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 globalcyclic, climatic-oceanological processes in the population dynamics of pink salmon
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Original Russian Text © A.M. Kaev, V.A. Rudnev, 2007, published in Voprosy Ikhtiologii, 2007, Vol. 47, No. 2, pp. 215–227.
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Kaev, A.M., Rudnev, V.A. Population dynamics of pink salmon Oncorhynchus gorbuscha (Salmonidae) from the southeastern coast of Sakhalin island. J. Ichthyol. 47, 228–240 (2007). https://doi.org/10.1134/S0032945207030058
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DOI: https://doi.org/10.1134/S0032945207030058