SUPPLEMENTARY MATERIAL
Supplementary Figures and Tables
Figure S1. Funnel plots of the standard error of the log odds ratio (SELOR) versus log odds ratio
effect size (ESLOR) for a) local versus foreign fish and b) home versus away fish. The dashed line
represents zero effect. Open circles denote studies that were not peer reviewed (from the
secondary literature); closed circles represent studies that were peer reviewed (from the primary
literature).
Figure S1.
Table S1. Microsoft Excel spreadsheet details of individual salmonid studies used for metaanalysis and quantitative surveys (summarized more simply in Tables 1 and 2).
Table S2. Model comparisons for linear mixed effects models. Model indicates the fixed effects
included in the analysis where terms in bold indicate the best fit models, AIC is Akaike’s
Information Criteria from the model output, 2 values indicate the likelihood ratio of comparison
of increasingly simple models, where terms in bold indicate that there was a significant change in
model fit when comparing to the model above. n is the number of comparisons in each model,
and k is the number of estimated parameters. AICc is the corrected AIC including sample size
and number of parameters, delta is the AIC difference between each model and the best model
according to AICc, and ωAIC is the relative weight of each model given AICc.
Model
AIC
2
n
k
AICc
delta
ωAIC
6
5
4
4
3
293.06
285.17
277.02
281.15
273.11
19.94
12.06
3.91
8.04
0
<0.001
0.002
0.12
0.015
0.86
6
5
4
4
3
279.44
273.14
264.18
278.92
280.56
15.25
8.95
0
14.74
16.38
<0.001
0.01
0.99
<0.001
<0.001
Local-Foreign
distance * peer
distance + peer
distance
peer
intercept
250.32
249.53
248.16
251.86
250.35
0.47
0.821
4.331
5.579, 0.4892
48
48
48
48
48
distance * peer
distance + peer
distance
peer
intercept
235.97
236.72
234.83
247.93
255.62
2.83
0.031
15.961
22.79, 9.692
45
45
45
45
45
Home-Away
1
These models were compared to the additive model including both distance and peer-review
(primary vs. secondary literature). Thus, in the models including only peer review, removing the
distance term had a significant effect on the model fit.
2
Models including intercept only were compared to both simple models including only distance
or only peer review. The first value is the log likelihood for the model including only the
intercept compared to the model including distance, the second value is the comparison between
models including only the intercept to the model including peer review only.