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

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)
Publication Information
Journal of Aquaculture / v.22, no.1, 2009 , pp. 118-121 More about this Journal
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.
Keywords
Sea cucumber; Apostichopus japonicus; Growth; Shelter; Sand;
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