Salmon & Steelhead Recovery Tracker

McKenzie River (Independent Population)

McKenzie River Independent Population

Oncorhynchus tshawytscha

Abundance

Annual estimates of the abundance of naturally-produced spawners for each Upper Willamette River population.

Abundance estimates are only currently available for McKenzie River Spring Chinook.

Spawning Year Wild Adult Count Nat. Origin Spawners 95% Confidence Interval Abundance Goal Average Abundance
2005 2,547
2004 4,784
2003 5,788
2002 4,220
2001 3,365
2000 1,897
1999 1,341
1998 1,404
1997 932
1996 1,088
1995 915
1994 814
1993 2,520
1992 1,983
1991 2,028
1990 5,395
1989 2,273
1988 5,152
1987 2,094
1986 750
1985 512
1984 584
1983 1,024
1982 737
1981 635
1980 1,323
1979 702
1978 1,000
1977 1,680
1976 737
1975 1,300
1974 3,657
1973 3,214
1972 1,264
1971 3,082
1970 2,848

Average Abundance

Spawning Year Average Abundance Avg. of Ab.Goal

Hatchery Proportion

The proportion of spawning fish that are of hatchery origin in each Upper Willamette River population.

Hatchery proportions are only currently available for McKenzie River Spring Chinook.

Spawning Year Whole Basin Proportion Hatchery Below Dam Proportion Hatchery
2005 0.17
2004 0.47
2003 0.45
2002 0.38
2001 0.24
2000 0.25
1999 0.28
1998 0.24
1997 0.16
1996 0.24
1995 0.42
1994 0.46
1993 0.29
1992 0.46
1991 0.53
1990 0.23
1989 0.41
1988 0.22
1987 0.29
1986 0.57
1985 0.37
1984 0.37
1983 0.27
1982 0.57
1981 0.42
1980 0.33
1979 0.37
1978 0.67
1977 0.37
1976 0.60
1975 0.00
1974 0.00
1973 0.14
1972 0.14
1971 0.11
1970 0.00

Average Hatchery Proportion

Spawning Year Whole Basin Proportion Hatchery 9-yr. pHOS Avg. WB Whole Basin pHOS Limit Below Dam Proportion Hatchery 9-yr. pHOS Avg. BD Below Dam pHOS Limit