Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Mass Production of Resting Eggs by the Freshwater Rotifer, Brachionus calyciflorus Pallas with Exchange of Culture Water and Supplemental Aeration

환수 및 공기공급에 따른 담수산 rotifer, Brachionus calyciflorus의 내구란 대량생산

  • Kwon, O-Nam (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • Park, Heum-Gi (Faculty of Marine Bioscience & Technology, Kangnung National University)
  • 권오남 (강릉대학교 해양생명공학부) ;
  • 박흠기 (강릉대학교 해양생명공학부)
  • Published : 2005.05.25
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Abstract

This study was performed to investigate the formation and mass production of resting eggs by freshwater rotifer, Brachionus calyciflorus as influenced by different aeration supplements and exchange intervals of culture water in 15-L culture vessels and 500 L culture tanks. The maximum densities and mixis rates of the rotifers were not different between experimental group exposed to air or oxygen supplements. However, the fertilization rate and formation of resting eggs of the rotifers in the air-supplemented group were significantly higher than those in the oxygen supplemented group. In the experiment concerning exchange interval of culture water, the maximum density of the rotifers and formation of resting eggs in the batch culture were significantly higher than those in the semi-continuous culture with exchange of water every day. The formation of resting eggs per Chlorella dry weight was highest in the semi-continuous culture with exchange of water every day. The resting eggs of rotifers were produced at a density of $51.8{\sim}57.9{\times}10^6$ eggs in 500-L culture tanks. In this study, the batch culture with air is an effective method for mass production of resting eggs by the freshwater rotifer, B. calyciflorus, and the efficiency of mass production of resting eggs by this rotifer was similar to that of the seawater rotifers, B. plicatilis and B. rotundiformis.

본 연구는 통기방법과 배양수의 환수에 따른 담수산 rotifer B. calyciflorus의 내구란 형성을 조사하였고 0.5 톤 수조에서 내구란 대량 생산을 수행하였다. 산소와 공기를 공급한 실험구에 있어서 rotifer의 최고밀도와 유성생식률은 차이는 없으나 수정률과 내구란 형성은 공기를 공급한 실험구가 산소를 공급한 실험구보다 높게 나타났다. 배양수의 환수간격에 따른 실험에서 환수를 하지 않은 실험구가 rotifer 최고밀도와 내구란 형성은 환수를 한 실험구(매일 환수한 실험구)보다 높게 나타났지만 내구란 생산의 효율적인 측면에서 Chlorella 건조중량당 내구란 형성은 환수를 한 실험구(매일 환수한 실험구)에서 가장 높게 나타났다. 또한 0.5톤 수조에서 내구란의 총 생산량은 $51.8{\sim}57.9{\times}10^6$개로 나타났다. 본 연구의 결과를 종합하여 볼 때, 공기를 공급한 batch 배양이 담수산 rotifer, B. calyciforus의 내구란을 대량생산하는데 효과적인 방법인 것으로 판단된다. 또한 이종의 내구란 대량생산은 해수산 rotifer B. plicatilis와 B. rotundiformis와 비슷한 생산 효율을 보인 것으로 판단된다.

Keywords

References

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