文献类型： 外文期刊

作者： Zheng, Chaozhong ¹ ; Cao, Junming ² ; Chi, Shuyan ¹ ; Dong, Xiaohui ¹ ; Yang, Qihui ¹ ; Liu, Hongyu ¹ ; Zhang, Shuang ¹ ; Xie, Shiwei ¹ ; Tan, Beiping ¹ ;

作者机构： 1.Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Nutr & Feed, Zhanjiang, Peoples R China

2.Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Techn, Zhanjiang, Peoples R China

3.Aquat Anim Precis Nutr & High Efficiency Feed Engn, Zhanjiang, Peoples R China

4.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou, Peoples R China

关键词： Clostridium autoethanogenum protein; Dietary phosphorus supplementation; Pacific white shrimp; Growth; Immunity; Gut histology; Gut microbiota

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.622； 五年影响因子：4.799 ）

ISSN： 1050-4648

年卷期： 2022 年 131 卷

页码：

收录情况： SCI

摘要： The study evaluated the effects of dietary phosphorus supplementation on the fishmeal replacement with Clos-tridium autoethanogenum protein (CAP) in the diet of L. vannamei. Four isonitrogenous and isolipid diets were formulated: the PC diet contains 25% fishmeal, the NC, P1 and P2 diets were replaced 40% fishmeal with CAP and supplemented with 0, 0.8 and 1.6% NaH2PO4 respectively (equivalent to dietary phosphorus level of 0.96%, 1.12% and 1.27%). Sampling and V. parahaemolyticus challenge test were conducted after 50-day-feeding (initial shrimp weight 1.79 +/- 0.02 g). The results showed that there were no significant differences in the growth performance of shrimp among the 4 groups. The expressions of dorsal in the gut were significantly lower in shrimp fed the P1 and P2 diets than shrimp fed the NC diet and the expression of peroxinectin in the gut was lower in shrimp fed the NC diet than others. The cumulative mortality of shrimp after V. parahaemolyticus challenge was significantly lower in shrimp fed the P2 diet than those fed the NC diet. After the challenge, genes ex-pressions related to the prophenoloxidase activating system (proPO, lgbp, ppaf) were inhibited in the hepato-pancreas of shrimp fed NC diet but activated in shrimp fed the P1 diet compared to those fed the PC diet. The AKP and T-AOC activities were higher in shrimp fed the P2 diet than those fed the other diets. The thickness of muscle layer of shrimp fed the P1 diet was thicker than that in the other groups, and significant stress damage happened in the midgut of the shrimp fed the NC diet. The abundance of Pseudoalteromonas, Haloferula and Ruegeria in shrimp fed the P1 diet was higher than those fed the other diets, while Vibrio in shrimp fed the P2 diet was higher than those fed the other diets. This indicated that a low fishmeal diet with dietary phosphorus level of 1.12% could improve the histology, enhance immune response, and increase the abundance of beneficial bacteria in the gut of shrimp. The low fishmeal diet with dietary phosphorus level of 1.27% could improve disease resistance and antioxidant capacity, but there was a possibility of damage to the gut histology as well as increasing abundance of Vibrio in the gut microbiota of shrimp.