Life Strategies of Mykiss Parasalmo mykiss
and Trout Salmo trutta Introduced in Water Bodies of Chili

D. S. Pavlov^a, K. A. Savvaitova^b, K. V. Kuzishchin^b,
M. A. Gruzdeva^b, and S. D. Pavlov^b

^a Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071 Russia

^b Moscow State University, Vorob’evy Gory, Moscow, 119899 Russia

a e-mail: director@sevin.ru

Received December 5, 2006

Abstract—Materials of preliminary investigations of the life strategy of mykiss Parasalmo mykiss and trout
Salmo trutta introduced to water bodies of Chili are considered. Analysis of the structure of scales demonstrated
that, in mykiss and trout, the estuarine and riverine–estuarine types of life strategy prevail. This seems to be
related to good feeding conditions in fjords. The hypothesis is suggested that, in the area of Chilean fjords, the
successful introduction to rivers and artificial rearing in cages in brackish water resulted in the formation of a
peculiar and highly dynamic population system. Elements of this system are from both fish of natural self-
reproducing populations and fish grown in cages. There is a continuous exchange with genetic information
between them as the fish that have escaped from cages attain maturity, arrive to rivers for spawning, and repro-
duce together with wild fish.

DOI: 10.1134/S0032945207060021

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