بررسی اثر سطوح مختلف اسید فولیک بر عملکرد رشد، ترکیب لاشه و شاخص های خونی بچه فیل ماهیان انگشت قد (Huso huso Linnaeus 1758)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیلات، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان، ایران

2 پژوهشکده آبزی پروری آب های داخلی، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، بندرانزلی، ایران

3 گروه تخصصی شیلات و آبزیان، موسسه آموزش و ترویج کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

اسید فولیک نقش اساسی در ارتقاء ایمنی آبزیان ایفا می‏ کند. به منظور بررسی اثر رژیم غذایی اسید فولیک بر عملکرد رشد، ترکیبات لاشه، پارامترهای خونی از 270 عدد بچه فیل ماهی (Huso huso) انگشت قد با میانگین وزنی 8-5 گرم با سطوح مختلف اسید فولیک شامل: 0/6 میلی ­گرم در کیلوگرم (تیمار شاهد 1)، 2/68 میلی ­گرم در کیلوگرم (تیمار 2)، 3/72 میلی ­گرم در کیلوگرم (تیمار3) و 4/84 میلی ­گرم در کیلوگرم (تیمار4)، با سه تکرار به مدت 56 روز استفاده شد. اثر تیمارهای آزمایشی بر عملکرد رشد و شاخص های ایمنی بررسی گردید. نتایج نشان داد؛ اثر تیمارهای آزمایشی بر ضریب تبدیل خوراک، نرخ رشد ویژه، بازده خوراک و افزایش وزن معنی ­داری بود (0/05>P). سطوح مختلف اسیدفولیک بر تعداد گلبول های سفید نیز اختلاف معنی داری ایجاد نمود (0/05>P)؛ به طوری که کم ترین مقدار آن در تیمار شاهد به میزان 3 10×mm-3  62/4 و بیش ترین آن به میزان  103×mm-3  75/6 در تیمار چهارم مشاهده شد. تعداد لنفوسیت ها در بین گروه های آزمایشی اختلاف معنی دار داشت (0/05>P) ولی اختلاف معنی داری در تعداد نوتروفیل ها دیده نشد (0/05<P). پس از آنالیز لاشه، همان طور که انتظار می رفت افزایش سطح اسیدفولیک جیره سبب افزایش معنی دار درصد پروتیین خام در لاشه گردید (0/05>P). به طوری که بیش ترین مقدار درصد پروتیین خام در تیمار سوم به میزان 2/13 مشهود بود. شاخص های رطوب، چربی و خاکستر لاشه به طور معنی داری تحت تاثیر تیمارهای ازمایشی قرار نگرفتند. یافته‌های این آزمایش نشان داد که با افزایش میزان اسیدفولیک به میزان 3/72 میلی گرم در کیلوگرم درجیره، ماهی ها مقاومت بهتری از نظر ایمنی و عملکرد رشد از خود نشان خواهند داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of different levels of folic acid on growth performance and blood indexes of Beluga fingerling (Huso huso Linnaeus 1758)

نویسندگان [English]

  • Ataollah Yeganehkari 1
  • Hadi Ershad Langroudi 1
  • Alireza Valipour 2
  • Soheil Alinejad 3
1 Department of fisheries, Lahijan Branch, Islamic Azad University, Lahijan, Iran
2 Inland Waters Aquaculture Research Center, Iranian Fisheries Science Research Institute, Agriculture Research Education and Organization (AREEO), Bandar Anzali, Iran
3 Department of Fisheries and Aquatic, Institute of Agricultural Education and Extension, Agriculture Research Education and Organization (AREEO), Tehran, Iran
چکیده [English]

Folic acid plays an essential role in promoting aquatic immune. In order to investigate the effect of folic acid diet on growth performance, carcass composition, blood parameters of 270 beluga fingerling with an average weight of 5-8 g with different levels of folic acid, including: 0.6 (as a control), 2.68, 3.72 and 4.84 mg/kg with three replications for 56 days were considered. The effect of experimental treatments on growth performance and immune indices was investigated. Results showed that the effect of treatments on feed conversion, specific growth rate, feed efficiency and weight gain was significant (P<0.05). Different levels of folic acid also made a significant difference in the number of white blood cells (P<0.05); So that the lowest value in the control treatment was 4.62 mg/kg and the highest was 6.75 mg/kg in the fourth treatment. There was a significant difference in the number of lymphocytes between the experimental groups, but no significant difference was observed in the number of neutrophils. After carcass analysis, as expected, increasing dietary folic acid level caused a significant increase in the percentage of crude protein in the carcass. So that the highest percentage of crude protein in the third treatment was 2.13 mg/kg. Moisture, fat and ash carcass indices were not significantly affected by experimental treatments. The results of this experiment showed that by increasing the amount of folic acid by 3.72 mg/kg, the fish will show better resistance in terms of immune and growth performance.

کلیدواژه‌ها [English]

  • Folic acid
  • Blood serum
  • Growth function
  • Immunity index
  • Beluga
  • Huso huso

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فصلنامه محیط زیست جانوری
دوره 14، شماره 2
تیر 1401
صفحه 169-176

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