تاثیر توام تراکم و استراتژی های مختلف تغذیه ای بر عملکرد رشد و شاخص های هماتولوژیک ماهی کوی (Cyprinus carpio var. Koi)

نوع مقاله : تغذیه

نویسندگان

گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه سرا، ایران

چکیده

 در تحقیق حاضر اثر استراتژی­ های مختلف تغذیه ­ای در تراکم­ های مختلف ذخیره ­سازی بر رشد و پارامترهای هماتولوژیک ماهی کوی (Cyprinus carpio var. Koi) با میانگین وزن 0/27±3/44 گرم و به ­مدت 45 روز مورد بررسی قرار گرفت. برای این منظور ماهی ­ها در 6 تیمار آزمایشی در 3 تکرار شامل، تراکم بالا (20 عدد ماهی در مخزن) و تغذیه در حد سیری (20 C)، تراکم پایین (10 عدد ماهی در مخزن) و تغذیه در حد سیری (10 C)، تراکم بالا و تغذیه در حد 50% سیری (20 R)، تراکم پایین و تغذیه در حد 50% سیری (10 R)، تراکم بالا و گرسنگی (20 S)،  تراکم پایین و گرسنگی (10 S) درنظر گرفته شد. زیست­ سنجی ماهیان و اندازه ­گیری شاخص ­های رشد و تغذیه هر 15 روز یک ­بار انجام گرفت. در پایان دوره آزمایش خونگیری از ماهیان جهت اندازه­ گیری پارامترهای خونی به ­عمل آمد. نتایج نشان داد در پارامترهای رشد ماهی کوی با اعمال توام استراتژی تغذیه ­ای در تراکم مختلف اثر معنی­ داری بر فاکتورهای وزن کسب شده و فاکتور وضعیت  ماهیان مشاهده شد (0/05>P). پارامتر­های رشد در تیمارهای 20 C و 10 C نسبت به سایر تیمارها بالاتر بود. هم­ چنین با بررسی نتایج آنالیز خون ماهیان اعمال استراتژی تغذیه­ ای در تراکم مختلف تفاوت معنی­ داری در تعداد گلبول ­های سفید، درصد لنفوسیت و نوتروفیل ماهیان مشاهده شد (0/05>P). نتایج پژوهش کنونی نشان داد که تغذیه در حد سیری در تراکم بالا و پایین تاثیر مثبتی بر روی عملکرد رشد و پارامترهای هماتولوژیک ماهیان کوی دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Combined effect of density and feeding strategy on growth and hematological parameters of Cyprinus carpio var. Koi

نویسندگان [English]

  • Reza Abbasimesrdashti
  • Mirmasoud Sajjadi
  • Bahram Falahatkar
Department of Fisheries, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran
چکیده [English]

In the present study, the effect feeding strategy and density on growth and hematological parameters of Cyprinus carpio var. Koi with (mean initial weight 3.24 ± 0.27 g) (Mean ± Standard Error) for 45 days was investigated.  For this purpose, 6 treatments with triplicate groups included high density (20 fish per tank) and satiation feeding, low density (10 fish per tank) and satiation feeding, high density (20 fish per tank) and 50% satiation feeding, low density (10 fish per tank) and 50% satiation feeding (10R), high density (20 fish per tank) and starvation (20S), Low density (10 fish per tank) and starvation (10S) were considered. Fish biometrics and measurement of growth and nutrition parameters were performed every 15 days. At the end of the experiment, blood sampling was performed to measure blood parameters. The results showed that in the growth parameters of Koi fish with the combined application of nutritional strategy in different densities, significant effect on weight factors and fish status factor were observed (P <0.05). In growth parameters, C20 and C10 had higher values than other treatments. Also, by examining the results of fish blood analysis, there was a significant difference in the number of white blood cells, lymphocyte and neutrophil counts (P <0.05). The results of current research showed satiation feeding at high and low density had a positive effect on growth performance and hematological parameters of Koi fish.

کلیدواژه‌ها [English]

  • Cyprinids
  • density
  • nutrition
  • starvation
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