اثر سطوح مختلف پیکولینات کروم جیره برعملکرد تولید، هماتولوژی و سطوح لیپیدی کبد در ماهی طلال هندی (Rastrelliger kanagurta)

نوع مقاله: مقاله کامل

نویسندگان

گروه شیلات، دانشکده علوم دریایی، دانشگاه دریانوردی و علوم دریایی چابهار، چابهار، ایران

چکیده

تحقیق حاضر به‌منظور بررسی اثر سطوح غذایی پیکولینات کروم بر شاخص‌های رشد (وزن نهایی و ضریب رشد ویژه، افزایش وزن به‌دست آمده و شاخص وضعیت)، تغذیه (ضریب تبدیل غذایی و نسبت بازدهی پروتئین)، هماتولوژی (هموگلوبین، تعداد گلبول‌های سفید و تعداد گلبول‌های قرمز) و سطوح لیپیدی کبد (کلسترول و تری‌گلیسرید) ماهی طلال (Rastrelliger kanagurta) به مدت 60 روز صورت گرفت. در این مطالعه، تعداد 120 قطعه ماهی طلال با میانگین وزنی 01/1±18/7 گرم در یک طرح کاملا تصادفی به چهار تیمار آزمایشی و سه تکرار ( با تعداد 10 قطعه در هر تکرار) تقسیم شدند و به ترتیب با رژیم‌های غذایی حاوی صفر، 600، 800 و 1000 میکروگرم پیکولینات کروم بر کیلوگرم غذا مورد تغذیه قرار گرفتند. نتایج حاصله نشان داد که بالاترین وزن نهایی، ضریب رشد ویژه، شاخص وضعیت، نسبت بازدهی پروتئین، افزایش وزن به‌دست آمده و کمترین ضریب تبدیل غذا در تیمار حاوی 600 میکروگرم پیکولینات کروم بر کیلوگرم غذا مشاهده شدکه با تیمار شاهد دارای تفاوت معنی‌دار بود (05/0>P). سطوح تری‌گلیسرید و کلسترول کبد در تیمار حاوی 600 میکروگرم پیکولینات کروم بر کیلوگرم غذا کاهش معنی‌داری را در مقایسه با سایر تیمار‌ها نشان داد (05/0>P) و بیشترین تعداد گلبول‌های سفید، گلبول‌های قرمز خون و میزان هموگلوبین در تیمار‌های حاوی 600 و 800 میکروگرم پیکولینات کروم بر کیلوگرم غذا مشاهده شد. تیمار حاوی 1000 میکروگرم پیکولینات کروم برکیلوگرم غذا بر کلیه شاخص‌های رشد و هماتولوژی تاثیر نداشت (05/0<P). در مجموع بر اساس نتایج این تحقیق، افزودن 600 و 800 میکروگرم مکمل غذایی پیکولینات کروم بر کیلوگرم جیره غذایی ماهی طلال به‌منظور بهبود شاخص های رشد، هماتولوژی و سطوح لیپید کبد در این ماهی پیشنهاد می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of different levels of dietary chromium picolinate on productive performance, hematology and live Lipid levels in Indian Mackerel (Rastrelliger kanagurta)

نویسندگان [English]

  • P. Akbary
  • S. Makari
Fisheries Department, Marine Sciences Faculty, Chabahar Maritime University, Chabahar, Iran.
چکیده [English]

This experiment was conducted to evaluate the effect of different levels of dietary chromium picolinate on the growth performances (final weight (FW), specific growth ratio (SGR), weight gain (WG) and condition factor (CF)), feed indices (feed conversion rate (FCR) and protein efficiency ratio (PER)) hematology (hemoglobin (Hb), red blood cell (RBC), white blood cell (WBC) and liver lipid levels (cholesterol and triglyceride)) of Indian mackerel (Rastrelliger kanagurta) for 60 days. In this experiment, 120 Indian mackerel (with average weight of 7.18±1.01 g) were divided to four treatments and three replicates (n=10 in each replicate) in a completely randomized design and fed with diets containing 0, 600,800 and 100 µg chromium picolinate/kg food, respectively. The present results showed that the highest FW, SGR, CF, PER, WG and the lowest FCR were observed in the diet containing 600 µg/kg chromium picolinate in all of the parameters. Treatment two (600 µg /kg) showed a significant difference compared with control treatment (P<0.05). Treatment containing 600 µg /kg chromium picolinate had significantly reduced liver cholesterol and triglyceride levels compared with those in other treatments. The highest WBC, RBC and hemoglobin were observed in treatments containing 600 and 800 µg/kg chromium picolinate. Treatment containing 1000 µg/kg chromium picolinate was not affected in all growth parameters and hematology (P>0.05). Finally, the present results suggest that diet containing 600 and 800 µg/kg dietary chromium picolinate could improve growth and hematology indices and liver lipid levels of Indian mackerel.

کلیدواژه‌ها [English]

  • Rastrelliger kanagurta
  • chromium picolinate
  • Growth
  • Hematology
  • Cholesterol
  • Triglyceride

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