Effect of Picochlorum sp. addition on water quality, microalgae community composition and production performance in the culture of Litopenaeus vannamei

文献类型： 外文期刊

第一作者： Chen, Zhao

作者： Chen, Zhao;Wang, Yuzhen;Tian, Chen;Chang, Zhiqiang;Li, Jian;Meng, Gao;Chen, Zhao;Tian, Chen;Chang, Zhiqiang;Li, Jian;Meng, Gao

作者机构：

关键词： Picochlorum sp.; Litopenaeus vannamei; Water quality; Microalgae community; Enzyme activity

期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.4； 五年影响因子：2.7 ）

ISSN： 0967-6120

年卷期： 2024 年 32 卷 7 期

页码：

收录情况： SCI

摘要： To evaluate effects of microalga addition in the intensive Litopenaeus vannamei farming system, the amount of Picochlorum sp. in culture water was adjusted to be 1 x 10(4) cells/mL (KH_1), 2 x 10(4) cells/mL (KH_2), or 4 x 10(4) cells/mL (KH_4) respectively by artificial addition, and that without microalgal addition was set as the control. First, it was found that Picochlorum sp. addition was effective to reduce the total ammonia nitrogen (TAN), nitrite, phosphate, and chemical oxygen demand (COD) in culture water, and the water quality of KH_4 was the best among various groups after a 30-day culture, with reduction of 89.85% TAN, 78.17% nitrite, 50.00% phosphate, and 63.28% COD in comparison with the control. Second, addition of Picochlorum sp. had a significant impact on the microalgae community structure of shrimp culture system, and it has become the absolute dominant genus in KH_1, KH_2, and KH_4 group, with relative abundances of 86.57%, 95.48%, and 99.01% respectively, whereas Chaetoceros (51.05%) dominate in the control. Moreover, the growth performance of shrimp in KH_2 and KH_4 groups were better than those in the control (P < 0.05), and the superoxide dismutase (SOD) and lysozyme (LZM) activity in hepatopancreas increased by 31.73-78.05% and 16.93-73.74% for the Litopenaeus vannamei in KH_2 and KH_4. The results of this study indicated that artificial addition of Picochlorum sp. could be effective to improve the water quality and shrimp growth, and be a feasible environmental regulation method in shrimp aquaculture.

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