Tapping Chlorella vulgaris potential for enhanced growth, immunity, digestion, microbiota, and immunometabolism in Litopenaeus vannamei feeding across varied salinities
文献类型： 外文期刊
作者： Chen, Jian 1 ; Wang, Hongming 1 ; Yuan, Hang 1 ; Hu, Naijie 1 ; Zheng, Yudong 1 ; Tan, Beiping 1 ; Shi, Lili 1 ; Zhang, Shuang 1 ;
作者机构： 1.Guangdong Ocean Univ, Coll Fisheries, Zhanjiang, Peoples R China
2.Zhanjiang Expt Stn, CATAS, Zhanjiang, Peoples R China
3.Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Techn, Zhanjiang, Peoples R China
4.Aquat Anim Precis Nutr & High Efficiency Feed Engn, Zhanjiang, Peoples R China
5.Guangdong Prov Key Lab Aquat Anim Dis Control & Hl, Zhanjiang, Peoples R China
关键词： Litopenaeus vannamei; Chlorella vulgaris; Salinity; Intestinal microbiota; Transcriptome
期刊名称：AQUACULTURE （ 影响因子：4.5； 五年影响因子：4.6 ）
ISSN： 0044-8486
年卷期： 2024 年 581 卷
页码：
收录情况： SCI
摘要： This study explored the use of Chlorella vulgaris (CHL) in Litopenaeus vannamei under varying salinity conditions. Juvenile L. vannamei (initial weight 0.38 +/- 0.01 g) were fed experimental diets for 8 weeks at different salinity levels: low (15%o), moderate (30%o), and high (45%o). The control diet contained 589 g/kg fishmeal (FM) as the sole protein source, while experimental diets included 150 g/kg FM and 492 g/kg CHL as protein sources. Results revealed that shrimp fed with CHL showed a robust survival rate even at higher salinities. Following a Vibrio parahaemolyticus infection challenge, shrimp fed with CHL exhibited higher survival rates than those fed with FM at equivalent salinities. Enzyme activity and gene expression analyses indicated that CHL enhanced immune response and digestion in L. vannamei compared to the FM, even under similar salinity conditions. Additionally, shrimp fed with CHL outperformed those fed with FM under varying salinity stress. Microbiota analysis revealed increased diversity and beneficial bacteria in the intestines of shrimp fed with CHL at the same salinity levels. Transcriptomic sequencing identified genes with differential expression (DEGs) related to immune and metabolic pathways. Furthermore, a combined analysis of microbiota and DEGs revealed that CHL also had a beneficial impact on the composition of the intestinal microbiota and controlled the expression of genes related to immune and metabolic pathways. In summary, CHL as a primary protein source improved survival rate, disease resistance, immune response, and digestion in L. vannamei, positively impacting intestinal microbiota and gene expression, and enhancing adaptability to salinity changes.
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