Journal of Fisheries and Marine Sciences Education (수산해양교육연구)

The Korean Society for Fisheries and Marine Sciences Education (한국수산해양교육학회)
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Comparison of Growth and Water Quality in Juvenile Japanese Eel, Anguilla Japonica Fed Commercial Extruded Pellet and Paste Type Diets

시판 뱀장어용 부상사료 및 반죽사료에 대한 치어기 뱀장어(Anguilla japonica) 성장 및 사육수질 비교

  • 김성원 (국립수산과학원 남부양식연구소) ;
  • 임상구 (국립수산과학원 남부양식연구소) ;
  • 손상규 (국립수산과학원 남부양식연구소) ;
  • 이진환 (해양대학교 해양과학기술연구소)
  • Received : 2007.11.08
  • Accepted : 2008.01.04
  • Published : 2008.04.30
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Abstract

Growth and water quality in Japanese eel, Anguilla japonica ($6.0{\pm}0.9g$) fed extruded and paste type diets were compared for 8 weeks. Fish in the duplicate tanks were fed with one of three experimental diets: two different extruded pellet diets and one paste type diet. Six FRP tanks were used with stocking density of 3.6 kg per tank (3 m3). Restricted feeds (ca. 2% of body weight) were served twice daily. Weight gains were checked at the end of every two-week interval, and water qualities in terms of NH4-N and NO2-N were determined daily one hour after feeding in the morning. Water temperature, dissolved oxygen, and pH were constantly kept within the optimum range, while fifty percent of total water volume was changed daily. Eels fed the extruded pellet diets showed significantly better (P<0.05) growth performance than did eels fed the paste type diet. The amount of feed waste from the paste type diet was significantly greater than those from the extruded pellet diets (P<0.05). Ammonia (NH4-N) waste was significantly higher from the paste diet than from the extruded pellet diets (P<0.05). These results show that extruded pellet diets are better than the paste type diet for growth and water quality management in eel culture.

Keywords

References

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