اثر مکمل غذایی آستاگزانتین بر عملکرد رشد، بقاء و برخی شاخص های ایمنی ذاتی لارو قزل آلای رنگین کمان (Oncorhynchus mykiss)

نوع مقاله : علوم جانوری

نویسندگان

1 گروه بهداشت و بیماری آبزیان، دانشکده دامپزشکی شیراز، دانشگاه شیراز، شیراز، ایران

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

چکیده

آبزی­ پروری متراکم منجر به افزایش استرس، شیوع بیماری باکتری و درنهایت تلفات می­ گردد. تحقیق حاضر به­ منظور بررسی اثر مکمل غذایی آستاگزانتین بر عملکرد رشد، بقاء و برخی شاخص ­های ایمنی لارو قزل ­آلای ­رنگین ­کمان (Oncorhynchus mykiss) به ­مدت 60 روز صورت گرفت. به ­این منظور، تعداد 360 قطعه لارو قزل ­آلای ­رنگین کمان با میانگین وزنی 0/01±0/13 گرم، در یک طرح کاملاً تصادفی به 4 تیمار آزمایشی و 3 تکرار (10 قطعه در هر تکرار) تقسیم شدند و به ­ترتیب با رژیم ­های غذایی حاوی 0، 50، 100 و 150 میلی­ گرم آستاگزانتین بر کیلوگرم غذا مورد تغذیه قرار گرفتند. نتایج حاصله نشان داد که رژیم ­های حاوی آستاگزانتین بر کیلوگرم غذا، تفاوت معنی  داری در شاخص ­های رشد، بقاء و ایمنی ذاتی در مقایسه با تیمار شاهد نشان دادند (0/05>P). بالاترین وزن نهایی، افزایش وزن به­ دست آمده، ضریب رشد ویژه، نسبت کارایی پروتئین، بقاء، پروتئین تام و گلوبولین در تیمار حاوی 100 میلی­ گرم آستاگزانتین بر کیلوگرم غذا مشاهده شد که با بقیه تیمار­ها دارای تفاوت معنی­ دار بود (0/05>P). بیش  ترین فعالیت لیزوزیم و آلیومین در تیمار­های حاوی 150 میلی­ گرم آستاگزانتین بر کیلوگرم غذا مشاهده شد که با بقیه تیمار­ها تفاوت معنی ­داری را نشان دادند (0/05>P). در مجموع براساس نتایج این تحقیق، افزودن 100 میلی­ گرم مکمل غذایی آستاگزانتین بر کیلوگرم جیره غذایی ماهی قزل ­آلای­ رنگین ­کمان به­ منظور بهبود شاخص ­های رشد، بقاء و پاسخ­ های ایمنی ذاتی در این ماهی پیشنهاد می ­شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of dietary supplementation of astaxanthin on growth performance, survival and several of innate immunity parameters of rainbow trout (Oncorhynchus mykiss) larvae

نویسندگان [English]

  • Mohsen Ali 1
  • Paria Akbary 2
  • Amin Gholamhosseini 1
  • Mohammad Saeid Fereidouni 1
1 Aquatic Animal Health and Diseases group, Faculty of Veterinary Medicine, Shiraz University, Shiraz, Iran
2 Department of Fisheries, Faculty of Marine Sciences, Chabahar University of Naval and Marine Sciences, Chabahar, Iran
چکیده [English]

High-density aquaculture has led to congestion and excessive stress and contributed to bacterial infection outbreaks that have caused high mortality. This experiment was conducted to evaluate the effect of dietary supplementation of astaxanthin on the growth performances, survival and several of innate immunity parameters of rainbow trout (Oncorhynchus mykiss) larvae for 60 days. In this experiment, 360 of larvae (with average weight of 0.13±0.01) in 4 treatments and 3 replicates (n=30 in each replicate) in a completely randomized design was divided and fed with diets containing 0, 50, 100 and 150 g astaxanthin /kg food respectively. The present results showed that diets containing astaxanthin showed a significant difference in growth, survival and innate immunity compared with control treatment (P<0.05). The highest FW, SGR, WG, PER, survival, total protein and globulin were observed in the diet containing 100 mg/kg astaxanthin which had a significant difference compared with other treatments (P<0.05). The highest lysozyme activity and albumin were observed in treatments containing 150 mg/kg astaxanthin which showed a significant difference compared with other treatments (P<0.05). Finally, the present results suggest that diets containing 100 and 150 g/kg dietary astaxanthin could improve growth, survival and innate immunity responses of rainbow trout.

کلیدواژه‌ها [English]

  • Oncorhynchus mykiss
  • Astaxanthin
  • Growth parameters
  • Innate immunity
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