Jong-Kuk Choi

Gyeongsang National University

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U-Cheol Jeong

Gyeongsang National University

Seok-Joong Kang

Gyeongsang National University

Feng Jin

Weifang Medical University

Jong-Cheol Han

National Fisheries Research and Development Institute

A Anisuzzaman

Bangladesh Agricultural University

Md Anisuzzaman

Noakhali Science and Technology University

Feng Jin

Jilin Agricultural University

Byong-Dae Choi

Yu Hak Sun

Pusan National University

Byeong-Dae Choi

Gyeongsang National University

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Gyeongsang National University

Korea Fisheries Resources Agency

Pusan National University

Bangladesh Agricultural University

Beijing Forestry University

Chittagong Medical College

Korea Institute of Ocean Science and Technology

Korea University of Science and Technology

Pukyong National University

Universities Space Research Association

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マナマコ Apostichopus japonicus幼生の成長率と生残率に対する餌中の鞭毛菌類 Schizochytrium微細藻類の効果

水産増殖 (2016)

A Anisuzzaman Feng Jin Jong-Kuk Choi Jeong U‐Cheol Yu Hak Sun

Apostichopus japonicus

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Fecal Solid Feed from the Recirculating Aquaculture System of the Renewable Sea Cucumber Apostichopus japonicus

Korean Journal of Fisheries and Aquatic Sciences (2016)

U-Cheol Jeong Feng Jin Jong-Kuk Choi Md Anisuzzaman Byeong-Dae Choi

Pollution caused by fecal solids released from recirculating aquaculture systems (RAS) is a growing global concern requiring immediate attention. Thus, this study investigated the physicochemical characteristics of fecal solid feed from RASs used for eel and rainbow trout farming. The concentrations of proteins, lipids, crude ash, and moisture in eel fecal solids were 10.9%, 1.2%, 85.8%, and 72.2%, respectively, while those in rainbow trout fecal solid feed were 20.5%, 3.2%, 70.9%, and 87.0%, respectively. The control group was fed a mixture of sea cucumber and dried sea mud. The protein digestibilities of eel and rainbow trout fecal solids were 25.43% and 23.96%, respectively, while the respective lipid digestibilities were 35.62% and 36.80%, respectively.

Apostichopus japonicus

10.5657/kfas.2016.0330

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Han川河口,韓国におけるGOCIと現場データを用いた懸濁堆積物濃度の長期モニタリング【Powered by NICT】

IEEE Conference Proceedings (2016)

Hwang Deuk-Jae Jong-Kuk Choi Eom Jinah Joo‐Hyung Ryu Woo Han-Jun

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Effects of different algae in diet on growth and interleukin (IL)-10 production of juvenile sea cucumber Apostichopus japonicus

Fisheries and aquatic sciences (2017)

A Anisuzzaman U-Cheol Jeong Feng Jin Jong-Kuk Choi Kamrunnahar Kabery

The experiment was conducted to investigate the effects of different algae in diet on growth, survival, and interleukin-10 productions of sea cucumber. At first, a 9-week feeding trail was conducted to evaluate the growth performance and survival of the sea cucumber fed one of the six experimental diets containing ST (Sargassum thunbergii), UL (Ulva lactuca), UP (Undaria pinnatifida), LJ (Laminaria japonica), SS (Schizochytrium sp.), and NO (Nannochloropsis oculata) in a recirculating aquaculture system. The result showed that survival was not significantly different among the dietary treatments, and the specific growth rate (SGR) of sea cucumber fed the UL diet (1.58% d−1) was significantly higher than that of sea cucumber fed the other diets (P < 0.05), except for the LJ and NO diets. Secondly, interleukin (IL)-10 gene expression was determined where mice splenocytes were stimulated with 10 μg ml−1 of sea cucumber extracts for 2 h. The result showed that IL-10 gene expression levels were significantly increased in UL, LJ, and NO diets fed sea cucumber extracts compared to other experimental diets. The results suggest that dietary inclusion with Ulva lactuca, Laminaria japonica, and Nannochloropsis oculata algae may improve the growth of juvenile sea cucumber and could upregulate IL-10 gene expression in mice splenocytes. Such detailed information could be helpful in further development of more appropriate diets for sea cucumber culture.

Apostichopus japonicus

Ulva lactuca

10.1186/s41240-017-0069-5

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Growth and Survival Rate of Sea Cucumber Apostichopus japonicas Feeding by Fermented Fecal Solid Diets from Fish Farm

한국수산과학회 양식분과 학술대회 (2014)

Feng Jin U-Cheol Jeong Ga-Hyun Kang Jong-Kuk Choi Byeong-Dae Choi

Apostichopus japonicus

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A Laboratory-scale Recirculating Aquaculture System for Sea Cucumber Apostichopus japonicus

Korean Journal of Fisheries and Aquatic Sciences (2016)

U-Cheol Jeong Feng Jin Jong-Kuk Choi Jong-Cheol Han Byong-Dae Choi

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.

Apostichopus japonicus

10.5657/kfas.2016.0343

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Effect of High Water Temperature on the Growth and Lipid Compositions of the Sea Cucumber Apostichopus japonicus

Korean Journal of Fisheries and Aquatic Sciences (2019)

U-Cheol Jeong Md Anisuzzaman Feng Jin Jong-Kuk Choi Jong-Cheol Han

Apostichopus japonicus

10.5657/kfas.2019.0400

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Comparison of Fatty Acid Composition of Wild and Cultured Sea Cucumber Apostichopus japonicus

Korean Journal of Fisheries and Aquatic Sciences (2016)

Feng Jin Md Anisuzzaman U-Cheol Jeong Jong-Kuk Choi Hak Sun Yu

This study compared the fatty acid composition of wild and cultured specimens of the sea cucumber Apostichopus japonicus. We extracted total lipids from the specimens and determined their fatty acid compositions through capillary gas chromatography, resulting in the identification of 53 fatty acids. We found that wild sea cucumbers were rich in palmitoleic (C16:1n-7) and eicosapentaenoic acid (C20:5n-3), whereas cultured specimens were rich in eicosenoic (C20:1n-9) and arachidonic acid (C20:4n-6). In both types of sea cucumbers, the highest percentage of polyunsaturated fatty acids (PUFA) consisted of polar lipids (PL), followed by total lipids (TL) and neutral lipids (NL). Cultured sea cucumbers contained a higher percentage of total lipids (TL) than wild sea cucumbers did, whereas there was no significant difference between the two groups in the percentages of neutral (NL) and polar lipids (PL).

Apostichopus japonicus

10.5657/kfas.2016.0474

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고수온에서의 해삼(Apostichopus japonicus) 성장과 체지방 조성

한국수산과학회지 (2019)

U-Cheol Jeong A Anisuzzaman Feng Jin Jong-Kuk Choi Jong-Cheol Han

The optimum growth temperature of sea cucumber is 18°C, above 20°C, the appetite declines and the digestive tract is atrophied. At 25°C or more, it is known that the digestive tract is degenerated as growth is stopped by minimizing metabolic activity. Because of these physiological and ecological characteristics, the growth period of sea cucumber Apostichopus japonicus is relatively short in the natural environment of Korea where four seasons are clear. Therefore, maintenance of water temperature in sea cucumber culture is very important. This experiment was conducted to investigate the growth and lipid compositions of sea cucumbers at high temperature. Results showed that the growth and survival rates of sea cucumber were not significantly different until 26°C (P>0.01). The fatty acid compositions of total lipid of sea cucumber tended to increase with saturated fatty acid content and decrease with n-3 fatty acid content at higher water temperature.

Apostichopus japonicus

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