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Table 2 Ranking of the best candidate models to explain occurrence of flying squirrel summer litters in Vaasa and Luoto study areas between 1992 and 2014

From: Siberian flying squirrels do not anticipate future resource abundance

Modela

AICc

ΔAICc

AICc weight

Alder_previous + Rdecjan

117.3

0

0.26

Alder_previous + Rdecjan + birch_previous

117.5

0.8

0.20

Alder_previous + Rdecjan + Tfebmar

119.3

2.0

0.09

Alder_previous + Rdecjan + aspen_previous

119.4

2.1

0.09

Alder_previous + Rdecjan + DdaysApril

119.5

2.2

0.09

Alder_previous + Rdecjan + DdaysMay

119.8

2.5

0.07

Alder_previous + Rdecjan + TJune

119.9

2.6

0.07

Alder_current + Rdecjan

143.5

26.2

0

  1. The best model for both the future and the past food availability are shown. The AICc value, as well as the change in AICc (ΔAICc) and relative weight of support (AIC weight) are shown for each model. Models with cumulative Wi = 0.90 presented
  2. aVariable names: T temperature in given month; R rain in given month; decjan December–January; febmar February–March; Ddays degree days; Aspen Aspen pollen estimate; Alder alder pollen estimate; Birch birch catkin estimate; previous pollen/catkin estimate available preceding gestation; current current years’ pollen/catkin estimate available after lactation and weaning. Study area was included in all models, and it had a significant effect (coefficient and c.l. > 0), since the proportion of summer litters was low in Luoto likely due to a lower density of nest-boxes in Luoto than in Vaasa