Table 1.
Generalized linear-mixed model of the probability of reproductive success based on 417 observations of 157 female Svalbard reindeer aged 7 years and over. (Parameter values are given for the final model, excluding non-significant terms except age at last observation. Interactions are denoted by ×. We reported standardized regression coefficients for the final model by first centring and then dividing all continuous variables by 2 s.d [57].)
| analysis of deviance | χ2 | d.f. | p-value |
|---|---|---|---|
| ROSutero × age2 | 1.14 | 1 | 0.29 |
| age2 | 0.13 | 1 | 0.72 |
| ROSutero × age | 0.30 | 1 | 0.58 |
| ROSutero | 5.05 | 1 | 0.02 |
| log (ROScurrent + 1) | 4.50 | 1 | 0.03 |
| age | 3.95 | 1 | 0.04 |
| final model | estimate | s.e. | p-value |
| intercepta | −0.312 | 0.330 | 0.34 |
| age at last observation | −0.183 | 0.305 | 0.54 |
| log (ROScurrent + 1) | −1.255 | 0.533 | 0.02 |
| age | −0.608 | 0.308 | 0.04 |
| ROSutero | 0.612 | 0.275 | 0.02 |
aFemales born under high ROSutero were considered as the reference.