Guz L, Oniszczuk T, Puk K, Oniszczuk A, Pastuszka A
Department of Biology and Fish Diseases, Faculty of Veterinary Medicine, University of Life Sciences, Akademicka 12, 20-950 Lublin, Poland.
Department of Thermal Technology and Food Process Engineering, University of Life Sciences, Głęboka 31, 20-612 Lublin, Poland.
Pol J Vet Sci. 2025 Jan;28(1):133-142. doi: 10.24425/pjvs.2025.154021.
This study was conducted to determine the effects of Echinacea purpurea (EP) root on the growth performance and some haematological parameters of juvenile common carp (Cyprinus carpio). Echinacea meal was incorporated into the diets as follows: no Echinacea meal (E-0), 5 g Echinacea meal kg-1 diet (E-5), 10 g Echinacea meal kg-1 diet (E-10) and 20 g Echinacea meal kg-1 diet (E-20). Triplicate groups of fish averaging 9.6 ± 0.5 g were hand-fed twice daily for 60 days. At the end of the feeding trial, weight gain (WG), feed conversion ratio (FCR), and specific growth rate (SGR) were significantly higher in fish fed the Echinacea-supplemented diets than in those fed the control diet. Red blood cell count (RBC) and white blood cell count (WBC) were significantly higher in the E-10 and E-20 groups than in the E-0 group. Fish fed the E-10 diet had the highest haematocrit (Hct), and haemoglobin (Hb) among all treatments. The nitroblue tetrazolium (NBT) assay showed a significant increase in the E-10 and E-20 groups compared to the E-0 and E-5 groups. After a 14-day challenge with Aeromonas hydrophila, Kaplan-Meier analysis revealed significant differences in survival between treatments. Survival of carp following the challenge was significantly higher in fish fed the E-10 and E-20 diets than in the E-0 group, whereas the E-5 group showed no significant difference compared to the E-0 group. In conclusion, our findings revealed that supplementing diets with EP root (10 g EP kg-1 and 20 g EP kg-1 diet) can enhance growth performance, haematological parameters, and resistance to A. hydrophila in juvenile common carp.
本研究旨在确定紫锥菊（EP）根对幼龄鲤鱼（鲤属鲤科）生长性能和一些血液学参数的影响。紫锥菊粉按以下方式添加到饲料中：不添加紫锥菊粉（E-0）、5克紫锥菊粉/千克饲料（E-5）、10克紫锥菊粉/千克饲料（E-10）和20克紫锥菊粉/千克饲料（E-20）。平均体重为9.6±0.5克的鱼分为三组，每组三个重复，每天人工投喂两次，持续60天。在饲养试验结束时，喂食添加紫锥菊饲料的鱼的体重增加（WG）、饲料转化率（FCR）和特定生长率（SGR）显著高于喂食对照饲料的鱼。E-10组和E-20组的红细胞计数（RBC）和白细胞计数（WBC）显著高于E-0组。在所有处理中，喂食E-10饲料的鱼的血细胞比容（Hct）和血红蛋白（Hb）最高。硝基蓝四氮唑（NBT）试验显示，与E-0组和E-5组相比，E-10组和E-20组有显著增加。在用嗜水气单胞菌攻击14天后，Kaplan-Meier分析显示各处理之间的存活率存在显著差异。攻击后，喂食E-10和E-20饲料的鲤鱼存活率显著高于E-0组，而E-5组与E-0组相比无显著差异。总之，我们的研究结果表明，在饲料中添加EP根（10克EP/千克饲料和20克EP/千克饲料）可以提高幼龄鲤鱼的生长性能、血液学参数以及对嗜水气单胞菌的抵抗力。
