• Animal Systematics, Evolution and Diversity
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• 제28권3호
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• pp.212-214
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• 2012

The Cymatium Roding, 1798 is a small- to large-sized marine gastropod genus. Three species has been reported thus far for Cymatium in the Korean waters. In general, Cymatium encausticum (Reeve, 1844) is known to occur in tropical seawaters including the Philippine Islands along with its congeners C. gutturnium, C. springsteeni, and C. exile. A single individual of the species was collected from Jejudo Island by SCUBA diving and morphological features were observed using a stereomicroscope. This is the first study to report the occurrence of Cymatium encausticum (Reeve, 1844) from the Korean waters, providing a detailed description of the species with the illustration for the shell morphology.

• Animal Systematics, Evolution and Diversity
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• 제28권3호
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• pp.208-211
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• 2012

Caminus jejuensis n. sp was collected from depth of 20 m at Geomeunyeo, Seogwipo, Jejudo Island by a SCUBA diving from April 2004 to December 2008. This new species is similar to C. chinensis from China in the composition of spicules except for the spherasters and they differ in spicule size and growth form. This species has longer orthotriaenes and spherules, smaller sterrasters and oxyasters than those of C. chinensis. This species also has many spherasters in choanosome, but C. chinensis lacks. Morever, the new species is a massive shape with wrinkles, whereas C. chinensis is a club shape with smooth surface. Description and figures of the new species are provided.

• Fisheries and Aquatic Sciences
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• 제20권2호
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• pp.2.1-2.5
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• 2017

This is the first report of Fowlerichthys scriptissimus (Lophiiformes, Antennariidae) from Korea. A single specimen (291.0 mm SL) was collected off the coast of Jejudo Island by gill net on 28 March 2012 and identified with morphological and molecular approaches. The specimen is characterized by having all five pelvic fin rays bifurcate and possessing 20 vertebrae, 13 pectoral-fin rays, and a basidorsal ocellus on the side of the body. This species is distinguishable from other Korean taxa by the number of pectoral fin rays, the bifurcate form of the pelvic rays, and the vertebral count. We add this species to the Korean fish fauna and suggest new Korean names, "Byeol-ssin-beng-i-sok" and "Byeol-ssin-beng-i" for the genus and species, respectively.

• Animal Systematics, Evolution and Diversity
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• 제25권1호
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• pp.15-18
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• 2009

A new species of genus Clathria (Microciona) (Demospongiae: Poecilosclerida: Microcionidae), Clathria (Microciona) sinyangensis n. sp. was collected from Intertidal zone by hand at Seopjikoji, Sinyang, Jejudo Island, Korea on 15 Oct. 2008. C. (M.) sinyangensis n. sp. is closely related to C. (M.) pennata Lambe, 1895 in their spicules, but thick subtylostyle of new species is smaller than that of C. (M.) pennata's and has three sizes of toxa. Also, the new species has no dermal membrane.

• Animal Systematics, Evolution and Diversity
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• 제36권4호
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• pp.319-329
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• 2020

The sponge-dwelling shrimp, Anchistioides compressus Paulson, 1875, is recorded from Munseom Islet, Jejudo Island, Korea for the first time. All specimens were collected inside the orange coloured sponges by trimix diving at depth from 36-45 m on the rocky reef slope. Anchistioides compressus is characterized by the shape of the rostrum, the posterolateral teeth of the sixth somite, stylocerite being well developed, the anterior margin of the scaphocerite sharply produced, and the biunguiculate dactyli of the ambulatory pereiopods, as well as the proportions of the fingers of the second pereiopods. An illustrated description of the specimens and colour photo are provided to aid future recognition.

• Animal Systematics, Evolution and Diversity
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• 제40권1호
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• pp.102-107
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• 2024

Two colonial ascidians, Eudistoma glaucum and Eudistoma purpureum, are reported for the first time in Korean waters through taxonomic study on ascidians collected from a subtidal zone of Jejudo Island. Eudistoma glaucum is distinguished by opaque green color of colony in living, massive colony with large corona, smooth surface of corona, sparse sand only at the peduncle, zooids in circle, about 8-10 stigmata of 3 stigmata rows and test process. Eudistoma purpureum is distinguished by brilliant, opaque, purple color of colony in living, less lobed colony form, smooth shiny surface, sparse sand only at the basal test, absence of symbionts, zooids in circle, no distinct bulging sphincter in siphon, long atrial siphon and about 20 stigmata of 3 stigmata rows. As a result of this study, four species of the genus Eudistoma are now recorded in Korean fauna.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.21-29
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• 2005

한국의 등대는 지난 2003년에 건립 100주년을 맞이하였다. 등대는 본래 천혜의 자연조건 속에 입지해 있고, 바다와 관련된 시적 감흥을 간직하고 있으며, 태양에너지 등을 동력원으로 하는 친환경적인 건축시설이다. 이처럼 등대는 그 잠재적 가치와 개발 가능성이 높은 시설이다. 그 가운데 적절하게 개발된 유인등대는 이제 전통적인 기능과 역할에 충실한 항로표지일 뿐만 아니라 온 국민이 향유하고 체험하는 새로운 시설이자 공간이 되었다. 제주지방해양수산청은 지난 몇 년간의 노력을 통하여 제주도의 유인등대를 적절하게 해양문화공간으로 개발함으로써 해양문화에 대한 인식을 높이고, 지역관광에 공헌을 하여왔다. 본 연구는 해양수산부의 친수공간개발산업이 실시된 이래 제주도의 유인등대가 보다 더 적절하게 활용되기 위해 다각도로 검토되어야 할 논제들을 밝히고자 의도하였다.

• 식물분류학회지
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• 제51권4호
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• pp.378-385
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• 2021

제주도에서 보고된 해변취는 일반적으로 큰각시취의 이명으로 인식되고 있으나, 한반도의 큰각시취와는 다른 식물이라는 견해가 상존한다. 큰각시취는 총포편의 선단에 옅은 보라색의 건막질 부속체가 있는 이년생 초본으로 취나물속의 깃분취아절(sect. Theodorea)에 속하며, 형태적으로 유사한 분류군인 각시취와 함께 우리나라 전역에 분포하는 것으로 알려져 있다. 해변취의 실체를 확인하기 위해 제주도의 해변취 자생지와 일본 규슈의 큰각시취 자생지에서 채집 및 조사를 하였다. 형태적 유연관계를 확인하기 위해 본 연구에서 채집된 표본과 국립수목원(KH), 전남대학교 표본실(CNU), 토쿄대학 표본실(TI) 소장 큰각시취 및 각시취 표본을 비교 분석하였다. 해변취는 일본 규슈의 큰각시취와 형태적 및 생태적으로 구별되지 않아서 큰각시취의 이명으로 처리하였다. 식물종의 분포에 있어서 기존 견해와 달리 한반도에는 각시취만 분포하며, 제주도에는 큰각시취만 분포한다.

• Animal cells and systems
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• 제12권4호
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• pp.231-240
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• 2008

The gorgonian coral Anthoplexaura dimorpha Kukenthal, 1908(Gorgonacea: Octocorallia) is abundant in Jejudo Islands, Korea. To investigate the sexual reproduction of this species, we surveyed the morphology and cycle of gametogenesis. 5-6cm long fragments from 3-7 randomly chosen colonies were collected monthly at a depth of 12-24m in the water surrounding Munseom from August 2003 to August 2005. This species was gonochoric with sex ratio of 1.86:1(female to male), and had one annual reproductive cycle affected by elevation of seawater temperature. Oogenesis was longer than spermatogenesis as 12 months in female and 6 months in male. The planulae were not observed from the field survey and histological sections, which suggested broadcast spawning for the reproductive mode in this species. The possible spawning events may occur after the seawater temperature attain to the annual peak in September.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2019년도 전력전자학술대회
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• pp.422-423
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• 2019

In accordance with the Carbon-Free Island by 2030 policy of Jeju Special Self-Governing Province, renewable energy sources are increasing in Jejudo Island. Due to the intermittent output characteristics of wind turbines, one of the renewable energy sources, which can cause unbalanced system conditions between the demand load and the power generation of Jejudo Island. The Korea Power Exchange limits the output of wind turbines for stabilizing the Jeju power system. Therefore, this paper proposes a method to supply a limited output of Sangmyeong Wind Farm in Jeju Power system to Energy Storage System(ESS) and Water Electrolysis Device(WED). The voltage and frequency fluctuation of the Jeju power system is checked accordingly. The simulation results are performed using the PSCAD/EMTDC program.