Salish Sea Marine Survival Project Publication #9

Salish Sea Marine Survival Project researchers found that 80% of the steelhead populations they studied in Washington, Oregon, and British Columbia have declined in abundance since the 1980s. Salish Sea steelhead had the most severe declines over this time period. Marine survival trends varied regionally, grouping into Washington/Oregon coast, lower Columbia River, Strait of Juan de Fuca, and Puget Sound populations (plus Keogh River in British Columbia). Marine survival has declined to some degree for all regional groups except the Washington/Oregon coast since the 1970s; Salish Sea steelhead populations experienced a steep decline in survival in the mid-1980s. Read more: Kendall et al. (2017) Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean. DOI: 10.1139/cjfas-2016-0486