title: Effects of Feeding Rate and Water Temperature on Growth and Body Composition of Juvenile Korean Rockfish, Sebastes schlegeli (Hilgendorf 1880).
abstract: Three feeding trials were conducted to evaluate the effects of feeding rate and water temperature on growth and body composition of juvenile Korean rockfish, Sebastes schlegeli rearing at 3 different water temperatures. A total of 270 fish (each experiment) individual body weight (BW) averaging 16±0.3 g (mean±SD) were fed a commercial diet for 4 wk at 16°C, 20°C, and 24°C. At each temperature, triplicate tanks were assigned to one of 6 feeding rates: 1.5%, 2.5%, 2.8%, 3.1%, 3.4%, and satiation (3.7% BW/d) at 16°C, 1.9%, 2.9%, 3.2%, 3.5%, 3.8% and satiation (4.1% BW/d) at 20°C and 1.7%, 2.7%, 3.0%, 3.3%, 3.6%, and satiation (3.9% BW/d) at 24°C water temperature. Weight gains of fish in satiation and 3.4% groups at 16°C, in satiation and 3.8% groups at 20°C and in satiation and 3.6% groups at 24°C were significantly higher than those of fish in the other treatments (p<0.05). A broken line regression analysis of weight gain indicated that optimum feeding rates of juvenile Korean rockfish were 3.41% at 16°C, 3.75% at 20°C and 3.34% at 24°C water temperature. Results of the present study indicate that the optimum feeding rate could be >3.1% but <3.41% at 16°C, >3.5% but <3.75% at 20°C and >3.0% but <3.34% at 24°C. As we expected results suggest that fish performed better at 20°C than 16°C or 24°C water temperature and the optimum feeding rate could be 3.1% BW/d to 3.7% BW/d in 16 g of juvenile Korean rockfish.
authors: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Lab 9134B/C-21, Pukyong National University, Busan 608-737, Korea ; Bangladesh Civil Service Cadre, Planning Commission, Ministry of Planning, Dhaka, Bangladesh .
authors: Rahman
authors: R
authors: Md Mizanur
authors: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Lab 9134B/C-21, Pukyong National University, Busan 608-737, Korea.
authors: Hyeonho
authors: H
authors: Yun
authors: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Lab 9134B/C-21, Pukyong National University, Busan 608-737, Korea.
authors: M
authors: M
authors: Moniruzzaman
authors: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Lab 9134B/C-21, Pukyong National University, Busan 608-737, Korea.
authors: F
authors: F
authors: Ferreira
authors: Aquafeed Research Center, East Sea Fisheries Research Institute, National Fisheries Research and Development Institute (NFRDI), Pohang 791-802, Korea .
authors: Kang-Woong
authors: KW
authors: Kim
authors: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Lab 9134B/C-21, Pukyong National University, Busan 608-737, Korea.
authors: Sungchul C
authors: SC
authors: Bai
keywords: Feeding Rate; Growth Performance; Juvenile Korean Rockfish; Sebastes schlegeli; Water Temperature