Namak chub (Squalius namak Khaefi et al., 2016) is an endemic fish species in the inland waters of Namak Lake basin in central Iran. To investigate the patterns and the form changes using geometric morphometric methods, 77 specimens were collected from three rivers of the Namak basin. After anesthetizing in 1% clove oil solution and fixing in 10% neutralized formalin, the specimens were transferred to the Isfahan University of Technology Ichthyology Museum (IUT-IM) for further studies. Some 13 landmarks were made on the photographs taken from the left side of the fish to extract data from body for geometric morphometric analysis using digitization TpsDig2 software. Defined data, after Procrustes Analysis, were analysed by principal component analysis, canonical variate analysis and cluster analysis. The results showed that there were significant differences among the studied populations (P<0.0001). Much of these differences are related to the head, mouth position, body depth, anal fin position and width of the caudal fin. This indicates that the there is a polymorphism associated with populations habitat conditions. The streamlined body shape was seen among populations as a common feature that for chub species was considered as an advantage in rivers.
کلید واژگان :Morphometric, Landmark, Procrustes, Morphological patterns
ارزش ریالی : 350000 ریال
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