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.
Shahram Nematollahi; Alireza Shayestehfar; Alireza Pesarakloo
Abstract
In animals, Sexual dimorphism can be based on morphological characteristics or measurable characteristics. In scorpion, except a few species that have two sexual forms, there is no significant difference between males and females. In this study, 12 measurable characteristics of male and female Hottentotta ...
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In animals, Sexual dimorphism can be based on morphological characteristics or measurable characteristics. In scorpion, except a few species that have two sexual forms, there is no significant difference between males and females. In this study, 12 measurable characteristics of male and female Hottentotta saulcyi, from the Rudbar area located on the border of Lorestan, Isfahan and Chaharmahal and Bakhtiari provinces, were measured and analyzed by SPSS 16 software. Independent Sample T-test showed a significant difference between the three traits, the distance between the two shoulder lines, shoulder length, and the number of shoulder teeth between males and females. The result showed that in male, the length of the shoulder is significantly larger and also the number of shoulder teeth more than female, but the distance between the two shoulder strains in the material is larger than the male, and therefore, these traits can be in the diagnosis of both males and females.
Vida Hojati; Mahsa Malekmohammadi Kalahroudi; Soheila Rahmani
Volume 6, Issue 2 , December 2017, , Pages 55-63
Abstract
Black-tailed toad agama (Phrynocephalus maculatus maculatus) is one of the rare diurnal lizards belonging to Agamidae family that have been distributed in deserts and sandy areas in central and southern parts of Iran. This research was conducted in order to the study of sexual dimorphism in this species ...
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Black-tailed toad agama (Phrynocephalus maculatus maculatus) is one of the rare diurnal lizards belonging to Agamidae family that have been distributed in deserts and sandy areas in central and southern parts of Iran. This research was conducted in order to the study of sexual dimorphism in this species from April to August, 2013. Totally, 30 adult specimens including 15 males and 15 females were collected from four stations: Hasan Abad, Aliyan, Saleh Abad and Yazdan Abad in southern parts of Damghan County in daily patrols by hand. Results of present study showed that males and females of this species are not significantly different in body weight, body length, tail length, head length, head width, right and left supralabial and infralabial scales, and scales around the mid- body (p< 0.01). Also, no significant differences were observed in body coloration and shape and arrangement of scales in both sexes. Therefore, there is no sexual dimorphism in the studied characters in Phrynocephalus maculatus maculatus in this area.
