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New Data about the Distribution of Three Phylogenetic Lineages of Arctic Charr Salvelinus alpinus (Salmonidae) in their Contact Zones in the North of East Siberia

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Article Fisheries

Morphological and Ecological Differentiation of Sympatric Forms of Arcrtic Charr Salvelinus alpinus (Salmonidae) in Lake Tokko (Northern Transbaikalia)

S. S. Alekseyev et al.

Summary: Based on data from 1997-2019, the study focused on the morphology, growth, feeding, reproduction and early development of Arctic charr from Lake Tokko. It was found that the large form disappeared, the small form became rare, and the dwarf form became highly abundant in recent years. The results suggest substantial reproductive isolation between the dwarf and small forms, with a possible increase in introgressive hybridization due to human impacts on population structure.

JOURNAL OF ICHTHYOLOGY (2021)