Trong công thức 1, luân trùng được cho ăn men bánh mì (L1); công thức 2, luân trùng được cho ăn hỗn hợp hai loài Nannochloropsis oculata, Chaetoceros gracilis (L2); công thức 3, luân trùng được cho ăn sinh khối tươi S. mangrovei PQ6 (L3). Kết quả thu được cho thấy sinh khối S. mangrovei PQ6 có thể thay thế men bánh mì và vi tảo quang tự dưỡng để nuôi luân trùng. | Sử dụng sinh khối Schizochytrium mangrovei PQ6 làm thức ăn cho luân trùng trong ương nuôi ấu trùng cá bống bớp (Bostrichthys sinensis, Lacepede, 1881) TAP CHI SINH HOC 2019, 41(2): 79–88 DOI: UTILIZATION OF Schizochytrium mangrovei PQ6 AS FEED FOR ROTIFER Brachionus plicatilis IN REARING BLACK SLEEPER’S LARVAE (Bostrichthys sinensis, Lacepede, 1881) Pham Thanh Cong1, Hoang Thi Lan Anh2, Dang Diem Hong2,3,4,* 1 Research Institute for Marine Fisheries, Ministry of Agriculture and Rural Development, Vietnam 2 Institute of Biotechnology, VAST, Vietnam 3 Graduate University of Science and Technology, VAST, Vietnam 4 Thuyloi University, Ha Noi, Vietnam Received 25 February 2019, accepted 4 May 2019 ABSTRACT Schizochytrium mangrovei PQ6 contains many important polyunsaturated fatty acids, such as docosahexaenoic acid (DHA, C22: 6 -3), eicosahexaenoic acid (EPA, C20: 5 -3) and docosapentaenoic acid (DPA, C22: 5 -6). These fatty acids are essential for survival and growth of many marine fish larvae. In this paper, fresh biomass of S. mangrovei PQ6 was used for culturing rotifer Brachionus plicatilis. In the first formula (L1), rotifers were fed on baker’s yeast; in second formula (L2), rotifers were fed on mixed two microalgae, Nannochloropsis oculata and Chaetoceros gracilis; in the third formula (L3), rotifers were fed on S. mangrovei PQ6 biomass. The results indicated that S. mangrovei PQ6 biomass can replace baker’s yeast and autotrophic microalgae in feeding rotifers. Total lipid, total fatty acid and polyunsaturated fatty acid contents of rotifers fed on formula 3 (S. mangrovei PQ6) were higher than those within others. High polyunsaturated fatty acid (C ≥ 20) in omega-3 and 6 groups; DHA and DPA contents of rotifers fed on S. mangrovei PQ6 were the highest, accounting for of total fatty acid; and polyunsaturated fatty acids, corresponding to .
