اثرات پربیوتیک گالاکتو الیگوساکارید جیره بر روی عملکرد رشد و مورفولوژی روده در ماهی قرمز (Carassius auratus gibelio)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه شیلات، دانشکده علوم کشاورزی و منابع طبیعی، دانشگاه گنبد کاووس، ایران

2 باشگاه پژوهشگران جوان و نخبگان، واحد اصفهان (خوراسگان)، دانشگاه آزاد اسلامی، اصفهان، ایران

3 گروه تولید و بهره برداری آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

4 گروه تکثیر و پرورش آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

چکیده

این مطالعه به منظور بررسی سطوح مختلف پربیوتیک گالاکتو الیگوساکارید بر شاخص‌های رشد و مورفولوژی روده ماهی قرمز (Carassius auratus gibelio) طراحی و اجرا گردید.بدین منظور تعداد 240 قطعه بچه ماهی با میانگین وزنی 28/0 ± 88/4 گرم به چهار گروه تقسیم شدند. گروه اول به عنوان شاهد با جیره پایه (فاقد گالاکتو الیگوساکارید)، گروه­های دوم، سوم و چهارم به ترتیب با جیره­های ‌حاوی 0، 5/0، 1 و 2 درصد گالاکتوالیگوساکارید به ازاء هر کیلوگرم جیره غذایی به مدت شش هفته تغذیه شدند. در انتهای آزمایش شاخص‌های ‌رشد (شامل وزن نهایی، ضریب رشد، ضریب تبدیل غذا) محاسبه گردید. علاوه براین از روده ماهیان قرمز نمونه­برداری به عمل آمد و میانگین طول‌، عرض و سطح جذب پرزهای روده در هر تیمار مورد بررسی قرار گرفت.نتایج نشان‌دهنده تاثیر‌معنی‌دار تیمار ‌2‌ درصد ‌گالاکتوالیگوساکارید بر افزایش‌ طول و عرض و سطح جذب پرز روده بود (05/0 p <). در حالیکه اختلاف معنی‌داری در شاخص‌های رشد مشاهده نشد. با توجه به تأثیر معنی‌دار پربیوتیک گالاکتو الیگوساکارید در افزایش ‌سطح ‌جذب روده ماهیان قرمز و هم‌چنین افزایش نسبی شا‌خص‌های رشد در ماهیان تغذیه شده با گالاکتو الیگوساکارید نسبت به تیمار شاهد، بنظرمی‌رسد این ماده می­تواند بعنوان یک عامل محرک رشد و تغذیه در جیره غذایی ماهیان قرمز زینتی مورد استفاده قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

The Prebiotic Effects of Diet Galactooligosaccharide on the Growth Performance and Intestinal Morphology of Carassius auratus gibelio

نویسندگان [English]

  • Hasan Sahraei 1
  • Ahmad Pirali 2
  • Fatemeh Ayatollahi 3
  • Shoeib Farvardin 4
  • Ali Akbar Hedayati 3
1 Department of Fisheries, Faculty of Natural Resources and Agriculture, Gonbad Kavous University, Gonbad Kavous, Iran
2 Young Researchers and Elite Club, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
3 Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
4 Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
چکیده [English]

The present study aimed to investigate the different levels of Galacto oligosaccharide prebiotic on growth performance and intestinal morphology of Carassius auratus gibelio. A number of 240 baby fish with the mean weight of 4.88 ±0.28 g were divided into four groups. The first group as the control was fed with basic diet (having no Galacto oligosaccharide) while the second, third, and fourth groups were fed with the diets containing 0, 0.5, 1 and 2 % Galacto oligosaccharide for six weeks. At the end of the test, the growth markers were calculated (including final weight, specific growth rate, and food conversion ratio). Then, intestinal biopsy was conducted and the mean length, width, and absorption surface of intestinal villus were measured in each treatment. The results indicated a significant effect of treatment with 2% Galacto oligosaccharide on villus length, width and absorption surface in Carassius auratus gibelio (P<0.05). However, no significant difference was found between treatments in terms of growth parameters. Due to the significant effect of Galactooligosaccharide prebiotic on the increase of absorption surface in Carassius auratus gibelio as well as the relative increase of growth parameters int he fish fed with Galacto oligosaccharide than the control treatment, it seems that this substance can be used as a suitable stimulating factor of growth and feeding in the diets of red ornamental fish.

کلیدواژه‌ها [English]

  • Prebiotic
  • growth
  • intestinal morphology
  • Galactooligosaccharide
  • Carassius auratus gibelio

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