전자저널 > 전자저널 > Growth and Survival Rates of Flat Oyster, Ostrea denselamellosa, by Condition of Larval Cultivation

Growth and Survival Rates of Flat Oyster, Ostrea denselamellosa, by Condition of Larval Cultivation

Moon-Ho Yang, Bong-Se Oh and Chang-Hee Han

Department of Biology, Dongeui University, Busan 614-714, Korea

For the effective seedling production of flat oyster, Ostrea denselamellosa, dietary value of live food, densities, water temperature and salinity on growth and survival rate of the larvae were examined. In rearing larvae by feeding them phytoplankton diets, the optimal survival rate and growth rate of larvae were found using a mixed phytoplankton diet which was mixed with Isochrysis galbana, Chaetoceros calcitrans and Chlorella sp. The highest growth and survival rates of the larvae were 208.4% and 38.8% with the phytoplankton diet. In growth and survival rates of larvae with various rearing densities, the highest survival and growth rates were 228.1% and 29.0% at the density of 2 individuals/ml. In observing rearing experiments of the flat oyster larvae under various temperature conditions, average growth rates of the larvae in respect to shell length were 202.2%, 240.4%, 250.6% and 121.3% in natural water temperatures (18-22℃), 24℃, 28℃ and 32℃, respectively. And average survival rates of the larvae were 16.0%, 32.0%, 13.0% and 0% in natural water temperatures (18-22℃), 24℃, 28℃ and 32℃, respectively. In rearing at various salinities, the highest growth rates of the larvae in shell length was 240.0% at 30.0 psu and the highest survival rate was 31.0% at 25 psu.

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