Table 1. Akaike’s Information Criterion for five models in candidate set. Results are shown for (a) maximum distance moved over the duration of the study, and (b) the maximum distance moved per 10-d interval before migration. Akaike weights are scaled between 0 and 1, with higher weights indicating greater support. Parameter estimates are also reported for the model selected as having the best fit. The response variable of distance moved was ln-transformed before analysis. A constant of 1 was added to the distance moved per unit time before transformation because of the presence of zeros. Landscape pattern was a dummy variable coded 0 for large, 1 for small. Feeding treatment was a dummy variable coded 0 for fed, 1 for unfed. Time was a continuous variable ranging from 1 to 11, with each increment representing a 10-d interval relative to hatching date.
| |
| |
| MODEL |
AIC |
AKAIKE WEIGHT |
| |
|
(a) Models predicting maximum distance moved before migration |
|
Feeding Treatment (FT) |
186.5 |
0.004 |
|
Siblings (S) |
183.7 |
0.01 |
|
Landscape Pattern (LP) |
178 |
0.25 |
|
FT*LP |
176.6 |
0.51 |
|
FT*S |
178.2 |
0.23 |
|
Ln (maximum distance) = 6.82+(-1.55*LP)+(-0.90*FT)+(1.40*LP*FT) |
|
|
|
|
|
|
|
|
|
(b) Models predicting maximum distance moved per 10-d time
interval |
|
T * S |
1727.9 |
0.05 |
|
T * LP |
1722.6 |
0.7 |
|
T * FT * LP |
1726.3 |
0.11 |
|
T * FT * S |
1725.9 |
0.13 |
|
Ln (maximum distance) = 0.88+(0.69*LP)+(0.66*T)+(-0.25*LP*T) |
|
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