A ten-week feeding trial on Monopterus albus (initial weight 24.02 ± 0.02 g) was conducted to evaluate effects of four isonitrogenous and isoenergetic diets in which different proportions of fish meal (0, 2.5 %, 5% and 7.5 %) were substituted with Hermetia illucens (HI) larvae meal, corresponding to dietary inclusion levels of 0 (FM), 5.26 % (HI_5.26), 10.52 % (HI_10.52) and 15.78 % (HI_15.78). Compared with FM, weight gain rate and condition factor of M. albus and gumminess and adhesiveness of its muscle tissue were significantly increased in HI_5.26 and HI_10.52 groups (P < 0.05); whereas feed conversion ratio was markedly decreased in HI_5.26 (P < 0.05), and expression of hepatic FASD2 and ME2 was significantly upregulated in HI_5.26 (P < 0.05). Compared with FM, cohesiveness of muscle was significantly decreased in HI groups, but hardness of muscle and expression of hepatic FAS were remarkably upregulated in HI groups (P < 0.05); ACC and ME1 mRNA levels were significantly upregulated in HI_10.52 (P < 0.05); CPT2 mRNA levels were significantly upregulated in HI_5.26 and HI_15.78 (P < 0.05); PPARγ, G6PD and HSL mRNA levels were significantly upregulated in HI_10.52 and HI_15.78 (P < 0.05). Springiness and chewiness of muscle, activity of intestinal lipasewere, serum indexes (glutamic oxalacetic transaminase, catalase, malondialdehyde), several gut bacterial indices (shannon, chao1, ACE, OTUs abundance of proteobacterias) and abundance of hepatic PPARα mRNA in HI_15.78 were remarkably lower than those in FM (P < 0.05), while content of crude lipid, gut firmicutes and hepatic Dgat2 mRNA were significantly lower than FM (P < 0.05). Results showed that HI improved growth performance and balance of gut bacteria of M. albus when supplemented at a rate below 15.78 %, but negative effects on lipid metabolism were observed when HI was supplemented at excessive levels.

进行了为期十周的黄opter（初始体重24.02±0.02 g）喂养试验，以评估四种等氮和等能日粮的饮食效果，其中用不同比例的鱼粉（0％，2.5％，5％和7.5％）代替伊尔米氏菌（HI）幼虫粉，分别对应于饮食中的0（FM），5.26％（HI _5.26），10.52％（HI _10.52）和15.78％（HI _15.78）。与FM，增重率和的条件因素进行比较黄鳝和胶粘性和其肌肉组织的密合性在HI均显著增加_5.26和HI _10.52组（P <0.05）; 而进料转化率在HI明显降低_5.26（P <0.05），和肝FASD2和ME2的表达在HI中显著上调_5.26（P <0.05）。与FM组相比，HI组的肌肉凝聚力明显降低，但HI组的肌肉硬度和肝FAS表达明显上调（P <0.05）。HI _10.52中ACC和ME1 mRNA水平明显上调（P <0.05）; HI _5.26和HI _15.78中CPT2 mRNA水平显着上调（P <0.05）; HI中PPARγ，G6PD和HSL mRNA水平显着上调_10.52和HI _15.78（P <0.05）。分别在HI _15.78中观察到了肌肉的弹性和咀嚼性，肠道脂肪酶的活性，血清指标（谷草乙酰胺转氨酶，过氧化氢酶，丙二醛），几种肠道细菌指标（香农，chao1，ACE，OTUs的变形杆菌数量）以及肝脏PPARαmRNA的丰度。FM低于FM（P <0.05），粗脂，肠纤毛和肝Dgat2 mRNA的含量明显低于FM（P <0.05）。结果表明，HI改善了白bus的生长性能和肠道细菌平衡。 当以低于15.78％的比率补充时，但是当过量补充HI时，观察到对脂质代谢的负面影响。