Effect of Dietary β-Glucan on Growth Performance, Antioxidant Responses, and Immunological Parameters of Coral Trout (Plectropomus leopardus)
文献类型： 外文期刊
作者： Hao, Xiaoqi 1 ; Lin, Ziyang 2 ; Ma, Zhenhua 2 ; Yang, Yukai 2 ; Zhou, Chuanpeng 2 ; Hu, Jing 2 ; Yu, Wei 2 ; Lin, Heizhao 2 ;
作者机构： 1.Hebei Agr Univ, Ocean Coll, Qinhuangdao 066003, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Minist Agr & Rural Affairs, Guangzhou 510300, Peoples R China
3.Chinese Acad Fishery Sci, Shenzhen Base South China Sea Fisheries Res Inst, Shenzhen 518121, Peoples R China
关键词： beta-glucan; growth; antioxidant capacity; immunomodulation; intestinal morphology; coral trout
期刊名称：FISHES （ 影响因子：2.4； 五年影响因子：2.4 ）
ISSN：
年卷期： 2024 年 9 卷 8 期
页码：
收录情况： SCI
摘要： Although beta-glucan has diverse benefits for fish health, the potential adverse impacts of excessive supplementation are poorly understood. This study investigated the optimal dosage of beta-glucan for coral trout and explored the adverse effects of excessive supplementation. The results revealed that moderate beta-glucan supplementation (1) significantly enhanced the weight gain rate and specific growth rate (SGR); (2) significantly improved the intestinal villus length (0.10%), muscle thickness (0.05-0.15%), and alpha-amylase and chymotrypsin activities (0.05-0.15%); (3) significantly increased liver catalase (CAT), glutathione reductase (GR), alkaline phosphatase, complement 3, immunoglobulin M (IgM), lysozyme, serum superoxide dismutase, CAT, glutathione peroxidase, GR, total antioxidant capacity, acid phosphatase, complement 4, and IgM activities and significantly reduced malondialdehyde contents; (4) upregulated genes in the liver associated with copper-zinc superoxide dismutase (SOD-1), manganese superoxide dismutase (SOD-2), CAT, GSH-Px1a, ACP6, AKP, LZ-c, IgM, C3, and C4-b. However, 0.20% beta-glucan significantly inhibited the growth performance of coral trout compared with 0.10% beta-glucan. Thus, 0.10% beta-glucan represents the optimal dosage for promoting growth, antioxidant activity, and immune responses in coral trout, while higher beta-glucan levels weakened these beneficial effects. With an SGR established by a cubic regression analysis, the optimal level of beta-glucan for maximal growth of coral trout is 0.082%. This study provides new insights into the health impacts of beta-glucan on fish.
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