animal
zaniar ghafouri; Soheil Eagderi; Hadi Poorbagher
Abstract
This study aimed to investigate the morphological changes of Cyprinion macrostomum in the spring, summer, and autumn and their relationship with the environmental factors in the Little Zab River. For this purpose, sampling was done seasonally in 6 stations with 3 repetitions. Then, to extract morphological ...
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This study aimed to investigate the morphological changes of Cyprinion macrostomum in the spring, summer, and autumn and their relationship with the environmental factors in the Little Zab River. For this purpose, sampling was done seasonally in 6 stations with 3 repetitions. Then, to extract morphological data in the geometric morphometric method, photographs were taken of the samples and 16 landmark points were defined and digitized. Procrust analysis was used to remove non-morphic data from the landmark data. To find the pattern of shape changes and main effective factors, principal component analysis (PCA) was used. Canonical Variates Analysis and 2B-PLS analysis were used to determine the morphological distinction between the populations of sampling stations and to analyze the relationship and correlation between body shape changes and environmental variables, respectively. Based on the results, the morphological characteristics of C. macrostomum of the studied populations in different stations were different in each season. The results of PCA showed changes in the position of the mouth, dorsal fin and caudal peduncle occur in most seasons due to morphological adaptation to the environmental factors of their habitat. 2B-PLS analysis also showed a high correlation and significant difference between body shape and environmental factors in all three seasons (P=0.001, r=0.98). The results also showed a high and significant correlation between the morphological changes of C. macrostomum and the habitat factors of Little Zab River.
animal
Zahra Mehrabani; Soheil Eagderi; Hadi Poorbagher
Abstract
Intrudaction: This work was conducted to study the morphological variation of longspine scraper (Capoeta trutta) in seven populations in the Iranina sub-basins of the Persian Gulf basin, including Sirvan, Little Zab, Karun, Karkheh, Zemkan, Godarkhosh and Zohreh. Methods: For this purpose, 161 specimens ...
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Intrudaction: This work was conducted to study the morphological variation of longspine scraper (Capoeta trutta) in seven populations in the Iranina sub-basins of the Persian Gulf basin, including Sirvan, Little Zab, Karun, Karkheh, Zemkan, Godarkhosh and Zohreh. Methods: For this purpose, 161 specimens were sampled using cast-net and electrofishing device. To extract morphological data in the geometric morphometric method, photographs were taken from the left side of fish, and then 18 landmark-points were digitized on their 2D images. Results and Discussion: The results of Canonical Variate Analysis showed that Godarkhosh and Little Zab populations are separated from others. Based on the results of Mahalanobis distances between the studied populations, the maximum and minimum distances were between Tang-shive and Godarkhosh populations and Sirvan and Zemkan populations, respectively. Based on the Cluster analysis, the populations of Karkheh, Karun, Sirvan, Zemkan and Tang-shive were clustered together and Godarkhosh and Little Zab in another one. The results also showed the phenotypic plasticity of this species in adapting to different habitats in traits including depth of head, trunk and tail as well as head length, based on habitat conditions.
