| Citation | Sara Gilk-Baumer,Caroline Graham,Kathrine Howard,Eric Rondeau,Mark Saunders,Aidan Schubert,Don Vandoornik,Bernard Yang,Andrew Barclay,Richard Beamish,Jacquelynne King,Laurie Weitkamp,Ed Farley,Cameron Freshwater,James Murphy,Chrys Neville,Evgeny Pakhomov,Vladimir Radchenko,Brian Riddell 2024. Highlights of the 2022 IYS Pan-Pacific Winter Expedition.. |
| Title | Highlights of the 2022 IYS Pan-Pacific Winter Expedition |
| Publication Year | 2024 |
| Keywords | pacific salmon, chinook salmon, pink salmon, steelhead, chum salmon, high seas, coho salmon, sockeye salmon, winter ecology |
| Abstract | During February-April, 2022, an international fleet of five ships from U.S., Canada, and Russia, conducted a coordinated survey of Pacific salmon high seas habitats across 2.5 million km2 of the North Pacific Ocean. The goal was to document salmon use of pelagic habitats during winter to understand factors regulating salmon survival. Across all ships, 2,364 Pacific salmon (Oncorhynchus spp.) and steelhead (O. mykiss) were caught using surface trawls, gill nets, and longlines. Sockeye salmon (O. nerka), was the most abundant salmonid, followed by chum (O. keta), pink (O. gorbuscha), coho (O. kisutch), and Chinook (O. tshawytscha) salmon; steelhead were extremely surface-oriented and only caught with gill nets. Other commonly caught taxa included myctophids, gonatid squids, and jellyfish. Salmon showed species-specific patterns for both distributions and diets. Genetic data indicated that salmon originated from around the Pacific Rim and multiple stocks were typically caught togethe |