Table 3 Selection results of 10 linear models using small-sample Akaike information criterion (AICc; Burnham and Anderson, 2002) to explain variation in area of annual and seasonal 50% utilization distributions (km2) of brown bears, Afognak and Sitkalidak islands, Alaska, USA, June–November 2017–2020. Refer to Table 1 for model parameter definitions.
From: Variable intraspecific space use supports optimality in an apex predator
Season | Island | Hypothesis | Model | AICc | W |
|---|---|---|---|---|---|
Annual | Afognak | RDH | Timber stand ages + berry habitat + edge density + age + reproductive status + year | − 10.31 | 0.54 |
RDH | Timber stand ages + berry habitat + mean of patch area + age + reproductive status + year | − 9.12 | 0.29 | ||
Sitkalidak | TRVH | Distance to salmon stream + distance to coast + reproductive status + age + year | − 55.00 | 0.85 | |
Spring | Afognak | Sex and age | Age + reproductive status | − 37.76 | 0.32 |
Sitkalidak | TRVH | Distance to salmon stream + distance to coast + age + reproductive status + year | − 37.14 | 0.99 | |
Summer | Afognak | RDH | Timber stand ages + berry habitat + edge density + age + reproductive status + year | − 19.52 | 0.37 |
Timber stand ages + berry habitat + edge density + total patch area + age + reproductive status + year | − 18.32 | 0.20 | |||
Sitkalidak | RDH | Shannon’s diversity + age + reproductive status + year | − 24.09 | 0.63 | |
Fall | Afognak | TRVH | Probability of elk + reproductive status + age + year | − 16.84 | 0.81 |
Sitkalidak | RDH | Berry habitat + total patch area + mean of patch area + age + reproductive status + year | − 9.04 | 0.37 | |
Berry habitat + edge density + total patch area + age + reproductive status + year | − 9.71 | 0.52 |
