نشریه محیط زیست طبیعی

مطالعه و مقایسه ترجیح زیستگاه جویبارماهی سفیدرود Oxynoemacheilus bergianus (Steindachner, 1897) رودخانه جاجرود در دو فصل پاییز و زمستان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دا. تهران- بیولوژی و اکولوژی ماهی

2 گروه شیلات، دانشکده منابع طبیعی دانشگاه صنعتی اصفهان، اصفهان، ایران

3 گروه شیلات، دانشکده منابع طبیعی دانشگاه تهران

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

چکیده

شناخت نیازهای زیستگاهی گونه‌های ساکن در رودخانه‌ها در برنامه‌ریزی برای حفاظت زیستگاه آن‌ها اهمیت بالایی دارد. این تحقیق با هدف بررسی ترجیح زیستگاهی جویبارماهی سفیدرود Oxynemacheilus bergianus در رودخانه جاجرود و مقایسه آن در دو فصل پاییز و زمستان به اجرا درآمد. برای این منظور فراوانی این گونه و متغیرهای زیستگاهی شامل ارتفاع، عمق، سرعت جریان آب، عرض رودخانه، شیب بستر، قطر متوسط سنگ بستر، نوع پوشش غالب سنگ بستر، هدایت الکتریکی (EC)، مواد جامد محلول (TDS)، pH، دمای آب و پوشش گیاهی ساحل در دو فصل پاییز و زمستان مورد سنجش و بررسی قرار گرفت. زیستگاه انتخابی این ماهی در فصل پاییز دارای ارتفاع و عمق کمتر، جریان سریعتر، بستر با سنگ‌های متوسط، شیب کمتر، دمای بالاتر، EC و TDS متوسط و حاشیه رودخانه با پوشش درختچه‌ای- درختی بودند ولی در فصل زمستان زیستگاه مطلوب این گونه شامل نواحی با ارتفاع، عمق و جریان آب بیشتر، و بستر با سنگ‌هایی با اندازه متوسط، دمای متوسط، EC متوسط، TDS کمتر و ساحل دارای پوشش درختی بود به عبارت دیگر نتایج نشان داد که ترجیح این گونه در فصل زمستان به مناطق با عمق، عرض، ارتفاع از سطح دریا و شیب بیشتر تغییر می‌یابد.

کلیدواژه‌ها

عنوان مقاله [English]

Habitat preference of Sefid river loach, Oxynoemacheilus bergianus (Steindachner, 1897) in Jajroud River by comparing its preference in autumn and winter

نویسندگان [English]

  • Soheil Eagderi 1
  • Mazaher Zamani-Faradonbeh 2
  • Hadi Poorbagher 3
  • Atta Mouludi-Saleh 4

1 University of Tehran

2 Department of Fisheries, Faculty of Natural Resources, Isfahan University of Technology. Isfahan. Iran

3 Department of Fisheries, Faculty of Natural Resources, University of Tehran. Karaj. Iran

4 Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran

چکیده [English]

Understanding the habitat preference of riverine species is important in their management to protect their habitat. This study aimed to investigate the habitat preference of the Sefid river loach, Oxynemacheilus bergianus in Jajroud River by comparing its preference in autumn and winter. For this purpose, elevation, depth, water current velocity, river width, slope, average diameter of the bedrock, type of predominant bedrock cover, EC, TDS, pH, water temperature and beach vegetation were measured and investigated in autumn and winter. The preferred habitat of this species in autumn had lower elevation and depth, faster water current, medium rock bed, lower slope, higher temperature, medium EC and TDS and river bank with shrub-tree cover, but in winter the selected habitat changed to areas with higher elevation, depth and water current, and bed with medium-sized rocks, medium temperature, medium EC, less TDS and the river bank with tree cover i.e. the results showed that the preferred habitat of this species in winter changes to areas with greater depth, width, elevation and slope.

کلیدواژه‌ها [English]

  • Ecology
  • Jajroud
  • Environmental parameters
  • Suitability
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نشریه محیط زیست طبیعی
دوره 74، شماره 1
خرداد 1400
صفحه 1-11