Аuthors: V. E. TUNЕV, senior researcher,
State Fish Center (33 Odesskaya Str., 625023, Tyumen; tel: +7 (3452) 41-58-03),
N. V. YANKOVA, candidate of biological sciences, senior research fellow, associate professor,
S. S. GRIGORYEV, junior researcher, graduate student,
State Fish Center (33 Odesskaya Str., 625023, Tyumen; tel: +7 (3452) 41-58-03),
State Agrarian University of Northern Urals (7 Republic Str., 625003, Tyumen; tel: +7 (3452) 46-16-43)
Abstract: The analysis of the variability of morphological characters Taz peled in various hydrological conditions for years, it is allocated for three years with the accumulated cumulative potential for high, medium and low water content. It was concluded that peled of Taz River in different years under the terms of the range is characterized by low variability of meristic and plastic characters and fit into the range of values that are typical representatives of the species. Comparative analysis of Taz peled with other populations of the Ob-Taz basin revealed that Taz peled population is characterized by certain morphological features and locally isolated from peled inhabiting other spawning rivers Ob-Taz basin. Based on the analysis of meristic characters found that most of the Taz River with peled similar peled of Pur River, they form one cluster, another cluster forms a population peled of Ob basin. Cluster analysis revealed signs of plastic considerable divergence of morphological characters peled of Taz River with other streams it is not included in the cluster formed by other rivers. In this case, the closest, as in the analysis of meristic characters, peled Pur River, but the maximum distance characterizes samples from rivers Taz and North Sosva of the most geographically distant points of the study. Dendrogram of cluster analysis combined all morphometric characteristics most closely matches the samples near the geographical association mutual arrangement of items of research. Thus, the variability of morphometric parameters of Taz River peled is a consequence of the interaction of the genotype of the population and changing environmental conditions.
Keywords: Taz River, variability, morphological characteristics, multivariate statistical analysis.
