Morphological and Еcological Differentiation of Sympatric Whitefishes (Genus Coregonus) from Lake Taymyr
V. I. ROMANOV1, E. I. ZUYKOVA2, N. A. BOCHKAREV2
1Tomsk State University, 634050, Tomsk, Leninа ave., 36
2Institute of Systematics and Ecology of Animals, SB RAS, 630091, Novosibirsk, Frunze str., 11
Keywords: сиг-пыжьян, C. l. pidschian, морфология, экология, оз. Таймыр, жаберные тычинки, экологическая форма, Siberian whitefish, morphology, ecology, Taymyr Lake, gill rakers, ecological form
Abstract
The results of the morphological analysis of ecology and feeding of two sympatric forms (lacustrine and lacustrine-riverine) of the whitefishes inhabiting Lake Taymyr (the Taymyr Peninsula) were presented. It was determined that these forms do not differ in the number of gill rakers on the first brachial arch and the number of lateral line scales, but do differ in plastic features, spawning period and spawning area. At 2-3 years of age the feeding preferences of different forms of whitefish begin to vary. It was supposed that both forms of whitefish occupied Lake Taymyr simultaneously with the ponding of the lake basin. Apparently, the taxonomic status of the sympatric whitefishes from Lake Taymyr is broader than the term “ecological form”.
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