Use of fermented tea residues as a feed additive and effects on growth performance, body composition, intestinal enzyme activities, and inflammatory biomarkers in juvenile largemouth bass (Micropterus salmoides)

文献类型： 外文期刊

第一作者： Hu, Mao

作者： Hu, Mao;Zhou, Xinhong;Wang, Yachao;Li, Jin;Wu, Qiuhong;Bao, Songsong;Jiang, Li;Liu, Bo;Zhou, Xinhong

作者机构：

关键词： Digestive enzymes; Fermented tea residues; Growth performance; Immunity; Micropterus salmoides

期刊名称：AQUACULTURE REPORTS （ 影响因子：3.7； 五年影响因子：3.8 ）

ISSN： 2352-5134

年卷期： 2023 年 31 卷

页码：

收录情况： SCI

摘要： This study evaluated the effects of fermented tea residues (TF) on growth capacity, body composition, digestive enzyme activity, intestinal immunity, and inflammatory biomarkers in juvenile largemouth bass (Micropterus salmoides). For the study, four diets were produced: T0 (basal diet), T1, T2 and T3 replaced 2 %, 4 % and 6 % of the basal diet with TF, respectively. All fish were classified into four treatments at random, each of which included 20 fish and three duplicates and reared for 56 days. The results of our trials are as follows: 1) Supplementation with 2 % TF increased the weight gain rate (WGR), final body length (FL) and final body weight (FW) of juvenile largemouth bass (p < 0.05 ). 2) Compared with T0, intestinal protease, lipase and amylase activity increased in juvenile largemouth bass in T2 and T3 groups after supplementation with TF (P < 0.05 ). 3) Feeding TF significantly enhanced the alkaline phosphatase (AKP), superoxide dismutase (SOD), lysozyme (LZM), acid phosphatase (ACP), glutathione peroxidase (GSH-Px) and catalase (CAT) activities and total antioxidant capacity (T-AOC) level in the intestine of juvenile largemouth bass and reduced the malondialdehyde (MDA) content in the intestine compared with T0 (P < 0.05 ). 4) Supplementation with TF enhanced the mRNA expression of intestinal anti-inflammatory factors 1L-10 and TGF-beta and reduced the expression of proinflammatory factors IL-1 beta, IL-15, TNF-alpha and IL-8 in largemouth bass (P < 0.05 ). In conclusion, supplementation with TF could promote growth performance, activity of intestinal digestive enzymes and increase intestinal immunity in juvenile largemouth bass, with a 2 % addition being the most effective.

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