Table 1.

Descriptive analysis of U genogroup events occurring in Washington, Oregon, and Idaho between 1971 and 2013.

All U Events (n = 619)UC Events (n = 475)UP Events (n = 144)
Geography
Coastal watersheds (37 sites)131 (21.2%)15 (3.2%)116 (80.6%)
Columbia River Basin (77 sites)488 (78.8%)460 (96.8%)28 (19.4%)
Host
Sockeye Salmon92 (14.9%)9 (1.9%)83 (57.6%)
Kokanee Salmon131 (5.0%)22 (4.6%)9 (6.3%)
Chinook Salmon295 (47.7%)282 (59.4%)13 (9.0%)
Steelhead Trout153 (24.7%)141 (29.7%)12 (8.3%)
Rainbow Trout210 (1.6%)6 (1.3%)4 (2.8%)
Coho Salmon20 (3.2%)12 (2.5%)8 (5.6%)
Chum Salmon14 (2.3%)3 (0.6%)11 (7.6%)
Atlantic Salmon4 (0.6%)N/A4 (2.8%)
Lifestage
Juveniles119 (19.2%)86 (18.1%)33 (22.9%)
Adults491 (79.3%)386 (81.3%)105 (72.9%)
Unknown Age9 (1.5%)3 (0.6%)6 (4.2%)
  • 1 Kokanee salmon are a freshwater form of sockeye salmon, O. nerka.

  • 2 Rainbow trout are a freshwater form of steelhead trout, O. mykiss.