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Table 1 Comparison of linear models testing the effect of various combinations of weather variables on mating time of a semi-domesticated reindeer population in the Kutuharju field reindeer research station in Kaamanen, northern Finland (69°N, 27°E) from 1996 to 2013

From: Response of reindeer mating time to climatic variability

Variables K AIC ΔAIC AICwt
Mating time
 MinTemp + Prec + Snow 5 1777.05 0.00 0.67
 MaxTemp + MinTemp + Prec + Snow 6 1778.48 1.43 0.33
 MaxTemp + Prec + Snow 5 1786.65 9.59 0.01
 MaxTemp + MinTemp + Snow 5 1788.98 11.93 0.00
 MinTemp + Snow 4 1790.24 13.19 0.00
 MinTemp + Prec 4 1790.48 13.42 0.00
 MaxTemp + MinTemp + Prec 5 1791.48 14.42 0.00
 MaxTemp + Snow 4 1796.92 19.87 0.00
 MaxTemp + MinTemp 4 1797.38 20.32 0.00
 MinTemp 3 1798.73 21.67 0.00
 MaxTemp + Prec 4 1802.59 25.54 0.00
 MaxTemp 3 1807.86 30.81 0.00
 Prec + Snow 4 1813.57 36.51 0.00
 Prec 3 1844.42 67.36 0.00
 Snow 3 1854.79 77.74 0.00
  1. The linear models had weather variables as fixed effects and year as a random effect. A total of 15 models were fitted. The models were compared and ordered by AIC values. K represents the number of weather variables fitted in the model. The ΔAIC (difference with the AIC of the best model) and AIC weights (AICwt, weight of the model relative to all 15 models fitted) were also provided (see text for details). The dates defining the critical time window for each weather variable are given in Results