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Effects of Culture Methods on the Growth Rates and Fatty Acid Profiles of Euglena gracilis
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 Title & Authors
Effects of Culture Methods on the Growth Rates and Fatty Acid Profiles of Euglena gracilis
Jeong, U-Cheol; Choi, Jong-Kuk; Kang, Chang-Min; Choi, Byeong-Dae; Kang, Seok-Joong;
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The quality and quantity of live food sources strongly influence the success of fish production in farming operations. Thus, critical studies of live forage species are a crucial element for progress in fish aquaculture. The fat content of food is an especially important determinant of growth in marine fish. Omega-3 highly unsaturated fatty acids (HUFA) are essential components of diet that determine the nutritional value of larval fish. Euglena is a protist that has potential as a forage species. These single-celled organisms have plant and animal characteristics they are motile, elliptical in shape and 15–500 μm in diameter. Their nutritional content is excellent, but most studies have focused on cells raised in autotrophic culture. We therefore examined differences in the lipid and fatty acid contents, and the growth of Euglena cells grown under autotrophic, heterotrophic, and mixotrophic conditions. Biomass production reached 15.03 g/L, 12.28 g/L, and 3.66 g/L under mixotrophy, heterotrophy, and autotrophy, respectively. The proportional n-3 HUFA content differed among culture methods: 10.04%, 5.80% and 10.01% in mixotrophic, heterotrophic and autotrophic cultures, respectively. Mixotrophy was to be the best form of cultivation for improving the growth and nutritional content of Euglena.
Euglena gracilis;Fatty acid;Heterotrophic;Autotrophic;Mixotrophic;
 Cited by
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