Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems
A 150 days (150-d) experiment was carried out to investigate the production efficiency, inorganic nitrogen syndrome and bacteria community of indoor biofloc technology (BFT) systems used to rear genetically improved farmed tilapia (Oreochromis niloticus) under 0 (S-0), 10 (S-10), and 20 salinities (...
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KeAi Communications Co., Ltd.
2017-09-01
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| Series: | Aquaculture and Fisheries |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468550X17300473 |
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| author | Guozhi Luo Wenqing Li Hongxin Tan Xiaoqing Chen |
| author_facet | Guozhi Luo Wenqing Li Hongxin Tan Xiaoqing Chen |
| author_sort | Guozhi Luo |
| collection | DOAJ |
| description | A 150 days (150-d) experiment was carried out to investigate the production efficiency, inorganic nitrogen syndrome and bacteria community of indoor biofloc technology (BFT) systems used to rear genetically improved farmed tilapia (Oreochromis niloticus) under 0 (S-0), 10 (S-10), and 20 salinities (S-20). The start-up period for BFT was 50, 60 and 80 d for S-0, S-10 and S-20 groups, respectively. At steady state, the total ammonium nitrogen (NH4+-N) and nitrite nitrogen (NO2−-N) were lower than 3.0 mg/L and 0.34 mg/L, respectively and no nitrate-nitrogen (NO3−-N) accumulation was observed. The fish survival rate was above 95% for all the groups. The final fish biomass of the S-10 group (35.83 ± 1.08 kg/m3) was not significantly different from the S-0 (34.79 ± 1.33 kg/m3) group but was significantly higher than S-20 (32.6 ± 1.04 kg/m3). The feed conversion ratio for the tilapia in S-20 was 1.46, which was higher than the ratio in S-0 (1.40) and S-10 (1.39) tilapia. There was no significant difference in the crude protein content of the back muscle from tilapia of the three experimental groups. No significant difference in blood parameters, except for aspartate aminotransferase and alkaline phosphatase was observed between the three groups. Evaluation of microorganisms in the three BFT systems revealed that Proteobacteria, Bacteroidetes, and Fusobacteria were the top three at the phylum level in all groups. However, a significant difference was observed at the genus level in the bacteria of the three BFTs at different salinity (P < 0.05). |
| first_indexed | 2024-04-24T08:43:35Z |
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| institution | Directory Open Access Journal |
| issn | 2468-550X |
| language | English |
| last_indexed | 2024-04-24T08:43:35Z |
| publishDate | 2017-09-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Aquaculture and Fisheries |
| spelling | doaj.art-c3c5ccdbcda042ad9627355f4d27c4712024-04-16T14:45:26ZengKeAi Communications Co., Ltd.Aquaculture and Fisheries2468-550X2017-09-012522022610.1016/j.aaf.2017.10.002Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systemsGuozhi Luo0Wenqing Li1Hongxin Tan2Xiaoqing Chen3College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaA 150 days (150-d) experiment was carried out to investigate the production efficiency, inorganic nitrogen syndrome and bacteria community of indoor biofloc technology (BFT) systems used to rear genetically improved farmed tilapia (Oreochromis niloticus) under 0 (S-0), 10 (S-10), and 20 salinities (S-20). The start-up period for BFT was 50, 60 and 80 d for S-0, S-10 and S-20 groups, respectively. At steady state, the total ammonium nitrogen (NH4+-N) and nitrite nitrogen (NO2−-N) were lower than 3.0 mg/L and 0.34 mg/L, respectively and no nitrate-nitrogen (NO3−-N) accumulation was observed. The fish survival rate was above 95% for all the groups. The final fish biomass of the S-10 group (35.83 ± 1.08 kg/m3) was not significantly different from the S-0 (34.79 ± 1.33 kg/m3) group but was significantly higher than S-20 (32.6 ± 1.04 kg/m3). The feed conversion ratio for the tilapia in S-20 was 1.46, which was higher than the ratio in S-0 (1.40) and S-10 (1.39) tilapia. There was no significant difference in the crude protein content of the back muscle from tilapia of the three experimental groups. No significant difference in blood parameters, except for aspartate aminotransferase and alkaline phosphatase was observed between the three groups. Evaluation of microorganisms in the three BFT systems revealed that Proteobacteria, Bacteroidetes, and Fusobacteria were the top three at the phylum level in all groups. However, a significant difference was observed at the genus level in the bacteria of the three BFTs at different salinity (P < 0.05).http://www.sciencedirect.com/science/article/pii/S2468550X17300473Genetically improved farm tilapia (GIFT)TilapiaBioflocs technologyGrowth performanceBacteria communityInorganic nitrogen |
| spellingShingle | Guozhi Luo Wenqing Li Hongxin Tan Xiaoqing Chen Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems Aquaculture and Fisheries Genetically improved farm tilapia (GIFT) Tilapia Bioflocs technology Growth performance Bacteria community Inorganic nitrogen |
| title | Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems |
| title_full | Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems |
| title_fullStr | Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems |
| title_full_unstemmed | Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems |
| title_short | Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems |
| title_sort | comparing salinities of 0 10 and 20 in biofloc genetically improved farmed tilapia oreochromis niloticus production systems |
| topic | Genetically improved farm tilapia (GIFT) Tilapia Bioflocs technology Growth performance Bacteria community Inorganic nitrogen |
| url | http://www.sciencedirect.com/science/article/pii/S2468550X17300473 |
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