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정우철,이정태,강석중,최병대,Jeong, U-Cheol,Lee, Jeong-Tae,Palmos, Grace N,Kang, Seok-Joong,Choi, Byeong-Dae 한국생명과학회 2007 생명과학회지 Vol.17 No.9
Effects of muscle fluid concentrates from Styela clava on fish diets were investigated in rainbow trout(Oncorhynchus mykiss). Fish were fed on one of the isonitrogenous(48%) and isolipic(20%) feed containing 5 to 20% of muscle fluid concentrates for 8 weeks. Hematological parameters such as hemoglobin, hematocrit, albumin, glucose, total bililubin, triglyceride and glutamic pyruvate transaminase of the rainbow trout which were fed on the diets varied, but no specific trend became apparent. However, glutamic oxaloacetic transaminase value was significantly higher than that of normal fishes. Therefore, concentrated ascidian fluid which is normally discarded, can be combined with commercial diets for the normal growth of rainbow trout.
소형 순환여과양식시스템에서 어린 해삼(Apostichopus japonicus) 사육
정우철 ( U Cheol Jeong ),( Feng Jin ),최종국 ( Jong Kuk Choi ),한종철 ( Jong Cheol Han ),최병대 ( Byong Dae Choi ),강석중 ( Seok Joong Kang ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.3
The sea cucumber Apostichopus japonicus is a commercially valuable aquaculture species in Korea. Aquaculture species require specific nursery culture conditions to increase survival and growth rates. Sea cucumbers hibernate during the high temperatures of summer and during the low temperatures of winter, and suboptimal temperature conditions decrease sea cucumber growth and survival rates. The natural South Korean environment is very unfavorable for culturing sea cucumber; therefore, developing a recirculating aquaculture system (RAS) capable of breeding and growing sea cucumber year-round is necessary. The aim of this study was to investigate growth performance of juvenile sea cucumber in a RAS. Growth and survival rates of juvenile sea cucumber were high during our 24-week experiment. Sea cucumber survival rates were 87.8-93.3%, and specific growth rates were 0.4689-0.7846.
물벼룩(Moina macrocopa) 급여가 조피볼락(Sebastes schlegeli) 자어의 성장에 미치는 영향
정우철 ( U-cheol Jeong ),( Feng Jin ),최종국 ( Jong- Kuk Choi ),이정태 ( Jeong-tae Lee ),최병대 ( Byeong-dae Choi ),강석중 ( Seok-joong Kang ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.2
Several our studies have focused recently on the mass production of the freshwater Cladoceran Moina macrocopa which can substitute Artemia nauplii for the culture of larval marin fish. A 6 weeks experiment was conducted to investigate the effects of enrichment on the fatty acid composition of Moina macrocopa through feeding Schizo-chytrium sp. containing highly unsaturated fatty acids and to study the impacts of n-3-HUFA enriched Moina on improving survival rate and fatty acid compostion of larval rockfish Sebastes schlegeli. After feeding for 6 weeks, the Moina-fed fry resulted in a higher survival rate of 99.2% compared to the Artemia-fed fry 12.8%. In addition, the Moina-fed fry had the fast growth rate 45.6mm compare to the Artemia-fed fry 25.7 mm at the end of the experiment. The Moina-fed fry showed significantly higher level of 16.47% DHA than their Artemia-fed fry counterparts of the level of 3.97% with respect to DHA. PL, the cell membrane components in living food organisms, constituted 63.8% of the Moina, which was significantly higher than in the 40.1% of the Artemia. The present study indicate that Moina macrocopa can be used as Artemia substitute and improving the survival rate rockfish larvae through enchriment Schizochytrium sp.