اثرات کوتاه و بلند مدت اسفنج MAP بر عملکرد تولید مثلی میش‌های عربی در خارج از فصل تولید مثل

Subject Areas : Camel

P. Sareminejad ¹ ( Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran )
S. Tabatabaei ² ( Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran )
M. Mamouei ³ ( Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran )
K. Mirzadeh ⁴ ( Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran )
M. Boujarpour ⁵ ( Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran )

Received: 2013-12-07 Accepted : 2014-02-15 Published : 2014-12-01

Keywords: میش عربی, اسفنج مدروکسی پروژسترون استات, فصل غیر تولیدمثل, عملکرد تولید مثلی,

Abstract :

هدف از این مطالعه، بررسی راندمان تولید مثل درمان‌های کوتاه و بلند مدت پروژسترونی به همراه هورمون PMSG در میش‌های عربی در خارج از فصل تولید مثل بود. در مجموع 56 رأس گوسفند ماده به سه گروه تقسیم شدند. در گروه اول، اسفنج داخل واژنی (60 میلی‌گرم مدروکسی پروژسترون استات، MAP) به مدت 6 روز در داخل واژن باقی ماند، در گروه دوم، اسفج مدروکسی پروژسترون استات به مدت 14 روز در واژن باقی ماند و گروه سوم، نیز به عنوان گروه کنترل در نظر گرفته شد. به دو گروه اول، پس از برداشت اسفنج میزان 600 واحد بین المللی (IU) هورمون PMSG به صورت عضلانی تزریق شد. پارامترهایی از جمله، میزان پاسخ فحلی، مدت فحلی، میزان آبستنی و میزان تزاید بین گروه‌ها مورد ارزیابی قرار گرفت. تفاوت معنی‌داری در میزان پاسخ فحلی و میزان تزاید بین دو گروه اول و دوم وجود نداشت (05/0<P). با این حال، دو گروه درمانی در مقایسه با گروه کنترل تفاوت معنی‌داری داشتند. در گروه اول، طول مدت فحلی به طور قابل توجهی بیشتر از گروه دوم بود (05/0>P). علاوه بر این، میزان آبستنی نیز در گروه اول به طور معنی‌داری بالاتر از گروه دوم بود (05/0>P). نتیجه‌گیری شد که درمان کوتاه مدت اسفنج (6 روز) در مقایسه با درمان بلند مدت (14 روز) در میش‌های عربی عملکرد بهتری دارد 

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