• Animal Systematics, Evolution and Diversity
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• v.39 no.3
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• pp.127-132
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• 2023

Aquilonastra doranae, a newly recorded sea star, was collected from the southern coast of Jejudo Island by a trimix SCUBA diving survey in May 2021. The newly collected specimen is distinguished from a previously known Aquilonastra species in South Korea by having a fissiparous body form with six arms. Results of pairwise genetic distance analysis showed that the new specimen was identical or close to A. anomala from Hawaii (0.0%), Australia (3.1%), and Samoa (3.3%). However, morphological characteristics of the Korean Aquilonastra specimen corresponded with the original description of A. doranae, not that of A. anomala, including the number of inferomarginal spines, the absence of pedicellariae, and the inhabit locality. Thus, this study agrees with the original morphological study of A. doranae and presents this specimen as the first record of A. doranae in South Korea.

• Korean Journal of Ichthyology
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• v.35 no.4
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• pp.372-377
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• 2023

This is the first report of Trachinotus blochii (Perciformes: Carangidae) from Korea. Single specimen (89.8 mm SL) was collected by seine fishing from the coastal waters of Busan on 13 September, 2023 and two specimens (29.53~30.78 mm SL) were collected by scoop net from Jejudo Island, Korea. This species is distinguishable from the most similar species, Trachinotus blochii as follows: it has the no black spots (vs. black spots in T. baillonii), 21~25 dorsal fin rays (vs. 18~20), and 20~24 anal fin rays (vs. 16~18). In order to confirm their taxonomic status, their mitochondrial DNA cytochrome c oxidase subunit I sequences were obtained and compared with those of carangid species recorded in the NCBI database. As a result, it was perfectly matched to T. blochii, and differed from T. baillonii (genetic distance=5.46%). We propose a Korean name, "Mu-jeom-mae-ga-ri", for the species.

• Journal of the Korean Society of Hazard Mitigation
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• v.2 no.1 s.4
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• pp.161-167
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• 2002

Forest fire danger period in nine Provinces (Gangwondo, Kyonggido, Gyeongsangnamdo, Gyeongsangbukdo, Jeollanamdo, Jeollabukdo, Jejudo, Chungcheongnamdo, Chungcheongbukdo) has turned out to be similar to recognize whether there are some differences between each Provinces, we used correlation analysis with number of occurrence and damage area by an interval of ten-day period. Based on this analysis, there was significant numbers of occurrence at all areas wish serious burns except Gyeongsangnamdo and Jejudo Provinces. Since persuasive power is insufficient as danger period of forest fire applies equally to nine Provinces, statistical analysis using number of forest fire occurrence and burned area are executed. And then, a analysis of variance(ANOVA) test of significance by an interval of ten day period is carried out. As a result of this analysis, there showed significant at 1% level for number of occurrence except Jejudo, and is also showed significant at 1% level for burned area except Gangwondo and Chejudo. Through regional correlation analysis for danger period, we classified three parts of Middle region (Gangwondo, Kyonggido, Gyeongsangnamdo, Gyeongsangbukdo, Jeollabukdo, Chungcheongnamdo, Chungcheongbukdo) Southern region (Gyongsangnamdo, Jeollanamdo) and Jejudo region. With respect to forest fire occurrence time, Middle region showed from the middle of February to first of May that amounts to 81% of entire occurrence in this region, and Southern region begins with at the last of January to the middle of April covering 71%. In terms of forest fire burned areas, it appears at the middle of February to the first of May, occupying 98% in Middle region, and Southern region showed burned areas from the last of January to the middle of April amounting to 82% of total occurrences.

• Korean Journal of Plant Taxonomy
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• v.51 no.1
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• pp.10-17
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• 2021

Invasive alien species management is pivotal for biodiversity conservation. Commelina caroliniana Walter, from the family Commelinaceae, is an alien plant native to the Himalayas and India, but it has been widely introduced around the world, including in the United States, Brazil, Philippines, and Japan. In Korea, the first population was found growing adjacent to agricultural land and farm roads on Jejudo Island, and field observations confirmed the presence of at least nine populations there. It is similar morphologically to C. diffusa Burm. f. but can be distinguished by involucral bracts that are ciliate at the base, hairs on the peduncle and obsolete upper cincinnus, brown spots on its 4-lobed antherode, and seed surfaces that are smooth to slightly alveolate. It was determined to have an invasiveness low score of 8 according to the Korean 'Invasive Alien Plant Risk Assessment', suggesting that it may spread to natural habitats. Although the current distribution of C. caroliniana is restricted to Jeju-si, it has spread dramatically in many other areas of the world. At present, it has had a limited impact on the local environment, but local and regulatory authorities should pay close attention to this plant and take measures to prevent its expansion in the future.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.15 no.2
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• pp.161-170
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• 1982

A trial on the seed production of red sea-bream (Chrysophrys major) was made in Jejudo island at the southern end of Korea, from June, 1980 to August, 1981. Histological observation of the gonads indicated that the main spawning season was June to early July in Jejudo area. The newly-hatched fry were fed Brachionus sp. in the later stages Artemia nauplii, Tigriopus sp. and the minced fish flesh were given. Though during the winter season the water temperature in rearing tanks was decreased as low as $9.2^{\circ}C$, continuous feeding to the juveniles was carried out, showing body weight increase. This implies that winter rearing of juveniles in the near-shore facilities is feasible in the vicinity of Seogwipo area, in Jejudo. Feed coefficient of the juveniles (>23.2 g) was $4.16\sim4.77$ when fed the minced fish flesh.

• Tuberculosis and Respiratory Diseases
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• v.56 no.4
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• pp.356-363
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• 2004

Background : The nationwide tuberculosis registry system in Korea has been operated with the dual reporting system - public health center (PHC) and private medical services (PMS) - since 2000. While three-fifths of the registered cases in 2002 was reported by PMS, it was reported that the success rate of patients at PMS was lower than that at PHC. To identify the problems of the patients' management at the PMS as well as the PHC in a community is the aim of this paper. Methods : The subject was selected from the registered cases of the pulmonary tuberculosis in Jejudo, 2002. The needed items for this study were gathered by the reviewing the medical charts directly. Results : Of the 262 patients included in the subject, 92 cases (35%) were treated initially at PMS. The sputum smear as an essentially diagnostic test was carried out with 69.2% at private clinics compared with 98.2% at PHC. The success rate of the treatment at PMS was 59.8% so that it had a statistically significant difference from that at PHC (80.0%; p<0.01). Conclusion : These results showed that there were several problems in diagnosis and treatment for the patient of pulmonary tuberculosis at PMS. To improve the success rate of the treatment at PMS, the nationwide clinical guideline for control of pulmonary tuberculosis should be systematically disseminated and strongly recommended at PMS by the government.

• Korean Journal of Ichthyology
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• v.35 no.1
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• pp.44-49
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• 2023

A single specimen of the genus Bothus (family Bothidae) was collected for the first time at the intertidal zone of Moseulpo Port, Daejeong-eup, Seogwipo-si, Jejudo Island, on 14 August 2022. The specimen was identified as Bothus pantherinus in having following morphological traits: dark spots and ring-shaped patterns near eyes and the pectoral fins, one distinct spot in the center of the lateral line, 75 lateral line scales, and seven hourglass shaped supracranial pterygiophores. As a result of analyzing 603 bp of mitochondrial DNA COI sequences, our specimen was perfectly matched to those of B. pantherinus registered in NCBI. It has been known that the species is widely distributed throughout the Indo-Pacific Ocean from Red Sea to Hawaiian (32 degrees north to 32 degrees south), but this study revealed that its distribution expanded to the waters of Jejudo Island (33 degrees north), Korea. We propose its new Korean name "Beot-kkoch-mu-nui-dung-geul-neob-chi".

• Korean Journal of Ichthyology
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• v.36 no.2
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• pp.193-198
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• 2024

Two specimens of Ostorhinchus fleurieu (54.25 mm, 55.64 mm SL) were collected by angling for the first time from Seogwipo-si, Jejudo Island, Korea on September and November 2023. This species is readily distinguished from the congeneric species, O. aureus by the number of total gill rakers (19~23 in O. fleurieu vs 22~27 in O. aureus) and shape of dark stripe on caudal peduncle (poorly defined, barrel shaped in O. fleurieu vs. well-defined, hourglass shaped in O. aureus). A total of 560 base pairs of mitochondrial DNA cytochrome c oxidase subunit I region of our two apogonid individuals perfectly matched with those of O. fleurieu (MT076481) registered in NCBI. Here, we propose the new Korean name "Kkoch-dong-gal-dom" for the species O. fleurieu.

• Korean System Dynamics Review
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• v.7 no.2
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• pp.191-213
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• 2006

Increasing of the number of Roe Deer in Jesudo is regarded as an direct cause of the damages of Roe Deer - i.e. damages of crops and trees by Roe Deer and traffic accidents between human and Roe Deer. But, no study of the number of Roe Deer in Jejudo has been found and never has been progressed it and nobody convinces about the total number of Roe Deer in Jejudo. In this paper, we focus at the moving pressure which enforces Roe Deer to move the other places. Moving pressure is appeared when the habitat environment destruction of Roe Deer and it forces Roe Deer in hilly section to move the middle mountains section and the low section. This moving pressure promotes the moving of Roe Deer to the other places and then the total number of Roe Deer in new places are increasing. High density of Roe Deer makes the habitat environment bad and increases the competition of Roe Deer. These patterns are repeated continuously. The habitat environment of Roe Deer is related with human life area very closely. We should keep and preserve our nature and environment, and if we develop our nature then we must consider our ecosystem in all aspects. It's the most important thing to us and Roe Deer and other living things.

• Korean Journal of Plant Taxonomy
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• v.43 no.2
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• pp.94-98
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• 2013

A new species, Daphne jejudoensis M. Kim, has been named and described from Seonheul, Jejudo Province, Korea. Daphne jejudoensis shares several characteristics (white calyx colors, long calyx tube, evergreen leaves, leathery leaf textures, etc.) with its related species D. kiusiana, but it is distinct from D. kiusiana which has a hairy calyx tube and lobes, short calyx lobes, oblanceolate leaves (with acute apex), and a different distribution (coastal region in Geojedo Is.) by having a glabrous calyx tube and lobes, long calyx lobes, elliptic leaves (with acuminate apex), and by its distribution (inland region in Jejudo Is.).