16 اردیبهشت 1403

مژگان مظهری

مرتبه علمی: دانشیار
نشانی: جیرفت، کیلومتر 8 جاده بندر عباس، دانشگاه جیرفت کد پستی: 7867161167
تحصیلات: دکترای تخصصی / تغذیه طیور
تلفن: 09131991972
دانشکده: دانشکده کشاورزی

مشخصات پژوهش

عنوان
Effect of Epinephrine and Bromocriptine on Ovary Folliculogenesis and Productive Traits of Laying Hens
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
bromocriptine, egg production, epinephrine, laying hens, ovarian follicles
پژوهشگران یداله بدخشان، مژگان مظهری

چکیده

An experiment was conducted to study the effect of Epinephrine (EP) and bromocriptine (BR) on produc-tive traits of laying hens. Thirty White Leghorn hens, 50 weeks old, were divided into three equal treat-ments (with 10 hens for each treatment): control, physiological serum (0.5 mL/hen/week), EP (0.5 mL/hen/week) and BR (100 g/kg of body weight (BW); w/v in absolute alcohol). Hens were injected once a week for 10 weeks. At the end of the experimental period, all hens were killed by decapitation. Ovaries, oviducts and ovarian follicles were examined. Ovary folliculogenesis was affected (P<0.01) by EP and BR treatments. There were larger yellow follicle (LYF), smaller yellow follicle (SYF) and larger white follicle in EP and BR treated hens compared to control group respectively. EP and BR treatments shortened total pause length compared to control (P<0.01). Mean weekly egg production was higher (P<0.01) for treated hens with BR and EP compared to control group. Percentage of weekly egg production was higher (P<0.01) in treated birds compared to control group. It can be concluded that EP and BR may promote ovarian fol-licular development and stimulate ovulation in laying hens at the end of their reproductive cycle.