Journal of Fisheries Science and Technology

Journal of Fisheries Science and Technology

Morphological variation of Oxynoemacheilus bergianus (Derzhavin, 1934) from the Namak Lake and Caspian Sea basins using traditional morphometric method

Document Type : Original Research

Authors
Shadieh Mohammadi
Soheil Eagdari
Hadi Pourbagher
Ata Moloudi
Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
Abstract
In this study, the morphological variation of Oxynoemacheilus bergianus was studied in the different rivers of the Namak Lake and Caspian Sea basins using traditional morphometric method. For this purpose, a total of 76 specimens were collected from eight river systems and after fixation into 4% buffered formalin, transfered to the laboratory, a total of 31 morphological characteristics were measured using digital calipers. After standardization, the morphometric data were analyzed using multivariate analysis including principal component analysis (PCA), canonical variate analysis with p-value obtained from MANOVA (MANOVA/CVA) and cluster analysis (CA). The results showed significant differences in 24 traits between the studied populations (P<0.05), which anal fin depth and the ventral-anal fin distances were main discriminative ones. CVA analysis was able to separate the studied populations. Also, CA placed the Gharesu and Sefid populations in a clade and separate from other populations. The observed differences may be related to phenotype plasticity in response to environmental conditions.
Keywords
Oxynoemacheilus bergianus
morphology
Phenotype plasticity
Cluster Analysis

Subjects

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Journal of Fisheries Science and Technology
Volume 9, Issue 4 - Serial Number 32
Autumn 2020
Pages 285-292