A. M. Kaeva and V. A. Rudnev
Sakhalin Research Institute of Fishery and Oceanography, ul. Komsomol’skaya 196, Yuzhno-Sakhalinsk, 693023 Russia
a e-mail: kaev@sakhniro.ru
Received June 16, 2005
Abstract—The results of monitoring from 1971 to 2004 of pink salmon Oncorhynchus gorbuscha spawning
in the rivers of the southeastern coast of Sakhalin are presented. It is shown that fluctuations in the value of its
return more largely depend on the level of mortality of fish of the respective generations in the marine period
of life than on the yield of downstream migrating juveniles, that, in turn, is weakly related to the numbers of
parents, which is explained by the spawning conditions in small rivers at a dense aggregation of spawners on
the spawning grounds. Stable long-term tendencies in the variation of numbers, biological indices of fish, and
the dates of their return for spawning are established. It is suggested that they indicate a decisive role of global-
cyclic, climatic-oceanological processes in the population dynamics of pink salmon
DOI: 10.1134/S0032945207030058
Pleiades Publishing home page | journal home page | top
If you have any problems with this server, contact webmaster.