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Kỷ yếu hội nghị quốc tế 2014
Số tạp chí Abstract book(2014) Trang: 15
Tạp chí: IFS 2014 4th International Fisheries Synposium
Liên kết:

The study was conducted with two experiments to determine the ability of using bread yeast to replace algae in mass culture of copepod and to optimize the harvesting rates in order to formulate culture biomass process of Schmackeria dubia. Experiment 1 was implemented with 5 treatments of different feeding regimes including (i) 100 % algae (Chaetoceros calcitrans), (ii) 100 % yeast, (iii) 25 % algae and 75 % yeast, (iv) 50 % algae and 50 % yeasts; (v) 75 % algae and 25 % yeasts. Algae were fed with 500,000 cells.mL-1, and yeasts with dose of 1 g per 100,000 copepods. The experiment was designed completely random in 1L beaker system with copepod density of 1 ind.mL-1 stocked at 20 ppt salinity. Experiment 2 was set up with 4 treatments of different biomass harvesting rates including 0, 15, 20 and 30%. Copepods were fed with 100% algae (from Exp. 1).  The biomass was harvested when copepod density reached 5,000 to 6,000 ind.L-1 and the harvest interval was every three days.  The results showed that after 30 days of culture in Exp. 1, copepods fed with 100% algae obtained highest population growth rate and density (9,200 ± 938 ind.mL-1) on day 6 which were significantly different to other treatments (p

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