تأثیر جایگزینی روغن ماهی با روغن‌های گیاهی در توسعة گناد و تغییرات سطح برخی هورمون‌های جنسی ماهی قزل‌آلای رنگین‌کمان ماده (Oncorhynchus mykiss)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی منابع ‌طبیعی- شیلات دانشگاه تهران، ایران،

2 استاد گروه شیلات دانشکدة منابع ‌طبیعی دانشگاه تهران، ایران،

3 استاد گروه شیلات دانشکدة منابع طبیعی دانشگاه تهران، ایران،

4 دانشیار گروه شیلات دانشکدة منابع طبیعی دانشگاه تهران، ایران

5 کارشناس ارشد مهندسی منابع‌ طبیعی- شیلات دانشگاه تهران، ایران

چکیده

چکیده
به منظور بررسی تأثیر جیره‌های غذایی حاوی روغن‌های مختلف گیاهی در رشد تخمدان و میزان ترشح هورمون‌های جنسی در ماهی قزل‌آلای رنگین‌کمان (Oncorhynchus mykiss)، چهار جیرة آزمایشی بر پایة 15% چربی فرموله شد. در تیمار شاهد 100% روغن مورد استفاده روغن ماهی بود و در تیمار‌های اول، دوم و سوم از 25% روغن ماهی و به ترتیب 75% روغن سویا، کانولا و کتان استفاده شد. آزمایش به صورت طرح کاملاً تصادفی در چهار تیمار و سه تکرار طراحی شد. پس از شش هفته تغذیة ماهیان با وزن متوسط 5/2 ±200 گرم، بافت تخمدان و میزان هورمون‌های استروئیدی (تستسترون، 17-بتا استرادیول و پروژسترون) ارزیابی شدند. میزان توسعة بافت تخمدان همچنین میزان هورمون‌های تستسترون و 17-بتا استرادیول در تیمار اول به طور معنی‌داری بیش‌تر از سایر تیمار‌ها بود (05/0 > P)، در حالی که میزان هورمون پروژسترون در بین تمام تیمارها و تیمار شاهد اختلاف معنی‌داری را نشان نداد. با توجه به مطالب ارائه‌شده، روغن سویا به‌منزلة بهترین روغن در جیرة غذایی ماهی قزل‌آلای رنگین‌کمان برای توسعة بافت تخمدان و افزایش میزان هورمون‌های جنسی پیشنهاد می‌شود.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of replacement of vegetable oils with fish oil on gonadal development and sex steroid hormones in female rainbow trout (Oncorhynchus mykiss)

نویسندگان [English]

  • Seyede Marzieh Hoseini khah 1
  • Bager Mojazi amiri 2
  • Golam reza Rafiee 3
  • Mehrdad Farhangi 4
  • Seyed Mahya Moosavi 5
1 MSc. Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
2 Prof. Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
3 Prof. Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
4 Associate Prof. Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
5 MSc. Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

To study the effect of dietary animal and plant lipids on gonadal differents and sex steroid hormones levels of blood in rainbow trout (Oncorhynchus mykiss), the four diets was formulated based on 15% fat. The control uses 100% oil, fish oil was treated in the first, second and third respectively 25% and 75% fish oil, soybean oil, canola and cotton were used. After six weeks of feeding fish with average weight 200±2.5 (g), ovarian tissue and sex steroid hormones levels of blood (Testosterone, Progesterone, 17β-Estradiol) were evaluated. Development of ovarian tissue as well as the hormones testosterone and 17β- Estradiol in the first treatment was significantly greater than other treatments (P<0.05), while progesterone hormone between different treatments and control treatments did not show significant difference. According to the presented study, the best oils in diets for rainbow trout ovarian tissue development and increased levels of see steroid hormones, soybean oil is suggested.
 
 
 

کلیدواژه‌ها [English]

  • Replace of vegetable oils
  • sex steroid hormones
  • Rainbow trout
  • Ovarian tissue

 

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