水产营养 Aquaculture Nutrition

饲料脂肪水平对大鳞副泥鳅幼鱼生长性能、消化酶活性及抗氧化能力的影响

  • 曾本和 ,
  • 廖增艳 ,
  • 吴双 ,
  • 赵杰锌 ,
  • 向枭 ,
  • 王强
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  • 西南大学荣昌校区水产系, 淡水鱼类资源与生殖发育教育部重点实验室, 水产科学重庆市市级重点实验室, 重庆 402460

收稿日期: 2015-11-15

  网络出版日期: 2016-04-11

基金资助

重庆市基础与前沿研究计划项目(cstc2013jcyjA80033);西南大学青年基金资助;西南大学信豚水产学生创新基金

Effects of Dietary Lipid Level on Growth Performance, Digestive Enzyme Activities and Antioxidant Ability of Juvenile Paramisgurnus dabryanus

  • ZENG Benhe ,
  • LIAO Zengyan ,
  • WU Shuang ,
  • ZHAO Jiexin ,
  • XIANG Xiao ,
  • WANG Qiang
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  • Key Laboratory of Aquatic Science of Chongqing, Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, Department of Fisheries in Rongchang Compust, Southwest University, Chongqing 402460, China

Received date: 2015-11-15

  Online published: 2016-04-11

摘要

本试验旨在研究饲料脂肪水平对大鳞副泥鳅幼鱼生长性能、消化酶活性及抗氧化能力的影响。选用初始体重为(0.15±0.01) g的大鳞副泥鳅幼鱼1620尾,随机分成6组,每组3个重复,每个重复90尾鱼,分别投喂脂肪水平为2.50%、4.49%、6.48%、8.47%、10.46%和12.45%的试验饲料,养殖时间为60 d。结果表明:大鳞副泥鳅幼鱼的特定生长率(SGR)在饲料脂肪水平为8.47%时最高,为4.99%/d,除与10.46%组差异不显著(P>0.05)外,显著高于其余各试验组(P<0.05);饲料系数(FCR)在饲料脂肪水平为8.47%时最低,为1.09,除与10.46%组差异不显著(P>0.05)外,显著低于其余各试验组(P<0.05)。通过二次多项式回归分析可知,大鳞副泥鳅幼鱼SGR、FCR最优时饲料脂肪水平分别为9.18%、9.00%。随着饲料脂肪水平的升高,大鳞副泥鳅幼鱼肝胰脏及前肠蛋白酶、脂肪酶活性均呈先升高后降低的变化趋势,且均在8.47%组达到最高值,除与10.46%组差异不显著(P>0.05)外,显著高于其余各试验组(P<0.05);肝胰脏和前肠淀粉酶的活性则呈先下降后逐渐趋于稳定的趋势。随着饲料脂肪水平的升高,肝胰脏超氧化物歧化酶、过氧化氢酶活性均呈先升高后降低的变化趋势,且均在8.47%组达到最高值,除与10.46%组差异不显著(P>0.05)外,显著高于其余各试验组(P<0.05)。由此得出,适宜的饲料脂肪水平可促进大鳞副泥鳅幼鱼的生长,提高其蛋白酶与脂肪酶活性和抗氧化能力。本试验条件下,综合考虑大鳞副泥鳅幼鱼生长性能、消化酶活性和抗氧化能力,其饲料的适宜脂肪水平为8.47%~10.46%。

本文引用格式

曾本和 , 廖增艳 , 吴双 , 赵杰锌 , 向枭 , 王强 . 饲料脂肪水平对大鳞副泥鳅幼鱼生长性能、消化酶活性及抗氧化能力的影响[J]. 动物营养学报, 2016 , 28(4) : 1105 -1113 . DOI: 10.3969/j.issn.1006-267x.2016.04.019

Abstract

This experiment was aimed to investigate the effects of dietary lipid level on growth performance, digestive enzyme activities and antioxidant ability of juvenile Paramisgurnus dabryanus. Six diets were formulated by containing 2.50%, 4.49%, 6.48%, 8.47%, 10.46% and 12.45% lipid, respectively. A total of 1620 juvenile Paramisgurnus dabryanus with an initial body weight of(0.15±0.01) g were randomly divided into 6 groups with 3 replicates per group and 90 fish per replicate. Each diet was fed one group of 90 fish for 60 d. The results showed that specific growth rate(SGR) had the highest value(4.99%/d) when the dietary lipid level was 8.47%, and it was significantly higher than that in other experimental groups(P<0.05) except the 10.46% group(P>0.05); feed conversion ratio(FCR) had the lowest value(1.09) when the dietary lipid level was 8.47%, and it was significantly lower than that in other experimental groups(P<0.05) except the 10.46% group(P>0.05). By quadratic polynomial regression analysis, dietary lipid levels were 9.18% and 9.00% when the juvenile Paramisgurnus dabryanus had the optimal SGR and FCR, respectively. With the dietary lipid level increasing, the hepatopancreas and foregut protease and lipase activities of fish were increased at first and then decreased, and all them had the highest values when the dietary lipid level was 8.47%, which were significantly higher than those in other experimental groups(P<0.05) except the 10.46% group(P>0.05); the amylase activities in hepatopancreas and foregut were decreased at first and then tend to stabilized. Both of the superoxide dismutase(SOD) and catalase(CAT) activities in hepatopancreas were increased at first and then decreased with the dietary lipid level increasing, and all them had the highest values when the dietary lipid level was 8.47%, which were significantly higher than those in other experimental groups(P<0.05) except the 10.46% group(P>0.05). Above results show that suitable dietary lipid level can improve the growth, protease and lipase activities and antioxidant ability of juvenile Paramisgurnus dabryanus. We suggest that the optimal dietary lipid level for juvenile Paramisgurnus dabryanus is 8.47% to 10.46% through comprehensive analysis of growth performance, digestive enzyme activities and antioxidant ability.

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