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Effects of dietary shrimp extract on growth performance, muscle fatty acid composition, and lipid metabolism‐related genes of juvenile red tilapia
Journal of the World Aquaculture Society ( IF 2.8 ) Pub Date : 2020-05-07 , DOI: 10.1111/jwas.12705
Zhen‐Zhen Yu 1 , Lan‐Mei Wang 2 , Fei‐Biao Song 3 , Wen‐Bin Zhu 2 , Ling‐Hong Miao 2 , Jian‐Jun Fu 2 , Zai‐Jie Dong 1, 2, 3
Affiliation  

Shrimp extract (ShE) is one kind of aquatic animal attractant with abundant amino acids. In order to investigate the effects of dietary ShE supplementation on the growth and muscle fatty acid of juvenile red tilapia (initial weight: 12.02 ± 0.02 g), a 62‐day experiment was conducted. The fish were fed six diets containing graded levels of ShE (0%, 0.5%, 1%, 2%, and 3%) without fish meal (FM) and an FM diet in triplicate groups. At the end of the experiment, the final body weight, weight gain, specific growth rate, and feed intake of the red tilapia fed the 3% ShE diet and FM diet were significantly higher than those fed the other diets (p < .05). The total saturated fatty acid of fish muscle in the ShE diet groups was lower than that in the FM diet group (p < .05). The contents of erucic acid (C22:1), eicosapentaenoic acid (C20:5 n‐3; EPA), docosapentanoic acid (C22:5 n‐3; DPA), and docosahexaenoic acid (C22:6 n‐3; DHA) in the ShE diet groups were also lower than those in the FM diet group (p < .05). The expression level of the lpl gene in red tilapia liver of experimental group was significantly higher than that of the control group (p < .05). The liver mdh gene mRNA expression levels were higher in the red tilapia fed 0.5%, 2%, and 3% ShE diets than those of other groups (p < .05). Moreover, the respiratory burst activity had a positive effect in the 0.5%, 1%, and 2% ShE diet groups (p < .05). Our results suggest that dietary ShE has a significant effect on the growth and lipid metabolism‐related genes of fish, and 3% ShE was recommended to be supplemented in juvenile red tilapia diets.

中文翻译:

日粮虾提取物对少年罗非鱼生长性能,肌肉脂肪酸组成和脂质代谢相关基因的影响

虾提取物(ShE)是一种氨基酸丰富的水生动物引诱剂。为了研究日粮ShE补充对少年红罗非鱼(初始重量:12.02±0.02 g)的生长和肌肉脂肪酸的影响,进行了62天的实验。一式三份,给这些鱼喂食六种日粮,这些日粮中含有不添加鱼粉(FM)和FM饮食的ShE分级水平(0%,0.5%,1%,2%和3%)。在实验结束时,饲喂3%ShE日粮和FM日粮的红罗非鱼的最终体重,体重增加,比生长率和采食量显着高于其他日粮(p  <.05) 。ShE饮食组鱼肉的总饱和脂肪酸低于FM饮食组(p <.05)。芥酸(C22:1),二十碳五烯酸(C20:5 n-3; EPA),二十二碳五烯酸(C22:5 n-3; DPA)和二十二碳六烯酸(C22:6 n-3; DHA)的含量ShE饮食组的饮食摄入量也低于FM饮食组的饮食(p  <.05)。实验组红色罗非鱼肝脏中lpl基因的表达水平明显高于对照组(p  <.05)。饲喂0.5%,2%和3%ShE的红罗非鱼的肝脏mdh基因mRNA表达水平高于其他组(p  <.05)。此外,在0.5%,1%和2%的ShE饮食组中,呼吸爆发活性具有积极作用(p <.05)。我们的结果表明,饮食中的ShE对鱼类的生长和脂质代谢相关基因具有显着影响,建议在幼年罗非鱼的日粮中添加3%ShE。
更新日期:2020-05-07
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