• Journal of Ecology and Environment
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• v.29 no.2
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• pp.85-103
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• 2006

An investigation of fauna and community of insects in Gotjawal Terrain, Jeju-do, had been conducted with a way of black light trap from July to September, 2005. The investigated insects were classified into 217 species, 75 families, and 11 orders respectively. Coleoptera that occupied 55.3 percent among them and was consisted of 120 species was the richest group and Hemiptera followed it. The density of Physopelta gutta was highest but Physopelta cincticollis was overall the dominant species in all sampling areas. The species diversity index was highest at Jocheon-Hamdeog Gotjawal in Jeju-do, while it was lowest in Gujwa-Sungsan Gotjawal. Clustering analysis revealed that the insect communities of four localities were grouped in only one cluster. Included in the species unreported in Jeju Island were Menida musiva and Pentatoma japonica in Hemiptera, Philonthus wuesthoffi in Coleoptera, and Phanerotoma flava in Hymenoptera.

• Korean Journal of Veterinary Service
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• v.14 no.2
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• pp.104-109
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• 1991

Tile present study was carried out to investigate the incidence of bovine brucellsis in Cheju-do during the period from 1985 to 1990. The results were summarized as follows. 1. In the total 239,238 cattles tested. 1180(0.49%) were positive by standard tube agglutination test during the period from 1985 to 1990. 2. The major causes of incidence on brucellosis was grazing with carriers and repeated incidence in a herd. 3. The 13 Brucella abortus biotype 1 isolated from 10(50％) of 20 cattles slaughtered on brucellosis in 1990.

• Journal of agricultural medicine and community health
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• v.7 no.1
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• pp.50-56
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• 1982

This study was undertaken to evaluate the present status of parasitic infection and swine pen human latrine system in Cheju Do, from July to September 1982. The 663 stool specimens (male 323 and female 340) and 579 scotch tape anal swabs collected from 161 households of 2 areas in Cheju Do were examined. The methods employed were formalin-ether technique for the prevalence rate of various helminthic and protozoan infection, and scotch tape anal swab technique for the prevalence rates of Enterobius vermicularis. In addition to these, questionaire was used to evaluate the present status of swine pen human latrine system and prevalence rates of taeniasis in these areas. The results are as follows ; 1) Prevalence rates of parasitic infections of any kind was 33.9%. It was 35.7% in Cheju City in contrast to 32.1% in North Cheju Gun. The infection rates of Trichuris trichiura was 10.0% and it was the highest prevalence rate in this survey. The prevalence rates of the other parasites were as follows ; Ascaris lumbricoides 2,3%, Hookworm 0.2%, Clonorchis sinensis 0.5%, Hymenolepis nana 1.5%, Entamoeba coli 3.2%, and Giardia lamblia 0.5%. 2) The infection rates of Enterobius vermicularis in 579 peoples (male 285, female 294) by applying scotch tape anal swab technique was 13.1% through the survey. It was 16.9 in Cheju City and 8.5% in North Cheju Gun. 3) The Infection rate of Taenia species by applying the stool examination and making up a question was 19.2%(21.4% in Cheju City and 16.7% in North Cheju Gun). 4) Sexual distribution of the parasitic infections showed slightly higher rate in female than that of male. 5) The positive rates of parasitic infection by the stool examination and questionaire positive cases of taeniasis were higher in 0-9 and over 60 year old than any other age group. 7) The swine pen human latrine systems were used in 46 households (28.6%). 7) Relationship between swine pen human latrine system and taeniasis was not noted.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2010.04a
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• pp.135-138
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• 2010

• Korean Journal of Pharmacognosy
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• v.7 no.1
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• pp.35-40
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• 1976

The plant distributions in the Na-Ree Dong in Dagelet Island and Baik-Rok Dam in Cheju Island were investigated and 143 genera, 187 species of plants were found in the Na-Ree Dong in Dagelet Island during 15 years from 1961 to 1975. From 1957 to 1975, 113 genera, 174 species of plants were found in Baik-Rok Dam in Cheju Island.

• Proceedings of the Korean Society of Crop Science Conference
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• 2001.05a
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• pp.164-165
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• 2001

• Journal of Fisheries and Marine Sciences Education
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• v.9 no.1
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• pp.57-70
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• 1997

The Government is managing "The Comprehensive Development Plan of Fishing Villages" which is a national program to ensure the effective use of the coast and reasonable management of fisheries resources. The Chuja-do was selected as an area for "The Comprehensive Development of Fishing Villages" because it has the characteristics of local independence and an advanced fishery using boats. The study covered the environment of the local fishing grounds, all aspects of the coast fishing and residents' thinking. The results of the study led to the following proposals : development of the coastal fishing grounds farmining industry, establishing the fishing grounds industry by dropping arcificial fish reefs, developing the tourist industry, improving the quality of fishery using boats, and establishing high quality fishing specialties.

• Korean Journal of Animal Reproduction
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• v.10 no.1
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• pp.71-75
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• 1986

Feeding ratio in relation to milk production, usage of silage, hay and minerals and vitamin suplement were investigated from 5 dairy farms located in the areas of Cheju city, Jochun, Hallim an Sung-up. In this survey conducted on the dairty cow of 51 farms in the four districts of Cheju-do, it was suspected that the reproductive disorders seemed to be high because of inadequate feeding of roughages (especially silage) and increasing feeding of concentrated feeds. The average milk production of dairy cows was 21.3 Kg in spring, 19.3 Kg in summer, 16.2 Kg in fall and 15.7 Kg in winter.

• Journal of Environmental Science International
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• v.15 no.3
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• pp.271-278
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• 2006

To investigate the variations of physico-chemical factors and microbial population, in ten stations at water region of coastal area of Chagwi-Do, Nutritive salts, water temperature, transparency, suspended solid, salinity, COD, DO, pH, heterotrophic bacteria, coliform group and Vibrio spp. were analysed three times in September, November in 2004 and February in 2005. Heterotrophic bacteria in surface water was $3.5X10^1{\sim}1.16X10^3cfu/ml,\;1.0X10^2{\sim}5.2X10^1cfu/ml\;2.0X10^1{\sim}7.6X10^1cfu/ml$ and bottom water counted $7.0X10^2{\sim}1.0X10^3cfu/ml,\;1.4X10^1{\sim}2.5X10^2cfu/ml\;2.0X10^2{\sim}4.2X10^1cfu/ml$ in September, November in 2004 and February in 2005, respectively. The cell number of total coliform bacteria in the surface water amounted to $0{\sim}4.3X10^2cfu/ml,\;0{\sim}6.0X10^1cfu/ml,\;0{\sim}1.0X10^1cfu/ml$ and bottom water amounted $0{\sim}2.2X10^2cfu/ml,\;0{\sim}5.4X0^2cfu/ml,\;0{\sim}2.0X10^1cfu/ml$ in September, November in 2004 and February in 2005, respectively. As for Vibrio spp., the cell number in the surface water was $1.0X10^1{\sim}2.5X10^2cfu/ml,\;1.0X10^1{\sim}2.0X10^1cfu/ml,\;0cfu/ml$ and bottom water counted $1.0X10^1{\sim}5.2X10^2cfu/ml,\;0cfu/ml,\;2.0X10^1cfu/ml$ in September, November in 2004 and February in 2005, respectively.

• Journal of Korean Society of Forest Science
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• v.78 no.1
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• pp.42-54
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• 1989

These studies were carried out to examine the anatomical, karyological characteristics, the variation of isozymes in needle and the frost damage of tissue for the purpose of investigating the relationships among the three natural Torreya nucifera populations of Cheju-do, Namhae, and Mt. Naejang in Korea. The results obtained can be summed up as follows : 1. The numbers of endodermal cells and inner layer cells of mucilage canal of needle conductive tissue were different in each population. The number of those of Cheju-do population was the largest. 2. In somatic chromosome, Namhae population showed one more secondary constriction. The values of $b^{arm}/a^{arm}$ were the same in all the three populations, but Cheju-do population particularly showed a different minimum value. And the karyotype formulas of each population showed difference. 3. During the meiosis, each population showed no significant difference in the irregular phenomena of chromosome. 4. In isoperoxidase and esterase variations of needle, each population showed its particular number and variation of bands. Cheju-do population showed the largest number and greatest variation of bands. 5. Under the same freeging conditions, the frost damage of Mt. Naejang population was comparatively slight, and Cheju-do population suffered from a greater frost damage than the others.