The present study aimed at evaluating the influences of pomegranate peel meal on the growth performance, hematology, and blood biochemistry of rainbow trout. Fish were fed 5 varying levels of pomegranate peel meal (0%, 1%, 2 %, 3%, and 4%) for 60 days. The obtained results showed that weight gain was significantly higher in fish fed at the rate of 1% than the other groups, while specific growth rate (SGR) was significantly increased in fish fed 1% and followed by the ration of 2% (P<0.05). SGR of fish fed at the rate of 4% revealed the lowest value among the groups (P<0.05). However, feed conversion ratio displayed the lowest values in fish fed at the rate of 1% or 2%, while the highest value was observed in fish fed at the rate of 4% (P<0.05). The survival rate was increased by the rate of 1% in relation to the control without differences with the other groups (P<0.05). Red blood cells were significantly higher in fish fed at the rate of 0%, 1%, and 2% than fish fed at the rate of 3% and 4%. Hematocrit and hemoglobin levels were increased by feeding pomegranate meal at the rate of 1% compared to the other groups, while fish fed the control diet displayed higher Hb and HCT levels than fish fed at the rate of 2%, 3%, and 4% (P<0.05). White blood cells displayed significant differences among the groups and increased by increasing the level of pomegranate meal in the diet. The blood total protein was decreased in fish fed 2%, 3%, and 4% compared to fish fed at the rate of 0% and 1% of pomegranate meal. The glucose value displayed the highest level in fish fed at the rate of 3% of pomegranate meal compared to the other groups. The triglycerides were reduced by pomegranate meal at the rate of 2% than 3% and 4% without differences with the control and 1%. The blood total cholesterol was reduced in fish fed at the rate of 1% of pomegranate meal compared to the other groups (P<0.05). The blood IgM and complement components (C3 and C4) were increased by increasing the supplementation level of pomegranate meal with the highest value in fish fed at the rate of 3% (P<0.05). In conclusion, dietary pomegranate meal at the rate of 1% is recommended for enhancing the growth rate and health status of rainbow trout.

中文翻译：

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日粮石榴皮粉对虹鳟鱼生长性能，血液指标和先天免疫反应的影响

本研究旨在评估石榴皮粉对虹鳟鱼生长性能，血液学和血液生化的影响。为鱼喂食5种不同水平的石榴皮粉（0％，1％，2％，3％和4％），持续60天。获得的结果表明，以1％的比例饲喂的鱼的体重增加显着高于其他组，而以1％的比例饲喂的鱼的比重增长率（SGR）显着增加，随后的比例为2％（P < 0.05）。以4％的比率饲喂的鱼的SGR值在各组中最低（P <0.05）。但是，饲料转化率在以1％或2％的比例饲喂的鱼中显示最低值，而在以4％的比例饲喂的鱼中则显示最高值（P <0.05）。相对于对照组，存活率提高了1％，与其他组无差异（P <0.05）。以0％，1％和2％的比例喂养的鱼的红细胞明显高于以3％和4％的比例喂养的鱼的红细胞。与其他组相比，以石榴粉喂养率为1％时血细胞比容和血红蛋白水平增加，而以对照饮食喂养的鱼显示的Hb和HCT水平高于以2％，3％和4％喂养的鱼（P ＜0.05）。白细胞在各组之间显示出显着差异，并且通过增加饮食中的石榴粉水平而增加。与以石榴粉0％和1％的比例喂养的鱼相比，以2％，3％和4％喂养的鱼的血液总蛋白降低了。与其他组相比，在以石榴粉3％的比例喂养的鱼中，葡萄糖值最高。石榴粕使甘油三酸酯的还原率分别为3％和4％的2％，与对照组和1％的差异无差异。与其他组相比，饲喂石榴粉的鱼的血液中总胆固醇降低了1％（P <0.05）。通过以3％的比例饲喂鱼类中最高值的石榴粉补充水平，可以提高血液中的IgM和补体成分（C3和C4）（P <0.05）。总之，建议饮食中添加石榴粉1％，以提高虹鳟鱼的生长速度和健康状况。石榴粉降低甘油三酸酯的比例为2％，而不是3％和4％，与对照组和1％没有差异。与其他组相比，饲喂石榴粉的鱼的血液中总胆固醇降低了1％（P <0.05）。通过以3％的比例饲喂鱼类中最高值的石榴粉补充水平，可以增加血液IgM和补体成分（C3和C4）的含量（P <0.05）。总之，建议饮食中添加石榴粉1％，以提高虹鳟鱼的生长速度和健康状况。石榴粕使甘油三酸酯的还原率分别为3％和4％的2％，与对照组和1％的差异无差异。与其他组相比，饲喂石榴粉的鱼的血液中总胆固醇降低了1％（P <0.05）。通过以3％的比例饲喂鱼类中最高值的石榴粉补充水平，可以提高血液中的IgM和补体成分（C3和C4）（P <0.05）。总之，建议饮食中添加石榴粉1％，以提高虹鳟鱼的生长速度和健康状况。通过以3％的比例饲喂鱼类中最高值的石榴粉补充水平，可以增加血液IgM和补体成分（C3和C4）的含量（P <0.05）。总之，建议饮食中添加石榴粉1％，以提高虹鳟鱼的生长速度和健康状况。通过以3％的比例饲喂鱼类中最高值的石榴粉补充水平，可以增加血液IgM和补体成分（C3和C4）的含量（P <0.05）。总之，建议饮食中添加石榴粉1％，以提高虹鳟鱼的生长速度和健康状况。