مقایسة رشد، ایمنی غیراختصاصی و استرس ماهی قزل‌آلای رنگین‌کمان (Oncorhynchus mykiss) در استخرهای بتونی (هشت‌ضلعی، گرد و مستطیلی) دومنظورة ذخیرة آب کشاورزی در منطقة سیستان

نویسندگان

1 دانش‌آموخته کارشناسی ارشد گروه شیلات، دانشکده منابع طبیعی، دانشگاه زابل، زابل، سیستان و بلوچستان، ایران

2 استادیار گروه شیلات، دانشکده منابع طبیعی، دانشگاه زابل، زابل، سیستان و بلوچستان، ایران

3 استادیار گروه شیلات، پژوهشکده تالاب بین المللی هامون، دانشگاه زابل، زابل، سیستان و بلوچستان، ایران

10.22059/jfisheries.2023.91488

چکیده

تحقیق حاضر به‌منظور بررسی مقایسه‌ای فراسنجه‌های رشد، ایمنی غیراختصاصی و استرس ماهی‌‌ قزل‌آلا (میانگین وزن 05/2±28/30 گرم) در انواع استخرهای مستطیل  شکل (تیمار 1)، گرد (تیمار 2) و هشت‌ضلعی (تیمار 3) دومنظورة ذخیرة آب کشاورزی، با تراکم 20 قطعه در مترمکعب (3 تکرار) و دبی آب 5/2 لیتر در ثانیه، به‌مدت 5 ماه انجام شد. براساس نتایج افزایش میزان اکسیژن محلول، کاهش میزان لجن بستر و آمونیاک تیمار 3 نسبت به دو تیمار دیگر اختلاف معنی‌داری داشت(0/0.05≥P). بیشترین و کمترین مقدار وزن نهایی به‌ترتیب در ماهیان تیمار3 (22/16±434/21گرم) و تیمار1 (18/1891394/41گرم) مشاهده شد (0/05≥P). نتایج فراسنجه‌های خونی نشان داد که مقادیر گلبول‌های‌قرمز، هموگلوبین، هماتوکریـت و شاخص‌های گلبول قرمز (MCH، MCV و MCHC) بین تیمارهای مختلف فاقد اختلاف معنی‌دار بود (05/0≤P). بیشترین و کمترین میزان شاخص‌های استرس (گلوکز و کورتیزول) و ایمنی غیراختصاصی (تعداد و درصد افتراقی گلبول‌های‌سفید، فعالیت کمپلمان پلاسما، ایمونوگلوبولین، پروتئین کل و لیزوزیم سرم خون) به‌ترتیب متعلق به تیمار 1 و 3 بود (0/05≥P). نتایج نشان داد که وضعیت بهتر خودپالایی در تیمار 3 نسبت به سایر تیمارها، تأثیر مثبت و معنی‌دار برخی فراسنجه‌های رشد، ایمنی غیراختصاصی و استرس ماهی قزل‌آلا دارد، بنابراین می‌توان در راستای اقتصاد مقاومتی و تولید اقتصادی‌تر، این نوع استخر را برای ذخیرة آب وپرورش ماهی قزل‌آلا در بین کشاورزان منطقة سیستان ترویج نمود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of growth, nonspecific immunity systems and stress of Oncorhynchus mykiss in concrete agricultural water storage ponds (octagonal, round and rectangular) in the Sistan region

نویسندگان [English]

  • Mahmoodreza Sargolzaie 1
  • Ali Arshadi 2
  • Abdoll Ali Rahdarie 3
1 MSc Graduated, Department of Fisheries, Faculty of Natural Resources, University of Zabol, Zabol, Sistan and Baluchistan, Iran
2 Assistant Professor, Department of Fisheries, Faculty of Natural Resources, University of Zabol, Zabol, Sistan and Baluchistan, Iran
3 Assistant Professor, Department of Fisheries, Hamoon International Wetland Research Institute, University of Zabol, Zabol, Sistan and Baluchistan Iran
چکیده [English]

The present study was conducted to compare the growth, nonspecific immunity systems and stress of Oncorhynchus mykiss in three concrete agricultural water storage ponds, consisted rectangular (Treatment 1), round (Treatment 2), and octagonal (Treatment 3) shapes in a trout farm. Density of 20 fish/m3 (3 repetitions) and water flow D.B of 2.5 lit/sec, were run for each experimental unite and fish cultured for 5 months. According to the results, higher dissolved oxygen and reduction in sludge and NH3 production recorded in water in treatment 3 compared to other treatments (p≤0.05). The highest and lowest final individual weight measured in treatment 3 (434.21±22.16 g) and treatment 1 (349.41±18.91 g), respectively (p≤0.05). The values of RBC, hemoglobin, hematocrit, MCV, MCH and MCHC were not significantly different among treatments (p≥0.05). The highest and lowest levels of stress indicators (glucose and cortisol) and nonspecific immune systems of fish (number and differential percentage of WBC, plasma complement activity, immunoglobulin, total protein and serum lysozyme) belonged to treatments 1 and 3, respectively (p≤0.05). The results showed that, treatment 3 has better self-purification status than the other treatments, and has a positive and significant effect on growth, nonspecific immune systems and stress in rainbow trout. Therefore, using rectangular shape of pond for culture of trout can be promoted among the farmers of Sistan region in the direction of resistance economy and more economical production.

کلیدواژه‌ها [English]

  • Production efficiency
  • Stocking density
  • Reservoir pond
  • Oncorhynchus mykiss
  • Sistan
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