مطالعۀ تلفات ناشی از آلودگی آبشش ماهیان خاویاری سیبری (Acipenser baerii) به انگل دیکلی بوتریوم آرماتوم (Diclybothrium armatum) در مزارع پرورشی ماهیان خاویاری استان های قم و مازندران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه بهداشت و بیماری های آبزیان، دانشکده دامپزشکی، دانشگاه تهران، تهران، ایران

2 دانشکده دامپزشکی، دانشگاه تهران، تهران، ایران

چکیده

ماهیان خاویاری یا تاس ماهیان از ارزشمندترین گونه ­های آبزیان در سراسر جهان به شمار رفته و از دیدگاه تجاری و اقتصادی از اهمیت به سزایی برخوردارند. انگل ترماتود منوژن دیکلی­بوتریوم آرماتوم یکی از انگل­ هایی به ­شمار می ­رود که نسبت به میزبان خود اختصاصیت داشته و متعاقب تهاجم به میزبان، سبب بروز علائمی نظیر اختلال در سیستم تنفسی، آسیب ­های متعدد آبششی، کاهش تحرک، شنای سطحی، بلعیدن حباب­ های هوا در نزدیکی سطح آب و تلفات مداوم در ماهیان خاویاری سیبری می­ گردد. هدف از مطالعۀ حاضر، بررسی عوامل تلفات در ماهیان خاویاری سیبری مزارع پرورشی ماهیان خاویاری استان­ های قم و مازندران بود. در این مطالعه، 20 عدد ماهی خاویاری سیبری با اندازۀ 80 الی 90 سانتی ­متری در طی ماه­ های اردیبهشت و شهریور سال 1399 از مزارع پرورشی ماهیان خاویاری به کلینیک آبزیان دانشکده دامپزشکی دانشگاه تهران ارجاع شده و از لحاظ ویژگی­ ها و خصوصیات ظاهری، مورد بررسی و پایش قرار گرفتند. در بررسی­ های ماکروسکوپیک اولیه، شماری از انگل ­ها در بافت آبشش ماهیان خاویاری سیبری با چشم غیرمسلح قابل مشاهده بوده ولی نشانه ­ای از حضور عوامل بیماری زای انگلی در بافت آبشش ماهیان ازون­ برون و فیل ­ماهی وجود نداشت. سپس، به منظور بررسی بهتر آلودگی ­های انگلی، از بافت آبشش ماهیان، گسترش مرطوب تهیه و در زیر میکروسکوپ نوری به ­دقت بررسی شدند که بر اساس کلید­های تشخیصی موجود، حضور انگل ­های منوژن دیکلی­بوتریوم آرماتوم در آبشش ماهیان خاویاری سیبری مورد تایید قرار گرفت. به­ منظور درمان ماهیان مبتلا، اقدام به تجویز حمام نمک (به­ منظور افزایش شوری آب) به­ میزان 20 گرم بر لیتر و به­ مدت 7 روز (روزانه 1 ساعت) شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study of the losses of Siberian sturgeon (Acipenser baerii) due to gill infection with Diclybothrium armatum in sturgeon farms of Qom and Mazandaran provinces

نویسندگان [English]

  • Hooman Rahmati Holasoo 1
  • Amin Marandi 1
  • Hosseinali Ebrahimzadeh Mousavi 1
  • Amirparsa Azizi 2
1 Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
2 Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
چکیده [English]

Sturgeon is one of the most valuable aquatic species in the world and is of great commercial and economic importance. Monogenean trematode Diclybothrium armatum is one of the parasites which is specific to its host and after invading the host, causes symptoms such as respiratory system disorders, multiple gill injuries, decreased mobility, surface swimming, swallowing air bubbles near the water surface, and persistent losses occur in Siberian sturgeon. The aim of the present study was to investigate the causes of losses in Siberian sturgeon farms of sturgeon farms in Qom and Mazandaran provinces. In this study, 20 Siberian sturgeons with a size of 80 to 90 cm during the months of May and September 2016 from sturgeon farms were referred to the aquatic animal clinic of the faculty of veterinary medicine, university of Tehran and in terms of characteristics and appearance, were examined and monitored. In the initial macroscopic examinations, a number of parasites were visible in the gills of Siberian sturgeon with the naked eye, but there was no sign of the presence of parasitic pathogens in the gills of starry sturgeon and beluga fish. Then, in order to better investigate the parasitic infections, a wet smear was prepared from the gill tissue of fish and carefully examined under a light microscope. Based on the available diagnostic keys, the presence of Diclybothrium armatum monogenic parasites in the gills of Siberian sturgeon was confirmed. In order to treat the infected fish, a salt bath (to increase the salinity of water) was prescribed at a rate of 20 g / l for 7 days (1 hour daily).

کلیدواژه‌ها [English]

  • Siberian sturgeon
  • Diclybothrium armatum
  • Monogenean trematode
  • Salt bath
  • Gill

مراجع

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فصلنامه محیط زیست جانوری
دوره 13، شماره 4
دی 1400
صفحه 193-200

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