Mechanisms of the Adaptation of the Kildin Cod Gadus morhua kildinensis Derjugin, 1920 (Pisces: Gadidae) to the Specific Conditions of Lake Mogilnoyeстатья
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Аннотация:The mechanisms of the adaptation of the Kildin cod to the conditions of a meromictic lake were
analyzed based on the study of morphological, biological, and genetic characteristics. Significant differences
between the Kildin cod and Atlantic cod have been found in their morphological and genetic characteristics.
The results of an X-ray microanalysis of otoliths, which were conducted for the first time, confirm that the
distribution range of the Kildin cod in Lake Mogilnoye also extends to brackish waters. It has been shown that
the formation of the reproductively isolated lacustrine population of Kildin cod is accompanied by specialization
in a number of characteristics (body color, feeding strategy, behavior, etc.) and by a decrease in genetic
diversity.