Table 1. Regression analyses of long-term (> 10 yr) and short-term (7–10 yr or 3–10 yr for juveniles) trends in adult, subadult/jack, and juvenile salmonid abundance and exact and scale matches of composite habitat matrix index scores (β = regression coefficient, N = number of trends, r2 = coefficient of determination, and P = regression significance level).

 
Exact matches
 
Short-term
 
Long-term
Life stage  
Species
 
 
 
 
 
β
 
N
 
r2
 
P
 
 
 
 
 
β
 
N
 
r2
 
P
Adult  
All
 
 
 
 
 
5.9
 
27
 
0.007
 
0.7
 
 
 
 
 
-8.0
 
27
 
0.05
 
0.3
Subadult/jack  
All
 
 
 
 
 
24.4
 
14
 
0.06
 
0.4
 
 
 
 
 
2.8
 
14
 
0.02
 
0.6
Juvenile  
All
 
 
 
 
 
0.004
 
14
 
0.07
 
0.4
 
 
 
 
 
-0.03
 
6
 
0.28
 
0.3
 
Scale matches
 
Short-term
 
Long-term
Life stage  
Species
 
 
 
 
 
β
 
N
 
r2
 
P
 
 
 
 
 
β
 
N
 
r2
 
P
Adult  
Coho
 
 
 
 
 
-11.5
 
38
 
0.04
 
0.3
 
 
 
 
 
4.3
 
38
 
0.06
 
0.1
   
Chinook
 
 
 
 
 
-39.5
 
21
 
0.26
 
0.02
 
 
 
 
 
-2.5
 
21
 
0.007
 
0.7
Subadult/jack  
Coho
 
 
 
 
 
-23.4
 
35
 
0.12
 
0.04
 
 
 
 
 
8.7
 
35
 
0.25
 
0.002
   
Chinook
 
 
 
 
 
-10.6
 
24
 
0.02
 
0.6
 
 
 
 
 
3.2
 
24
 
0.005
 
0.7
Juvenile  
All
 
 
 
 
 
-0.004
 
16
 
0.19
 
0.1
 
 
 
 
 
0.03
 
10
 
0.19
 
0.2