Atta Mouludi-Saleh; Soheil Eagderi; Keivan Abbasi
Abstract
This study was conducted to study sexual dimorphism of Caspian kutum, Rutilus kutum collected from the Rudsar coast and Anzali Wetland, Guilan Province. After collecting, the left lateral face of the fresh specimens were photographed, then 13 Landmark-points were defined and digitized using tpsDig2 software. ...
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This study was conducted to study sexual dimorphism of Caspian kutum, Rutilus kutum collected from the Rudsar coast and Anzali Wetland, Guilan Province. After collecting, the left lateral face of the fresh specimens were photographed, then 13 Landmark-points were defined and digitized using tpsDig2 software. Generalized procrustes analysis was performed to eliminate non-shape effects, including size, direction and position. Then date was analyzed using principal component analysis (PCA) and discriminant function analysis (DFA) based on P-value obtained from Hoteling’s t-test. The results showed a significant difference in the body shape of the male and female (P<0.05). The observed differences confirm the presence of the sexual dimorphism in the study species during reproductive season. The observed morphological can be shown presence of the sexual dimorphism in this species. Based on the findings, the females have deeper body and smaller head, which can related to reproductive performance of each sex.
Yazdan Keivany; Atta Mouludi Saleh; Seyed Amir Hossein Jalali
Volume 7, Issue 1 , September 2018, , Pages 107-118
Abstract
Abstract In order to evaluate the biometry of chub (Squalius namak, Khaefi et al., 2016) populations in Khaznagh, Ghinercheh, Gharechae, Jajrud and Ghomrud rivers of Lake Namak Basin, 129 specimens were captured by a seine nets in 2010-2011. After anesthetizing in 1% clove oil solution and fixing in ...
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Abstract In order to evaluate the biometry of chub (Squalius namak, Khaefi et al., 2016) populations in Khaznagh, Ghinercheh, Gharechae, Jajrud and Ghomrud rivers of Lake Namak Basin, 129 specimens were captured by a seine nets in 2010-2011. After anesthetizing in 1% clove oil solution and fixing in 10% neutralized formalin, specimens were transferred to the laboratory for further studies. Some 14 meristic characters were counted under a stereomicroscope. To extract data for morphometric characteristics, 19 distances were measured on images in ImageJ software. To reduce the effects of allometric growth, morphometric data were standardized. To analyze the differences among the populations, Kolmogorov-Smirnov, Kruskal-Wallis, ANOVA, Duncan test, PCA, CVA and Cluster analyses were used. The morphometric characteristics separated Gharachai population from Khaznagh and Qomrud in PCA and CVA Analyses. But meristics were overlapping with each other in the studied populations, and there was no significant differences among them. The result showed that some morphometric characteristics are well able to distinguish some populations of S. namak.
