Effects of Feeding Attractants on the Growth and Body Composition, Digestive Enzyme and Serum In- dices of Hucho taimen

• Published in: 动物与饲料科学：英文版 Vol. 4; no. 5; pp. 236 - 240
• Main Author: WANG Chang-an XU Qi-you CHANG Ya-ping XU Hong YIN Jia-sheng
• Format: Journal Article
• Language: English
• Published: 2012
• Subjects: 体成分; 哲罗鱼; 引诱; 氢氧化钠; 氧化三甲胺; 消化酶活性; 生长性能; 血清指标
• ISSN: 1943-9911

[ Objective] The aim was to study the effects of four feeding attractants（dimethyl-15-propiothetin, trimethylamine oxide, betaine, sodium- 5＇-inosinate） on feed intake, growth performance, body composition, digestive enzyme activities and serum indices of Hucho taimen with initial body weight 9.39 ±0.26 g. [ Method] The Hucho taimen was raised in water flow system. There was one control group and four process group. Each diet was randomly assigned to triplicates of 50 fish for 56 days. During the experiment, the water temperature fluctuated from 9.3℃ to 14.2℃ and the dissolved oxygen was above 8.0 mg/L. [ Result ] The weight gain rate and specific growth rate increased significantly by adding 0.2% dimethyl- 13-propiothetin, 0.2% trimethylamine oxide, 0.2% betaine, but there were no changes with 0.05% sodium-5＇-inosinate supplementation （ P 〉 0.05）. The body crude protein increased significantly by supplementing 0.2% dimethyl-15-propiothetin（ P 〈0.05）, and body crude lipid decreased signifi- cantly by adding 0.2% trimethylamine oxide and 0.2% betaine（ P 〈0.05）, but body composition had no changes by supplementing 0.05% sodium- 5＇-inosinate（ P 〉0.05）. The digestive enzyme activities increased significantly by adding 0.2% dimethyl-13-propiothetin and 0.2% trimethylamine oxide（ P 〈0.05）, and the lipase increased significantly by supplementing 0.2% betaine（ P 〈 0.05）, but digestive enzyme activities had no changes supplemented 0.05% sodium-5＇-inosinate（ P 〉 0.05）. The serum total protein, albumin and globulin increased significantly added 0.2% dimethyl-15- propiothetin（ P 〈0.05）, and the high density lipoprotein content increased while cholesterol, triglycedde and low density lipoprotein decreased sig- nificantly added 0.2% trimethylamine oxide and 0.2% betaine（ P 〈 0.05）, and serum complement 3 and complement 4 increased significantly sup- plemented 0.05% sodium-5＇-inosinate （ P 〈 0.05）. [ Conclusion] The food intake, growth performance, body composition and digestive ability of taimen were improved supplemented with 0.2% dimethyl-15-propiothetin, 0.2% trimethylamine oxide and 0.2% betaine, respectively（ P 〈 0.05）, but not 0.05% sodium-5＇-inosinate. The immunity of body was improved by adding 0.05% sodium-5＇-inosinate.