(A) Annual releases of juvenile hatchery chum salmon, pink salmon, and sockeye salmon into the North Pacific Ocean and (B) the proportion of total hatchery releases originating from North American hatcheries, 1950–2005. Values exclude spawning-channel sockeye salmon. Values are updated from Mahnken et al. (1998). Ruggerone, et al, 2010

(A) Annual releases of juvenile hatchery chum salmon, pink salmon, and sockeye salmon into the North Pacific Ocean and (B) the proportion of total hatchery releases originating from North American hatcheries, 1950–2005. Values exclude spawning-channel sockeye salmon. Values are updated from Mahnken, et al. (1998). Ruggerone, et al, 2010

Gregory T. Ruggerone, Randall M. Peterman, Brigitte Dorner, and Katherine W. Myers, “Magnitude and Trends in Abundance of Hatchery and Wild Pink Salmon, Chum Salmon, and Sockeye Salmon in the North Pacific Ocean“, Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 2010; 2: 306-328 doi: 10.1577/C09-054.1