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1 | . // Tomsk State Pedagogical University Bulletin. 1999. Issue 7 (16). P. 38-43 . | 944 | ||||
2 | The article investigates morphological differences between mass chars (Salvelinus) of the Khantayskoe Lake {Taimir peninsula). It was determined that evident differences were found in most plastic (more than 70 %) and meristic indices. Some of these differences have reached the level of subspecies differentiating indices (CD). Issues of protection of mass and rare forms of chars in this water reservoir are also discussed in this work. | 1013 | ||||
3 | The ichtyofauna of Lake Taimyr includes two forms of the Siberian whitefish Coregonus lavaretuspidschian, a lake species with a higher body shape and a river-lake species with a lower body shape, both as described by Mikhin in 1955. Mikhin found that these forms are not only in Lake Taimyr, but also in its influxes. These species differ in nutrition preferences. The lake whitefish is a bottom-feeder while the river-lake whitefish is a predator. Study of the morphology of these species revealed considerable differences in number of vertebrae and a majority of other plastic indices. Based on body height, length of pectoral fin, and length of the upper jaw, the differences between the two species exceed the subspecies level of Meier's CR criteria chart. Keywords: lake Taimyr, charr, sympatry, nutrition, species, morphology, differences | 1116 | ||||
4 | The article addresses changes in the fauna of the river Tom basin in the last 90 years, starting from the last century’s second decade in this work data on areas of distribution, certain size, weight and reproductive characteristics are shown. The authors discuss disappearance of pydschjan and tugun from the area. As a result of planned acclimatization efforts in the river Ob, at least 5 species were introduced to river Tom’s ichthyofauna. While in the dawn of research, salmonidae fishes were dominant species, in the present time, the basin is heavily populated by cyprinidae and percidae. Keywords: river Tom, ichthyofauna, introduced species, changes in fish population, distribution of species | 1199 |