Abstract:

To preliminarily explore the effects of dietary supplementation with Cetobacterium products on the growth performance indicators， liver health and gut microbiota of pond cultured bighead carp （Aristichthys nobilis）， bighead carp were randomly divided into control and Cetobacterium products supplemented treatments， and a 8-weeks trial was carried out. The results showed that dietary supplementation with 0.2 kg·t^-1Cetobacterium products significantly increased the carcass ratio of bighead carp， while significantly decreased the viscerosomatic， hepatosomatic and intestinosomatic indexes， and also significantly enhanced the activities of intestinal lipase and cellulose， and reduced hepatic lipid deposition. In addition， feeding Cetobacterium products significantly increased the abundance of beneficial bacteria at both phylum and genus levels in the gut， and altered the composition and structure of gut microbiota in bighead carp. Above results indicated that Cetobacterium products could improve the growth performance， enhance digestive enzyme activities， promote liver health， and optimize the gut microbiota structure of bighead carp.

Key words: Cetobacterium, pond culture, bighead carp, liver health, gut microbiota

摘要：

为初步探究饲料中添加鲸杆菌产品对池塘养殖鳙（Aristichthys nobilis）形体指标、肝脏健康及肠道菌群的影响，以鳙为研究对象，随机分为对照和鲸杆菌处理2个试验组开展为期8周的池塘养殖试验。结果表明，饲料中添加0.2 kg·t^-1鲸杆菌产品能够显著提高鳙躯壳比，显著降低鳙脏体比、肝体比和肠体比；显著提高肠道脂肪酶和纤维素酶活性，同时降低了肝脏脂肪沉积水平。此外，饲喂鲸杆菌产品显著增加了鳙肠道门和属水平有益菌的丰度，改变了鳙肠道菌群的组成结构。综上表明，鲸杆菌产品具有改善鳙生长性能、提高消化酶活性、促进肝脏健康和优化肠道菌群结构的作用。

关键词: 鲸杆菌, 池塘养殖, 鳙, 肝脏健康, 肠道菌群