Abstract
AbstractThe study of the morphological characteristics of the Gobio gobio population from the Berd’ River (the tributary of the Upper Ob’, Western Siberia) was carried out in order to expand the information on morphometry variability of gudgeon populations at Northeast Asia territory and to clarify the taxonomic status of the Siberian population. The variability of the exterior and counting characteristics of fish reflect sexual dimorphism in association with length of the fins (in % of the body length). Females differ from males in elongated ventral fins, shorter dorsal and pectoral fins. In addition to longer dorsal and pectoral fins, males are characterized by higher caudal part of the body. The results of cluster analysis reflect high similarity of taxonomically significant traits of fish from Western Siberia [from Upper Ob’ and Yenisei rivers] compared to spatially distant populations of northeastern Asia [from the Lena and Amur rivers]. The results of the analysis showed that in order to test the hypothesis about the current status of species / subspecies inhabiting the regions of Siberia and the Far East, it is necessary to compare the indicators of molecular genetic variability of the studied groups.Keywords Gobio gobio PopulationMorphological variabilitySexual dimorphismTaxonomic statusOb’ RiverWestern Siberia
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