Morphological features variability in invasive populations of rotan (Perccottus glenii Dybowski, 1877) in the Ishim River basin

Tyumen State University Herald. Natural Resource Use and Ecology


2019, Vol. 5. №1

Morphological features variability in invasive populations of rotan (Perccottus glenii Dybowski, 1877) in the Ishim River basin

For citation: Levykh A. Yu., Usoltseva Yu. A., Tsalikova I. K. 2019. “Morphological features variability in invasive populations of rotan (Perccottus glenii Dybowski, 1877) in the Ishim River basin”. Tyumen State University Herald. Natural Resource Use and Ecology, vol. 5, no 1, pp. 100-115. DOI: 10.21684/2411-7927-2019-5-1-100-115

About the authors:

Alyona Yu. Levykh, Cand. Sci. (Biol.), Associate Professor, Head of the Department of Biology, Geography, and Methods of Teaching, University of Tyumen (Ishim Branch);

Yuliya A. Usoltseva, Master Degree Student, Department of Zoology and Evolutionary Ecology of Animals, University of Tyumen;

Ida K. Tsalikova, Cand. Sci. (Philol.), Associate Professor, Department of Russian and Foreign Philology, Cultural Studies and Methods of Their Teaching, University of Tyumen (Ishim Branch);


This article presents the results of studying the intrapopulational and interpopulation variability of the morphological features of the invasive species of Perccottus glenii in the populations from the water bodies of the Ishim River Basin. In 150 individuals, the author studied 2 meristic characteristics (the number of rays in the pectoral and ventral fins), defining the stability of development, and 30 size and weight characteristics, which define the overall dimensions and proportions of the body. A one-dimensional statistical analysis of samples of P. glenii from different reservoirs, followed by inter-sampling comparison based on using Student’s t-test, showed that the studied populations are characterized by high variability of morphometric features and body weight. There are statistically significant differences in common sizes and proportions of the body between even-aged samples from different populations. This determines the peculiarity of the phenotypic structure of the studied populations. Interpopulation phenotypic differences are most pronounced in younger age groups and are lessened with age. Older age groups differ from younger ones by a significantly smaller range of variability of size and weight characteristics.

Factor analysis showed that the age variability of morphometric characteristics and body weight is nine times higher than the biotopic one. Both studied populations are characterized by high stability of development, which indicates a good quality of habitat. The favorable habitat conditions for the species in the studied reservoirs are also indicated by larger average sizes of the corresponding age groups in the studied populations as compared with the populations in the maternal range. However, growth rates vary in different populations and depend on the biotopic features of aquatic ecosystems, which indicates the adaptive nature of the observed variability. The results obtained are preliminary and can be used as supplement information on the state of invasive populations of P. glenii in Western Siberia.


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