한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)

  • 제36권6호
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  • Pages.606-613
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  • 2003
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  • 0374-8111(pISSN)
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  • 2287-8815(eISSN)
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)
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고밀도 배양에 있어 먹이종류와 공급량 및 vitamin B12 첨가에 따른 담수산 rotifer (Brachionus calyciflorus)의 성장

Effects of Food and Vitamin B12 on the Growth of a Freshwater Rotifer (Brachionus calyciflorus) in the High Density Culture

  • 이균우 (강릉대학교 해양생명공학부) ;
  • 박흠기 (강릉대학교 해양생명공학부)
  • LEE Kyun Woo (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • PARK Heum Gi (Faculty of Marine Bioscience & Technology, Kangnung National University)
  • 발행 : 2003.12.01
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초록

This study investigated the effects of food type (condensed freshwater Chlorella, dried Chlorella, dried Spirulina, dried Schizochytrium, baker's yeast and $\omega-yeast$) and amount, and supplementation of vitamin $B_{12}$ on the growth of freshwater rotifer (Brachionus calyciflorus) in high density culture. Growth of rotifers fed condensed freshwater Chlorella was the highest and its density ranged $7.65-8.14{\times}10^3\;inds./mL.$ The primary lipid acids of rotifers fed condensed freshwater Chloyella were linoleic and linolenic, and their amount ($\%$ of total fatty acids) were $48.8\%\;and\;26.8\%,$ respectively. This suggests that condensed freshwater Chlorella would be an effective diet for high quality and quantity rotifers, which in turn serve as live food for freshwater fish larvae. Growth rate of rotifers with Chlorella supplementation increased as amount of supplementation increased up to 1.5 and 2.5 mg at 28 and $32^{\circ}C$, respectively. However, undissolved ammonia toxicity and packing volume of Chlorella in culture medium, reached the optimal conditions for the stable and effective cultivation of rotifers when amount of condensed freshwater Chlorella was 1.5 mg in dry weight per 1,000 rotifers at $28^{\circ}C\;and\;32^{\circ}C$ Growth of rotifers in condensed freshwater Chlorella with vitamin $B_{12}$ supplementation was significantly higher than that of rotifers without supplementation. However, no significant difference was found among the different concentrations of vitamin $B_{12}.$ Therefore, vitamin $B_{12}$ could improve the growth of rotifers (B. calyciflorus).

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