Some issues of dynamics for the herd of pink salmon Oncorhynchus gorbuscha in the Aniva Bay (Sakhalin Island)
https://doi.org/10.26428/1606-9919-2025-205-448-471
Abstract
Results of monitoring on the pink salmon spawning in the rivers of Aniva Bay (southern Sakhalin Island) in 1975–2004 are presented, including dynamics of the fish run to the coast and the number of spawners on the spawning grounds, biological parameters of the spawners, and quantitative accounts of the juveniles migrated downstream the monitored rivers. Based on these data, the total number of parent fish, juveniles, and returning adults are estimated for each year-class and the reproduction efficiency of pink salmon in the freshwater and marine periods of their life are calculated. Dynamics of pink salmon abundance in the Aniva Bay and dominance of the generative line of odd years were mostly determined by factors acting during the marine period of life, that’s why the number of returned adults depended more on the number of juveniles than on the number of producers on the spawning grounds.
Keywords
Supporting agencies: The authors are thankful to all colleagues in Sakhrybvod and SakhNIRO who took part in collecting the pink salmon samples and conducting biological analyses, as well as in the quantitative accounting of the spawners and juveniles migrating downstream in the monitoring rivers.
About the Authors
A. M. Kaev
Sakhalin branch of VNIRO (SakhNIRO)
Russian Federation
Russian Federation
Alexander M. Kaev, D.Biol., principal researcher
196, Komsomolskaya Str., Yuzhno-Sakhalinsk, 693023
S. S. Makeev
Sakhalin branch of Glavrybvod (Sakhrybvod)
Russian Federation
Russian Federation
Sergey S. Makeev, head of department
43a, Emelyanov Str., Yuzhno-Sakhalinsk, 693006
P. S. Sukhonos
Sakhalin branch of Glavrybvod (Sakhrybvod)
Russian Federation
Russian Federation
Pavel S. Sukhonos, deputy head
43a, Emelyanov Str., Yuzhno-Sakhalinsk, 693006
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For citations:
Kaev A.M., Makeev S.S., Sukhonos P.S. Some issues of dynamics for the herd of pink salmon Oncorhynchus gorbuscha in the Aniva Bay (Sakhalin Island). Izvestiya TINRO. 2025;205(3):448-471. (In Russ.) https://doi.org/10.26428/1606-9919-2025-205-448-471
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