Salmon & Steelhead Recovery Tracker

Hood River (Independent Population)

Oncorhynchus mykiss

Abundance

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

Spawning Year Nat. Origin Spawners 95% Confidence Interval Abundance Goal
2016 174
2015 143
2014 73
2013
2012
2011
2010 41
2009 280
2008 120
2007 169
2006 170
2005 152
2004 182
2003 543
2002 414
2001 180
2000 147
1999 98
1998 65
1997 179
1996 131
1995 217
1994 243
1993 489
1992 477

Analysis

A population with a non-negative growth rate and an average abundance approximately equivalent to estimated historical average abundance should be considered to be in the highest persistence category. The estimate of historical abundance should be credible, the estimate of current abundance should be averaged over several generations, and the growth rate should be estimated with an adequate level of statistical confidence.

Evaluation Thresholds

Delisting

Pass - The observed spawner abundance is greater than or equal to the abundance modeled for delisting at least six times in any 12-year period and the average observed spawner abundance is greater than or equal to the average modeled abundance for delisting over that same time period.

Fail - The observed spawner abundance is greater than or equal to the abundance modeled for delisting less than six times in any 12-year period or the average observed spawner abundance is less than the average modeled abundance for delisting over that same time period.

Broadsense

Pass - The observed spawner abundance is greater than or equal to the abundance modeled for delisting at least six times in any 12-year period and the average observed spawner abundance is greater than or equal to the average modeled abundance for broad sense recovery over that same time period.

Fail - The observed spawner abundance is greater than or equal to the abundance modeled for delisting less than six times in any 12-year period or the average observed spawner abundance is less than the average modeled abundance for broad sense recovery over that same time period.

Average Abundance

Twelve years of data are necessary to evaluate this metric. Data will become available after a suitable number of years of monitoring have occurred.

Spawning Year Abundance Goal Average Abundance Avg. of Ab.Goal
2010 208
2009 208
2008 202
2007 203
2006 207
2005 213
2004 241
2003 265
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992

Evaluation Thresholds

Twelve years of data are necessary to evaluate this metric. Data will become available after a suitable number of years of monitoring have occurred

Delisting

Pass - The observed spawner abundance is greater than or equal to the abundance modeled for delisting at least six times in any 12-year period and the average observed spawner abundance is greater than or equal to the average modeled abundance for delisting over that same time period.

Fail - The observed spawner abundance is greater than or equal to the abundance modeled for delisting less than six times in any 12-year period or the average observed spawner abundance is less than the average modeled abundance for delisting over that same time period.

Broadsense

Pass - The observed spawner abundance is greater than or equal to the abundance modeled for delisting at least six times in any 12-year period and the average observed spawner abundance is greater than or equal to the average modeled abundance for broad sense recovery over that same time period.

Fail - The observed spawner abundance is greater than or equal to the abundance modeled for delisting less than six times in any 12-year period or the average observed spawner abundance is less than the average modeled abundance for broad sense recovery over that same time period.

Hatchery Proportion

The proportion of spawning fish that are of hatchery origin in each Lower Columbia River population.

Spawning Year Proportion Hatchery
2016 0.00
2015 0.00
2014 0.20
2013
2012
2011
2010 0.55
2009 0.71
2008 0.52
2007 0.51
2006 0.44
2005 0.53
2004 0.53
2003 0.48
2002 0.23
2001 0.01
2000 0.01
1999 0.04
1998 0.87
1997 0.88
1996 0.80
1995 0.88
1994 0.82
1993 0.78
1992 0.79

Average Hatchery Proportion

Nine years of data are necessary to evaluate this metric. Data will become available once a suitable number of years of monitoring have occurred

Spawning Year 9-yr. pHOS Avg. pHOS Limit
2010 0.50 0.00
2009 0.44
2008 0.36
2007 0.31
2006 0.35
2005 0.40
2004 0.43
2003 0.47
2002 0.50
2001 0.56
2000 0.65
1999
1998
1997
1996
1995
1994
1993
1992

Evaluation Thresholds

Nine years of data are necessary to evaluate this metric. Data will become available once a suitable number of years of monitoring have occurred

Delisting

Pass – Over a nine-year period, the average percentage of the total number of natural spawners that are of hatchery origin is on average less than or equal to the population specific hatchery stray rate target.

Fail – Over a nine-year period, the average percentage of the total number of natural spawners that are of hatchery origin is on average greater than the population specific hatchery stray rate target.

Broadsense

Pass – Over a nine-year period, the average percentage of the total number of natural spawners that are of hatchery origin is on average less than or equal to 10 percent.

Fail – Over a nine-year period, the average percentage of the total number of natural spawners that are of hatchery origin is on average greater than 10 percent.