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<p>The distribution of Pacific salmon (<i>Oncorhynchus</i> spp.) in the Arctic has been limited and poorly documented. However, recent evidence indicates that salmon are more commonly feeding and spawning at northerly latitudes as the climate warms. Here, we report on post-spawning sockeye salmon, <i>O. nerka</i>, observed in the Clark River on Wrangel Island, Russia (N 71°, W 178°). To our knowledge, this is the first documented occurrence of this species spawning in rivers of the Russian Arctic. The fish were observed on 22 September 2018, approximately 55 river km inland at an elevation of 250&#xa0;m. If a sockeye salmon population were to become established on Wrangel, it would represent a significant range extension for the species. It also could alter ecosystem dynamics by providing an alternative food supply for the exceptionally high density of polar bears, <i>Ursus maritimus</i>, that use the island during the summer and autumn. Our opportunistic observation of sockeye salmon on Wrangel highlights the importance of future investigation into their origin and life history, population status (i.e., whether they are self-recruiting or strays from elsewhere), and potential effects on polar bears and other terrestrial wildlife.</p>

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Wrangel Island provides the first observations of spawning sockeye salmon (Oncorhynchus nerka) in the Russian Arctic

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • E. V. Regehr,
  • N. Prahl,
  • A. R. Gruzdev,
  • P. S. Kulemeev,
  • U. V. Babiy,
  • T. P. Quinn

摘要

The distribution of Pacific salmon (Oncorhynchus spp.) in the Arctic has been limited and poorly documented. However, recent evidence indicates that salmon are more commonly feeding and spawning at northerly latitudes as the climate warms. Here, we report on post-spawning sockeye salmon, O. nerka, observed in the Clark River on Wrangel Island, Russia (N 71°, W 178°). To our knowledge, this is the first documented occurrence of this species spawning in rivers of the Russian Arctic. The fish were observed on 22 September 2018, approximately 55 river km inland at an elevation of 250 m. If a sockeye salmon population were to become established on Wrangel, it would represent a significant range extension for the species. It also could alter ecosystem dynamics by providing an alternative food supply for the exceptionally high density of polar bears, Ursus maritimus, that use the island during the summer and autumn. Our opportunistic observation of sockeye salmon on Wrangel highlights the importance of future investigation into their origin and life history, population status (i.e., whether they are self-recruiting or strays from elsewhere), and potential effects on polar bears and other terrestrial wildlife.