مطالعه آلودگی انگل‌های خارجی ماهی کپور نقره‌ای (سیپرینیده: هیپوفتالمیکتیس مولیتریکس) سد حسنلو (استان آذربایجان غربی)

نوع مقاله: مقاله کامل

نویسندگان

1 استاد بخش انگل شناسی، گروه پاتوبیولوژی، دانشکده دامپزشکی، دانشگاه ارومیه، ارومیه-ایران.

2 دکتری حرفه‌ای، بخش خصوصی، ارومیه، ایران.

چکیده

پرورش ماهی کپور نقره‌ای در سد حسنلو به عنوان یک منبع تأمین پروتئین مطرح است. این مطالعه به منظور تعیین فراوانی و تنوع گونه‌ای آلودگی انگل‌های خارجی در ماهی کپور نقره‌ای سد حسنلو انجام شد. تعداد 140 قطعه ماهی کپور نقره‌ای در تابستان و پاییز سال 1394 صید گردیدند. پس از زیست‌سنجی، آبشش جدا گردید و کمان‌های آبششی از نظر آلودگی انگلی بررسی شدند. عدسی چشم، باله‌ها، درپوش آبشش و پوست نیز برای جداسازی و شناسایی انگل‌های خارجی بررسی گردیدند. نتایج این مطالعه بیانگر وقوع آلودگی در ماهی‌های با وزن 33/45±18/660 گرم و طول 2/5±01/37 سانتی‌متر بود. از آبشش ماهی کپور نقره‌ای، 137 قطعه آلوده به
مونوژن داکتیلوژیروس (85/97 درصد)، 119 قطعه آلوده به تک یاخته تریکودینا (85 درصد) و 14 قطعه آلوده به کوپه پودارگازیلوس (10 درصد) بودند. تنوع گونه‌ای مونوژن داکتیلوژیروس شامل داکتیلوژیروس نوبیلیس (28/49 درصد)، داکتیلوژیروس آریستیکتیس (14/97 درصد)، داکتیلوژیروس تایهوانزیس (28/34 درصد) و داکتیلوژیروس اسکریابینی (85/7 درصد) بود. عدسی چشم 92 قطعه ماهی نیز با متاسرکر ترماتود دیپلوستوموم اسپاتاسئوم (71/65 درصد) آلوده بود. ارتباط معنی‌داری بین فراوانی آلودگی با طول بدن و وزن ماهی‌های آلوده وجود داشت. آلودگی انگلی توام با دو گونه (86/12 درصد)، سه گونه (29/49 درصد) و چهار گونه (29/4 درصد) در ماهی‌های تحت مطالعه ثبت گردید. آلودگی انگل خارجی در آبشش و چشم ماهی کپور نقره‌ای در سد حسنلو شایع بود و مطالعات تکمیلی در خصوص اثرات بیماری‌زایی و خسارت اقتصادی آن‌ها بر صنعت پرورش ماهی در منطقه توصیه می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Ectoparasite infestation in silver carp (Hypophthalmichthys molitrix) of Hassanlu dam, West Azarbaijan Province, Iran

نویسندگان [English]

  • M. Yakhchali 1
  • P. Aliali 2
1 Professor, Parasitology division, Pathobiology department, Faculty of Veterinary medicine Urmia. University, Urmia, Iran.
2 DVM, Private Sector, Urmia. University, Urmia, Iran.
چکیده [English]

Silver carp fish (Hypophthalmichthys molitrix) rearing and production is a main source of protein in Hassanlu dam, West Azarbaijan Province, Iran.This study was aimed to determine prevalence and diversity of ectoparasites in silver carp of Hassanlu dam. A total number of 140 silver carp fish were randomly trapped during summer and fall 2015. Fish biometry recorded and gill was removed to examine for parasites infestation. The eye lens, fines and skin also removed and examined for ectoparasites.The findings revealed that ectoparasite infestation outbreak was in fish with 660.18±45.33 gr and 37.01±5.2 cm. Of all examined fish, 137(97.14%, monogenea), 119 (85%, protozoan),92(65.71%, digenean) and 14(10%, copepod) were respectively infested with Dactylogyrus spp., Trichodina sp., Diplostomum and Ergazilus sp. Four species of genus Dactylogyrus, i.e. D. aristicthys (97.14%); D. nobilis (49.28%); D. thaihoansis (34.28%) and D. skrjabini (7.85%) were identified. The eye lenses of fish were infested with metacercariae of Diplostomum spathaceum. The prevalence had significant association with weight and length of infested fish. Mixed infestation was found with two (12.86%), three (49.29%) and four (4.29%) parasites species. It was concluded that ectoparasite infestation was prevalent in gill and eye lenses of examined silver carp fish in Hassanlu dam and further studies recommended to evaluate infectivity and economical impacts on fish industry in the region.

کلیدواژه‌ها [English]

  • Ectoparasite
  • Silver carp
  • Hassanlu Dam
  • Iran
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