Effects of dietary melatonin supplementation on growth performance and intestinal health of rice field eel (Monopterus albus)
文献类型: 外文期刊
作者: Lv, Weiwei 1 ; Li, Muyan 2 ; Mao, Yifan 2 ; Huang, Weiwei 1 ; Yuan, Quan 1 ; Li, Mingyou 2 ; Zhou, Qiubai 3 ; Yang, Hang 1 ; Zhou, Wenzong 1 ;
作者机构: 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China
2.Shanghai Ocean Univ, Key Lab Integrated Rice Fish Farming, Minist Agr & Rural Affairs, Shanghai 201306, Peoples R China
3.Jiangxi Agr Univ, Coll Anim Sci & Technol, Nanchang 330045, Peoples R China
关键词: Melatonin; Growth; Intestinal health; Monopterus albus
期刊名称:COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS ( 影响因子:2.2; 五年影响因子:2.5 )
ISSN: 1744-117X
年卷期: 2024 年 52 卷
页码:
收录情况: SCI
摘要: The objective was to assess the impact of melatonin supplementation on the growth performance and intestinal health of rice field eel, Monopterus albus. Three hundred and sixty fish (28.46 +/- 0.24 g) were fed five diets supplemented with melatonin of 0, 30, 60, 120, and 240 mg/kg for 70 days. The study found that the variables FBW, WGR, SGR, and FCR exhibited a statistically significant quadratic relationship (P < 0.05) with the dietary melatonin concentrations, and the highest FBW, WGR and SGR as well as lowest FCR were observed in the 120 mg/kg melatonin group, digestive enzymes activities (such as amylase, trypsin, and lipase) also had significant quadratic relationship (P < 0.05), and the highest intestinal villus height and goblet cells were found in the 120 mg/kg diet (P < 0.01), melatonin in diets significantly increased SOD and CAT activities in serum, up-regulated the expression of anti-inflammatory factors (IL-10) and tight junction protein (ZO-1), and down-regulated the expression of pro-inflammatory factors (IL-1 beta, IL-8, IL-15, and TNF-alpha) in the gut, dietary melatonin improved the intestinal microflora compositions, in the group that supplementation a dosage of 120 mg/kg, there was a noticeable rise in the abundance of Firmicutes and the ratio of Firmicutes/Bacteroidota, compared with control group (P < 0.1). Conclusively, dietary supplementation of melatonin promoted growth performance, enhanced intestinal immune capacity and serum antioxidant level, and improved intestinal morphology properties and intestinal flora composition in M. albus. In conclusion, based on quadratic broken-line regression analysis of WGR and FCR, the optimal concentration of melatonin to be supplied is predicted to be 146-148 mg/kg.
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