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بررسی تغییرات غلظت هورمون ملاتونین تحت اثر سن و فصل در نریان عرب | ||
پژوهش های علوم دامی (دانش کشاورزی) | ||
مقاله 1، دوره 27، شماره 4، اسفند 1396، صفحه 1-10 اصل مقاله (1.02 M) | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
خلیل میرزاده؛ عارف مداحی* ؛ مرتضی ممویی؛ حسین نجفزادهورزی | ||
گروه علوم دامی دانشگاه کشاورزی و منابع طبیعی رامین خوزستان | ||
چکیده | ||
زمینهمطالعاتی: هورمون ملاتونین به عنوان هورمون فتوپریودیک نقش بسزایی در فعالیت تولیدمثلی حیوانات مزرعهای، از جمله نریان دارد. هدف: این آزمایش به منظور بررسی تغییرات غلظت هورمون ملاتونین در سه رده سنی 2 تا 6، 6 تا 10 و 10 تا 14 سال، تحت فتوپریود طبیعی در منطقه دزفول بود. روشکار: خونگیری از ورید وداج 33 رأس نریان اصیل عرب، در فصول تابستان (تیرماه) و زمستان (دیماه) سال 1391 انجام شد. غلظت هورمون ملاتونین با دستگاه HPLC اندازهگیری شد. مقایسه فراسنجه مذکور بین فصول تابستان و زمستان توسط آزمون T و تفاوت آنها در دو فصل، در سه رده سنی با تجزیه واریانس (ANOVA) یکطرفه و آزمون چند دامنهای دانکن با استفاده از برنامه نرم افزار SPSS مورد آنالیز قرار گرفت. نتایج: میانگین غلظت ملاتونین سرم خون بین فصول تابستان و زمستان دارای تفاوت آماری معنیداری نمیباشد (05/0P>). در هر دو فصل میانگین غلظت ملاتونین در نریانهای 2 تا 6 ساله به صورت معنیداری بیشتر از 6 تا 10 و 10 تا 14 سالهها بود (05/0P<). نتیجهگیری نهایی: نتایج نشان داد که در نریان عرب، فصل تأثیری بر غلظت ملاتونین سرم خون ندارد ولی با افزایش سن غلظت ملاتونین کاهش مییابد. | ||
کلیدواژهها | ||
سن؛ فصل؛ ملاتونین؛ نریان عرب | ||
مراجع | ||
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