Appendix C. Description of parameter values used in sensitivity analyses.
Model parameter
|
Default value
|
Low value
|
High value
|
Smolt-to-adult survival (lower basin, upper basin)
|
1.25%, 2.88%
|
5th percentile = 0.45%, 1.0%
|
95th percentile = 4.0%, 9.3%
|
Winter dispersal (age-0, age-1)
|
50%, 30%
|
Default * 0.5 = 25%, 15%
|
Default * 1.5 = 75%, 45%
|
Cross-ecotype production (AF X RM)
|
61%
|
Default * 0.5 = 30.5%
|
Default * 1.5 = 91.5%
|
Anadromous spawner fidelity
|
76%
|
Default - 25% = 50%
|
Default + 25% = 100%
|
Growth (food availability)
|
qe = 1
|
Default - 16% = 0.84
|
Default + 16% = 1.16
|
Age-at-maturity (ages 1, …, 5)
|
8%, 22%, 47%, 73%, 90%
|
Default - 10% = 0%, …, 80%
|
Default + 10% = 18%, ..., 100%
|
Length threshold for smoltification
|
150 mm
|
Default - 30 = 120mm
|
Default + 30 = 180mm
|
Maximum survival Mar-Oct (ages 1-5)
|
80%
|
40%
|
90%
|
Appendix D. Summary of model results for each of eight different sensitivity scenarios for the Kittitas, Taneum, and Toppenish Mid reaches. Reach names and corresponding estimates of relative reproductive success under default model settings are shown in italics.
|
Relative reproductive success
|
|
Change from default
|
Kittitas
|
Default =
|
0.23
|
|
|
|
Model parameter
|
Low
|
High
|
|
Low - Default
|
High - Default
|
Smolt-to-adult survival
|
0.06
|
1.33
|
|
-0.17
|
1.10
|
Winter dispersal
|
NA
|
NA
|
|
NA
|
NA
|
Cross-ecotype production (AF X RM)
|
0.15
|
0.41
|
|
-0.08
|
0.18
|
Anadromous spawner fidelity
|
0.23
|
0.40
|
|
-0.01
|
0.17
|
Growth (food availability)
|
0.11
|
0.25
|
|
-0.12
|
0.01
|
Age-at-maturity
|
0.45
|
0.15
|
|
0.22
|
-0.08
|
Length threshold for smoltification
|
0.09
|
0.26
|
|
-0.14
|
0.03
|
Maximum survival Mar-Oct
|
0.25
|
0.25
|
|
0.02
|
0.02
|
|
|
|
|
|
|
Taneum
|
Default =
|
0.65
|
|
|
|
Model parameter
|
Low
|
High
|
|
Low - Default
|
High - Default
|
Smolt-to-adult survival
|
0.12
|
3.67
|
|
-0.53
|
3.02
|
Winter dispersal
|
0.70
|
0.35
|
|
0.05
|
-0.30
|
Cross-ecotype production (AF X RM)
|
0.30
|
1.59
|
|
-0.35
|
0.94
|
Anadromous spawner fidelity
|
0.61
|
1.49
|
|
-0.04
|
0.84
|
Growth (food availability)
|
0.29
|
1.73
|
|
-0.36
|
1.08
|
Age-at-maturity
|
1.03
|
0.42
|
|
0.38
|
-0.23
|
Length threshold for smoltification
|
0.67
|
0.41
|
|
0.02
|
-0.24
|
Maximum survival Mar-Oct
|
0.56
|
0.68
|
|
-0.09
|
0.03
|
|
|
|
|
|
|
Toppenish Mid
|
Default =
|
2.04
|
|
|
|
Model parameter
|
Low
|
High
|
|
Low - Default
|
High - Default
|
Smolt-to-adult survival
|
0.38
|
10.17
|
|
-1.66
|
8.13
|
Winter dispersal
|
2.12
|
1.86
|
|
0.08
|
-0.19
|
Cross-ecotype production (AF X RM)
|
0.76
|
7.70
|
|
-1.28
|
5.66
|
Anadromous spawner fidelity
|
1.97
|
6.98
|
|
-0.07
|
4.93
|
Growth (food availability)
|
0.22
|
3.31
|
|
-1.82
|
1.27
|
Age-at-maturity
|
4.08
|
1.20
|
|
2.04
|
-0.84
|
Length threshold for smoltification
|
1.65
|
0.66
|
|
-0.39
|
-1.38
|
Maximum survival Mar-Oct
|
2.51
|
2.01
|
|
0.46
|
-0.03
|
|