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수온과 체중을 고려한 멍게(Helocynthia roretzi)의 여수율
정우건 ( Woo Geon Jeong ),조상만 ( Sang Man Cho ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.6
In order to understand the co-culture impact of the sea squirt Halocynthia roretzi on the Pacific oyster Crassostrea gigas, we examined the filtration rate of the sea squirt in relation of water temperature (5-25℃) and body weight. The filtration rate increased in relation to body weight and water temperature, indicating a clear positive correlation with the two variables. Due to the clear positive correlation between filtration rates at each temperature groups for acceptable collinearity, each constants at regression equation was further analyzed for a unified model of filtration rate. Therefore the filtration rate of H. roretzi was estimated as: Fr (L/h/animal) = (0.1956+0.0182T)×DW0.7978EXP(-0.0273T) for water temperature in the range of 5-25℃. The estimated filtration rates of H. roretzi were higher than those of C. gigas in the winter season (water temperatures below 16℃) in condition of equal body weight. Our results indicate that H. roretzi may have an advantage over C. gigas in food competition during the winter season when the two species are co-cultured.
최종덕(Jong Duck Choi),정우건(Woo Geon Jeong),김풍호(Poong Ho Kim) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.3
A bacteriological study of sea water and oyster in Charan Bay was conducted to evaluate sanitary conditions of the bay and compliance of waters with the recommended bacteriological criteria for the designated area of shellfish cultivation. The Samples were collected at 23 sampling stations(Fig. 1 and Fig. 2) established once a month from January 1997 to December 1997. During the study period, temperature ranged from 4.7 to 25.6℃, transparency ranged from 3.3 to 6.2m, chemical oxygen demand ranged from 1.67 to 2.18 ㎎/ℓ, dissolved oxygen demand ranged from 5.4 to 10.0 ㎎/ℓ, dissolved nitrogen ranged from 1.65 to 7.88㎍-at/ℓ, phosphate ranged from 0.15 to 1.16㎍-at/ℓ, Chlorophyll-a ranged from 0,95 to 12.69 ㎎/ℓ, respectively. The coliform group and fecal coliform MPN`s of sea water were ranged from <1.8∼1,600 and <1.8∼540, respectively. The coliform group and fecal coliform MPN`s of oysters were ranged from <18∼16,000 and <18∼1,400, respectively. The viable cell counts in oyster ranged from 1.5×10^2 to 7.5×10^7. The bacteriological criteria of sea water in shellfish growing area should be less than 70 per 100 ㎖ of sea water for median value of coliform MPN, and below 10% of the samples .which contain over than 230 for coliform MPN or over than 43 for fecal coliform MPN. The sea water from 432 samples were complied water coliform criteria recommended far designated shellfish growing area, The coliform group, fecal coliform, classification of coliform group with IMViC reactions and pathogenic vibrios were analyzed. During the study period, infectious bacteria such as Vibrio cholerae, Salmonella sp. and were not detected from the samples, but detection ratios of Vibrio parahaemolyticus and Vibrio vulnificus were 7∼17% summer months.
최종덕(Jong Duck Choi),정우건(Woo Geon Jeong) 한국수산과학회 2001 한국수산과학회지 Vol.34 No.6
통영항 내의 해수 및 저질의 물리 화학적 해양환경 특성과 해수의 위생지표세균을 비롯한 병원성 세균의 시험결과가 횟집의 수족관의 세균학적 수질에 적합한지에 대하여 검토하였다. 조사기간중 통영항 해수는 수온 6.8℃∼25.2℃, 투명도 1.0∼2.5 m, 화학적산소요구량 1.79∼2.41 ㎎/ℓ, 용존산소 5.7∼10.1 ㎎/ℓ, 용존 질소 6.59∼10.53 ㎍-at/ℓ, 인산염 0.56∼1.01 ㎍-at/ℓ, chlorophyll-a는 1.21∼9.54 ㎎/㎥ 범위였으며 염분농도는 30.11∼31.47‰였다. 통영항 해수의 생균수는 조사기간 중 ㎖당 log수가 4.2∼6.8 (3.0×10⁴∼6.9×10^6 CFU/㎖) 범위에 평균 5.3이었다. 월별로는 1∼3월이 적었고, 7∼9월이 많았다. 통영항 내 조사해수의 84.3%와 93.1%가 패류수출해역 수질기준 중 total coliform group과 fecal coliform group의 기준치를 각각 초과하였다. 대장균군형은 Escherichia coli group이 66.1%를 차지하였고, 그 중 Type I이 56.5%, Citrobacter freundii group이 11.0%, Enterobacter aerogenes group이 9.69%, 기타 29균주로 13.3%에 해당하였다. 그런데 전형적인 온혈동물의 장관유래균인 E. coli type I이 전체의 56.5%를 차지하였다. 통영항내 해수에서 Salmonella sp. 나 Shigella sp. 및 Vibrio cholerae O1은 검출되지 않았으나 V. parahaemplyticus, V. vulnificus 및 V. cholerae non-O1 등의 검출율은 10.4∼35.4%에 달하였다. The bacteriological and physiochemical analysis of seawater in Tongyeong harbor was conducted to evaluate sanitary conditions. The samples were collected at 6 stations established once a month from January to December, 2000. During the study period, the ranges of temperature, transparency, chemical oxygen demand, dissolved oxygen, dissolved nitrogen, phosphate and chlorophyll-a were 6.8∼25.2℃, 1.0∼2.5 m 1.79∼2.41 ㎎/ℓ, 5.7∼10.1 ㎎/ℓ, 6.59∼10.53,㎍-at/ℓ, 0.56∼1.01 ㎍-at/ℓ and 1.21∼9.54 ㎎/㎥, respectively. The viable cell counts of seawater in Tongyeong harbor ranged from 3.0 ×10⁴ CFU/㎖ to 6.9 ×10^6 CFU/㎖. The coliform group and fecal coliform MPN`s of the samples were ranged 23∼4,600 MPN/100 ㎖ (means 540 MPN/100 ㎖) and 11∼1,600 MPN/100 ㎖ (means 210 MPN/100 ㎖), respectively. The coliform group was classified with IMViC reactions and pathogenic vibrios were analyzed. Two hundred eighteen strains that were obtained from seawater samples in Tongyeong harbor represented Escherichia coli group, 66.1%; Citrobacter freundii group, 11.0%; Enterobacter aerogenes, 9.6%; and unknown, 13.3%, respectively. During the study period, infectious bacteria such as vibrio cholerae Ol, Salmonella sp. and Shigella sp. were not detected from the samples, but detection ratios of v. parahaemolyticus, v. cholerae non-Ol and v. vulnificus were 10.0∼30.1%.
정보영(Bo Young Jeong),문수경(Soo Kyung Moon),정우건(Woo Geon Jeong),하해성(Hae Seong Ha) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.6
Proximate compositions of muscles and eggs between wild sweet smelt, which were caught in Seomjin river and Miryang river, and cultured sweet smelt, which were purchased from certain cultured farms in Hadong and Miryang, were compared. Proximate compositions of wild sweet smelt muscles were 76.7∼77.5% for moisture, 18.4∼19.9% for protein, 2.41∼3.47% for lipid, and 1.04∼1.33% for ash content, and there were almost no differences between the fishes from Seomjin and Miryang river. Protein and ash content in the cultured fish muscles were similar to those of the wild fish muscles, while the former contained much more lipid and carbohydrate, and less moisture than the latter, especially lipid content differed greatly according to their cultured farms. This might be the result of their different diet compositions. Lipid, protein and carbohydrate content in eggs of the wild and cultured fishes were much higher than those in their muscles. There was a negative correlation between moisture and lipid content in all samples; y=-0.2715x+24.903 (r=-0.7253, p<0.001).
정보영(Bo Young Jeong),최병대(Byeong Dae Choi),문수경(Soo Kyung Moon),이종수(Jong Soo Lee),정우건(Woo Geon Jeong),김풍호(Poong Ho Kim) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.2
Proximate composidon, sterol and α-tocopherol (α-Toc) contents of 35 species of marine invertebrates (13 species of Bivalvia, 10 species of Gastropoda, 4 species of Cephalopoda, 4 species of Crustacea, 2 species of Ascidacea and 2 species of Holothuroidea), which caught off the coast of Tongyeong of the Southern sea (Nam-Hae), Korea, were determined. Protein content showed relativel high level in herbivorous (seaweed feeder) and carnivorous species such as Gastropoda (17.2 4.30%), Crustacea (16.8±4.06%) and Cephalopoda (15.3±3.24%), but showed low in plankton feeder and mud swallow such as Bivalvia (11.8±2.49%), Asadacea (8.20 1.00%) and holothuroidea (3.94±1.13%). Total lipid (TL) content was low in most madne invertebrates, ranged from 0.24% (blue colored sea cucumbers) to 1.96% (sea squirts). Ascidacea contained the largest amount of TL in all sampks, while Holothuroidea contained the smallest amount of TL, and other classes contained about 1% of TL. Carbohydrates was rich in plankton feeder and 6erbivorous species (seaweed feeder) such as Ascidacea (6.60±4.53%), Bivalvia (3.15±1.82%) and Gastropoda (3.02±1.61%), while poor in carnivorous species such as Crustacea (0.52±0.57%) and Cephalopoda (1.00±0.63%). Moisture content was highest in Holothuroidea (92.0±1.94%) and the lowest in Gastropoda (77.0±1.95%). There were negative correlations between moisture and protein content, or TL, between protein and TL content; y=-0.8716x+84.452 (r=-0.87, p<0. 001), y=128.52e^(-0.0601x) (r=-0.55, p<0.001), y=6.3047e^(-0.0904x) (r=-0.42, p<0.02), respectively. Sterol content was ranged from 56㎎/100g edible portion of red colored sea cucumbers to 216 ㎎/100g edible portion of cockle and was high in the following order; Cephalopoda (148±30.0 ㎎)>Bivalvia (121±35.0 ㎎)>Gastropoda (118±29.0 ㎎)>Crustacea (116 31.0±㎎)>Ascidacea (78.0±2.00 ㎎)>Holothuroidea (62.0±8.00 ㎎). Crustacea contained 1∼2 ㎎ α-Toc/100g edible portion whereas other classes contained trace or less than 1㎎/100 g of edible portion.