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首页> 外文期刊>Aquaculture International >Natural products as functional food ingredients for Nile tilapia challenged with Aeromonas hydrophila
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Natural products as functional food ingredients for Nile tilapia challenged with Aeromonas hydrophila

机译：天然产物作为尼罗河罗非鱼的功能性食品成分挑战Aeromonas患者

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Functional foods employ ingredients whose purpose is not necessarily to supply a possible nutritional deficiency, but rather to offer benefits to human and animal health. In this context, the present study aimed to investigate the use of oregano essential oil (OEO) and ethanolic extract of propolis (EEP) as functional foods for Nile tilapia challenged with Aeromonas hydrophila. Healthy fingerlings (7.67 +/- 0.86 g of mean initial weight) distributed in 60-L aquariums were used in the experiment, maintaining good water quality. The treatments consisted of 2.22 g of EEP kg feed(-1) (treatment 2), 0.5% OEO feed(-1) (treatment 3), and one control feed (treatment 1), with seven replications. After 30 days of feeding, the animals were subjected to sanitary challenges and observed for 15 days. Zootechnical, survival, and immunological parameters were analyzed, and the variability of intestinal microorganisms was evaluated through denaturing gradient gel electrophoresis (DGGE). The results of this study showed that tilapia fed with feed containing OEO or EEP significantly improved growth parameters compared with the control group, obtaining respective mean values for the control treatment, EEP and OEO: final weight (20.38 +/- 1.6b; 23.15 +/- 2.07a; 24.31 +/- 1.43a), weight gain (12.66 +/- 1.67b; 15.5 +/- 2.04a; 16.65 +/- 1.45a), and body condition (1.66 +/- 0.06b; 1.8 +/- 0.12a; 1.82 +/- 0.11 The). In addition, the addition of OEO effectively improved carcass traits as well as apparent feed conversion (1.91 +/- 0.19b; 1.69 +/- 0.22ab; 1.45 +/- 0.22a) and feed efficiency (0.56 +/- 0.05b; 0.63 +/- 0.07ab; 0.73 +/- 0.13a) compared with the control group (P < 0.05). The two natural additives showed no significant effect on fish immunity, survival parameters after challenge, and hepatosomatic index. However, they presented an effect as growth promoters and on the intestinal microbiome; in the latter, there was an increase in diversity when compared with the control group. It may be concluded that OEO and EEP natural additives can act as growth promoters.
机译：功能性食品采用其目的不一定提供可能的营养缺乏的成分，而是为人类和动物健康提供益处。在这种情况下，本研究旨在调查蜂孔（EEP）的牛油精油（OEO）和乙醇提取物作为尼罗罗非鱼的功能食品挑战Aeromonas患有肺泡。在实验中使用了分布在60-L水族馆中的健康的鱼片（7.67 +/- 0.86克的平均初始重量），保持良好的水质。该治疗由2.22g EEP kg饲料（-1）（处理2），0.5％Oeo Feed（-1）（治疗3），一种对照饲料（治疗1），具有七种复制。喂养30天后，对动物进行卫生挑战，并观察到15天。分析ZooteChnical，Survival和免疫学参数，通过变性梯度凝胶电泳（DGGE）评价肠道微生物的可变性。该研究的结果表明，与对照组相比，罗非鱼喂食含有OEO或EEP的饲料显着改善的生长参数，获得对照治疗，EEP和OEO的相应平均值：最终体重（20.38 +/- 1.6b; 23.15 + / - 2.07a; 24.31 +/- 1.43a），体重增加（12.66 +/- 1.67b; 15.5 +/- 2.04a; 16.65 +/- 1.45a）和身体状况（1.66 +/- 0.06b; 1.8 +/- 0.12a; 1.82 +/- 0.11）。此外，加入OEO有效改善了胴体性状和表观进料转化（1.91 +/- 0.19b; 1.69 +/- 0.22ab; 1.45 +/- 0.22a）和饲料效率（0.56 +/- 0.05b; 0.63 +/- 0.07ab; 0.73 +/- 0.13A）与对照组相比（P <0.05）。两种天然添加剂对鱼类免疫，攻击后生存参数和肝动物指数没有显着影响。然而，它们呈现为生长启动子和肠道微生物组的效果;在后者，与对照组相比，多样性的增加。可以得出结论，OEO和EEP天然添加剂可以充当生长启动子。

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