Supplementary material from "Salmon hatchery strays can demographically boost wild populations at the cost of diversity: quantitative genetic modeling of Alaska pink salmon" ...

• Main Authors: May, Samuel, Shedd, Kyle, Gruenthal, Kristen, Hard, Jeffrey, Templin, William, Waters, Charles, Adkison, Milo, Ward, Eric J., Habicht, Christopher, Wilson, Lorna, Wertheimer, Alex, Westley, Peter
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: The Royal Society 2024
• Subjects: Evolutionary biology not elsewhere classified; Pink salmon; Alaska
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.7303149.v1; https://rs.figshare.com/collections/Supplementary_material_from_Salmon_hatchery_strays_can_demographically_boost_wild_populations_at_the_cost_of_diversity_quantitative_genetic_modeling_of_Alaska_pink_salmon_/7303149/1

Hatcheries are vital to many salmon fisheries, with inherent risks and rewards. While hatcheries can increase returns of adult fish, the demographic and evolutionary consequences for natural populations interacting with hatchery fish on spawning grounds remain unclear. This study examined the impacts of stray hatchery-origin pink salmon on natural population productivity and resilience. We explored temporal assortative mating dynamics using a quantitative genetic model that assumed the only difference between hatchery and natural-origin adults was their return timing to natural spawning grounds. This model was parameterized with empirical data from an intensive multi-generational study of hatchery-wild interactions in the world’s largest pink salmon fisheries enhancement program located in Prince William Sound, Alaska. Across scenarios of increasing hatchery fish presence on spawning grounds, our findings underscore a tradeoff between demographic enhancement and preservation of natural population diversity. ...