Fisheries
Soheil Eagderi
Abstract
This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae) using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood ...
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This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae) using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood and Zarinehrood by electrofishing. The left side of specimens were photographed using a digital camera. Then fifteen homologous landmark points were selected and digitized on 2D pictures using tpsDig2 software. Landmark data after GPA, analyzed using PCA, CVA with obtained P-value from permutation test and cluster analysis. The patterns of population’s body shape were illustrated in relation to consensus configuration of all specimens. The results showed a significant differences between the body shape of studied populations. Based on cluster analysis, the studied populations according to their body shape were divided into Baneh clad and Saghezchai, Siminehrood and Zarinehrood clade. The Baneh, Saghezchai, and Siminehrood populations have deeper body and are distinguishable due to smaller head, posterior position of eye and shorter base of dorsal fin, respectively and Zarinehrood population was differentiable due to a more fusiform body shape and less body depth. These morphological differences can display ongoing evolutionary trends of studied populations as result of environmental conditions of their habitats and geographical isolation.
Fisheries
Zaniar Ghafouri; Soheil Eagderi; Hadi Poorbagher
Abstract
This study was conducted to investigate the sexual dimorphism of Cyprinion macrostomum in the Little Zab River using traditional and geometric morphometric methods. For this purpose, during 2021, 37 specimens (21 females and 16 males) were collected using an electrofishing device. After determining the ...
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This study was conducted to investigate the sexual dimorphism of Cyprinion macrostomum in the Little Zab River using traditional and geometric morphometric methods. For this purpose, during 2021, 37 specimens (21 females and 16 males) were collected using an electrofishing device. After determining the sex of the collected specimens, 18 morphometric characteristics were measured using a digital caliper. Also, to extract body shape data in geometric method, photographs were taken from the left sides of both males and females. Then, 16 landmark-points were digitized in tpsDig2 software. The extracted data were analyzed using multivariate statistical analysis including principal component analysis (PCA), T.tests and Mann-Whitney.The results of discriminant function analysis (DFA) and T-test of the body shape showed a significant difference between males and females (P<0.05). The males have more body depth, posterior snout, and shorter caudal peduncle length than the females. Males and females had significant differences in 8 morphometric traits (P<0.05). The results of the present study confirmed the performance of traditional and geometric morphometric methods in the differentiation of the C. macrostomum sexes.
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.
Soheil Eagderi; Fatemeh Moshaiedi; Manoochehr Nasri
Abstract
Abstract This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae)using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood ...
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Abstract This study was conducted to survey the morphological variation in four populations of the Urmia kingfish (Alburnus atropatenae)using geometric morphometric technique. A total number of 163 specimens were collected from four rivers of the Urmia Lake basin including the Baneh, Saghezchai, Siminehrood and Zarinehrood by electrofishing. The left side of specimens were photographed using a digital camera. Then fifteen homologous landmark points were selected and digitized on 2D pictures using tpsDig2 software. Landmark data after GPA, analyzed using PCA, CVA with obtained P-value from permutation test and cluster analysis. The patterns of population’s body shape were illustrated in relation to consensus configuration of all specimens. The results showed a significant differences between the body shapes of studied populations. Based on cluster analysis, the studied populations according to their body shape were divided into Baneh clad and Saghezchai, Siminehrood and Zarinehrood clade. The Baneh, Saghezchai, and Siminehrood populations have deeper body and are distinguishable due to smaller head, posterior position of eye and shorter base of dorsal fin, respectively and Zarinehrood population was differentiable due to a more fusiform body shape and less body depth. These morphological differences can display ongoing evolutionary trends of studied populations as result of environmental conditions of their habitats and geographical isolation.
