Appendix A. Results of GLM analyses.
Factor
SS
df
MS
F
P
A) Combined Brood Years Model
136.22
9
15.14
5.66
<0.001
Date
57.33
1
57.38
21.46
<0.001
Fork length
1.67
1
1.67
0.63
0.430
Year
0.37
1
0.37
0.14
0.711
Sex
0.70
1
0.67
0.25
0.617
Origin
4.91
1
4.91
1.83
0.176
Year × Sex
2.15
1
2.15
0.8
0.371
Year × Origin
0.98
1
0.98
0.37
0.545
Origin × Sex
4.77
1
4.77
1.78
0.182
Year × Sex × Origin
1.40
1
1.38
0.52
0.473
Error
1034.78
387
2.67
Total
1570
397
B) Brood Year 1996
Model
11.13
5
2.23
1.16
0.333
Date
0.08
1
0.08
0.39
0.843
Fork length
0.84
1
0.84
0.44
0.510
Sex
0.16
1
0.16
0.82
0.775
Origin
2.80
1
2.80
1.46
0.229
Origin × Sex
0.00
1
0.00
1.78
0.182
Error
189.63
99
1.92
Total
316
105
C) Brood Year 1997
Model
45.51
5
9.10
4.73
<0.001
Date
23.23
1
23.23
12.09
0.012
Fork length
4.33
1
4.33
2.25
0.135
Sex
2.05
1
2.05
1.06
0.55
Origin
<0.00
1
<0.00
0.01
0.925
Origin × Sex
3.22
1
3.22
1.67
0.197
Error
401.8
209
1.92
Total
598
215
Notes: The dependent variable was the number of smolts produced per individual. Fixed factors were year, sex and origin (hatchery or wild). Covariates were parent body size (fork length) and reproductive timing (date individual passed the wier). SS = sum of squares, df = degrees of freedom, MS = mean square, F = F statistic, and P = significance value. Alpha = 0.05. Analysis was performed for (A) combined brood years, (B) brood year 1996, and (C) brood year 1997.