The effects of dietary hydroalcoholic extract of honeybee pollen (HBPE) on growth performance, flesh quality, immunity and stress response were investigated. Two hundred fifty‐five rainbow trout (11.14 ± 1.06 g) were fed five diets containing increasing levels of HBPE: control, 0.25HBPE (0.25 g HBPE/kg), 0.5HBPE (0.5 g HBPE/kg), 1HBPE (1 g HBPE/kg) and 1.5HBPE (1.5 g HBPE/kg). After 56 days, rainbow trout fed the 0.5HBPE and 1HBPE diets displayed significantly higher weight gain (49.58 and 53.25 g) and protein efficiency (2.88 and 2.83) compared to those fed the control diet (4.89 and 2.05), respectively (p p p p Aeromonas hydrophila was exposed to different dosages of HBPE, a higher inhibitory zone resulted from 1,000 and 1,500 mg/ml dosage. The lower levels of plasma cortisol were observed in the 1HBPE and 1.5HBPE groups after the complement stress test. Collectively, the present findings suggest that the 1HBPE diet supported superior growth, flesh quality, immunity and stress response of rainbow trout.

中文翻译：

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蜜蜂花粉水醇提取物对虹鳟(Oncorhynchus mykiss)生长性能、肉质及免疫和应激反应的影响

研究了蜜蜂花粉（HBPE）的膳食水醇提取物对生长性能、肉质、免疫和应激反应的影响。给 255 条虹鳟鱼 (11.14 ± 1.06 g) 喂食 5 种 HBPE 含量不断增加的日粮：对照、0.25HBPE (0.25 g HBPE/kg)、0.5HBPE (0.5 g HBPE/kg)、1HBPE (1 g HBPE) /kg) 和 1.5HBPE (1.5 g HBPE/kg)。56 天后，饲喂 0.5HBPE 和 1HBPE 日粮的虹鳟鱼的体重增加（49.58 和 53.25 克）和蛋白质效率（2.88 和 2.83）分别显着高于对照日粮（4.89 和 2.05）（pppp 嗜水气单胞菌）暴露于不同剂量的 HBPE，1,000 和 1,500 mg/ml 剂量产生较高的抑制区。在 1HBPE 和 1 中观察到较低水平的血浆皮质醇。补体应激试验后的5HBPE组。总的来说，目前的研究结果表明，1HBPE 饮食支持虹鳟鱼的优异生长、肉质、免疫力和应激反应。