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بررسی ساختار سن و ویژگیهای رشد ماهی سفید رودخانهای Squalius cephalus (Linnaeus, 1758) در سواحل جنوبی دریای خزر | ||
| فصلنامه علمی زیست شناسی جانوری تجربی | ||
| مقاله 2، دوره 2، شماره 4، خرداد 1393، صفحه 15-25 اصل مقاله (614.92 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| مریم علی زاده* 1؛ رحمان پاتیمار2؛ اصغر عبدلی3؛ محمد فرهنگی4؛ حسین آدینه5 | ||
| 1کارشناسی ارشد شیلات دانشگاه گنبد کاووس | ||
| 2دانشیار اکولوژی ماهی، دانشکده منابع طبیعی دانشگاه گنبد کاووس | ||
| 3دانشیار اکولوژِی ماهی و ماهی شناسی، دانشکده تنوع زیستی دانشگاه شهید بهشتی تهران | ||
| 4مربی گروه شیلات، دانشکده کشاورزی و منابع طبیعی دانشگاه گنبد | ||
| 5دانشجوی دکتری شیلات دانشگاه کشاورزی و منابع طبیعی گرگان | ||
| چکیده | ||
| در این بررسی، تنوع منطقهای ویژگیهای رشد و ساختار سن ماهی سفید رودخانهای در حوضه جنوبی دریای خزر از فروردین تا خرداد سال 1390 مورد مطالعه قرار گرفت. مجموع 958 قطعه ماهی از سه اکوسیستم گلستان (منطقه 1)، مازندران (منطقه 2) و گیلان (منطقه 3) صید گردید. در حوضه خزر جنوبی، دامنه طول و وزن کل نمونهها بهترتیب 00/30-00/22 سانتیمتر و 70/347-62/138 گرم بود. در هر سه منطقه، سن برای جنس نر از +0 تا +5سال و برای جنس ماده از +0 تا +6 سال مشاهده شد. پارامترهای رشد وان برتالانفی در بین جنسهای مشابه مناطق مختلف و بین نر و ماده هر یک از مناطق، مقادیر متنوعی را نشان داد. طول بینهایت جنس ماده منطقه 3 دارای مقادیر بزرگتر (cm97/38L∞=) بود. بر اساس مقادیر (b)، در هر دو جنس (بجز جنس نر در منطقه 1) الگوی رشد آلومتریک مثبت را نشان دادند. بیشترین مقدار ضریب وضعیت برای جنس نر در خرداد ماه مشاهده گردید. نتایج نشان داد که جنس ماده از مقدار رشد لحظهای بالاتری برخوردار است. | ||
| کلیدواژه‌ها | ||
| ماهی سفید رودخانهای؛ رشد؛ سن؛ سواحل جنوبی دریای خزر | ||
| عنوان مقاله [English] | ||
| Investigation of age structure and growth characteristics of Chub Squalius cephalus (Linnaeus, 1758) in the Southern Caspian basin | ||
| نویسندگان [English] | ||
| M Alizadeh1؛ R Patimar2؛ A Abdoli3؛ M Farhangi4؛ H Adineh5 | ||
| چکیده [English] | ||
| This study was conducted to determine regional variation in growth characteristics and age structure of Squalius cephalus (Linnaeus, 1758) in the Southern Caspian Sea basin from April to June 2011. A total of 958 specimens from 3 areas including: Golestan (area 1), Mazandaran (area 2) and Guilan(area 3) were collected. In southern Caspian basin, the total length and weight of specimens ranged 22.00-30.00 cm and 138.62-347.70 g, respectively.The ages ranged from 0+ to 5+ years for males and from 0+ to 6+ years for females in all sampling areas. Parameters of von Bertalanffy growth function were different between males and females of each area and between the same sexes of different areas. The largest L∞ was found in the area 3 for female (L∞=38.97 cm).According to b values obtained, both sexes (except males of station 1) show a positive allometric growth. The highest values of condition factor were observed for males in early June. The result indicates that higher value of growth rate was for females. | ||
| کلیدواژه‌ها [English] | ||
| Squalius cephalus, growth, Age, Southern Caspian basin | ||
| مراجع | ||
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