Morphological characters of lake forms of salmonid fishes of the genera Salmo and Oncorhynchus (Pisces: Salmonidae)
Based on a study of the morphological characteristics of the Sevang trout <i>Salmo ischchan </i>Kessler, 1877 acclimatized in Lake Issyk Kul (Kirghizia) and the lake form of the masu salmon <i>Oncorhynchus masou </i>(Brevoort, 1856) in Lake Biwa (Japan) their unique characteristics were defined. These characters allow to consider these forms as subspecies. The main directions and the rate of change of the characters with the forming of trouts and salmons in Atlantic and Pacific species in lake conditions are considered.