Kim, Sung-Sam
Aquafeed R&D Center of CJ CheilJedang

Published : 2 Documents

Found 2 Documents

Optimum Feeding Rate for the Sub-adult Olive Flounder, Paralichthys olivaceus, Fed Practical Extruded Pellets at Optimum Water Temperature Shin, Seung-Jun; Shin, Seung-Jun; Bai, Sungchul C.; Bai, Sungchul C.; Lee, Kyeong-Jun; Lee, Kyeong-Jun; Kim, Jeong-Dae; Kim, Jeong-Dae; Kim, Sung-Sam
Aquacultura Indonesiana Vol 19, No 2 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (617.339 KB) | DOI: 10.21534/ai.v19i2.122


We investigated the effects of feeding rate on the growth, blood components, and histology of the growing olive flounder (Paralichthys olivaceus). We determined the optimum feeding rate (initial fish mean weight = 525.3 ± 7.12 g) at the optimum water temperature. Two replicate groups of fish were fed a commercial diet at rates of 0%, 0.2%, 0.4%, 0.6%, and 0.8% (i.e., to satiation) of body weight (BW) per day. The feeding trial was conducted using a flow-through system, with ten of 1.2-metric-ton aquaria receiving filtered seawater between 20.5 and 24.5°C, for 3 weeks. Weight gain (WG) and specific growth rate (SGR) were significantly greater in fish fed with satiation at 0.8% BW/day compared to fish fed at 0.2% BW/day, and with unfed fish. These parameters were negative, and significantly lower, in the starved fish compared to the fish fed the experimental diet, for all feeding rates. There were no significant differences in WG and SGR among fish fed at 0.2%, 0.4%, and 0.6% BW/day, and among those fed at 0.4%, 0.6% and 0.8% of BW/day. The histological changes in tissues were not significant in the hepatopancreas, kidney, or anterior intestine of fish fed at 0%, 0.4%, and 0.8% of BW/day. Broken-line regression analysis based on weight gain demonstrated that the optimum feeding rate for an olive flounder weighing 525 g was 0.70% BW/day at optimum water temperature.
Overview on the Development of Aquaculture and Aquafeed Production in Korea Kim, Sung-Sam; Kim, Jeong Dae
Aquacultura Indonesiana Vol 20, No 1 (2019)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.572 KB) | DOI: 10.21534/ai.v19i2.128


Total landings of capture and culture fisheries in Korea increased from 1,073,000 metric tons (MT) in 1971 to 3,743,000 MT in 2017 mainly due to the development in marine aquaculture practices. During last four decades, marine aquaculture production in Korea showed around 5-fold increase from 491,000 MT in 1977 to 2,310,000 MT in 2017 recording the value of 2.9 billion USD. Last year, the main production was derived from seaweed (1,755,630 MT), while the aquatic animal production was made from shellfish (428,160 MT), fish (86,400 MT), crustacean (mainly shrimp of 5,100 MT) and others (34,530 MT). Inland aquaculture is based on fish farming with the production of around 25,000 MT. Either trash fish or moist pellet based on the raw fish is still being fed to marine culture fish, which is the main obstacle for developing the farming. In 2017, around 450,000 MT of trash fish with 87,980 MT of extruded pellets were employed to produce 86,399 MT of marine fish.