Effects of dietary chitosan oligosaccharide on the growth, intestinal microbiota and immunity of juvenile red claw crayfish (Cherax quadricarinatus)
文献类型： 外文期刊
作者： Zhang, Ze-Long 1 ; Cao, Yan-Lei 2 ; Xu, Jia-Rui 2 ; Zhang, Xiu-Xia 2 ; Li, Jia-Jun 2 ; Li, Jun-Tao 2 ; Zheng, Pei-Hua 2 ; Xian, Jian-An 1 ; Lu, Yao-Peng 2 ;
作者机构： 1.Hainan Univ, Ocean Coll, Haikou 570228, Peoples R China
2.Chinese Acad Trop Agr Sci, Hainan Inst Trop Agr Resources, Inst Trop Biosci & Biotechnol, Hainan Prov Key Lab Funct Components Res & Utiliza, Haikou 571101, Peoples R China
3.Hainan Inst Trop Agr Resources, Key Lab Biol & Genet Resources Trop Crops Hainan P, Haikou 571101, Peoples R China
4.Hebei Agr Univ, Ocean Coll, Qinhuangdao 066003, Peoples R China
5.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Peoples R China
关键词： Chitosan oligosaccharide; Cherax quadricarinatus; Growth performance; Non-specific immunity; Intestinal microbiota
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）
ISSN： 1050-4648
年卷期： 2024 年 145 卷
页码：
收录情况： SCI
摘要： This study aimed to evaluate the potential benefits of chitosan oligosaccharide (COS) on red claw crayfish (Cherax quadricarinatus) and explore its underlying mechanisms. The crayfish were randomly divided into six groups, and the diets were supplemented with COS at levels of 0 (C0), 0.2 (C1), 0.4 (C2), 0.6 (C3), 0.8 (C4), and 1 (C5) g kg-1. Treatment with COS significantly improved the growth performance of the crayfish with a higher weight gain rate (WGR) and specific growth rate (SGR) in the C2 group compared to the C0 group. Additionally, the content of crude protein in the crayfish muscles in the C1 group was significantly higher than that of the C0 group. Regarding non-specific immunity, the activities of superoxide dismutase (SOD), catalase (CAT), gluta-thione peroxidase (GSH-Px), and alkaline phosphatase (AKP), and the levels of expression of the genes related to immunity (SOD; anti-lipopolysaccharide factor [ALF]; thioredoxin1 [Trx1]; C-type lysozyme, [C-LZM]; and GSH-Px) in the hepatopancreas and hemolymph increased significantly (P < 0.05) after supplementation with 0.4 g kg(- 1) of COS, while the content of malondialdehyde (MDA) decreased (P < 0.05). The survival rate of C. quadricarinatus increased (P < 0.05) in the C2, C3, C4, and C5 groups after the challenge with Aeromonas hydrophila. This study found that COS has the potential to modulate the composition of the intestinal microbiota and significantly reduce the abundance of species of the phylum Proteobacteria and the genera Aeromonas and Vibrio in the gut of C. quadricarinatus, while the abundance of bacteria in the phylum Firmicutes and the genus Candidatus_Hepatoplasma improved significantly. This study suggests that the inclusion of COS in the diet of C. quadricarinatus can enhance growth, boost immunity, and increase resistance to infection with A. hydrophila, especially when supplemented at 0.4-0.8 g kg(- 1).
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