highest point 55.1% in 2014 and declined to 11.6% in 2016, having an average of 24.7%. The average accident rate of the Indian Ocean scored 8.9% lower than the rate of the Pacific Ocean, but no statistic significance was observed. Depending on the process of operation, 'casting or hauling of net' was the most frequent part that people received an injury (40.4%). When the accidents were classified by their types, 'falling down' was the most recurrent cause of the injuries (28.5%). At the point of severity, the worst injuries were induced by crush hazard. Considering aforementioned accident frequency and severity, all the factors on the accident type list were divided into three different groups including high risk, moderate risk, and common risk. This study is expected to contribute to the reduction of occupational accidents during the work of fishermen and establishment of a safety management system for distance water fishing vessels.

• 수산해양기술연구
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• 제59권4호
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• pp.399-406
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• 2023

This study presents an analysis of bycatch data concerning Pacific white-sided dolphins (Lagenorhynchus obliquidens) along the Korean coast from 2016 to 2021. A total of 503 bycatches were examined, encompassing data on year, month, body length, sex, latitude (N), longitude (E), and fishing gear. Bycatch was the most frequent in waters with a longitude of less than 130°E, particularly in the southern coastal region at a latitude of 35.5°N, with a higher likelihood of bycatch in lower latitudes. Since 2017, a decreasing trend in bycatches has been observed. The sex distribution of bycaught dolphins showed a predominance of males (40%), followed by females (31%), with an unclassified category at 29%, though no statistically significant differences were found (p > 0.05). Seasonal analysis indicated that bycatch predominantly occurred during the winter months, with significant monthly variations (p < 0.01). Pacific white-sided dolphins were primarily ensnared in gill nets and, to a lesser extent, in stationary nets. Statistical analysis by gear type revealed a significant preference for gill nets (p < 0.001). Considering body length composition in relation to latitude, it is suggested that Pacific white-sided dolphins may utilize the southern waters of the East Sea as a potential nursery ground, though this was not confirmed at a significant level, emphasizing the need for further in-depth monitoring and ecological investigations. Given that there are approximately 27 different types of gill nets associated with the majority of bycatches, more detailed research is warranted to divide these gear types into finer subcategories for estimating bycatch relationships, ultimately leading to the development of effective conservation and management strategies.

• 한국어류학회지
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• 제35권4호
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• pp.372-377
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• 2023

농어목 전갱이과에 속하는 Trachinotus blochii 3개체가 부산과 제주도에서 처음으로 채집되어 국내 첫기록종으로 보고한다. 본 종은 형태적으로 우리나라에 서식하고 있는 빨판매가리(T. baillonii)와 유사하지만 체측에 점이 없으며(vs. 빨판매가리는 점들이 있음), 25~25개의 등지느러미 연조수(vs. 18~20개), 뒷지느러미 20~24개(vs. 16~18개)의 특징을 갖는다. 보다 종 동정을 정확히 하기 위해서 채집된 개체들의 미토콘드리아 cytochrome c oxidase subunit I (COI) 염기서열을 분석한 결과, 본 연구에 이용된 개체들은 NCBI database에 등록된 Trachinotus blochii의 염기서열과 완벽하게 일치하였다. 국내에 처음 채집된 본 종의 국명은 NIFDI (2010)에 의거 "무점매가리"로 제안한다.

• 수산해양기술연구
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• 제24권2호
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• pp.78-82
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• 1988

한국근해의 중층 트로올선에서 전개판의 수중중량을 경감시켜서 끌줄을 길게 주므로서 전개력을 향상시키기 위하여 스티로폴뜸을 전개판의 천정판에 고정시키고 끌줄 길이와 예망속력을 변화시켰을 때의 전개판의 깊이와 전개간격을 실측한 것을 분석.검토한 결과는 다음과 같다. 1. 전개판 깊이는 끌줄 길이가 100m이고 예망속력이 101~108m/sec인 범위에서 뜸이 있을 경우 41~25m, 뜸이 없을 경우 45~26m이고, 뜸줄 길이가 150m일 경우는 뜸이 있을 경우 68~44m, 뜸이 없을 경우 74~46m로서 뜸이 있을 경우가 없을 경우보다도 9~4% 정도 얕았다. 또 실측치는 어느 경우나 계산치보다도 15% 작았다. 2. 전개판의 전개간격은 끌줄 길이가 100m이고, 예망속력이 1.1~1.8m/sec인 범위에서는 뜸이 있을 경우 34~41m, 뜸이 없을 경우 30~38m이고, 끌줄 길이가 150m일 때는 뜸이 있을 경우 44~50m, 뜸이 없을 경우 37~46로서 있을 경우가 없을 경우보다도 끌줄 길이 100m에서 10%, 150m에서 15%정도 더 컸다. 또, 실측치는 계산치보다 항상 컸으며 계산치에 대한 실측치의 비는 끌줄 길이가 100m일 때 1.17~1.14, 150m일 때 1.17~1.09이었다. 3. 날개 끝 간격은 끌줄 길이 100m인 때 뜸이 있을 경우가 없을 경우보다 1m 정도 크고 유효망구면적으로는 10% 정도 크며, 끌줄 길이가 150m인 때는 그 차이가 2m로서 유효망구면적으로는 20% 정도 크다고 추정된다. 따라서 전개판에 뜸을 달아서 전개판의 수중중량을 일시적으로 가볍게 해 주는 것은 유효망구면적을 크게 하므로 어획성능향상에 상당히 도움이 될 것이 기대된다

• 한국조경학회지
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• 제43권5호
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• pp.121-131
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• 2015

과거 농외소득 향상을 목적으로 하던 마을중심의 농촌지역개발사업이 최근 농어촌중심지를 중심으로 진행되고 있다. 농어촌중심지 사업은 지역주민의 소득 이외에 지역주민의 생활여건 개선을 도모하는 것을 목표로 한다. 시대가 변하면서 농촌과 농촌 중심지의 모습도 다양하게 변화하였다. 농촌과 도시가 하나의 지역으로 융합되어 한 지역에서 농촌과 도시의 복합적 성격을 띠는 러번지역이 발생함에 따라, 현대사회에서 농촌의 중심지는 자연스럽게 도시적 인프라를 갖춘 러번지역으로 집중되게 되었다. 본 연구의 대상인 정읍시 내장상동 또한 농촌의 자연환경을 가지고 있지만, 동시에 도시지역의 구조 형태를 가지는 도농통합적 생활권 중심지이다. 기존 정부의 하향식 농촌개발사업으로 나타난 문제점을 해결하기 위해 러번지역에 조직되어 있는 공동체를 활용한 주민참여형 사업이 진행되어야 한다. 따라서 본 연구에서는 도시적 성격을 가진 러번지역의 특성과 주민들의 수요분석을 통해 생활서비스 증진을 위한 러번지역의 중심지 활성화 계획을 제시하고자 하였다. 이를 위해 주민 워크숍 및 시범활동과 같은 주민역량강화 단계를 기본계획수립 과정에 반영함으로써 주민들의 자생력을 강화시키고자 하였다. 연구는 대상지 현황 및 여건분석, 기본구상 및 발전방향설정, 세부사업계획, 사업추진계획의 과정으로 진행되었으며, 현장조사와 주민수요를 기반으로 도보환경 개선, 공동체 기반시설 조성, 살기 좋은 생활환경 조성의 세 가지 목표를 설정하였다. 또한 본 연구에서는 러번지역이라는 발전된 형태의 농촌지역에서 주민들이 실제로 필요로 하고, 이미 구성되어 있는 지역공동체 등의 활동 단체를 사업의 실행주체로 참여시킬 수 있는 주민참여형 농촌중심지 활성화 방안을 제시하였다. 늘어나는 러번형태의 지역 특성에 맞는 주민 자생적 농촌중심지 활성화 계획을 통해 지역의 능동적이고 성공적인 성장을 기대한다.