ĐÁNH GIÁ HIỆU QUẢ VIỆC SỬ DỤNG CHẾ PHẨM SINH HỌC VÀ KHÁNG SINH LÊN SỰ SINH TRƯỞNG VÀ SỨC KHỎE ẤU TRÙNG TÔM THẺ CHÂN TRẮNG Lippopenaeus vannamei (Bone, 1931) GIAI ĐOẠN ẤU TRÙNG NAUPLIUS ĐẾN HẬU ẤU TRÙNG POSTLARVAE 15
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Tóm tắt
EVALUATING EFFECTIVENESS OF APPLICATION OF PROBIOTIC AND ANTIBIOTICS ON THE GROWTH AND HEALTHY OF Lippopenaeus vannamei (Bone, 1931) IN PERIOD NAUPLINUS TO POSTLARVAE 15
This study presents result from the effects of using probiotics compared with antibiotics on the time of metamorphosis, growth, survival rates, gut microflora and some dangerous diseases (MBV, WSSV, YHV, HPV). After 25 cultured days, time of transition from larvae to postlarvae lowest (in NT2) of nauplius when using probiotics was 211±0.44(h). Growth characteristics of postlarvae total length (PL1) to PL15 in NT2 to 6.6±0.09% (p > 0.05). Growth characteristics of Postlarvae volume PL1 to PL15 in NT2 21.5 ± 0.22%/days were the highest. Survival rate of shrimp from 60.6 to 67% in the treatments by probiotic (p > 0.05). The highest density of bacteria in treatment 2 (NT2) (68,000 ± 5291.5 cfu/PL). By PCR analysis, the appearance of MBV, WSSV, YHV, HPV on all the treated studies was not found.
The results demonstrated that probiotics (Viprotech 2ppm, EMT 2ppm, PC2 1ppm) improved the growth of white shrimp in the same period.
Từ khóa
Vannamei shrimp, probiotics, growth, survival rate, tôm thẻ chân trắng, chế phẩm sinh học, tăng trưởng, tỷ lệ sống
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Tài liệu tham khảo
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