جستجوی مقالات مرتبط با کلیدواژه « جویبارماهی » در نشریات گروه « شیلات »

During 2018-2019, to study the morphological diversity of Oxynoemacheilus elsae, a total of 51 specimens were collected from the Godarchai, Barandozchai, Zarrinehrood and Mahabadchai rivers, Urmia Lake basin using electrofishing. From the collected samples, 22 morphometric characteristics were measured using a digital caliper with an accuracy of 0.1 mm. Also, in geometric morphometric (GM) method, the side of the samples were photographed, and 14 landmarks were digitized using tpsDig2 software. The extracted data were analyzed to understand morphological variation between the studied populations using multivariate analysis i.e. PCA, MANOCA /CVA and cluster analysis. The results showed a significant difference between the studied populations in terms of the morphological characters (P<0.05). In traditional method, there were significant differences in 10 traits between the studied populations (P<0.05). The main differences in GM method were related to the body and head depth, mouth position and caudal peduncle height. The observed morphological variations show the high adaptability of this species, especially in the pectoral fin length and body height traits with habitat adaptation.

Oxynemacheilus bergianus is found in several inland water basins of Iran. Due to its wide distribution, this study was conducted to investigate its morphological variation in basins of Caspian Sea and Namak Lake of Iran using geometric morphometric technique. For this purpose, a total of 115 specimens from five river (Sefid and Ghezel Ozan (Caspian Sea basin), Jajrood, Kordan, Qom (Namak Lake basin)) were caught and compared using geometric morphometric method. The results indicated a completely different body shape patterns in the studied populations. The results also showed a significant difference between the body shape of the studied and groups the most differences were related to tail length and depth, body depth, head length and position of the dorsal, anal and pectoral fins. The observed shape patterns can indicate habitat-dependent morphological separation and geographical distances that the geometric morphometric method was highly capable of separating morphological features due to their high capability.