Effect of Different Substrates in the Rearing Tank on Growth and Body Composition of Juvenile Sea cucumber Apostichopus japonicus

사육수조 내 사육기질이 어린 해삼의 성장 및 체조성에 미치는 영향

  • Seo, Joo-Young (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • Kim, Dong-Gyu (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • Kim, Guen-Up (Gangwon Province Fisheries resources Institute) ;
  • Cho, Sung-Su (Gangwon Province Fisheries resources Institute) ;
  • Park, Heum-Gi (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • Lee, Sang-Min (Faculty of Marine Bioscience and Technology, Kangnung National University)
  • 서주영 (강릉대학교 해양생명공학부) ;
  • 김동규 (강릉대학교 해양생명공학부) ;
  • 김근업 (강원도수산자원연구소) ;
  • 조성수 (강원도수산자원연구소) ;
  • 박흠기 (강릉대학교 해양생명공학부) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Published : 2009.02.25

Abstract

This experiment was conducted to evaluate the effects of different substrates in rearing tank on growth and body composition of juvenile sea cucumber Apostichophus japonicus. Sea cucumber (average weight 3.6) were randomly distributed at a density of 10 juvenile per tank into nine tanks providing three different substrates including free-substrates, sand and wave-shaped plastic sheet as (shelter). Juveniles were fed with a commercial feed once in every 2 days for 8 weeks. At the end of the experiment, survival of sea cucumber was not affected by the presence of substrates (P>0.05). Weight gain and specific growth rate of sea cucumber reared in the tanks with sand were significantly higher than those of sea cucumber reared in the tanks with shelter and without substrate (P<0.05). Crude protein and crude lipid of whole body in sea cucumber reared in free-substrate tanks were significantly higher than those of juvenile reared in the tanks with other substrates (P<0.05). Higher ash content was obtained in sea cucumber reared in the tanks with sand compared to that of juvenile reared in the tanks with other substrates (P<0.05). The results of this study suggest that growth and proximate composition of whole body of sea cucumber was significantly affected by substrates. Among materials tested, sand may be a proper substrate for sea cucumber culture.

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