Research in Zoology
p-ISSN: 2325-002X e-ISSN: 2325-0038
2017; 7(1): 1-6
doi:10.5923/j.zoology.20170701.01
Atta Mouludi Saleh, Yazdan Keivany, Seyed Amir Hossein Jalali
Department of Natural Resources (Fisheries Division), Isfahan University of Technology, Isfahan, Iran
Correspondence to: Yazdan Keivany, Department of Natural Resources (Fisheries Division), Isfahan University of Technology, Isfahan, Iran.
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This work is licensed under the Creative Commons Attribution International License (CC BY).
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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.
Keywords: Morphometric, Landmark, Procrustes, Morphological patterns
Cite this paper: Atta Mouludi Saleh, Yazdan Keivany, Seyed Amir Hossein Jalali, Geometric Morphometric Comparison of Namak Chub (Squalius namak, Khaefi et al., 2016) in Rivers of Lake Namak Basin of Iran, Research in Zoology , Vol. 7 No. 1, 2017, pp. 1-6. doi: 10.5923/j.zoology.20170701.01.
Figure 1. The sampling locality of Squalius namak populations in Namak lake Basin (A: Jajrud, B: Ghinercheh, C: Qomrud) in Iran |
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Figure 3. Principal component analysis and the scatter plot of Joliffe cut-off point (red line), which represents the principal components significant border in populations |
Figure 4. Principal components analysis chart of body shape of chub (Squalius namak) populations in the rivers of Namak basin |
Figure 5. Canonical Variate Analysis of body shape in Squalius namak populations in Namak basin |
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Figure 6. Body shape cluster analysis in Squalius namak populations of Lake Namak basin |