Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
Aquaculture Department, Faculty of Marine Sciences, Tarbiat Modares University, Noor, Iran.
Fish Shellfish Immunol. 2020 Apr;99:267-273. doi: 10.1016/j.fsi.2020.01.032. Epub 2020 Jan 22.
The present study was designed to investigate the dietary effects of ginger extract (Zingiber officinale) on common carp (Cyprinus carpio). Three hundred and sixty fish weighing 10.9 ± 0.17 g were randomly divided into four experimental treatments in triplicates. Four experimental diets were designed containing different inclusion levels of ginger extract as 0% (control), 0.1%, 0.2%, and 0.4% named T1, T2, T3, and T4, respectively, and fish were fed 3% of body weight daily for 60 days. Feed conversion ratio, weight gain, and specific growth rate parameters were measured higher in the groups fed with ginger extract compared to the control, especially in T3 (P < 0.05). Also, fish treated with ginger extract showed lower carcass moisture and lipid, but higher protein contents compared to the control. The results showed significant increase in the number of erythrocytes and leucocytes, as well as the level of hematocrit and hemoglobin in fish fed with supplemented diets. In addition, significant enhancement was observed in cases of serum parameters, including total protein, albumin, globulin, lysozyme, superoxide dismutase, catalase, and total immunoglobulins in T3 and T4 compared to the control. The lowest serum cortisol level was noticed in T3. Furthermore, the T3 group showed the highest activities of skin mucus lysozyme, alkaline phosphatase, and protease (P < 0.05). In conclusion, the present results demonstrated that Zingiber officinale extract at a 0.2% level can effectively improve the growth and health status of Common Carp (Cyprinus carpio).
本研究旨在探讨姜提取物（Zingiber officinale）对鲤鱼（Cyprinus carpio）的饮食影响。将 360 条重 10.9±0.17g 的鱼随机分为四组，每组 3 个重复。设计了四种含有不同姜提取物水平的实验饲料，分别为 0%（对照）、0.1%、0.2%和 0.4%，命名为 T1、T2、T3 和 T4，鱼每天喂养体重的 3%，持续 60 天。与对照组相比，喂食姜提取物的各组的饲料转化率、体重增加和特定生长率参数更高，特别是在 T3 组（P<0.05）。此外，与对照组相比，用姜提取物处理的鱼的体腔水分和脂质含量较低，但蛋白质含量较高。结果表明，喂食补充饲料的鱼的红细胞和白细胞数量以及血细胞比容和血红蛋白水平显著增加。此外，与对照组相比，T3 和 T4 组的血清参数（包括总蛋白、白蛋白、球蛋白、溶菌酶、超氧化物歧化酶、过氧化氢酶和总免疫球蛋白）显著提高。T3 组的血清皮质醇水平最低。此外，T3 组的皮肤黏液溶菌酶、碱性磷酸酶和蛋白酶活性最高（P<0.05）。总之，本研究结果表明，0.2%水平的姜提取物可以有效提高鲤鱼的生长和健康状况。
