مطالعه جمعیت­ های شیرماهی در دو حوضه هری­ رود و دشت‌کویر با روش ریخت­ سنجی هندسی

نویسندگان

1 گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

2 گروه علوم و مهندسی شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم آباد، ایران

چکیده
این مطالعه بهمنظور بررسی تفاوتهای ریختی چهار جمعیت گونه شیرماهی در آبهای داخلی ایران به اجرا درآمد. بدین منظور، تعداد 81 قطعه شیر ماهی از رودخانههای بیدواز، چشمهعلی،کلات و آل نمونهبرداری شد. نمونهها پس از بیهوشی در فرمالین تثبیت بافری و برای ادامه مطالعات به آزمایشگاه منتقل شدند. از سمت چپ سطح جانبی تمام نمونهها عکسبرداری شد. بهمنظور استخراج داده‌های حاصل از شکل بدن، تعداد 14 لندمارک با استفاده از عکس­های گرفته شده در نرم افزار TpsDig2 تعریف و رقومی سازی شد. ابتدا به منظور حذف اثرات ناشی از اندازه، جهت و موقعیت آنالیز پروکراست (GPA) صورت گرفت، سپس از آنالیزهای PCA، MANOVA/CVA و تحلیل خوشهای بر اساس آنالیز دادهها استفاده شد. بر اساس نتایج بین جمعیتهای مورد مطالعه تفاوت معنی­داری از نظر شکل بدن یافت شد. عمده تفاوت‌های شکل بدنی در جمعیتهای مورد مطالعه مربوط موقعیت پوزه، عمق بدن، عمق سر و طول ساقه دمی بود. این تغییرات مشاهده شده احتمالاً در اثر سازگاری با ویژگی­های محیطی زیستگاه آنها حاصل شده است.


کلیدواژه‌ها


عنوان مقاله English

The morphological study of transcaspian marinka (Schizothorax pelzami) in Harirud and Dasht-e Kavir basins using the geometric morphometric technique

نویسندگان English

Atta Mouludi-Saleh 1
Soheil Eagderi 1
Shima Latif-Nejad 1
Manoochehr Nasri 2
1 University of Tehran
2 Lorestan University
چکیده English

This study was conducted to understand the morphological variation of four populations of Schizothorax pelzami from Iranian inland waters. For this purpose, a total of 81 specimens were collected from the Bidvaz, Cheshmeh-Ali, Kalat and Aal rivers. After anesthesia, all specimens were fixed into buffered formalin and transferred to the laboratory. Then, the left sides of all individuals were photographed. To extract the body shape data, 14 landmarks-points were defined and digitized on 2D image using TpsDig2 software. To eliminate size, direction and position from data, the Generalized Procrustes Analysis (GPA) was performed. Then, PCA, MANOVA/CVA and cluster analysis were used for further investigation. The results showed that there was no significant difference but some overlapping among the studied populations on the basis of PCA analysis was observed. The CVA graph separated the studied populations from on another. The main differences in body shape of the studied populations were related to the position of the snout, the depth of head and body, and the length of caudal peduncle. The observed changes can be considered to be an adaptation to their habitat, which has been influenced by different environmental parameters.


کلیدواژه‌ها English

Bidvaz
cheshmeh-Ali
landmarks
cluster analysis
procrustes analysis
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دوره 7، شماره 2 - شماره پیاپی 24
تابستان 1399
صفحه 185-191

  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405