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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