Yu. N. Poltev
Sakhalin Research Institute of Fishery and Oceanography (SakhNIRO), ul. Komsomol’skaya 196,
Yuzhno-Sakhalinsk, 693023 Russia
e-mail: poltev@sakhniro.ru
Received April 27, 2005
Abstract—Spatial distribution of Pacific cod Gadus macrocephalus inhabiting waters off the eastern coast of
the northern Kuril Islands and the southern part of Kamchatka has been studied. It is shown that the redistribu-
tions of densities of the aggregation of cod during the year occur mainly within the area under consideration.
The absence of considerable migrations of cod is related, in particular, to sufficient food availability of abundant
hydrobionts: for small-sized groups of cod, the main food are juvenile wall-eyed pollack Theragra chalco-
gramma and, for medium-sized and large-sized groups, its adult individuals and also Atka mackerel Pleuro-
grammus monopterygius and squid Belonella borealis.
DOI: 10.1134/S0032945207090068
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