نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد،گروه شیلات، دانشکده منابع طبیعی، دانشگاه زابل. ایران

2 دانشیار ،گروه شیلات، پژوهشکده تالاب بین المللی هامون، دانشگاه زابل. ایران.

3 دانشیار ،گروه شیلات، دانشکده علوم دریایی ، دانشگاه دریانوردی و علوم دریایی چابهار. ایران.

4 کارشناس ارشد ،گروه شیلات، دانشگاه صنعتی خاتم الأنبیاء (ص) بهبهان. ایران

چکیده

در این تحقیق سطح پاسخ جمعیت روتیفر B. calyciflorus نسبت به شش غلظت مختلف از کارباریل (1،0، 10، 100، 200 و 400 میکروگرم در لیتر (parts per billion)) با سه تکرار طی مدت شش روز مورد بررسی قرار گرفت. تراکم و نرخ رشد ویژۀ روتیفرها به طور روزانه محاسبه شد. نتایج نشان داد که رشد جمعیت روتیفرها با افزایش غلظت کارباریل به طور معنی‌داری (05/0>P) کاهش یافت. بیشترین تراکم (001/1±79/34 فرد در میلی­لیتر) در روز ششم مربوط به تیمار شاهد و کمترین تراکم (10/0±28/6 فرد در میلی­لیتر) مربوط به تیمار حاوی غلظت 400 میکروگرم در لیتر کارباریل به‌ دست آمد. نرخ رشد ویژۀ روتیفرها با افزایش غلظت کارباریل به طور معنی‌داری (05/0>P) کاهش یافت و از 006/0±71/0 در تیمار شاهد به 003/0±37/0 در غلظت 400 میکروگرم در لیتر آفت‌کش رسید. نتایج این تحقیق نشان داد که آفت‌کش کارباریل جمعیت روتیفر B. calyciflorusرا به شدت تحت تأثیر قرار می­دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Carbamate pesticide carbaryl effect on population growth of freshwater rotifer Brachionus calyciflorus

نویسندگان [English]

  • Asma YarAhmadi 1
  • Moustafa Ghafari 2
  • Ahmad Gharayi 3
  • Musayeb Seyedi Ab Alvan 4

1 M.Sc. Student, Department of Fisheries, Faculty of Natural Resources, University of Zabol. Iran  

2 Associate Professor, Department of Fisheries, Hamoon International Wetland Research Institute, University of Zabol. Iran.  

3 Associate Professor, Department of Fisheries, Faculty of Marine Sciences, Chabahar University of Naval and Marine Sciences. Iran.

4 M.Sc., Department of Fisheries, Khatam Al-Anbia University of Technology, Behbahan. Iran  

چکیده [English]

Rotifers is frequently used as indicator test animals of water pollutants due to their sensitivity and ecological importance. In present study, population response of rotifer B. calyciflorus to six different concentrations of carbaryl (0, 1, 10, 100, 200 and 400 µg/l(parts per billion)) with three replicates per concentration was studied for 6 days. Rotifer density and specific growth rate were calculated daily in the control and treatments containing carbaryl. Result showed that, rotifer population growth decreased significantly (p< 0.05) with increasing carbaryl concentration in the medium. The maximum density in six day belongs to control (49.15± 0.05 ind/ml) and minimum density belongs to treatments containing concentration of 400 µg/l carbaryl (6.28± 0/1 ind/ml). Also, the rotifer specific growth rate decreased significantly (p< 0.05) (from 0.71± 0/006 in control group to 0.37± 0/003 in concentration of 400 µg/l) with increasing concentration of this pesticide. The results showed that the pesticide carbaryl even at very low concentrations can highly affect the population rotifer B. calyciflorus.

کلیدواژه‌ها [English]

  • Population density
  • Rotifer
  • carbaryl
  • Specific Growth Rate
 
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