Abstract
The species Parasalmo ( Oncorhynchus) mykiss (Kamchatka mykiss; mykiss) belongs to salmonid fish (Salmonidae family) and has a complex population structure; it is widely spread and characterized by a high rate of microevolution. Mykiss has been exten� sively studied by many researchers for a long time. The wild anadromous form of this species is recorded in the Red Data Book, while the residential form is an exten� sively used object of aquaculture. Populations inhabiting the Kamchatka part of the Parasalmo (O.) mykis area are the least studied because of poor accessibility of this habitat. A low anthropo� genic load of Kamchatka ecosystem enables the researcher to study the natural gene pool of the spe� cies, which is of special importance. The genetic fea� tures of Kamchatka mykiss have been only recently studied, and the population genetic reports are scarce. Some of them suggest that the genetic markers and methods used by American researchers in studying North American mykiss are inefficient in studying of phylogenetic relationships of Kamchatka populations [1–4]. According to previous reports, the Kamchatka group proved to be monophyletic and poorly differen�
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