بررسی استفاده از غلظت‌های مزمن ازن بر فاکتورهای رشد و بقا، ترکیبات لاشه وکیفیت آب میگو پا سفید غربی Litopenaeus vannamei

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

10.22034/aej.2021.309646.2659

چکیده

مدیریت کیفیت آب دراستخرها، مهم‌ترین عامل در رشد مناسب میگو و دست یافتن به تولید مناسب بیان است که می تواند به بهبود کیفی شرایط حاکم کف استخرها و رسیدن به تولید مورد نظر کمک شایانی نماید. آب با کیفیت نامناسب، باعث بروز استرس و بیماری می‌گردد. امروزه فناوری ازن می‌تواند در مناطقی که دارای ویروس، باکتری، و هم چنین قارچ هستند نیز به کار برده شود. با توجه به پتانسیل بالای اکسیداسیون، ازن اجزای سلولی دیواره سلولی باکتریایی برای کاهش تعداد میکروارگانیسم ها غیر فعال، اکسید می‌کند. دراین تحقیق از غلظت‌های مزمن ازن (0، 0/02 ، 0/04، 0/06 میلی گرم در لیتر ) بر روی میگوی پا سفید غربی به مدت 60 روز به صورت سریالی دو ساعت پس از هر وعده غذایی اعمال شد. در طول آزمایش فاکتورهای کیفیت اندازه گیری شد و در انتها نیز فاکتورهای رشد و آنالیز لاشه انجام گرفت. نتایج نشان داد شوری و دما در حد مطلوب پرورش میگوی پا سفید غربی واقع گردیده است و بین تیمارها اختلاف معنی داری وجود نداشت (0/05<p). با افزایش میزان غلظت ازن بین تیمارها اکسیژن محلول، pH و نیترات افزایش یافته و آمونیاک کل، مواد جامد معلق و نیتریت روند کاهشی پیدا کردند. هم چنین با توجه به آنالیز لاشه بین تیمارها اختلاف معنی داری در سطح پروتئین و خاکستر با روند کاهشی و چربی و رطوبت با روند افزایشی در رابطه با غلظت ازن دیده شد. نتایج حاصل از فاکتورهای رشد وجود اختلاف معنی دار بین سطوح ازن، بیانگر سطح مطلوب عوامل رشد به ترتیب در غلظت های 0/02 و 0/04 بودیم.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of the use of chronic ozone concentrations on growth and survival, Body composition, and water quality of West White leg Shrimp (Litopenaeus vannamei)

نویسندگان [English]

  • Farhad Konyeh
  • Gholamreza Rafiee
  • Kamran Rezaei tavabe
Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

Water quality management in culture ponds is the most important factor in the proper growth of shrimp and achieving proper production, which can help to improve the quality of the conditions of the pool floor and achieve the desired production. Poor quality water causes stress and illness. Today, ozone technology can be used in areas with viruses, bacteria, and fungi. Due to the high oxidation potential, ozone oxidizes the cellular components of the bacterial cell wall to reduce the number of inactive microorganisms. In this study, chronic ozone concentrations (0.02, 0.04, 0.06 mg/l) were applied serially to western white-leg shrimp for 60 days two hours after each diet. During the experiment, quality factors were measured, and at the end, growth factors and Body composition were performed. The results showed that salinity and temperature were in the optimal range of western white-leg shrimp and there was no significant difference between treatments (p>0.05). With increasing ozone concentration between treatments, dissolved oxygen, pH and nitrate increased and total ammonia, suspended solids, and nitrite decreased. Also, according to Body composition, there was a significant difference between the treatments in protein and ash levels with a decreasing trend and fat and moisture with an increasing trend concerning ozone concentration. The results of growth factors showed a significant difference between ozone levels, indicating the optimal level of growth factors in concentrations of 0.02 and 0.04, respectively.

کلیدواژه‌ها [English]

  • Ozone
  • West White leg Shrimp
  • Water Quality
  • Growth
  • Body composition

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فصلنامه محیط زیست جانوری
دوره 14، شماره 3
آبان 1401
صفحه 385-392

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