BIOLOGIYA MORYA, 2015, Vol. 41, No. 6, pp. 403-417

Parasalmo mykiss (Walbaum, 1792) (Salmoniformes: Salmonidae) from the Shantar Islands: population structure and phenetic and genetic diversity

© 2015 M. A. Gruzdeva, M. Yu. Pichugin, K. V. Kuzishchin, S. D. Pavlov, M. N. Melnikova

M.V. Lomonosov Moscow State University, Moscow 119991

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This paper deals with the biological peculiarities of the mykizha Parasalmo mykiss (Walbaum, 1792) from the Shantar Islands. P. mykiss inhabits only the Srednyaya and Olenya rivers out of six rivers of Bolshoi Shantar Island. Based on the scale structure, three phenotypes with different life-history patterns were found: riverine, riverine estuarine, and estuarine. Data on distribution, size and age composition, and feeding are provided. The external morphology and the structure of bones of the skull are analyzed. The phenetic relationships are examined based on the analyses of external body morphology, skull morphology, and population genetics. The origin and status of P. mykiss from the Shantar Islands is discussed.

Key words: Parasalmo mykiss, Shantar Islands, life-history pattern, age, morphology, skull morphology, population genetics, phenetic relationships, isolation.