Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Effects of Dietary Nucleotide Supplementation on the Growth Performance, Feed Utilization, Hematological Parameters and Innate Immunity in Red Seabream Pagrus major

사료 내 Nucleotides 첨가가 참돔P(agrus major)의 성장, 사료효율, 혈액성상 및 비특이적 면역반응에 미치는 영향

  • Song, Jin-Woo (Department of Marine Life Sciences, Jeju National University) ;
  • Lee, Kyeong-Jun (Department of Marine Life Sciences, Jeju National University)
  • 송진우 (제주대학교 해양생명과학과) ;
  • 이경준 (제주대학교 해양생명과학과)
  • Received : 2013.10.14
  • Accepted : 2013.12.17
  • Published : 2013.12.31
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Abstract

Two studies were conducted to investigate the effects of dietary nucleotides (NT) on the growth performance, hematological parameters, and innate immune responses of red seabream Pagrus major. In Expt I, six experimental diets were formulated: a control, four that contained each NT at a level of 0.15% (inosine monophosphate, IMP; adenosine monophosphate, AMP; guanosine monophosphate, GMP; and uridine monophosphate, UMP), and one with a 1:1:1:1 mixture of NTs (IMP, AMP, GMP, and UMP). In Expt II, five experimental diets were formulated that contained 0, 0.1, 0.2, 0.4, and 1.0% IMP (commercial product). Triplicate groups of juvenile (initial body weight 33.1 g) and growing (initial body weight 120 g) red seabream were fed one of the experimental diets to apparent satiation for 8 weeks in Expt I and 12 weeks in Expt II. In Expt I, fish fed diets with NT had higher growth performance than the control group. The nitroblue tetrazolium and lysozyme activities were higher in fish fed the mixed-NT diet, and lowest in the control group. In Expt II, the final body weight and feed utilization of fish fed the 0.1% IMP diet were significantly higher than those of fish fed the control or 1.0% IMP diets. Diet palatability was improved significantly when 0.1% IMP was added. The lysozyme activity was higher in fish fed diets with 0.4-1.0% than in the control group. These results suggest that supplementation of 0.15% IMP and Mixed-NTs in diet can enhance the growth and immune responses in juvenile red seabream. The optimum IMP level appears to be 0.2% in practical feed formulation for growing red seabream.

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References

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