Appendix B. Two tables of logistic-regression model comparison statistics for adult chinook salmon and steelhead migration success.
TABLE B1. Selection statistics for chinook salmon logistic-regression models where the dependent variable was adult migration success (homed or did not home to Lower Granite Dam). Barge = transport or in-river; Origin = hatchery or wild; Adultyear = year adult fish were radio-tagged at Bonneville Dam; Adultdate = Julian date of adult tagging; Adultsite = release site downstream or in forebay of Bonneville Dam; Juvyear = year juvenile fish were PIT-tagged at Lower Granite Dam; Juvdate = Julian date of juvenile tagging; na = quasi-complete separation of data.
Model |
df |
AIC |
∆AIC |
AIC wi |
Barge + Juvyear |
3 |
293.61 |
0.00 |
0.189 |
Barge + Adultsite |
2 |
294.20 |
0.60 |
0.140 |
Barge + Juvyear + Juvdate |
6 |
294.55 |
0.95 |
0.118 |
Barge + Juvyear + Barge×Juvyear |
5 |
295.24 |
1.63 |
0.084 |
Barge + Origin + Juvyear |
4 |
295.52 |
1.91 |
0.073 |
Barge |
1 |
295.76 |
2.15 |
0.065 |
Barge + Juvdate |
2 |
296.55 |
2.94 |
0.044 |
Barge + Origin |
2 |
296.59 |
2.99 |
0.043 |
Barge + Adultyear |
4 |
296.62 |
3.01 |
0.042 |
Barge + Adultyear + Adultdate |
5 |
297.15 |
3.54 |
0.032 |
Barge + Adultdate |
2 |
297.17 |
3.56 |
0.031 |
Barge + Adultdate + Barge×Adultdate |
3 |
297.20 |
3.59 |
0.031 |
Barge + Origin + Juvyear + Juvdate + Adultyear + Adultdate + Adultsite |
10 |
297.52 |
3.92 |
0.027 |
Barge + Origin + Adultyear |
5 |
298.19 |
4.58 |
0.019 |
Barge + Juvdate + Barge×Juvdate |
3 |
298.51 |
4.90 |
0.016 |
Barge + Origin + Barge×Origin |
3 |
298.57 |
4.97 |
0.016 |
Juvyear |
2 |
298.99 |
5.38 |
0.013 |
Barge + Adultyear + Barge×Adultyear |
7 |
301.31 |
7.71 |
0.004 |
Adultsite |
1 |
301.54 |
7.94 |
0.004 |
Origin |
1 |
301.92 |
8.32 |
0.003 |
Adultyear |
3 |
302.80 |
9.19 |
0.002 |
Origin + Juvyear + Juvdate + Adultyear + Adultdate + Adultsite |
9 |
302.89 |
9.28 |
0.002 |
Adultdate |
1 |
303.99 |
10.38 |
0.001 |
Juvdate |
1 |
304.14 |
10.53 |
0.001 |
Barge + Adultsite + Barge×Adultsite |
na |
na |
na |
na |
TABLE B2. Selection statistics for steelhead logistic-regression models where the dependent variable was adult migration success (homed or did not home to Lower Granite Dam) Barge = transport or in-river; Origin = hatchery or wild; Adultyear = year adult fish were radio-tagged at Bonneville Dam; Adultdate = Julian date of adult tagging; Adultsite = release site downstream or in forebay of Bonneville Dam; Juvyear = year juvenile fish were PIT-tagged at Lower Granite Dam; Juvdate = Julian date of juvenile tagging; na = quasi-complete separation of data.
Model |
df |
AIC |
∆AIC |
AIC wi |
Barge |
1 |
519.49 |
0.00 |
0.149 |
Barge + Adultyear + Barge×Adultyear |
5 |
519.68 |
0.19 |
0.136 |
Barge + Adultyear |
3 |
520.08 |
0.59 |
0.111 |
Barge + Adultdate |
2 |
520.53 |
1.04 |
0.088 |
Barge + Adultsite |
2 |
521.00 |
1.51 |
0.070 |
Barge + Origin |
2 |
521.46 |
1.97 |
0.056 |
Barge + Origin + Adultyear |
4 |
521.48 |
1.99 |
0.055 |
Barge + Juvdate |
2 |
521.48 |
1.99 |
0.055 |
Barge + Adultyear + Adultdate |
4 |
521.55 |
2.06 |
0.053 |
Barge + Juvyear |
3 |
521.92 |
2.43 |
0.044 |
Barge + Adultdate + Barge×Adultdate |
3 |
522.44 |
2.95 |
0.034 |
Barge + Adultsite + Barge×Adultsite |
3 |
522.44 |
2.95 |
0.034 |
Barge + Origin + Juvyear |
4 |
522.66 |
3.17 |
0.031 |
Barge + Origin + Barge×Origin |
3 |
522.93 |
3.44 |
0.027 |
Barge + Juvdate + Barge×Juvdate |
3 |
523.45 |
3.96 |
0.021 |
Barge + Juvyear + Juvdate |
4 |
523.51 |
4.02 |
0.020 |
Barge + Juvyear + Barge×Juvyear |
5 |
524.25 |
4.76 |
0.014 |
Adultyear |
2 |
530.41 |
10.91 |
0.001 |
Adultdate |
1 |
531.19 |
11.70 |
0.000 |
Origin |
1 |
532.11 |
12.62 |
0.000 |
Juvyear |
2 |
532.11 |
12.62 |
0.000 |
Juvdate |
1 |
532.32 |
12.83 |
0.000 |
Adultsite |
1 |
532.34 |
12.85 |
0.000 |
Barge + Origin + Juvyear + Juvdate + Adultyear + Adultdate + Adultsite |
na |
na |
na |
na |
Origin + Juvyear + Juvdate + Adultyear + Adultdate + Adultsite |
na |
na |
na |
na |