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Journal of Ichthyology

, Volume 59, Issue 5, pp 743–753 | Cite as

Some Results from Studies on Number Dynamics of Pink Oncorhynchus gorbuscha and Chum O. keta Salmons on the Northwest Coast of Sakhalin Island

  • A. M. KaevEmail author
Article
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Abstract—

The data characterizing the number of separate generations of pink salmon Oncorhynchus gorbuscha and chum salmon O. keta on the northwest coast of Sakhalin Island (harvest volumes, entries of spawners into rivers and the subsequent downstream migration of the juvenile fish) are analyzed. According to the dynamics of harvests and biological indicators of fish, it has been shown that fishing is based on the approaches to the shore of different groups of these fish species. If the presence of groupings for chum salmon is associated with the migration of fish of different races (summer and autumn) and of different origin (from the Amur River and small rivers of the northwestern coast of Sakhalin and the adjacent mainland coast), then it is mainly due to the approach of fish of local origin but of different temporal forms for pink salmon.

Keywords:

pink salmon Oncorhynchus gorbuscha chum salmon O. keta dynamics of harvests number of spawners downstream migration of juvenile fish northwestern coast of Sakhalin 

Notes

FUNDING

The results were obtained during the fulfillment of the state task of the Russian Ministry of Education and Science, no. 6.9561.2017/8.9.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Sakhalin Scientific-Research Institute of Fisheries and Oceanography (SakhNIRO)Yuzhno-SakhalinskRussia
  2. 2.Sakhalin State University (SakhSU)Yuzhno-SakhalinskRussia

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