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Joon Taek PARK(朴俊澤),Kyeong Ho HAN(韓景鎬),In chul BANG(房仁哲),Gyu Hwa CHUNG(鄭圭和) 전남대학교 수산과학연구소 1997 수산과학연구소논문집 Vol.6 No.-
The life history was described to provide basic information for seedling production of the Korean perch, Coreoperca herzi. They inhabit predominantly rocky bottoms, and are preferentially carnivorous, feeding on small fish, shrimp, etc. The smallest size of sexual maturation was thought to be about 80.0㎜. According to the considerable size differences of eggs in the individual ovaries, it was concluded that they spawns several times within a spawning season of May~June. The ripe eggs were demersal and adhesive, and their diameter were 2.6~2.9㎜ with several oil globule of 0.10~0.64㎜. Morphological changes of the larvae were also investigated. The first cell cleavage occurred 2 hour and 30 min. from fertilization. Artificially fertilized eggs were hatched with about 300 hours incubation at 21.5~22.0℃. The newly hatched larvae were 7.0~7.5㎜ in total length with a single oil globule. The yolk was completely absorbed on the 6th day after hatching when the larvae attained about 9.0㎜ in total length and started feeding with alone or mixed with rotifer(Branchionus plicatilis) and Artemia nauplii.
한국産 꺽지(coreoperca herzi)의 종묘생산
한경호(Kyeong Ho HAN),박준택(Joon Taek PARK),정규화(Gyu Hwa JUNG),조재권(Jae Kwon CHO),오성현(Sung Hyun O),홍지선(Chi Sun HONG) 전남대학교 수산과학연구소 1999 수산과학연구소논문집 Vol.8 No.-
This study was conducted to develop the effective seeding production of Korean aucha perch, Coreoperca herzi. Time need for hatching and survival rate of fertilized eggs, growth and survival rate of the larvae and juveniles reared at different water temperatures(18.0±0.5℃, 21.0±0.5℃, 24.0±0.5℃) and rearing densities (300, 600, 900 ind./160ℓ) were investigated. And also, growth and survival rate of Korean aucha perch juveniles fed experimental diet(compound meal+Artemia nauplius+Daphnia sp.; Artemia nauplius+Daphnia sp.; compound meal) were determined. The required time for hatching and hatching rate of eggs after insemination in different water temperatures were 400~412 hours(98.5%) at 18.0±0.5℃, 288~296 hours(95.4%) at 21.0±0.5℃, 218~237 hours(87.4%) at 24.0±0.5℃, respectively. The fastest growth of fingerings reared at different water temperature were obtained at 24.0±0.5℃ followed by 21.0±0.5℃, 18.0±0.5℃ and the highest survival rates were 82.5%, 70.2% and 60.5%, respectively. The growth and survival rates of larvae for 100 days were 50.5±1.0㎜, 90.5% at 300 ind./160ℓ group, 43.5±1.0㎜, 75.5% at 600 ind./160ℓ group and 41.3±1.0㎜, 63.2% at 900 ind./160ℓ group, respectively. In the groups of Korean aucha perch, Coreoperca herzi fed the experimental diet, the highest growth and survival rate was shown in mixture of compound meal, Artemia nauplius and Daphnia sp. feeding trial group.
방인철(In Chul Bang),남윤권(Yoon Kwon Nam),노충환(Noh Choong Hwan),박준택(Joon Taek Park),한경호(Kyoung Ho Han) 한국수산과학회 2001 한국수산과학회지 Vol.34 No.1
한국산 꺽지과 어류 3종에 대한 세포유전학적 기초 자료를 얻기 위하여 염색체 핵형, 적혈구 세포 및 핵의 크기와 DNA 함량을 조사하였다 꺽지 (Coreoperca herzi), 꺽저기 (C. kawamebari) 및 쏘가리 (Siniperca schezeri)의 핵형은 각각 2n=48 (4SM+44A,T), 2n=48(6SM+42A,T) 2n=48(4SM+44A,T) 이었으며, 암·수간 heteromorphic한 성염색체는 발견할 수 없었다. 쏘가리의 적혈구 세포 및 핵의 표면적과 체적은 다른 2종보다 작았다. DNA 함량은 적혈구 세포 크기에서 같은 경향을 보여, 쏘가리가 1.47 Pg/cell로 꺽지 (1.83 pg/cell) 및 꺽저기 (1.85pg/cell)보다 유의하게 작았다. Cytogenetic characteristics of three species in Centropomidae (Coreoperca herzi, C. kawamebari and Siniperca schezeri) were evaluated, based on karyologcial analysis, erythrocytic measurement and genome size estimation using flow cytometry. Modal chromosome number of three species was same as 2n=48. Karyotypes were 4SM+44A·T (NF=52) for Coreoperca herzi, 6SM+42 A·T (NF=52) for C. kawamebari and 4SM+44A·T (NF=52) for Siniperca schezeri. Heteromorphic sex chromosome was not found in both sexes of any species examined. Cellular and nuclear volumes of Siniperca schezeri were smaller than those of other two species. Average amounts of cellular DNA contents estimated by flow cytometry were well coincided with erythrocytic sizes. The estimated genome sizes were 1.83, 1.85 and 1.44 pg/cell for C. herzi, C. kawamebari and S. schezeri, respectively.
한국産 황어의 종묘생산에 관한 연구 1. 産卵習性 및 初期生活史
조재권,오성현,노병율,한경호,성기백,박준택 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-
강원도 양양군에 위치한 남대천과 전라남도 섬진강에 분포하고 있는 황어의 종료생산을 위한 기초자료로 産卵習性과 初期生活史에 관하여 관찰한 결과는 다음과 같다. 황어의 産卵期는 자연상태에서 3∼6月이고, 産卵은 흐르는 하천의 자갈 밑에 하였으며, 受精된 卵은 작은 자갈의 표면에 붙어있었다. 알의 크기는 2.70∼3.20㎜(평균 3.00㎜)로 油球는 없었다. 孵化는 평균 사육수온 10.60℃에서 受精 後 300시간부터 시작되었으며, 312시간만에 완료되었다. 孵化 直後의 仔魚는 전장 6.35∼6.87㎜(평균 10.67㎜)로 난황이 거의 흡수되어 後期仔魚期로 접어들며, 입과 항문이 열려있었다. 孵化 後 7∼9일째 後期仔魚는 전장 11.35∼12.30㎜(평균 11.65㎜)로 등지느러미가 생길 부분이 융기하기 시작하였다. 孵化 後 12∼13일째 개체는 전장 12.65∼13.15㎜(평균 12.80)로 이때부터 Daphnia sp.와 Brachionus plicatilis를 攝餌하였으며, 성장이 다소 빨라졌고, 脊索의 끝부분은 45°위로 굽어져 있었다. 孵化 後 43∼45일째의 개체는 전장이 19.55∼22.85㎜(평균 21.95㎜)로 모든 지느러미 줄기가 정수에 달하여 稚魚期로 이행하였다. 孵化 後 50∼52일째의 稚魚들은 전장이 21.54∼27.35㎜(평균 24.55㎜)로 몸의 형태, 체색 및 옆줄이 완전하게 형성되어 成魚에 닮아 있었다. The spawning behavior and early life history of sea rundace, Tribolodon hakonensis were studied. Spawning of T. hakonensis occurs enmasse on bottoms of stream with a spawning season of March to June. The eggs are attached to the under surface of the gravel. The eggs riped were demersal and adhesive, and their diameter were 2.70∼3.20㎜(mean 3.00㎜). Hatching was started at 300 hours after fertilization at mean water temperature 10.60℃. Newly-hatched larvae were 6.35∼6.87㎜ in total length(TL, Mean 6.65㎜), and mouth and anus were not yet opened. 4∼5 days old larvae transformed to postlarva stage and they were 10.25㎜∼11.15㎜ in TL (mean 10.67㎜). As yolk sac were nearly absorbed, mouth and anus were opened. In 7∼9 days after hatching, total length 11.35∼12.30㎜(mean 11.65㎜). The part of the fin-fold at dorsal fin became high. 12∼13 days old larvae were 12.65∼13.15㎜ in TL(mean 12.80㎜), and they fed Daphnia sp. and Brachionus plicatilis actively. In this time the growth rate slightly increased and tip of notocord was flesed on upward. Aggregate numbers of all fin rays were completed at over 19.55∼22.85㎜ in TL(43∼45 days after hatching), at which time the larvae reached the juvenile stage. 50∼52 days old larvae(21.54∼27.35㎜ in TL) were similar in body from, lateral line and color with adult.
점농어(Lateorabrax sp.)의 종묘생산에 관한연구 1. 稚魚期에 있어서 成長과 生存에 미치는 염분의 영향
박준택,한경호 麗水大學校 産業基術硏究所 1999 産業基術硏究所 論文集 Vol.8 No.-
점농어 稚魚(孵化後 150일째)의 염분 농도별 실험구(A : 30‰, B : 20‰, C : 10‰, D : 0‰)에서의 성장율과 생존율은 다음과 같다. 부화 150일루 稚魚들을 각각의 염분 농도에 수용하였을 때 수용 수 50일째까지는 고염분에서 성장이 다소 빨랐으나, 수용 후 60일째 부터는 담수와 저염분의 실험구에서 성장이 매우 양호하였다. 각 염분별 사육일수 (X)에 따른 전장(Y)과의 회귀직선식은 다음과 같다. 30‰ 실험구 : Y = 20.26X + 57.20 (r=0.9799), 20‰ 실험구 : Y = 19.74X + 57.82 (r=0.9825), 10‰ 실험구 : Y = 20.80X + 56.34 (r=0.9823), 담수(0‰) 실험구 : Y = 21.43X + 54.71 (r=0.9845). 염분 농도를 달리하여 사육하였을 때 生存率은 수용 초기에는 담수 실험구에서 生存率이 떨어졌으나, 수용 후 50일째부터는 오히려 담수 실험구에서 生存率이 높았으며, 수용 후 90일째부터는 生存率이 86.0∼91.0%로 실험구별로 큰 차이는 없는 것으로 나타났다. 각 실험구간의 기울기에 유의성 검정결과 담수(0‰) 실험구와 10‰, 20‰실험구 및 30‰실험구 사이에는 유의한 차이가 있었다. This study was conducted to compare the growth and survival rates of spotted sea bass, Lateorabrax sp., juveniles in different salinities (0‰, 10‰, 20‰, 30‰). The growth rate of sea bass juveniles were not observed significant difference in all test group until 50 days after rearing. After that, However rate of sea bass juveniles in low salinity was higher than the high salinity. The relationship between the days of rearing (X) and the total length (Y) of the fingerlings were as follows : 30‰ treatment group : Y = 20.26X + 57.20 (r=0.9799), 20‰ treatment group : Y = 19.74X + 57.82 (r=0.9825), 10‰ treatment group : Y = 20.80X + 56.34 (r=0.9823), 0‰ treatment group : Y = 21.43X + 54.71 (r=0.9845). The slopes of regression line estimated from 0‰, 10‰ and 20‰groups were significantly different from that of 30‰ group. Survival rate of sea bass juveniles was fall down slightly at low salinitly () until 50 days after rearing. But significant difference of survival rate was observed in all test group from 90 day after rearing to the end of experimental period.