بررسی فراوانی و تنوع زیستی جوامع زئوپلانکتونی در استخرهای پرورش ماهیان گرمابی استان مازندران

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 پژوهشکده اکولوژی دریای خزر، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، فرح‌آباد، ساری، ایران

2 1پژوهشکده اکولوژی دریای خزر، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، فرح‌آباد، ساری، ایران

چکیده

این مطالعه نتیجه تحقیقی در سال 1391 است. در این تحقیق زئوپلانکتون از چهار استخر گرمآبی واقع در استان مازندران ، با موقعیت جغرافیایی "12'68 ˚36 شمالی و "76 '41 ˚53 شرقی مورد مطالعه قرار گرفتند. هر یک از استخرها به مساحت 3 هکتار و مستطیل شکل بودند که هر یک جداگانه از آب چاه آبگیری میشدند و تحت یک مدیریت قرار داشتند. نمونه برداری توسط تور با چشمه 55 میکرون طی ماههای تیر ، مرداد و شهریور ، هر 15 روز نمونه برداری شد و سپس در آزمایشگاه، شناسایی و شمارش انجام و سپس اطلاعات به دست آمده داده پردازی گردیدند. در تحقیق حاضر 6 گروه زئوپلانکتونی شامل 1 جنس Copepoda (پاروپایان)، 9 جنس Rotifera (گردان تنان) و 5 جنس Protozoa (آغازیان)، 1 جنس Cladocera (آنتن منشعبان)، 1 جنس Mollusca (نرمتنان) و 2 جنس Cirripedia (مژه پایان) شناسایی شد. بیشترین درصد گروه های مختلف زئوپلانکتون در استخر های ماهیان گرمابی مربوط به Protozoa (44%) بود که مربوط به دو جنس Ciliata با میانگین تراکم 7±7/8544 (تعداد در متر مکعب) و Vorticella با میانگین تراکم 05±05/5128 (تعداد در متر مکعب) بود ولی از آنجایی که این گروه از نظر سایز و اندازه کوچکند لذا روتیفرها بیشترین زی توده را داشتند که Brachionus sp.غالب بود که 65% کل زی توده به این جنس اختصاص داشت که نشان دهنده شرایط نسبتا مناسب تغذیه ماهیان در استخر ها می باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Study on frequency and biodiversity of zooplankton communities in Warm Fishes pools of Mazandaran province

نویسندگان [English]

  • Fatemeh Sadat Tahami 1
  • Mozhgan Roshan Tabari 1
  • Abolghasem Rouhi Kolagar 1
  • Mehdi Naderi Jolodar 1
  • Mohammad Ali Afraie Bandpey 2
1 1Caspian Sea Ecology Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research Education and Extention Organization (AREEO), Farahabad, Sari, Iran
2 1Caspian Sea Ecology Research Institute, Iranian Fisheries Science Research Institute, Agricultural Research Education and Extention Organization (AREEO), Farahabad, Sari, Iran
چکیده [English]

Knowing the zooplankton of any aquatic ecosystem is very effective in managing this ecosystem and since zooplankton plays an important role in the transfer of the photosynthetic material transmitted by phytoplankton to other organisms at higher levels. In this study, zooplankton from three Warm Fishes pools in Mazandaran province, each with a 3 hectare and rectangular area, each separately separated from the well water was sampled by a sampler with mesh size 55-micron, and data was collected at the Laboratory for identification, counting and data. . In the present study, six groups of zooplankton including 1 genus Copepoda, 9 genera Rotifera and 5 genera Protozoa, 1 Cladocera, 1 Mollusca and 2 Cirripedia genuses were identified. The highest percentage of zooplankton groups in hydrothermal pools was related to Protozoa (44%), which belonged to two genera Ciliata with a mean density of 8544.7 ± 7 (number per cubic meter) and Vorticella with a mean density of 5128.05 ± 05 Number in m 3), and since this group of zooplankton was not suitable for feeding, they were not fed to infants, resulting in better conditions for growth, and the rotifers had the most masses, of which Brachionus sp dominated that 65% of this genus is devoted to the relatively good conditions for feeding fish in these pools.

کلیدواژه‌ها [English]

  • "Zooplankton"
  • " Warm Fishes "
  • "biodiversity"
  • "density"
  • "Biomass"
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