مدل‌سازی ترجیح زیستگاهی گونة نازک‌ماهی جنوب (Chondrostoma regium)؛ مطالعة موردی: رودخانة دینورآب

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه شیلات، دانشکده منابع طبیعی، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.

10.22059/jfisheries.2025.385193.1445

چکیده

مدل‌سازی شاخص مطلوبیت زیستگاه برای بیان طیف گسترده‌ای از نیازهای مدیریتی یا نقشه‌برداری زیستگاه یک گونه مورد استفاده قرار می‌گیرد. مدل‌های شاخص مطلوبیت زیستگاه (HSI) برای بررسی ترجیح زیستگاهی و کیفیت زیستگاه گونة نازک ماهی جنوب (Chondrostoma regium) در رودخانة دینورآب، زیر حوضة کرخه استفاده شد. نمونه‌برداری در رودخانة دینورآب در فصل پاییز سال 1398 از قسمت پایین‌دست به‌سمت بالادست در 5 ایستگاه هر کدام با سه تکرار مجزا و در مجموع 15 زیستگاه انجام شد. تعداد هشت عامل محیطی شامل عرض رودخانه، عرض ناحیة پتامال، عمق محل نمونه‌برداری، دمای آب، کل مواد جامد محلول، هدایت الکتریکی، pH و سرعت جریان آب اندازه‌گیری شدند. در مجموع تعداد 142 قطعه نازک‌ ماهی جنوب طی نمونه‌برداری از رودخانة دینورآب صید و پس از بازیابی وضعیت زیستی رهاسازی شدند. نتایج نشان داد بیشترین و کمترین مقادیر SI در ترجیح زیستگاهی نازک ماهی جنوب در رودخانة دینورآب، به‌ترتیب مربوط به عوامل عرض ناحیة پتامال (0/809) و کل مواد جامد محلول (0/499) است. بررسی شاخص مطلوبیت زیستگاه کل (0/573) نشان داد که رودخانة دینورآب برای گونة مورد مطالعه یک زیستگاه با مطلوبیت متوسط محسوب می شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Habitat preference modeling of Brond-snout (Chondrostoma regium); Case study: Dinorab River

نویسندگان [English]

  • Seyed Mohammad Ahmadian
  • Soheil Eagderi
  • Hadi Poorbagher
Department of Fisheries, Faculty of Natural Resources, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
چکیده [English]

Habitat suitability index (HSI) modeling describes a wide range of management requirements or species habitat mapping. HSI models were used to investigate the habitat preference and habitat quality of the Brond-snout, Chondrostoma regium, in the Dinorab river, a sub-basin of the Karkheh. Sampling was done in the Dinorab river during the fall season, from the downstream to the upstream, in 5 stations in 2018, each with three replications and a total of 15 habitats. Eight environmental factors were measured, including river width, potamal width, depth, temperature, total dissolved solids, electrical conductivity, pH, and velocity. During the sampling period, 142 specimens were caught and released after restoring biological status in the Dinorab river. The results showed that the highest and lowest SI values ​​for the habitat preference of C. regium in the Dinorab river were related to potamal width (0.809) and total dissolved solids (0.499), respectively. The total habitat desirability index (0.573) showed that the Dinorab river is a medium-desirability habitat for C. regium.

کلیدواژه‌ها [English]

  • Ecology
  • Karkheh basin
  • Modeling
  • Suitability index
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