Acknowledgements
We thank the Fisheries and Oceans Canada’s Schlerochronology Lab at the Pacific Biological Station for providing access to the Rivers Inlet sockeye salmon scale archive, in particular the kind assistance of Darlene Gillespie and Stephen Wischniowski. We thank the Wuikinuxv Nation for ongoing support in sample collection from returning sockeye salmon since 2011, in particular Billie Johnson, Chris McConechy, and David Rolston. We also thank the Columbia River Inter-Tribal Fish Commission for providing access to their archive of sockeye salmon scales; in particular John Whiteaker, Crystal Chulik, and Amber Cate, and all the specialists working at KamchatNIRO who were involved in the sampling and archiving of salmon scales.