Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Optimum Feeding Frequency of Extruded Pellet for the Growth of Juvenile Flounder, Paralichthys olivaceus During the Summer Season

여름철에 넙치 치어 배합사료의 적정 공급횟수

  • Kim Kyong-Min (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Kim Kyoung-Duck (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Choi Se-Min (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Kim Kang-Woong (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Kang Yong Jin (Aquafeed Research Center, National Fisheries Research & Development Institute)
  • 김경민 (국립수산과학원 양식사료연구센터) ;
  • 김경덕 (국립수산과학원 양식사료연구센터) ;
  • 최세민 (국립수산과학원 양식사료연구센터) ;
  • 김강웅 (국립수산과학원 양식사료연구센터) ;
  • 강용진 (국립수산과학원 양식사료연구센터)
  • Published : 2005.11.01
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Abstract

A 6-week feeding trial was conducted to determine optimum feeding frequency for growth of juvenile flounder Paralichthys. olivaceus during the summer season. Triplicate groups of fish (initial mean weight 3.7 g) were fed a extruded pellet with 5 feeding frequencies (one meal every 2 days, one meal a day, two meals a day, three meals a day and four meals a day) at $24.0\pm0.50^{\circ}C$ (mean$\pm$SD). Survival of fish fed one meal every 2 days was significantly (P<0.05) lower than that of the other groups. Weight gain, specific growth rate and daily feed intake increased with increasing feeding frequency (P<0.05). However, no significant differences were observed in weight gain, specific growth rate and daily feed intake of fish fed among two, three and four meals a day. feed efficiency and protein efficiency ratio were not affected by feeding frequency. Whole body contents of moisture, crude protein, crude lipid and ash were not significantly affected by feeding frequency. These results indicate that optimum feeding frequency is two meals a day for the optimum growth of juvenile flounder grown from 3.7 to 19.0 g under the experimental conditions.

본 연구는 치어기 넙치의 여름철 적정 사료공급 횟수를 조사하기 위해 평균무게 3.7g의 실험어를 300${\iota}$ 원형수조에 각 수조당 80마리씩 3반복으로 무작위 배치하여 사료공급 횟수를 달리하여 6주간 사육하였다. 사료공급 횟수는 2일 1회(09:00), 1일 1회(09:00), 1일 2회(09:00, 18:00), 1일 3회(09:00, 13:00, 18:00) 및 1일 4회(09:00, 12:00, 15:00, 18:00)로 설정하였으며, 매회 실험어가 먹을 때까지 만복공급 하였다. 생존율은 2일 1회 사료공급구가 가장 낮게 나타났으며, 1일 1회 이상의 사료공급구간에서는 유의적인 차이가 나타나지 않았다. 증체율 및 일일사료 섭취율은 사료공급횟수가 증가함에 따라서 증가하였지만, 1일 2회 이상 사료를 공급한 실험구들 간에는 유의한 차이가 없었다. 사료효율 및 단백질 전환효율은 사료공급횟수에 유의한 영향을 받지 않아 모든 실험구간에 차이가 없었다. 사육실험 종료 후, 전어체의 수분, 단백질, 지방 및 회분함량은 모든 실험구에서 유의적인 차이가 나타나지 않았다. 이상의 결과로 볼 때, 3.7${\~}$19.0g 넙치 치어 시기의 여름철(수온 $24^{\circ}C$) 배합사료의 적정공급 횟수는 사육관리 시간 및 비용 등 경제적인 측면을 고려하였을 때 1일 2회일 것으로 사료되며, 이때 사료섭취율은 $2.63{\~}2.78\%$가 적당할 것으로 판단된다.

Keywords

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