Abstract

In this study, we examined changes occurred in blood parameters, immune responses, antioxidant enzyme activities, and growth performance of rainbow trout (Oncorhynchus mykiss) administered with ribwort plantain (RP) through feed. Fish (mean weight 36.56 ± 1.99 g) were fed a diet supplemented with an aqueous methanolic extract of RP at variable doses, 0 (control), 1 (RP1), 2 (RP2), and 3 g kg⁻¹ (RP3) for 90 days. The final weight, weight gain, and specific growth rate were significantly increased in RP1, RP2, and RP3 treatment groups compared to that of the control. Among examined blood parameters, hemoglobin value in RP1 group (9.77 ± 0.10 g dl⁻¹) only was significantly high on the 30th day of the study. When immune response parameters were evaluated, we observed that oxidative radical production and lysozyme activities were affected positively in experimental groups (P < 0.05). The highest oxidative radical production was determined in fish of RP3 group. Glutathione peroxidase and glucose 6 phosphate dehydrogenase were increased in RP3 group compared to control and other treatment groups. Based on these results, it is concluded that ribwort plantain promotes growth, enhances immune responses and antioxidant enzyme activities in rainbow trout, and therefore, may be used in aquaculture.

中文翻译：

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车前子车前子提取物对虹鳟鱼（Oncorhynchus mykiss）的血液参数，免疫反应，抗氧化酶活性和生长性能的影响。

摘要

在这项研究中，我们检查了通过饲料饲喂核仁大蕉（RP）的虹鳟鱼（Oncorhynchus mykiss）的血液参数，免疫反应，抗氧化酶活性和生长性能的变化。向鱼（平均体重36.56±1.99 g）饲喂补充了可变剂量RP甲醇水提取物的日粮，其中0（对照），1（RP1），2（RP2）和3 g kg ^-1（RP3）用于90天。与对照组相比，RP1，RP2和RP3治疗组的最终体重，体重增加和比增长率显着增加。在检查的血液参数中，RP1组的血红蛋白值（9.77±0.10 g dl ^-1）仅在研究的第30天显着升高。当评估免疫反应参数时，我们观察到实验组中的氧化自由基产生和溶菌酶活性受到正向影响（P  <0.05）。RP3组鱼中最高的氧化自由基产生被确定。与对照组和其他治疗组相比，RP3组的谷胱甘肽过氧化物酶和葡萄糖6磷酸脱氢酶增加。基于这些结果，得出结论，核仁大蕉促进虹鳟的生长，增强其免疫反应和抗氧化酶活性，因此可用于水产养殖。