Table 3.
Equations and variation explained (R 2) by regressing model predicted values vs. observed values
| Model description | Linear regression summary | Akaike weights |
|---|---|---|
| Best model | ||
| Age class, sex, age class*sex, pup presence, glucocorticoid concentration, body condition, previous playbacks heard |
|
0.739 |
| R² = 0.318 | ||
| MODEL excluding age class and age class*sex |
|
0.030 |
| R² = 0.252 | ||
| MODEL excluding sex and age class*sex |
|
0.017 |
| R² = 0.247 | ||
| MODEL excluding pup presence |
|
0.000 |
| R² = 0.202 | ||
| MODEL excluding glucocorticoid concentration |
|
0.032 |
| R² = 0.269 | ||
| MODEL excluding body condition |
|
0.110 |
| R² = 0.307 | ||
| MODEL excluding previous playbacks heard |
|
0.072 |
| R² = 0.299 | ||
Each fixed effect (along with related interactions) was systematically excluded from the best model and only one effect was removed at a time. Akaike weights are provided for each model