기수산 물벼룩(Diaphanosoma celebensis)의 대량생산을 위한 대체 먹이원의 효과
Relative Effectiveness of Replacement Diets for Mass Production of the Brackish Water Flea Diaphanosoma celebensis
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This study examined the effect of formulated diets (composed of condensed freshwater Chlorella or Schizochytrium sp., Crypthecodinium sp., and EPA oil sources derived from baker’s yeast) on the population growth and fatty acid composition of the brackish water flea (Diaphanosoma celebensis) to determine diet effectiveness for mass production. Results indicated that the highest maximum density, fecundity, and population specific growth rate (SGR) of the flea were observed using a diet of Tetraselmis suecica (control). However, results using condensed freshwater Chlorella and the mixed treatment of Schizochytrium sp.+Crypthecodinium sp.+EPA oil did not significantly differ from the control treatment (P>0.05). Thus, T. suecica could be replaced with a combination diet of Schizochytrium sp., Crypthecodinium sp., and EPA oil in condensed freshwater Chlorella without growth interruption of D. celebensis. As the percentage of combination diet (mix of Schizochytrium sp., Crypthecodinium sp., and EPA oil) in condensed freshwater Chlorella increased,the level of ARA, EPA, DHA, and n-3 HUFA in D. celebensis also increased. However, the population density of D. celebensis sharply decreased with the use of treated supplements C5M5 (CHL [50%] and Crypthecodinium sp.+Schizochytrium sp. + EPA oil [MIX 50%]). The optimum proportions of CHL and MIX for D. celebensis within the mixture were 70% and 30%, respectively. Based on the results, the combination of Schizochytrium sp., Crypthecodinium sp., and EPA oil in condensed freshwater Chlorella appears to be a stable and effective food source for mass production of D. celebensis.
Abstract
This study examined the effect of formulated diets (composed of condensed freshwater Chlorella or Schizochytrium sp., Crypthecodinium sp., and EPA oil sources derived from baker’s yeast) on the population growth and fatty acid composition of the brackish water flea (Diaphanosoma celebensis) to determine diet effectiveness for mass production. Results indicated that the highest maximum density, fecundity, and population specific growth rate (SGR) of the flea were observed using a diet of Tetraselmis suecica (control). However, results using condensed freshwater Chlorella and the mixed treatment of Schizochytrium sp.+Crypthecodinium sp.+EPA oil did not significantly differ from the control treatment (P>0.05). Thus, T. suecica could be replaced with a combination diet of Schizochytrium sp., Crypthecodinium sp., and EPA oil in condensed freshwater Chlorella without growth interruption of D. celebensis. As the percentage of combination diet (mix of Schizochytrium sp., Crypthecodinium sp., and EPA oil) in condensed freshwater Chlorella increased,the level of ARA, EPA, DHA, and n-3 HUFA in D. celebensis also increased. However, the population density of D. celebensis sharply decreased with the use of treated supplements C5M5 (CHL [50%] and Crypthecodinium sp.+Schizochytrium sp. + EPA oil [MIX 50%]). The optimum proportions of CHL and MIX for D. celebensis within the mixture were 70% and 30%, respectively. Based on the results, the combination of Schizochytrium sp., Crypthecodinium sp., and EPA oil in condensed freshwater Chlorella appears to be a stable and effective food source for mass production of D. celebensis.
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