Table 5. Competing linear models of calving synchrony of a semi-domesticated reindeer population in Kaamanen, North Finland, in relation to local weather variables over different periods of the year.

	Fixed covariates								Calving synchrony
Rank	♀ BCI	Proportion of males	Mean T°	Number of days when mean T°		Precipitation	Snow depth index		AICc	df	AICc weights	ΔAICc	R2
			Jan	> 0°C in Oct-Nov	< -10°C in Dec	June	Oct-Nov	Nov
1	(×)	×	(×)				×		276.2	7	0.34	0.0	0.23
2	(×)	×	(×)					×	277.2	7	0.21	1.0	0.22
3	×	×		×	×				277.8	6	0.16	1.6	0.17
4	×	×		×		×			278.0	6	0.14	1.8	0.17
5	(×)	×	(×)			×			278.0	7	0.14	1.8	0.20

All linear models for calving synchrony included female’s body condition index and proportion of males as fixed effects. The climatic conditions in June and in the period from October to December were from the calendar year preceding the calving season whereas the climatic conditions for the month of January were from the same calendar year as the calving season. Variables with the checkmark in brackets mean that the interaction term between both was included in the model. The five models of the table were retained as our best models in explaining calving synchrony, i.e. with ΔAICc < 2 (see text for details).