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| Indoor Biofloc Culture of Pacific White Shrimp Litopenaeus vannamei in Low Temperature Season |
| ZHOU Hui1, HAN Manqiang1,2, TANG Baogui1, WU Xumin1, DU Shumin1, TAN Ruihua1, GONG Hanfu1, LIN Zhihao1, HE Yixun1, ZHONG Yuqi1, LIN Guiteng1 |
1. Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal, Regular High Education Institute of Guangdong Province, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China;
2. Zhanjiang Haisite Aquatic Products Technology Co., Ltd., Zhanjiang 524088, China |
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Abstract In low temperature season, the growth index and body composition of Pacific white shrimp Litopenaeus vannamei cultured in the indoor biofloc system were studied. In the experiment, clean water culture (CW, fed ad libitum) was set as the control group, and biofloc culture (BF, 70% feeding amount of the CW group) was set as the experimental group. There were 3 tanks in each group and 18 individuals of Pacific white shrimp (3.17±0.37) g per tank cultured for 42 days, recorded the feeding rate of Pacific white shrimp, measured the body weight and body composition of the Pacific white shrimp, and calculated the growth index. The results showed: (1) the average water temperature in the CW group was (21.3±2.0) ℃, the average daily food intake rate of Pacific white shrimp was (1.87±0.30)%, which did not change significantly (P>0.05), and there was no significant correlation between water temperature and the average daily food intake rate of Pacific white shrimp (P>0.05). (2) From 31 to 42 days, the water temperature of the BF group was significantly higher than that in the CW group (P<0.05). (3) With the food intake rate only 70% in the CW group, the final body weight, weight gain rate, specific growth rate and body composition of Pacific white shrimp in the BF group and the CW group were not significantly different (P>0.05). There were significantly higher feed conversion efficiency and protein efficiency in the Pacific white shrimp in the BF group than those in the CW group (P<0.05). It was found that in the low temperature season, compared with clean water culture, the indoor biofloc culture mode effectively improved the feed conversion ratio of the Pacific white shrimp and maintained higher water temperature, while the growth rate of the Pacific white shrimp did not showed significant difference.
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Received: 01 August 2020
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