تعیین میزان آناتوکسین-a در جلبکهای سبز ـ آبی اکوسیستم های آبی استان گیلان

نوع مقاله: مقاله پژوهشی

نویسنده

دانشیار دپارتمان اکولوژی پژوهشکدة آبزی‌پروری آب‌های داخلی کشور، مؤسسة تحقیقات علوم شیلاتی کشور، بندرانزلی، ایران

چکیده

شکوفایی شاخة جلبک‌های سبز ـ آبی (Cyanophyta) طی فصل تابستان نقش قابل توجهی در مرگ‌ ماهیان استخرهای پرورشی دارد. بنابراین، به منظور بررسی میزان سمیت جلبک‌های سبز ـ آبی غالب در استخرهای پرورش ماهیان گرمابی استان گیلان، هشت گونه از این شاخه جداسازی و پس از کشت، میزان سم آناتوکسین- aدر آن‌ها با روش گازکروماتوگرافی با دستگاه GC-MS تعیین شد. نتایج نشان داد که میزان سم در گونة Aphanizomenon flos- aquae با 91/19 میکروگرم بر کیلوگرم بیش از سایر گونه‌های مورد بررسی بود و کمترین میزان نیز در گونة Oscillatoria sp.با 53/1 میکروگرم بر کیلوگرم برآورد شد. به طور کلی، شکوفایی زیاد جلبک‌های مورد بررسی به‌خصوص دو گونةAphanizomenon flos- aquae  وAnabaena flos-aquae  منجر به مرگ‌ ماهیان در استخرهای پرورشی می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determine the amount of blue- green algae anatoxin-a in water ecosystems Guilan

نویسنده [English]

  • Maryam Fallahi Kapourchali
Associate Professor, National Inland Water Aquaculture Institute, Bandar Anzali, Iran
چکیده [English]

Summer blue- green algae (Cyanophyta) bloom playing a significant role in fish mortality in fish
farms.In order to determine the dominant blue-green algae toxicity eight species of cyanophyts in fish
farms were isolated and cultured.Then toxin levels anatoxin-a was measured by gas chromatography
with mass spectrometry (GC-MS) detection.The results showed that toxin levels in Aphanizomenon
flos- aquae with 19.91 μg/kg more than the other Species studied and the lowest in Oscillatoria sp.
with 1.53 μg/kg was estimated. Generally high blooms of cyanophyts, particularly two species of
Aphanizomenon flos- aquae and Anabaena flos-aquae can lead to mortality in fish farms.

کلیدواژه‌ها [English]

  • Aphanizomenon flos- aquae
  • bloom
  • Fish farms
  • Gas chromatography
  • Toxicity
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