Poultry Production Department, Faculty of Agriculture, Alexandria University, Alexandria, Egypt.
Anim Reprod Sci. 2010 Aug;121(1-2):174-80. doi: 10.1016/j.anireprosci.2010.05.008. Epub 2010 May 20.
Exposure of male rabbits to heat stress during summer adversely affects their fertility leading to major production losses. A total number of 24 male rabbits were randomly divided into four experimental groups exposed to temperatures ranging from a high of 32 degrees C to a low of 23 degrees C. Animals of the 2nd, 3rd and 4th group were individually orally given 200, 400, or 800 mg royal jelly (RJ)/kg body weight once a week to evaluate the ability of RJ feeding to counteract "summer infertility" in bucks and enhance their physiological status. Royal jelly treatments significantly boosted testosterone level to 133, 143 and 124% of basal, increased ejaculated volume by 36, 31 and 18%, increased seminal plasma fructose to 122, 124, and 111%, improved sperm motility by 15, 18 and 5%, increase sperm total output by 65, 63 and 35%, reduced abnormal sperm by 24, 24 and 15% and dead sperm by 27, 25 and 17% compared to the heat stressed control animals. Serum total protein, albumin and globulin increased while serum total lipids, cholesterol and triglycerides decreased with RJ treatments. Creatinine was reduced by 5, 13 and 8% and uric acid by 4, 7 and 4%, respectively for the three doses of RJ compared to control. Alkaline phosphatase has significantly increased to reach 114, 118, and 108% of heat stressed level with the three doses of RJ, indicating the occurrence of active bone deposition. Glucose level increased significantly to reach 105, 112, and 116% of heat stressed control and both calcium and phosphorus increased significantly with RJ treatments. It was concluded that royal jelly administration to heat stressed male rabbits can counteract their "summer infertility" and improve their physiological status.
在夏季，雄性兔子暴露在热应激下会对其生育能力产生不利影响，导致重大的生产损失。总共 24 只雄性兔子被随机分为四组，分别暴露在从 32 度到 23 度的温度中。第二、第三和第四组的动物分别每周口服 200、400 或 800 毫克蜂王浆（RJ）/公斤体重，以评估 RJ 喂养对雄鹿“夏季不育”的能力，增强其生理状态。RJ 处理显著提高了睾丸激素水平，基础水平提高了 133%、143%和 124%，射精量增加了 36%、31%和 18%，精液果糖增加了 122%、124%和 111%，精子活力提高了 15%、18%和 5%，精子总输出量增加了 65%、63%和 35%，异常精子减少了 24%、24%和 15%，死精子减少了 27%、25%和 17%。与热应激对照组相比，血清总蛋白、白蛋白和球蛋白增加，血清总脂质、胆固醇和甘油三酯减少。与对照组相比，三种剂量的 RJ 使肌酐降低了 5%、13%和 8%，尿酸降低了 4%、7%和 4%。与热应激对照组相比，碱性磷酸酶显著升高，达到 114%、118%和 108%，表明发生了活跃的骨沉积。血糖水平显著升高，达到热应激对照组的 105%、112%和 116%，钙和磷水平也显著升高。综上所述，给热应激的雄性兔子服用蜂王浆可以对抗其“夏季不育”，改善其生理状态。
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