Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effect of Feeding Frequency of Extruded Pellet on Growth and Body Composition of Juvenile Flounder, Paralichthys olivaceus During the Winter Season

겨울철에 부상사료 공급횟수가 넙치 치어의 성장과 체성분에 미치는 효과

  • Kim Gun-Up (Gangwon Province Marine Culture Experimental Station) ;
  • Jang Hyun-Seok (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • Seo Joo-Young (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • Lee Sang-Min (Faculty of Marine Bioscience and Technology, Kangnung National University)
  • 김근업 (강원도 수산 양식시험장) ;
  • 장현석 (강릉대학교 해양생명공학부) ;
  • 서주영 (강릉대학교 해양생명공학부) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Published : 2005.02.01
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Abstract

A feeding trial of two feeding rate (satiation and $80\%$ satiation) $\times$ four feeding frequency (three meals a day, two meals a day, one meal a day and one meal every two days) factorial design with three replications was carried out to investigate the optimum feeding frequency and rate for growth of flounder during the winter season. Juvenile flounder averaging 45 g were fed a extruded pellet for 60 days. Weight gain was affected by both feeding frequency (P<0.001) and feeding rate (P<0.01). The best weight gain obtained from fish fed two meals a day with satiation was not different from that of fish fed three meals a day with satiation and $80\%$ satiation. Feed efficiency and protein efficiency ratio of fish fed the diet three times daily were the highest among groups, but not different to other groups of fish except for one meal every two days with satiation and $80\%$ satiation feeding. Daily feed intake was affected by both feeding frequency and feeding rate (P<0.001), these values of fish fed two and three meals a day with satiation were the highest among the groups. Moisture, crude protein, crude lipid and ash contents of fish were not affected by both feeding frequency and feeding rate (P>0.05). The results of this study indicate that the optimum feeding frequency for the growth of juvenile flounder grown from 45 g to 53 g is two meals a day with satiation feeding during the winter season.

본 연구는 겨울철 넙치 사육시 부상 배합사료의 적정 공급횟수와 공급률을 조사하기 위해 평균 체중 45.0 g의 넙치를 각 수조마다 20마리씩 3반복으로 수용하여 60일간 사육하였다. 사료 공급횟수는 1일 3회, 1일 2회, 1일 1회 및 2일 1회로 설정하였으며 사료 공급량은 만복 및 만복의 $80\%$로 설정하였다. 생존율은 모든 실험구에서 $96\%$이상이었으며, 증중량은 1일 2회 만복 공급구가 1일 3회 공급구와 통계적인 차이는 없었지만 가장 높았고. 2일 1회 제한 공급구가 가장 낮은 결과를 보였다. (P<0.05). 그리고 동일한 공급횟수에서 만복 공급구가 제한 공급구보다 높은 성장을 보였다. 일일사료섭취율은 만복 공급구와 제한 공급구 모두 공급횟수가 증가할수록 증가하다가 1일 2회 공급구 이상에서는 유의한 차이가 없었다. 사료효율과 단백질효율은 1일 3회 제한 공급구가 가장 높았고 2일 1회 제한 공급구가 낮은 값을 보였으며(P<0.05), 나머지 실험구들 사이에는 유의한 차이를 보이지 않았다. 사육 실험 종료시 전어체의 수분, 단백질, 지질 및 회분함량은 모든 실험구간에 유의한 차이가 없었다. 이상의 결과로부터, 평균체중 45-53 g의 넙치치어를 겨울철에 사육할 때는 부상배합사료를 1일 2회 만복으로 공급하는 것이 바람직 할 것이라 판단된다.

Keywords

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