تعیین منا سب ترین سن و وزن بچه ماهی ازون برون (Acipenser stellatus) جهت رهاسازی به دریای خزر

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 نویسنده مسئول، انستیتو تحقیقات بین‏المللی ماهیان خاویاری، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی (ARRO)، رشت، ایران.

2 انستیتو تحقیقات بین‏المللی ماهیان خاویاری، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی (ARRO)، رشت، ایران.

چکیده

تعداد 1200 قطعه بچه ماهی ازون برون در سنین مختلف 55، 69، 77 و 85 روز بعد از زمان تخم گشایی با تراکم 100 قطعه در هر متر مربع ذخیره سازی شدند. عادت دهی بچه ماهیان ازون برون در چهار تیمار پرورشی شامل 55 روزه (1-5/0 گرم)تیمار A ، 69 روزه (3-1 گرم)تیمارB ،77 روزه ،( 5-3 گرم) تیمار C و 85 روزه (10-5گرم) تیمار D در آب انجام پذیرفت و 4 آزمایش در شوریهای مختلف(5/.-0 ، 4-5/. ،9-4 و 13-9 ) و هرآزمایش در 4 تیمار و هر تیمار دارای 3 تکرار طراحی شد. هر آزمایش در مدت زمانی تقریبا یک ماه به همراه غذادهی با غذای زنده ترجیحا گاماروس، کرم نرئیس، شیرونومیده در حد اشباع 6 وعده در روز و سیفون و تعویض آب مداوم و جاری نیز انجام پذیرفت. زیست سنجی هر 10 روز یکبار انجام گردید . بر اساس مطالعه انجام شده ، بچه ماهی ازون برون در دوره پرورشی 55 روزه ( 1-5/0گرم) بعد از 15 روز پرورش به رشدی در حدود 1 گرم رسید. در دوره پرورش 69 روزه ( 3-1گرم )بعد از 24 روز پرورش بچه ماهیان به میانگین وزنی 5 گرم رسیدند. در دوره پرورش 77 روزه ( 5-3گرم)، بعد از 24 روز پرورش بچه ماهیان به میانگین وزنی 7 گرم رسیدند. در دوره پرورش 85 روزه( 10-5 گرم) ، بعد از 26 روز پرورش بچه ماهیان به میانگین وزنی 14 گرم رسیدند. نتایج بررسی حاضر نشان داد، ب

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determining the maximum age and weight of juvenile (Acipenser stellatus) for release into the Caspian Sea

نویسندگان [English]

  • Alireza Ashouri 1
  • Zabbiallow Pajand 2
  • Ayoub Yousefi Jourdehi 2
  • Esmaeil Hosseinnia 2
  • Javad Saiadfar 2
  • Jalil Jalilpoor 2
1 Corresponding Author, International Sturgeon Research Institute, National Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran.
2 International Sturgeon Research Institute, National Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran.
چکیده [English]

Abstrac:
. A total of 1,200 A. stellatus juveniles at different ages of 55, 69, 77 and 85 days were stored at a density of 100 eggs per square meter. Habitation of A. stellatus juveniles in four breeding treatments including 55 days (0.5-1 g), 69 days (1-3 g), 77 days, (3-5 g) and 85 days (5-10 g) in water Accepted and 4 experiments in different salinities (0-- 0-5, 4-5 /., 9-4 and 9-13) and each experiment was designed in 4 treatments and each treatment had 3 replications. The results of the present study showed that the best breeding period for releasing juvenile A. stellatus fish into the sea (salinity 9-13) during 77 and 85 days (3 to 5 and 5 to 10 g) (df = 3, F = 8.933 P = 0.006) and (, df = 3, F = 68.800 P = 0.000). Is, which has the lowest loss rate.

کلیدواژه‌ها [English]

  • A. stellatus
  • age
  • weight
  • release
  • Caspian Sea
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