水产营养 Aquaculture Nutrition

橡胶籽油替代鱼油对吉富罗非鱼幼鱼生长性能、消化酶活性、脂蛋白含量和抗氧化功能的影响

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  • 云南农业大学动物科学技术学院, 昆明 650201
张新党(1992-),女,河南开封人,硕士研究生,从事水产动物营养与饲料研究。E-mail:zxdang1108@163.com

收稿日期: 2017-09-04

  网络出版日期: 2018-03-05

基金资助

云南农业大学杰出人才专项(2015JY04);云南省淡水渔业产业技术体系专项(2017KJT0019);云南省应用基础研究面上项目(2014FB143);云南省科技创新强省计划(2014AB003)

Effects of Fish Oil Replacement by Rubber Seed Oil on Growth Performance, Digestive Enzyme Activity, Lipoprotein Content and Antioxidant Capacity of Juvenile Genetically Improved Farmed Tilapia (Oreochromis niloticus)

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  • College of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China

Received date: 2017-09-04

  Online published: 2018-03-05

摘要

本试验旨在研究橡胶籽油替代鱼油对吉富罗非鱼幼鱼生长性能、消化酶活性、脂蛋白含量和抗氧化功能的影响。选择大小均匀、体格健壮的吉富罗非鱼鱼苗600尾,随机分为5个组,每组3个重复,每个重复40尾鱼。5组试验鱼分别投喂以橡胶籽油分别替代0(对照)、25%、50%、75%和100%鱼油的5种等氮等能饲料,分别记为G0、G25、G50、G75、G100。试验期为8周。结果表明:1)橡胶籽油替代不同比例鱼油对罗非鱼幼鱼的末重、体增重、日增重系数、摄食率、饲料系数和蛋白质效率均无显著影响(P>0.05)。2)G25组罗非鱼幼鱼肠道胰蛋白酶和脂肪酶活性显著高于其他各组(P<0.05),G25组罗非鱼幼鱼肠道淀粉酶活性显著高于G75组(P<0.05)。橡胶籽油替代不同比例鱼油对罗非鱼幼鱼肝脏胰蛋白酶、淀粉酶和二糖酶活性均无显著影响(P>0.05)。3)随着橡胶籽油替代鱼油比例的提高,罗非鱼幼鱼血清总胆固醇(TC)和低密度脂蛋白胆固醇(LDL-C)含量大体上呈下降的趋势,肝脏游离胆固醇(FC)含量及FC/TC呈先下降后上升的趋势,其中以G25组最低。4)G0组罗非鱼幼鱼血浆谷胱甘肽还原酶(GR)活性显著高于其他各组(P<0.05),G0组罗非鱼幼鱼肝脏GR活性显著高于G50和G100组(P<0.05),G100组罗非鱼幼鱼肝脏总抗氧化能力显著低于其他各组(P<0.05)。由此可见,橡胶籽油替代25%~75%鱼油对罗非鱼幼鱼生长性能和抗氧化功能均无明显负面影响。橡胶籽油替代25%鱼油有利于改善罗非鱼幼鱼肠道消化酶活性;橡胶籽油替代100%鱼油时,罗非鱼幼鱼抗氧化功能下降。

本文引用格式

张新党, 张曦, 陶琳丽, 杨秀娟, 毕保良, 邓君明 . 橡胶籽油替代鱼油对吉富罗非鱼幼鱼生长性能、消化酶活性、脂蛋白含量和抗氧化功能的影响[J]. 动物营养学报, 2018 , 30(3) : 1007 -1018 . DOI: 10.3969/j.issn.1006-267x.2018.03.025

Abstract

This study was conducted to evaluate the effects of fish oil replacement by rubber seed oil on growth performance, digestive enzyme activity, lipoprotein content and antioxidant capacity of juvenile genetically improved farmed tilapia (GIFT) (Oreochromis niloticus). A total of 600 healthy juvenile GIFT with similar body weight were randomly divided into 5 groups with 3 replicates per group and 40 fish per replicate, and fed with their respective diet from the five isonitrogenous and isolipids diets, in which 0 (G0, as control), 25% (G25), 50% (G50), 75% (G75) and 100% (G100) fish oil were replaced with rubber seed oil in a basal diet. The experiment lasted for 8 weeks. The results showed as follows:1) there was no significant difference in final body weight, weight gain, daily gain coefficient, feeding rate, feed conversion rate and protein efficiency ratio of juvenile GIFT among all groups (P>0.05). 2) The activities of trypsin and lipase in intestine of juvenile GIFT in group G25 were significantly higher than those in the other groups (P<0.05), the intestinal amylase activity of juvenile GIFT in group G25 was significantly higher than that in group G75 (P<0.05). There was no significant difference in activities of trypsin, amylase and disaccharidase in liver of juvenile GIFT among all groups (P>0.05). 3) With the percentage of oil replacement by rubber seed oil increasing, the contents of total cholesterol (TC) and low density lipoprotein cholesterin (LDL-C) in serum of juvenile GIFT general showed a downward trend, and the liver free cholesterol (FC) content and FC/TC was firstly decreased and then increased, which group G25 got the lowest. 4) The plasma glutathione reductase (GR) activity of juvenile GIFT in group G0 was significantly higher than that in the other groups (P<0.05), the liver GR activity of juvenile GIFT in group G0 was significantly higher than that in groups G50 and G100 (P<0.05), and the liver total antioxidant capacity of juvenile GIFT in group G100 was significantly lower than that in the other groups (P<0.05). In summary, replacing 25% to 75% fish oil with rubber seed oil has no obvious negative effects on growth performance, and antioxidant capacity. 25% fish oil replacement by rubber seed oil is beneficial to improve the intestinal digestive enzyme activity of juvenile GIFT; when 100% fish oil replacement by rubber seed oil, the antioxidant capacity of juvenile GIFT is decreased.

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