مقایسه جمعیتهای ماهی واسپی Cabdio morar (Hamilton, 1822) در حوضه‌های ماشکیل و مکران بر اساس صفات شمارشی و ریخت‌سنجی هندسی

نوع مقاله : مقاله پژوهشی

نویسندگان

چکیده

ریخت‌سنجی هندسی لندمارک-پایه و مقایسه صفات شمارشی با هدف درک الگوی تفاوت‌های بالقوه بین دو جمعیت ماهی واسپی از دو حوضه ماشکیل و مکران انجام شد. برای این منظور تعداد 97 قطعه ماهی واسپی شامل 64 قطعه از رودخانه ماشکیل (حوضه‌های ماشکیل) و 33 قطعه از رودخانه سرباز(حوضه مکران) صید شدند. پس از ثبت صفات شمارشی، از نیم‌رخ چپ ماهیان عکس‌برداری به عمل آمده و تعداد 14 لندمارک بر روی تصاویر دو بعدی انتخاب و رقومی سازی شدند. صفات شمارشی و داده‌های شکلی حاصله پس از آنالیز پروکراست (روی هم گذاری)، با استفاده از روش‌های آماری چند متغیره PCAو DFAمورد تجزیه‌وتحلیل قرار گرفتند. از نظر شکلی، تفاوت معنی‌داری بین دو جمعیت مورد مطالعه مشاهده شد (001/0>P). ماهیان رودخانه سرباز دارای ارتفاع بدن و ارتفاع ساقه دمی بیشتر اما طول ساقه دمی کمتری بود. با توجه به عدم تفاوت در صفات شمارشی و از طرفی تفاوت شرایط رودخانه‌های مورد مطالعه (تراکم پوشش گیاهی، عمق آب، شدت‌جریان آب و مقدار غذای در دسترس)، تفاوت‌های مشاهده شده را می‌توان حاصل پاسخ‌های انعطاف‌پذیری ریختی به شرایط زیستگاهی رودخانه‌ها در نظر گرفت.

کلیدواژه‌ها


عنوان مقاله [English]

Geometrics morphometric comparison of populations of Waspi Cabdio morar (Hamilton, 1822) in Mashkil and Mokran Basins

نویسندگان [English]

  • M. Zamani Faradonbeh
  • S. Eagderi
  • M. Nasri
چکیده [English]

Landmark based geometric morphometrics and comparison of meristic characters was used to understand potential differences between populations of Waspi in Mashkil and Mokran Basins. 97 specimens of Waspies were caught (64 from Mashkil River and 33 from Sarbaz River). 14 landmarks were digitized on pictures taken from left side of specimens and meristic characters were counted. Data were analyzed using PCA and DFA after procrustes superimposition and data standardization. There are some meaningful shape differences between populations (P<0.001). The body and caudal peduncle in Sarbaz fishes where higher than that of Mashkil fishes, but the peduncle in Mashkil River was longer than Sarbaz fishes. Considering to no meaningful differences between the two populations in meristic characteristics and Due to different conditions in the rivers (vegetation density, water depth, water flow and food availably), the observed differences in shape of fishes could be considered as phenotype .....

کلیدواژه‌ها [English]

  • phenotype plasticity
  • geometric morphometrics
  • Waspi
  • Cabdio morar
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