• 대한지역사회영양학회:학술대회논문집
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• 대한지역사회영양학회 2005년도 10th Anniversary International Symposium
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• pp.8-19
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• 2005

• 대한치과의사협회지
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• 제39권10호통권389호
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• pp.829-839
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• 2001

• Journal of the korean society of oceanography
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• 제34권2호
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• pp.95-112
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• 1999

To investigate a phytoplankton community structure and its biomass distribution in the Korea Strait, phytoplankton pigments were quantitatively measured by HPLC method, with hydro-graphic conditions in August and October, 1996. The measured chi. a concentrations were in the range of 7.1-1,280.7 ng/1. Horizontal distribution pattern of chi. a in summer (August) was very different from that of autumn (October). High concentration of chi. a occurred near the coast with relatively low salinity (< 33%). Vertically, the highest concentrations of pigments at most of the stations were found near the surface and above the thermocline. The maximum concentration of chi. a in October was four times higher than in August. It was notable to measure relatively high concentration of chi. b up to 190.8 ng/1 in the study area, since chi. bcontaining green algae and prochlophytes have been ignored because of their minute size and sensitivity to common preservatives. Major carotenoids detected were fucoxanthin, zeaxanthin, 19'-hexanoyloxyfucoxanthin, and prasinoxanthin. Diatoms were the dominant group with secondary important groups as pryrnnesiophytes and cyanobacteria for the biomass of phytoplankton for both cruises. The dominant species of diatoms in summer were Thalassiosira sp. and Chaetoceros peruvianus. As minor groups, prasinophytes, crysophytes, and cryptophytes were confirmed by their marker pigments and dinoflgellates by microscopical observation. Degradation products of chi. a was minor. Interestingly, at 200 m depth of St A4, the deepest station in the western channel of the Korea Strait, substantial amounts of chi. a including fucoxanthin, 19'-hexanoyloxyfucoxanthin, chi. b, and degradation products of chi. a was measured from both cruises. Higher concentration (2-3 times) of those pigments were detected from samples in summer than in autumn. Small decrease in concentration of phosphate at this depth of St. A4 was also observed. It suggested that this bottom cold water was transported from the subsurface water with biomass of active phytoplankton, which was sunk and flowed southward.

• 한국수산과학회지
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• 제41권4호
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• pp.253-260
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• 2008

Gonadal development, gametogenesis, reproductive cycle, spawning, relative weight of flesh, and onset of sexual maturity of the murex shell, Ceratostoma rorifluum, collected from the rocky intertidal zone of Daehang-ri, Buan-gun, Jeollabuk-do, Korea were investigated monthly from January to December 2005 both cytologically and histologically. The gonads were widely placed on the digestive gland located in the posterior spiral fleshy part in the shell. C. rorifluum had separate sexes, and was an internal fertilizer. The sex ratio of females to males was approximately 1:1. The ovary and testis contained a great number of oogenic follicles and spermatogenic tubules, respectively. The oogonia and fully ripe oocytes were $15-19{\mu}m$ and $150-160{\mu}m$ in diameter, respectively, and the cytoplasm of the ripe oocytes contained a number of yolk granules. The relative weight of flesh reached a maximum in August($39.35{\pm}0.40%$), and then decreased rapidly in November($32.75{\pm}1.20%$). The percentages of female and male snails at first sexual maturity with shell heights ranging from 12.1-14.0 mm were 60.0% and 52.9%, respectively, while 100% of the snails of both sexes with shell heights over 18.1 mm were reproductively active. Based on the gonadal development and histological observations, the reproductive cycle of the snail could be categorized into five successive stages: early active(December to May), late active(March to July), ripe(June to September), spawning(July to October), and recovery(October to March). C. rorifluum spawned once a year between July and October, and the majority of spawning occurred in September when the seawater temperature exceeded $23.5^{\circ}C$.

• 한국해안해양공학회지
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• 제14권4호
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• pp.295-307
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• 2002

진해ㆍ마산만에서 수온, 염도 및 DO농도를 연직방향으로 1년동안 측정하였다. 관측된 수온 및 염도 자료를 이용하여 성층화 특성을 분석하고, DO농도의 연직변화를 성층화 특성 및 저질오염도와 관련하여 분석하였다. 분석결과, 진해ㆍ마산만의 수온 성층화는 4월 이전에 시작되어 10월경에 종료되는 양상을 보이고 있는 것으로 판단되었다. 또한, 1998년 4월 연직방향의 평균 염도변화는 3.9(equation omitted) 정도로 증가되고, 1998년 8월 9.3(equation omited), 10월 4.3(equation omitted) 정도가 유지되어 가을철에도 염도 성층이지속되고 있는 것으로 파악되었다. 한편, DO 농도는 성층화가 시작되는 4월을 기점으로 연직방향 평균 DO농도변화도 2.6(mg/L)에서 6월 8.3(mg/L), 8월 5.9(mg/L), 9월 7.24(mg/L), 10월4.4(mg/L)으로 명확한 성층화 양상을 보이고 있다. DO 농도변화는 전체적으로 해역의 오염도와 밀접한 관련이 있으나. 성층화 기간동안 연직방향 DO 농도편차가 크게 나타나고 있는것은 수온 및 염도성층에 의한 표 저층간의 물질교환 저해에 의한 영향도 직접적인 요인으로 작용하고 있은 것으로 파악되었다.

• 한국발생생물학회지:발생과생식
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• 제4권2호
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• pp.175-180
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• 2000

양산 내원사 계곡에 서식하는 난태생인 다슬기(Semisulcospira libertina libertina)를 재료로 하여 번식주기를 조사하였다. 서식지 수온은 연중 1.3~22.5$^{\circ}C$였으며, 육중량비는 수온이 상승하기 시작하는 3월에 최고값을 보였고, 8월에 최저값을 나타내었다. 난모세포의 평균 직경은 7월에 249.6$\pm$2.6 $mu extrm{m}$로 최대값을 나타냈으며, 12월에 134.3$\pm$2.8 $\mu\textrm{m}$로 연중 최소값을 보였다. 다슬기는 혹서기와 혹한기를 제외하고 주년 번식하는 종으로서, 연간 2회의 주된 번식주기를 가져, 암컷에서 분열증식기 3월ㆍ10월, 성장기 4~5월ㆍ11월, 성숙기 6~7월ㆍ12월, 배란기 8월ㆍ1월, 출산기 9~10월ㆍ3~5월, 휴지기 9월ㆍ2월, 수컷에서는 분열증식기 3월ㆍ10월, 성장기 4월ㆍ11월, 성숙기 5~6월ㆍ12월, 교미기 7~8월ㆍ1월, 휴지기 9월ㆍ2월인 것으로 판정되었다.

• 수산해양기술연구
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• 제50권4호
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• pp.633-642
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• 2014

Monthly variation in abundance and species composition of the fishes were investigated based on specimens collected by gill net in coastal water of Yeosu from October, 2009 and February, May, August, 2010. The collected fishes were 1,529 individuals (183,840g) of the total, identified into 6 orders, 16 families and 24 species. The most dominant order fish was Perciformes comprised 9 species, 7 families, and followed Pleuronectiformes comprised 5 species, 3 families, Scorpaeniformes comprised 5 species, 2 families. These 3 orders constituted 81.1% of the total collected fish. During the study, most dominant species was Hexagrammos otakii accounted for 189 individuals (12.4%) of the total, followed by Lateolabrax japonicus 165 individuals (10.8%), Hexagrammos agrammus 154 individuals (10.0%). The fish was collected by a gill net in coastal water of Yeosu from October, 2009 and February, May, August, 2010, the diversity index of the fishes was 2.09~2.66, which was the highest in August, 2010 and the lowest in February, 2010. The evenness index of them was 0.84~0.89, which was the highest in August, 2010 and the lowest in February, 2010 and the richness index of them was 2.02~3.14, which was the highest in October, 2009 and the lowest in February, 2010. The analyzed species diversity index by the each stations was 2.47~2.66 and the evenness index was 0.84~0.90 and the richness index 2.99~3.37. The similarity of community structure per season was very high which was the least in spring and fall. In addition, the community structure was very similar in state 3 and 2 out of each stations.

• 대한수의학회지
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• 제33권1호
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• pp.109-117
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• 1993

This paper dealt with the situation and the hatch rate of bot's eggs on the equine hairs in Cheju horse with the species grouping of the bot flies of equine(genus Gasterophilus). The prevalence and infection dynamics of Gasterophilus spp. larvae was also evaluated in the equine alimentary canal submitted in this laboratory for the necropsy or from the abattoir. Samples including Gasterophilus spp. larvae, bot's flies and its eggs, which were collected from the alimentary canal and equine hairs, respectively, were studied and classified by morphology. The morphologic feature of the spines of Gasterophilus larvae were studied by scanning electron microscope. 1. Gasterophilus intestinalis larvae concentrated in the nonglandular portions of the stomach. The infection of second-, and third stage larvae were common in November, and from January to October, respectively. Gasterophilus nasalis larvae were commonly identified on the gastric pylorus and upper portion of duodenum. Second stage larvae were found from October to December, and 3rd stage larvae, from January to September. 2. The hatch rate of laid eggs of Gasterophilus intestinalis was 28.4%, and that of Gasterophilus nasalis was 79.5%. The hatch rate of Gasterophilus intestinalis eggs was highest(62.5%) in December. The hatch rate of laid eggs were higher in the region of scapula(64.0%) and limbs(62.5%) than on the maned hairs. The eggs of Gasterophilus nasalis were completely hatched by October. 3. Eight hundred five Cheju horses examined in this study were infected with the eggs of Gasterophilus spp. Gasterophilus intestinalis eggs on the body regions from sixty horses were recognized in phalangeal (14.4%), in abdominal(13.8%), metacarpal, brachial and cervical regions. Gasterophilus nasalis eggs were uncommon and recognized in submandibular regions(1.4%). 4. In conclusion, the infection of imago, larvae and eggs of both Gasterophilus intestinalis and Gasterophilus nasalis were indentified in cheju horse.

• 한국자원식물학회지
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• 제8권2호
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• pp.175-182
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• 1995

This study was carried out to investigate the check shelling distribution of Lindera erythrocarpa Makino in Kanghwa Island, MT. Suri, Kyunggido and MT. Kaya, Chungchongnamdo. The results were as follows : The total distribution area of Linedra erythrocarpa where are Jeondeung temple and Jugsu temple Kanghwa Island, MT. Suri, Kyunggido and MT. Kaya, Chungchongnamdo was 344.4ha and the total number of Linedra erythrocarpa was 3,224. The total number of femle Linedra erythrocarpa was625(22.2%) except the seedlings under 2cm of DBH(Diameter breast of height). For the estimation of tree age by counting of tree rings, the regression equation was Y=1.79X+9.47($R^2$=0.83, DBH=cm). The soil acidity of stands studied was $pH4.6{\sim}pH5.8$. And the soil acidity of Seoul was $pH4.2{\sim}pH4.5$ So for the Planting Linedra erythrocarpa in Seoul area, the soil acidity of planting area should be changed to $pH4.6{\sim}pH5.8$. The flower size of and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. The length of petiole of male and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. The length of petiole of male and female of Linedra erythrocarpa was 5.96mm, 3.66mm, respectively. And the number of flowers per flowering bud of male and female were 13.4, 11.2, respectively. The flowering period of Lindera erythrocarpa in Suwon was 21 days from May 2 to May 22. And The leaf continuing period of Lindera erythrocarpa in Suwon was 203 days from April 7 to October 27. And the fall-foliage color continuing period was 10 days from October 18 to October 27. The fruit continuing period of Lindera erythrocarpa in Suwon was 61 days from September 26 to November 26.

• 한국수산과학회지
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• 제2권1호
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• pp.71-82
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• 1969

The present investigations were carried out with the purpose of making clear the fundamental features of the seasonal variations in chemical composition of the brown algae. Three species of samples, Ecklonia cava, Sargassum sagamianum and Hizikia fusiforme have been analyzed monthly for their contents of total ash, crude protein, alginic acid, mannitol, and laminarin over a year period. Three kinds of samples were collected from the same locality, situated on the southern coast of the Che-ju Island, from September 1966 to August 1967. In addition, the comparative analysis was made on fronds and stipes of the plant for their chemical composition. The results obtained are summarized as follows: 1, In general, the three species examined underwent a similar mode of seasonal variation, and no essential difference was detected among them. 2. The chemical composition of the plant exhibited a considerable difference between the species. The content of total ash in H. fusiforme was remarkably higher than those in the two other species respectively. The alginic acid content was relatively high in S. sagamianum and low in H. fusiforme. The contents of crude protein, mannitol and laminarin were appreciably high in E. cava and low in H. fusiforme in general. 3. The most outstanding feature in the seasonal variation was that, in general, the total ash, crude protein, and alginic acid contents were at a maximum in the winter months while laminarin and mannitol contents were at a minimum. The converse was true in summer. Total ash-Maximum values were observed from December to February and minimum from August till October. Crude Protein-All species exhibited maxima in January and February, and minima from August to October. Alginic acid-Maximum contents occured from January to March and minimum from September to November. Mannitol-The maximum content of mannitol was In May and lune and minimum in January, February and March. Leminerin-Maximum content was in September and October, and minimum in January and February. 4. The wide seasonal variation in chemical constitution occured in the fronds, but the stipes showed a slight seasonal variation. In the chemical composition, the stipe was high in alginic acid, low in mannitol and laminarin. The reverse was in the frond.