Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Identification of feeding Stimulants to Improve Efficiency of Diet for flatfish

사료 효율 개선을 위한 넙치 섭식촉진물질의 검색

  • Choi Young Joon (Division of Marine Bioscience·Institute of Marine Industry, Gyeongsang National University) ;
  • Lee Nam Joo (Division of Marine Bioscience·Institute of Marine Industry, Gyeongsang National University) ;
  • Cho Young Je (Faculty of Food Science and Biotechnology, Food Science and Technology Major, Pukyong National University) ;
  • Bai Sung Chul (Department of Aquaculture, Pukyong National University)
  • 최영준 (경상대학교 해양생물이용학부 해양산업연구소) ;
  • 이남주 (경상대학교 해양생물이용학부·해양산업연구소) ;
  • 조영제 (부경대학교 식품생명공학부) ;
  • 배승철 (부경대학교 양식학과)
  • Published : 2002.03.01
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Abstract

In order to identify the feeding stimulants for flatfish, the feeding tests were conducted using some diets added the amino acids, nucleotides, betaine and TU and acid hydrolysates to basal diet formula, respectively, The feeding stimulant activities and synergistic effects of those compounds were evaluated by a bioassay method. The KH, a kind of acid hydrolysate, possessed a remarkable feeding stimulant activity. It's stimulant activities were increased up to the concentration of $1.05\%$ (w/v), and were independent of pH. The formulation of KH and glycine had a most synergistic effect, The feeding rate of diet with feeding stimulation was 1,4 fold than that of diet without one. The costs for optimum formulation of feeding stimulants were cheaper than some additives in diets. It suggest that the results can practically used in preparation of diet containing feeding stimulant effects for flatfish.

우리나라 해산어 양식의 주요 대상 어종인 넙치의 섭식 촉진 물질을 확인하기 위하여 몇 가지 아미노산, 핵산관련물질, 염기성 물질 및 산가수분해물의 섭식촉진 효과를 수조 실험을 통해 검토하였다. Glycine, IMP, GMP 및 betaine은 다소의 섭식 촉진 효과가 인정되었으며 천연 단백질 자원의 산 가수분해물인 KH가 가장 우수한 섭식촉진 효과를 보였다. KH는 사료 중량에 대하여 $1.05\%$ (w/w)까지 섭식촉진 효과가 증가하였으나 그 이상의 농도에서는 효과가 거의 일정하였다. 산 가수분해물의 pH는 섭식촉진에 영향을 미치지 않았고, 물질의 흔합에 따른 상승효과는 KH와 glycine의 조합이 가장 우수하였다. 대조군 사료는 총 급이량의 $58.2\%$를 섭취한 반면 섭식촉진 사료는 $83.3\%$를 섭취하여 섭식촉진물질의 첨가는 섭식량의 증가 뿐 아니라 사료 효율의 개선에 현저히 기여하였다. 그리고 섭식촉진 물질의 조합에 따른 단가 상승은 기본사료 가격의 $0.05\%$ 이내에 불과하여 경제성이 충분하며 실용화가 가능한 것으로 예상하였다. 한편 본 연구 결과의 적용을 확대하기 위해서는 장차 넙치 성어에 대한 연구도 필요할 것으로 보인다.

Keywords

References

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