بررسی ترکیب و فراوانی درشت بی مهرگان کفزی استخرهای پرورش میگو مجتمع گمیشان-جنوب شرقی دریای خزر

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 نویسنده مسئول، استادیار مؤسسه تحقیقات علوم شیلاتی، مرکز تحقیقات ذخایر آبزیان آب‌های داخلی، استان گلستان، گرگان، ایران.

2 دانش‌آموخته دکتری تولید و بهره‌برداری آبزیان، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

3 استادیار مؤسسه تحقیقات علوم شیلاتی، مرکز تحقیقات ذخایر آبزیان آب‌های داخلی، استان گلستان، گرگان، ایران.

4 کارشناس پژوهشی، مؤسسه تحقیقات علوم شیلاتی، مرکز تحقیقات ذخایر آبزیان آب‌های داخلی، استان گلستان، گرگان، ایران.

چکیده

این مطالعه به جهت تعیین ترکیب و فراوانی بزرگ بی مهرگان کفزی استخرهای پرورش میگو منطقه گمیشان استان گلستان انجام گرفت. در این تحقیق نمونه برداری با استفاده از نمونه بردار رسوب و بنتوز (اکمن گرب) در 5 زمان شامل اواسط تیرماه، اواخر تیرماه، اواسط مردادماه، شهریورماه و مهرماه صورت گرفت.در آزمایشگاه نمونه های از یک غربال 500 میکرومتری گذرانده سپس با لوپ و میکروسکوپ تمام اورگانیسم ها براساس کلید های موجود شناسایی شدند. شناسایی جوامع ماکروبنتوزی وجود سه گروه اصلی نرم تنان، کرم های حلقوی و بندپایان را به ترتیب با فراوانی 2/94، 07/3 و 73/2 درصد نشان داد. ترکیب و فراوانی گروه های ماکروبنتوزی در ماه های مختلف و بسیار متفاوت بود. بطوریکه بیشترین فراوانی در ماه های مرداد و شهریور مشاهده شد ولی بیشترین تنوع مربوط به تیرماه بود. بین گونه های مورد بررسی بیشترین تعداد مربوط به راسته Littorinimorpha و گونه Pyragohydrobia sp. با فراوانی 71 درصدی از مجموع کل گونه های شمارش شده بیشترین فراوانی را به خود اختصاص داده بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating the composition and abundance of benthic macroinvertebrates in the shrimp culture ponds of Gomishan region-Southeastern Caspian Sea

نویسندگان [English]

  • Abdolazim Fazel 1
  • Fatemeh Abbasi 2
  • Abbasali Aghaei Moghaddam 3
  • Taher Poursufi 4
  • Behgruz Monsouri 4
  • Behrooz Gharavy 4
1 Corresponding Author, Assistant Prof., Iranian Fisheries Sciences Research Institute, Inland Waters Aquatics Resources Research Center, Golestan Province, Gorgan, Iran
2 Ph.D. Graduate of Aquatics Production and Exploitation, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Assistant Prof., Iranian Fisheries Sciences Research Institute, Inland Waters Aquatics Resources Research Center, Golestan Province, Gorgan, Iran
4 Researcher Expert, Iranian Fisheries Sciences Research Institute, Inland Waters Aquatics Resources Research Center, Golestan Province, Gorgan, Iran
چکیده [English]

This study was conducted to determine the composition and abundance of benthic invertebrates in shrimp ponds in Gomishan region of Golestan province. In this research, sampling was done using a sediment and benthos sampler (Ekman Garb) in five times, including mid-July, late July, mid-August, September, and October. In the laboratory, the samples were passed through a 500-micrometer sieve, and then all organisms were identified with a loupe and microscope based on the available keys. The identification of macrobenthic communities showed the presence of three main groups of Mollusca, annelids and arthropods with frequencies of 94.2, 3.07 and 2.73%, respectively. The composition and abundance of macrobenthic groups were very different in different months. Thus, the highest frequency was observed in the months of August and September, but the highest variation was in July. Among the examined species, the most abundant ones are Littorinimorpha and Pyragohydrobia sp. It had the highest frequency with 71% of the total number of counted species.

کلیدواژه‌ها [English]

  • Macroinvertebrates
  • shrimp farming
  • Gamishan
  • Golestan province
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