Growth performance, antioxidant indexes, and the expression of genes were considerably promoted by dietary supplementation of alanyl-glutamine and vitamin E in juvenile marine medaka in seawater acidification by carbon dioxide

IF 2.3 3区 农林科学 Q2 FISHERIES
Weifeng Li, Youqing Xu, Fujuan Liu, Qian Zhang, Ni Tang, Yimin Zheng, Zhaokun Ding
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Abstract

The experiment was conducted to study the effect of different dietary supplementation of alanyl-glutamine dipeptide (AGD) and/or vitamin E (VE) on the growth performance, antioxidant indexes, and the expression of glutathione peroxidase (GPx) and peroxisome proliferator-activated receptor α (PPAR) genes in juvenile marine medaka (Oryzias melastigma) in seawater acidification. Seven groups of juvenile marine medaka in triplicate were studied in an ecosystem. One of them was in normal seawater (pH 8.1, pH control), and the others were in seawater acidification (pH 7.7) regulated by carbon dioxide (CO2). The juveniles were separately fed for 10 weeks using one of six different diets. The six diets were one control diet (basic feed) without supplements and the other diets with different amounts of additional AGD and/or VE. The juveniles were sampled randomly for analysis of a whole fish in week 0 and week 10. The results showed that different dietary supplementation of AGD and/or VE could considerably promote the growth performance, antioxidant indexes, and the expression of GPx and PPARα genes of juvenile marine medaka in seawater acidification. The optimal diet was D4, with additional AGD 5 g and VE 50 IU per kg of dried feed.

Abstract Image

在二氧化碳酸化环境下,饲粮中添加丙氨酰-谷氨酰胺和维生素E可显著促进藻幼鱼的生长性能、抗氧化指标和基因表达
本试验旨在研究在海水酸化条件下,饲粮中添加不同水平的丙氨酰-谷氨酰胺二肽(AGD)和/或维生素E (VE)对海鲂(Oryzias melastigma)幼鱼生长性能、抗氧化指标以及谷胱甘肽过氧化物酶(GPx)和过氧化物酶体增殖物激活受体α (PPARⱭ)基因表达的影响。在一个生态系统中研究了七组三复体的海洋medaka幼鱼。其中一组在正常海水(pH 8.1, pH控制)中,另一组在二氧化碳(CO2)调节的海水酸化(pH 7.7)中。这些幼鱼分别用六种不同的食物喂养10周。6种饲粮中,一种是不添加添加物的对照饲粮(基础饲料),另一种是添加不同数量的AGD和/或VE的饲粮。在第0周和第10周随机抽取幼鱼进行整鱼分析。结果表明,在海水酸化条件下,饲粮中添加不同水平的AGD和/或VE可显著提高海洋medaka幼鱼的生长性能、抗氧化指标以及GPx和PPARα基因的表达。最适日粮为D4,每kg干饲料添加AGD 5 g和VE 50 IU。
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来源期刊
CiteScore
5.90
自引率
7.10%
发文量
69
审稿时长
2 months
期刊介绍: The Journal of the World Aquaculture Society is an international scientific journal publishing original research on the culture of aquatic plants and animals including: Nutrition; Disease; Genetics and breeding; Physiology; Environmental quality; Culture systems engineering; Husbandry practices; Economics and marketing.
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