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Table 4 Comparisons of linear model performances of the migration variables with and without size as a covariate in terms of difference in AIC values (ΔAIC)

From: Time versus energy minimization migration strategy varies with body size and season in long-distance migratory shorebirds

  Explanatory variables ΔAIC
(i) Migration speed
Traditional ~ 1 8.5
~ 1+ size 0
Partial ~ 1 21.3
~ 1+ size 0
 (ii) Number of staging sites ~ 1 1.0
~ 1+ size 0
 (iii) Total migration distance ~ 1 10.6
~ size 0
 (iv) Maximum step length ~ 1 14.7
~ 1+ size 0
  1. In all cases a ΔAIC of 0 defines the best model. ΔAIC of alternative models that are >2 suggest that these alternative models are performing worse than the model with a ΔAIC equalling 0