渔业科学进展2017，Vol.38Issue(2)：99-106,8.DOI:10.11758/yykxjz.20160215001
胆汁酸对草鱼(Ctenopharyngodon idellus)的生长性能、肌肉营养成分及消化酶活性的影响
Effects of Bile Acids on Growth Performance, Muscle Composition and Digestive Enzyme Activities of Ctenopharyngodon idellus
摘要
Abstract
This experiment was conducted to study the effects of dietary bile acids levels on growth,muscle composition and digestive enzyme activities of juvenile Ctenopharyngodon idellus.Five hundred and forty healthy fish,mean body weight of (13.11 ±0.58) g,were randomly selected and divided into six groups,with three replicates in each group (30 fish/replicate).Each group was fed a diet containing bile acids level of either 0 (control group),75 mg/kg,150 mg/kg,225 mg/kg,300 mg/kg and 375 mg/kg for a period of 60 days.The results showed that the increase of dietary bile acids levels resulted in an initial elevation of weight gain rate (WGR),specific growth rate (SGR) and followed by a decrease in WGR and SGR when bile acids was 375 mg/kg in the diet.Furthermore,inclusion of 300 mg/kg dietary bile acids produced the highest WGR and SGR (281.18％ and 2.23％/d respectively).By contrast,coupled with the increase of dietary bile acids,the feed conversion ratio (FCR) decreased initially and then increased.The FCR reached the lowest (1.26) level when the dietary bile acids level was 225 mg/kg.Based on square regression analysis,to optimize each growth parameter:WGR,SGR and FCR during C.idellus juvenile growth,the most appropriate inclusion levels of dietary bile acids were 222.15 mg/kg,265.00 mg/kg and 242.86 mg/kg respectively.The crude lipid of muscle during the experiment decreased initially and then leveled out,while the crude protein of muscle increased with the increase of dietary bile acids levels (0-300 mg/kg) and then decreased.Similarly,digestive enzyme activities of segments intestinal and hepatopancreas had a tendency of increasing with the elevated bile acids inclusion and then leveled out at the end.Results indicated that certain range of dietary bile acids levels could promote growth,fat metabolism,reduce fat deposition in muscle and improve meat quality.In conclusion,the bile acids supplementary level of 222.15-265.00 mg/kg is recommended for growing juvenile C.idellus based on the consideration of digestive enzyme activities,meat quality and growth performance.关键词
草鱼/胆汁酸/生长性能/肌肉营养成分/消化酶活性Key words
Ctenopharyngodon idellus/Bile acids/Growth performance/Muscle composition/Digestive enzyme activities分类
农业科技引用本文复制引用
曾本和,廖增艳,向枭,何文萧,岑敏,何善成..胆汁酸对草鱼(Ctenopharyngodon idellus)的生长性能、肌肉营养成分及消化酶活性的影响[J].渔业科学进展,2017,38(2):99-106,8.基金项目
重庆市基础与前沿研究计划项目(cstc2013jcyjA80033)、2015年西南大学青年基金项目和2015年西南大学信豚基金项目共同资助[This work was supported by Basic and Advanced Research Projects in Chongqing (cstc2013jcyja80033),Youth Fund Project of Southwestern University in 2015,and Xintun Fund Project of Southwestern University in 2015]. （cstc2013jcyjA80033）
