• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.40 no.3
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• pp.182-188
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• 2004

It has been, in general, known that the catching efficiency of a trammel net is better than that of a gill net because of the variability of catch species and size. In this stidy, A fishing gear test was carried out to analyze the catching efficiency of the gill net and the trammel net on the coast of Geomun-do of southern Korean waters and fish school aggregation was also investigated using a underwater video camera. CPUE of the gill net was 49.2% higher than the trammel net but fish species was 34.5% lower where there was no difference on the significance level of 5% by ANOVA test. Main catch species caught by the gill net were red seabream(Pagrus major) and triggerfish(Aluterus monoceros), skate ray(Raja Kenojei) and red seabream for the trammel net, and the average body length of red seabream was shorter than the trammel net. It was thought that the reason of higher catch in the gill net than the trammel net was a fish school which can be caught easily by gill net and the size of population was suitable for the gill net.

• Journal of the Korean Society of Marine Environment & Safety
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• v.18 no.1
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• pp.25-32
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• 2012

To arrange effectively artificial reefs for marine afforestation, tidal currents were analyzed by numerical experiments. The numerical experiments were carried out by EFDC(Environmental Fluid Dynamics Code), and water column was vertically divided 5 layers. Tidal current patterns showed to be affected by main current at outside of study area, and circle currents of two were observed from analysis of residual currents. The calculated harmonic constants of tide and tidal current agreed well with those of observations at two stations for tide and two stations for tidal current. The model successfully reproduced the tidal current around the Geomoondo marine afforestation. It suggest that artificial reefs for marine afforestation should be installed belt zone at study area.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.5
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• pp.700-711
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• 2022

In this study, deepwater design waves were estimated for 16 wave directions and various return periods based on statistical analysis of extreme waves observed for more than 20 years at three stations (Chilbal-do, Geomun-do, Donghae). These values were compared with design waves estimated based on the omni-directional wave data. The Weibull distribution was used as the probability distribution function whose parameters were determined by the least square method. The Kolmogorov-Smirnov test was applied for the goodness of fit test. Notably, the directional design waves were smaller than the omni-directional design wave for every wave direction. The maximum 50-year wave heights for directional sectors were 7.46 m (NNE), 12.05 m (S), and 9,59 m (SSW) at Chilbal-do, Geomun-do and Donghae whereas those for uni-directional wave data were 7.91 m, 13.82 m and 10.38 m, respectively. This implied possible under-estimation of the deepwater design waves for 16 wave directions being currently used in the design of offshore and coastal structures.

• Korean Journal of Ichthyology
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• v.22 no.3
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• pp.168-178
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• 2010

Fish assemblages associated with rock reef and non-rock reef were studied using specimens collected at three sites in Geomun Island waters of the Southern Sea, Korea, in February, May, August and October, 2006. Two survey methods for the study were followed: collection by a gill net, and video observation by scuba diving. The gill-net survey was conducted during the night, the scuba-diving observations were conducted during the day. From the gill-net survey, a total of 40 species, 380 inds. and 71,426.9 g was caught at the three sites. The dominant species was Trachurus japonicus; other species were Raja kenojei, Dasyatis akajei, Stephanolepis cirrhifer, Narke japonica, Pagrus major, Sebastes inermis, and Sphyraena pinguis. At the rock-reef site, a total of 26 species, 264 inds. and 46,776.7 g was caught by gill net, and the dominant species was T. japonicus. A total of 17 species, 45 inds., 10,535.1 g was caught at the flat-bottom 1 site, and 19 species, 71 inds. and 14,115.1 g were caught at the flat-bottom 2 site. The scuba-diving survey resulted in 13 species and 1,749 inds. observed at the three sites through the survey period. The main observed fishes were rock-dwelling species such as Chromis notatus, Microcanthus strigatus, S. cirrhifer, Ditrema temmincki, Evistias acutriostris, Girella punctata, Halichoeres poecilopterus, Hexagrammos agrammus, Prionurus scalprum, Sebastes inermis, and Semicossyphus reticulatus. Seven species and 1,739 inds. observed at the rock-reef site comprised 99.4% of the inds. of the three sites. Therefore, the fish community in Geomun Island waters included many rock-reef. species, but a few were migratory species like T. japonicus and Scomber japonicus. The abundance of fish at the rock-reef site was high in comparison with those at two non-rock reefs. The dominant species were very different between the day and the night, although rock-reef species comprised the main part of the fish community. We conclude that the high abundance of fish in Geomun Island waters is most closely related to physical structure, such as rock reefs, which is the main habitat of many fishes.

• Animal Systematics, Evolution and Diversity
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• v.18 no.2
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• pp.245-252
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• 2002

Some crinoids collected by scuba divers from Jeju Island, Geomundo Island and Yokjido Island were identified. Of which two species, Oligometra chinensis A. H. Clark, 1918 belonging to the family Colobometridae and Neometra multicolor (A. H. Clark, 1907) belonging to the family Calometridae, order Comantulida, turned out to be new to the Korean fauna. The Calometridae was reported in Korea for the first time.

• Animal Systematics, Evolution and Diversity
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• v.11 no.2
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• pp.147-158
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• 1995

The identified marine Tetractinomorpha consist of 6 species in 5 genera, 5 faimilesand 3 orders. Of those Two species, Poecillastra wondoensis and Jaspis wondoensis, are new to science and are described with detailed illustrations. Four species, Craniella ellipsoida. Discodermia tuberosa, Discodermia panoplia, and Stelletta validissima orthotriaena , are new to Korea and are remarked with illustrations.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.5
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• pp.945-953
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• 2012

Yeosu area from the old historical monuments and artifacts related communications signal station, directions display panels, lighthouse, Geomundo the first submarine cable installation, etc. That appears in old documents and communications of the area should check the history and development of communication in understanding the Yeosu area and communicate the need to identify resources historicity.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.22 no.4
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• pp.71-74
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• 1986

The author tried to clarify the distribution of the total length and body weight of the file h, Navodos modcstus, caught by trawl net during July, 1984 in the southern sea korea. Among the catches of five times fishing operation, 1540 individuals were randomly sampled for the measurement. The results are summarized as follows; " The distribution of total length showed bimodal type, wbich was able to analyzed into two normal distributions N(17.46, 1. 02^2) and N(22.09, 1. 77^2). And smaller group was much than older one. The age of the sample estimated from the total length distribution of. smaller group was 1. 5 to 2, and the larger group 2. 5 to 4. The relationship between the total length and the body weight can be presented as following equation: $$W=0.01726 L^{2.8507}$$ ' or $$W= 0.01109 L^{3.0}$$ or $$W= 0.01109 L^{3.0}$$.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.431-434
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• 2013

국민관광객과 방한 외래관광객의 증가(문체부, 2012)로 도서와 해안지역에 대한 관광수요가 확산됨에 따라 중앙정부와 지방정부는 등대(예 : 영도등대, 간절곶등대, 울기등대, 거문도등대)를 중심으로 국민생활속의 해양관광공간, 해양레저스포츠공간, 어촌체험공간, 유통관광중심의 어항개발 및 크루즈관광활성화를 위하여 노력하고 있다. 새로움을 추구하는 관광객의 욕구가 증가하면서 틈새관광(niche tourism)의한 형태로 도서 관광(small island tourism)이 주목되고 있다(김영준, 2011). 내륙 중심의 관광에서 해양 관광으로 관심이 변화 확산되면서 친수공간시설에 대한 관광수요의 증가가 예상된다(이한석, 심미숙, 2009). 이와 같은 현실에서 도서에 위치하고 있는 등대자원을 활용하여 관광객의 욕구를 충족시킬 수 있는 등대관광활성화가 기대된다. 등대가 전통적인 기능과 역할에 충실한 항로표지로서 뿐만 아니라 공공서비스장소로서 해양문화를 향유할 수 있는 체험의 장을 제공하고 건축문화유산으로서의 역사성과 등대 고유의 기능에 대한 관광객의 흥미와 욕구를 잘 접목시켜 해양관광자원으로서의 가치를 극대화할 수 있을 것이다.

• Journal of architectural history
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• v.27 no.1
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• pp.17-28
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• 2018

This study researches the relationship between the Folk houses in Heung Yang-islands and the Ulleung-island Folk Houses in Modern Age. Fork houses reflect cultural and geographical features synthetically and concretely. Fork houses contain the thoughts of residents and have been built rationally and economically, therefore studying fork houses is a very meaningful task. This study has a focus on the elements which influenced fork houses of Ulleungdo at the time when fork houses were constructed officially. There have been studies on fork houses of Ulleungdo limited in embrasive characteristics, space construction and arrangement. So, the purpose of this study is to investigate about the element and background of Ulleung-island Folk Houses in Modern Age.