Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effect of Feeding Frequency of Extruded Diets Containing Different Macro-nutrient Levels on Apparent Nutrient Digestibility in Grower Flounder Paralichthys olivaceus

영양소 함량이 다른 부상 배합사료의 공급횟수가 육성기 넙치의 영양소 소화율에 미치는 영향

  • Seo, Joo-Young (Faculty of Marine Bioscience and Technology, Kangnung Notional University) ;
  • Choi, Kyoung-Hyun (Faculty of Marine Bioscience and Technology, Kangnung Notional University) ;
  • Choi, Jin (Faculty of Marine Bioscience and Technology, Kangnung Notional University) ;
  • Lee, Sang-Min (Faculty of Marine Bioscience and Technology, Kangnung Notional University)
  • 서주영 (강릉대학교 해양생명공학부) ;
  • 최경현 (강릉대학교 해양생명공학부) ;
  • 최진 (강릉대학교 해양생명공학부) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Published : 2005.08.25
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Abstract

Two feeding trials were carried out to investigate apparent nutrient digestibility of flounder fed experimental diets containing different levels of macro-nutrients by satiation feeding rate (Exp-1) and feeding frequency (Exp-2). Triplicate groups of fish averaging 280 g were fed three experimental diets which contained different levels of carbohydrate, protein and lipid by two feeding regimes (satiation and 80% satiation) and four feeding frequencies (three meals a day, two meals a day, one meal a day and one meal every two days). Feces were collected using a fecal collection column attached to fish rearing tanks for 6 weeks. Apparent digestibilities of dry matter, protein, lipid, energy and carbohydrate were not affected by feeding satiation rate in Exp-1. Apparent protein digestibility was not affected by feeding frequency, whereas affected by dietary composition in Exp-2. Apparent protein digestibility of fish fed a high-protein diet showed a tendency to become higher compared to that of fish fed high-carbohydrate diet and high-lipid diet at the same feeding frequency. Apparent lipid digestibility was not affected by dietary composition, however, affected by feeding frequency. Apparent digestibilities of energy and carbohydrate were affected by both dietary composition and feeding frequency. Apparent digestibities of energy and carbohydrate in fish fed the high-protein diet showed a tendency to become higher compared to that of fish fed the high-carbohydrate diet and high-lipid diet at the same feeding frequency. Apparent digestibities of energy and carbohydrate tended to decrease with increasing of feeding frequency at the same dietary composition.

평균체중 280 g의 넙치를 대상으로 탄수화물, 단백질 및 지질 함량이 다른 3종류의 EP사료(HC, HP및 HL)를 제조하여, 사료 공급율과 공급휫수를 달리하여 영양소 소화율을 조사하였다. 사료의 공급율에 따른 실험(실험 1)은 파 사료별로 1일 1회 만복 공급구와 만복의 80% 공급구로 설정하였다. 사료 공급횟수에 따른 실험(실험 2)에서는 사료의 공급휫수를 각 사료마다 2일 1회, 1일 1회, 1일 2회 및 1일 3회로 설정하였다. 사료 공급율을 달리한 실험 1에서 넙치의 건물, 단백질, 지질, 에너지 및 NFE 소화율은 사료 조성과 공급율에 영향을 받지 않았다. (P>0.05).사료 공급횟수를 달리한 실험 2리 건물 소화율은 동일한 공급횟수에서 HP 공급구가 HC와 HL 공급구와 비교하여 높은 소화율을 보였다. 단백질 소화율은 사료 조성에 영향을 받아 HP 공급구가 수치상으로 높은 값을 보였으나 실험구간에 유의차는 없었다(P>0.05).지질 소화율은 사료 공급횟수에 영향을 받아 1일 2회와 3회 공급구에서 감소하는 경향을 보였다. NFE 소화율은 사료 조성과 공급횟수에 경향을 받았으며, 동일한 공급횟수에서 1일 3회 공급구를 제외한 실험 구에서 HP 공급구의 소화율이 높은 경향을 보였다. 그리고 동일한 사료에서는 2일 1회에서 1일 2회까지 공급횟수가 증가하면서 NFE 소화율이 낮아지는 경향을 보였다. 에너지 소화율은 동일한 공급 횟수에서 1일 1회 공급구를 제외하고 HP를 공급한 실험구가 다른 실험구에 비해 높았고, HP 공급구들 간에는 사료공급횟수에 영향을 받지 않았다.

Keywords

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