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한국산 벗굴, Ostrea denselamellosa의 유생발생
양문호,한창희,김형섭,최상덕 한국패류학회 1999 The Korean Journal of Malacology Vol.15 No.2
We investigated the processes of egg and larval developments for aquaculture technique development of seedling production fo the flat oyster, Ostrea denselamellosa. Teo flat oyster of larviparous type was different from the pacific oyser (ovivarous type) because their larvae (trochophore and prodissoconch larvae) in the gill released into the seawater. The process of egg development was observed by artificial fertilization at $25^{\circ}C$, using a dissecting method. The sizes of Unfertilized eggs ranged from 80 to 90 $\mu\textrm{m}$ and fertilized eggs with globule-shape was 90-100 $\mu\textrm{m}$. The Polar body appeared after fertilization and egg cleavage began within 1 hour, reaching the blastula stage after 10 hours. The trochophore in the gill appeared 2-3 days after fertilization and grew to the prodissoconch larvae (130 140 $\mu\textrm{m}$) having a complete shell after 1-2 days. The shell of prodissoconch larvae grew to 205 220 $\mu\textrm{m}$ after 10 hours, and then they became umbo stage larvae showing oval in shape. The velum of umbo stage larvae was degenerated about 17-20 days after fertilization and grew into a pediveliger with a developed foot, at this time, the shell length size was 320 360 $\mu\textrm{m}$.
양문호,장린,박충기,민영일,장영운,방익수,김윤화 대한소화기내시경학회 1985 Clinical Endoscopy Vol.5 No.1
Tuberculosis of the esophagus is rare. We experienced four patients with esophageal tuberculosis proven by esophagoscopic biopsy or surgical specimens. Case 1 was a patient with primary esophageal tabereulosis, case 2 was a patient with teberculous esophagobronchial fistula and case 3,4 were patients with esoyhageal perforation due to tuberculous traetion diverticulum of the esophagus. The clinical, radiological and esapbagoscopic findings may be nonspecific in diagnosis of esophageal tuberculosis. Therefore early diagnosis should be rested on a high index of suapieion and a cautious attention.
해창만 벗굴, Ostrea denselamellosa 서식지의 환경특성
양문호,한창희,김형섭,최상덕 한국패류학회 1999 The Korean Journal of Malacology Vol.15 No.2
벗굴을 양식산업에 적용하여 그 생산성을 높일 수 있는 방안을 강구하기 위하여 이 종에 대한 자연서식지의 환경특성과 이매패의 자원량을 조사하였다. 벗굴 서식지 주변해역에서 수온은 5.5$^{\circ}C$-27.4$^{\circ}C$의 범위였고, 염분은 31.2-33.4 로 평균 32.3 였다. DO, COD, DIN 및 PO$_{4}$$^{3}$-P은 각각 평균 7.11 mg/L, 0.44 mg/L, 4.55 $\mu\textrm{g}$-at./L 및 0.36 $\mu\textrm{g}$-at./L이었다. 표층퇴적물의 입도조성은 사력질, 니사질, 사니질 등으로 다양하게 나타났으며, 퇴적물의 IL, COD 및 AVS는 각각 평균 2.6%, 13.70 mg/g dry 및 0.33 mg/g dry였다. 한편, 식물플랑크톤의 현존량은 90.3(9월)-1,272.0 cell/ml(2월)이었으며, 우점종은 Skeletonema costatum, Paralia sulcata, Eucampia zodiacus, Chaetoceros curvicetus, Chaetoceros affinis, Chaetoceros debilis, Chaetoceros decipiens, Asterionella glacialis, Pseudo-nitzschia longissima, Pseudonitzschia seriata, Ceratium furca, Ceratium fusus 등이었다. 벗굴 서식지에서 출현한 조개류는 벗굴(Ostrea denselamellosa), 참굴(Crassostrea gigas), 바지락(Tapes philippinarum), 새고막(Scaphaca subcrenata), 피조개(Scaphaca broughtonii), 키조개(Atrina pectinata), 새조개(Fulvia mutica), 진주담치(Mytilus edulis), 살조개(Protothaca jedoensis), 갈색이랑조개(Megacardita ferruginosa) 등 모두 10종이었다. 그리고 이매패류의 평균 자원량은 21개체/$m^2$(479.14 g/$m^2$)이었고, 벗굴은 0.25 개체/$m^2$(231.25 g/$m^2$)로 나타났다. This study was measured environmental factors of flat oyster habitats and biomass of flat oyster to improve the productivity of flat oyster. Water temperature and salinity of the flat oyster habitat ranged from 5.5 to 27.4$^{\circ}C$ and from 31.2 to 33.4 , respectively. Average concentrations of DO, COD, DIN and PO$\_$4/$\^$3/ -P were 7.11 mg/l, 4.55 $\mu\textrm{g}$-at./l and 0.36 $\mu\textrm{g}$-at./l respectively. Surface sediments at the sampling area were composed of coarse sand, sandy silt and silty sand. Average level of IL, COD and AVS in the surface sediments were 2.6%, 13.70 mg/g dry and 0.33 mg/g dry respectively. In each sampling station, total standing crops of phytoplankton showed peaks twice in February and August. Dominant species of phytoplankton occurred in Haechang Bay throughout the year were Skeletonema costatum, Paralia sulcata, Eucampia zodiacus, Chaetoceros curvicetus, C. affinis, C. debilis, C. decipiens, Asterionella glacialis, Pseudonitzschia longissima, Pseudonitzschia seriata, Ceratium furca and C. fusus. Ten species of the bivalves were collected at the flat oyster habitat. Most of bivalves were the eutrophic species Ostrea denselamellosa, Crassostrea gigas, Ruditapes philippinarum, Scaphraca subcrenata, Scapharca broughtonii, Atrina pectinata, Fulvia mutica, Mytilus edulis, Protothaca jedoensis and Megacardita ferruginosa. The mean density of them was 21 inds./㎡ (479.14 g/㎡), while that of the flat oyster was at 0.25 inds./㎡ (231.25 g/㎡).