Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Optimum Feeding Rate for Growing Olive Flounder (317 g) Paralichthys olivaceus Fed Practical Extruded Pellets at Optimum Water Temperature (21-24℃)

적수온(21-24℃)에서 사육한 성장기(317 g) 넙치(Paralichthys olivaceus)의 배합사료 적정 공급률

  • Oh, Dae-Han (Department of Marine Life Science, Jeju National University) ;
  • Kim, Sung-Sam (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Kim, Kang-Woong (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Kim, Kyoung-Duck (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Lee, Bong-Joo (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Han, Hyon-Sob (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Kim, Jae-Won (Department of Marine Life-Science, Gangwon Provincial college) ;
  • Okorie, Okorie Eme (Department of Marine Bio-Materials, Pukyong National University) ;
  • Bai, Sungchul C. (Department of Marine Bio-Materials, Pukyong National University) ;
  • Lee, Kyeong-Jun (Department of Marine Life Science, Jeju National University)
  • 오대한 (제주대학교 해양생명과학과) ;
  • 김성삼 (국립수산과학원 사료연구센터) ;
  • 김강웅 (국립수산과학원 사료연구센터) ;
  • 김경덕 (국립수산과학원 사료연구센터) ;
  • 이봉주 (국립수산과학원 사료연구센터) ;
  • 한현섭 (국립수산과학원 사료연구센터) ;
  • 김재원 (강원도립대학교 해양생명과학과) ;
  • 박희정 (부경대학교 해양바이오신소재학과) ;
  • 배승철 (부경대학교 해양바이오신소재학과) ;
  • 이경준 (제주대학교 해양생명과학과)
  • Received : 2014.07.25
  • Accepted : 2014.08.25
  • Published : 2014.08.31
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Abstract

We investigated the effects of feeding rate on the growth performance, blood components, and histology of growing olive flounder Paralichthys olivaceus. Optimum feeding rate (initial fish mean weight : $316.7{\pm}6.18g$) was determined under the optimum water temperature. Two replicated groups of fish were fed a commercial diet at rates of 0%, 0.4%, 0.6%, and 0.8% of body weight (BW) per day, and to satiation. Feeding trial was conducted using a flow-through system with 10 1.2-metric ton aquaria receiving filtered seawater at $21-24^{\circ}C$ for 3 weeks. Weight gain (WG) and specific growth rate (SGR) were significantly higher in fish fed to satiation (1.0% BW/day) than in those in other treatments. These parameters were negative and significantly lower in the starved fish than in fish fed the experimental diet at all feeding rates. There were no significant differences in WG and SGR among fish fed at 0.4%, 0.6%, and 0.8% BW/day. Hematocrit and hemoglobin in fish fed to satiation were significantly lower than those in other treatments. Histological changes of fish fed at 0.6% BW/day indicated that this group was in the best condition; differences were not found in tissues of fish fed at 0%, 0.6% and 1.0% BW/day. Broken-line regression analysis of weight gain showed that the optimum feeding rate of olive flounder weighing 317 g was 0.99% BW per day at the optimum water temperature.

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References

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  1. Comparison of Extruded and Moist Pellets for Whole-body Proximate Composition and Growth Performance of Olive Flounder Paralichthys olivaceus vol.47, pp.6, 2014, https://doi.org/10.5657/KFAS.2014.0810
  2. Optimum Feeding Rate for Sub-adult Olive Flounder (384 g) Paralichthys olivaceus Fed Practical Extruded Pellets at Optimum Water Temperatures (20-24.5℃) vol.47, pp.5, 2014, https://doi.org/10.5657/KFAS.2014.0582