Table 3. AIC table presenting comparative models for calving date of a semi-domesticated reindeer population in Kaamanen, North Finland, including different weather variables over different periods of the year.
Models | Fixed covariates | Calving date | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Rank | ♀ BCI | Proportion of males | Mean T° | Precipitation | Snow depth index | AICc | df | AICc weights | ΔAICc | R2 | |
April-May | May | April | April | ||||||||
1 | × | × | × | × | 13894.9 | 8 | 0.42 | 0.0 | 0.44 | ||
2 | × | × | × | × | 13895.3 | 8 | 0.36 | 0.4 | 0.45 | ||
3 | × | × | × | × | 13896.2 | 8 | 0.22 | 1.3 | 0.44 |
All linear mixed-effects models for calving date included female’s body condition index and proportion of males as fixed effects and female identity and year as random factors. The models presented in the table are the three competing models retained in explaining calving, i.e. with ΔAICc < 2 (see text for details).