Showing 6 results for Morphometric
Maryam Nasrolah-Pourmoghadam, Soheil Eagderi,
Volume 3, Issue 2 (10-2013)
Abstract
Temperature as an environmental factor, play important role in fish life. Angel fish (Pterophyllum scalare) is one of the most popular fish species that its production has developed in the ornemental fish industery and there is little information about the effect of rearing temprature in the aquarium. Hence, this study was carried out to investigate the effect of temperature on its body shape during the early development using geometric morphometric approach. In total sixty newly hatched larvae reared in two temperature treatments (16 and 28oC) for a period of one month. Then the left side of the specimens were photographed and fourteen landmark points defined and digitised on 2D picture using tpsDig2 sotware to extract body shape data.The extracted data after GPA analysis, were analyzed using DFA and p value of permutation test with ten thousand repetitions. The results revealed significant different between body shape of two treatments showing higher body depth and fusiform body shape, lower caudal peduncle depth and a longer head length in higher temperature. The results confirmed that temperature as important environmental parameter impacts and regulate the body shape of angel fish during early oncogenic development.
Roghayeh Alizadeh, Ehsan Kamrani, Mohsen Safaei, Mohamad Momeni, Omolbanin Taheri Kondar,
Volume 3, Issue 2 (10-2013)
Abstract
Indian sandwhiting Sillago sihama from family Sillaginidae is food acceptability in Hormozgan province. 1204 samples were collected from Coastal Waters of Bandar Abbas by encircling gill net and vessels from July 2011 to July 2012 and 884 samples were investigated for length- length and length-weight relationships.The results indicated that the length-length and length-weight relationships specially total length- standard length relation in the male (r2= 0.948) and in the female (r2=0.949), total length-weight relation in the male (r2= 0.932) and in the female (r2=0.927), standard length- weight relation in the male (r2= 0.907) and in the female (r2=0.912) were highly correlated (P<0.05).
The relationship between total length and weight can be expressed in the male as: y = 0.008x 2.942
and in the female y = 0.008x 2.952 and The relationship between standard length and weight in the male as: y = 0.023x 2.776 and in the female y = 0.016x 2.897 which indicates that Sillago sihama, has isometric growth.
Sara Haghparast, Rasul Ghorbani, Abdol Rasul Salman Mahini, Hasan Fazli, Vali-Alla Jafari, Rahman Patimar, Shaban Najaf Pour,
Volume 4, Issue 3 (1-2015)
Abstract
This study was conducted to investigate morphometric variation and differentiation in common kilka (Clupeonella cultriventris) caught from Amir Abad and Babolsar fishing ports during winter 2013. Totally, 330 specimens (272 specimens from Amir Abad port and 58 specimens from Babolsar port) were caught by lift net and 30 absolute morphometric traits, 9 meristic traits, length and gonad, body weights were measured. Results of Two-way analysis of varience on standard morphometric traits indicated significant interactions between sampling stations and fish gender (P<0.05). Male and female specimens showed significant differences between stations in 74 and 48% of traits, respectively (P<0.05). Specimens of male and female caught from Babolsar port had more length and weight in contrast to their counterparts in AmirAbad. Results of DFA and scatter polt diagram of principle components (PCA) did not confirm the existence of distinct common kilka stocks at Amir Abad and Babolsar stations and sexually dimorphic between male and female individuals. Overally, morphometric traits could better explain differentiation of common kilka studied in the area.
Alireza Radkhah, Soheil Eagderi,
Volume 4, Issue 4 (4-2015)
Abstract
This study aimed to the first report of Saw-belly, Hemiculter leucisculus from the Zarinehrud River and investigation of its morphometric and meristic characteristics, length-weight and length-length relationships. A total of 77 saw-belly specimens were caught on September 2013 from the Zarinehrud River. Twenty-one morphometric and 10 meristic characters were examined. The total length and weight ranges were 66-142 mm and 1.7-30.27 g, respectively. The parameter b of 3, indicating its isometric growth pattern. Regarding the observed species diversity and presence of 6 other exotic fish species in this River, the saw-belly has probably introduced to this river with commercially cyprinid species from the Caspian Sea basin.
Keivan Abbasi, Atta Mouludi-Saleh, Soheil Eagderi, Alinaghi Sarpanah,
Volume 10, Issue 4 (3-2021)
Abstract
This study aimed to compare morphological variation of the two populations of the Eurasian perch (Perca fluviatilis L., 1758) from the Anzali wetland and Chamkhaleh River downstream by sampling 20 specimens from each in 2006. A total of 38 morphometric and 13 meristic characters were measured and counted. To eliminate the effects of allometric growth patterns the morphometric characteristics were standardized. The results showed a significant difference between studied populations in some morphometric and meristic traits (P<0.05). In the morphometric, eye diameter, head length, and predorsal and post dorsal-ventral lengths and in those of meristic the lateral line scales, numbers of the unbranched rays of 2ed dorsal-, anal- and ventral fins and upper gill rakers revealed significant differences between the Anzali and Chamkhaleh populations (P<0.05). The results showed that the two studied populations are separated by morphometric and meristic characters, therefore they should be considered as separate populations in future fisheries management plans.
Edris Ghaderi, Soheil Eagderi,
Volume 11, Issue 4 (3-2022)
Abstract
Oxynoemacheilus chomanicus is an endemic loach species in Choman River drainage of Kurdistan Province (Iran). In this study we evaluated the morphological variation of body shape among different population of this species from three main tributaries of Choman River; Baneh, Boein and Shooei Rivers. A total of 92 specimens were examined using geometric morphometric method. Using the photographs from the left side of specimens 14 landmarks and 2 semi-landmarks points were selected and analyzed using PCA and CVA methods. Results obtained indicated significant differences between studied populations, especially in head, caudal peduncle and dorsal fin base parts of the fish body.
