Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Food value or Freshwater Rotifer (Brachionus calyciflorus) for Culture of Sweetfish (Plecoglossus altivelis) Larvae

은어 자어 (Plecoglossus altivelis) 사육에 있어서 담수산 rotifer (Brachionus calyciflorus)의 먹이효과

  • LEE Kyun Woo (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • PARK Heum Gi (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • LEE Sang-Min (Faculty of Marine Bioscience & Technology, Kangnung National University) ;
  • HAN Hyon Sob (West-Sea Fisheries Research Institute) ;
  • LIM Young Soo (Uljin Marine Hatchery, National Fisheries Research & Development institute)
  • 이균우 (강릉대학교 해양생명공학부) ;
  • 박흠기 (강릉대학교 해양생명공학부) ;
  • 이상민 (강릉대학교 해양생명공학부) ;
  • 한현섭 (국립수산과학원 서해수산연구소) ;
  • 임영수 (국립수산과학원 울진 수산종묘시험장)
  • Published : 2004.02.01
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Abstract

This study investigated the possibility of salinity acclimation of freshwater rotifers (Brachionus calyciflorus) as live food for sweetfish (Plecoglossus altivelis) larvae, and also examined the optimal salinity for the growth of sweetfish. Freshwater rotifers cultured in 0 and 4 PSU and seawater rotifers (B. rotundiformis) cultured in 33 PSU were supplied to the larvae with four kinds of enrichment material (condensed freshwater Chlorella, $\omega-yeast,$ baker's yeast, Super Selco) and larval growth at 4 PSU was examined. Growth of the freshwater rotifers positively increased from 0 PSU to 6 PSU, but decreased when over 8 PSU was reached. Growth and survival of the sweet fish larvae reared in 0 PSU were significantly lower than those reared in either 4 PSU or 33 PSU. This indicated that the freshwater rotifers (B. calyciflorus) could be used as live food for sweetfish larvae reared in 4 PSU. The body weight of sweetfish larvae fed on freshwater rotifers enriched with Super Selco was the highest at 0.163 mg, but there was no significant difference in survival and body length of the fish fed with the other enrichment materials. The content of n-3 HUFA of the sweetfish larvae fed on the freshwater rotifers enriched with Super Selco and the condensed freshwater Chlorella was higher than that enriched with $\omega-yeast$ and baker's yeast. These results indicated that B. calyciflorus cultured with the condensed freshwater Chlorella could be used for the sweetfish larvae without enrichment, and the most efficient enrichment material for B. calyciflorus is Super Selco.

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References

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