On the other hand, the Sevan trout itself has been successfully introduced to Issyk Kul lake in Kyrgyzstan.

[3] The Sevan trout has four[3][2] (or two[4]) distinct strains differing in their breeding time and place, and growth rate: The winter bakhtak is the largest form and can grow to considerable size, up to 90 cm and 15 kg.

[3] Gegharkuni is a migratory form that naturally breeds exclusively in rivers; it also feeds on plankton in addition to benthos.

[3] Bojak in turn is a dwarfed form that breeds within the lake in the winter, and does not exceed 33 cm and 0.25 kg.

[3] From a study of historical samples, the four strains or forms are not diagnosable by their mitochondrial DNA sequences.