Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Different Combinations of Condensed Chlorella and Baker′s Yeast for Mass Culture of the Freshwater Rotifer, Brachionus calyciflorus Pallas

담수산 농축 Chlorella와 빵효모의 혼합 공급 비율에 따른 담수산 Rotifer, Brachionus calyciflorus Pallas의 대량배양

  • 이균우 (강릉대학교 해양생명공학부) ;
  • 박흠기 (강릉대학교 해양생명공학부) ;
  • 박기명 (강릉대학교 해양생명공학부)
  • Published : 2000.06.01
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Abstract

To reduce the production cost of the rotifer, different combinations of Chlorella and Baker's yeast were used to mass culture of Brachionus calyciflorus. Rotifer density tended to decrease abruptly at 100% Chlorella-feeding, when unionized ammonia level ranged from 14.1 to 29.6 ppm and DO level from 0.2 to 0.3 ppm. Hence DO level > 0.3 ppm and unionized ammonia level < 14 ppm should be maintained. Production cost of the rotifer was the highest, when a combination of 100 % Chlorella was chosen as food source, but it was about 1.8 times less, when a combination of 70 % Chlorella and 30% yeast was used as food source. However, the highest rotifer density remained almost at the same level, when either of the combination was chosen as food source. A combination of 70 % Chlorella and 30 % yeast is recommended for maximum production of the rotifer at the lowest feed cost.

본 연구는 담수산 rotifer, Brachionus calyciflorus의 경제적인 대량배양을 위해서 담수산 농축 ChloreIla와 빵효모 혼합 공급 비율에 따른 효과를 조사하였다. 담수산 rotifer의 최고밀도와 성장은 Chlorella 공급 비율이 높을수록 빠르게 나타났다. Rotifer 밀도가 증가할 수록 배양수의 용존산소량은 감소하였고 이온화 되지 않은 암모니아량도 증가하였다. 특히, Chlorella 100% 단독구에서 용존산소량이 0.2~0.3 ppm으로 낮아지고 이온화되지 않은 암모니아가 14.1~29.6 ppm으로 급격히 증가함에 따라 rotifer 밀도는 급격히 감소하는 경향을 보였다. 따라서 담수산 rotifer를 안정적으로 대량배양하기 위해서는 용존산소가 0.3 ppm이상, 이온화되지 않은 암모니아가 14 ppm 이하로 유지하여야 할 것으로 판단된다. 먹이의 공급 비율에 따른 rotifer의 생산비는 ChloreIla단독구에서 가장 높았다. 그러나 Chlorella 70%와 빵효모 30%를 혼합 공급하면 rotifer 최고밀도에 있어서 Chlorella 단독구와 유의적인 차이가 나타나지 않으면서 Chlorella 100%단독구보다 생산비가 1.8배 낮기 때문에 Chlorella 70%와 빵효모 30%를 혼합 공급하는 것이 가장 경제적이고 안정적인 먹이비율인 것으로 판단된다.

Keywords

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