AIC results for linear mixed-effects models where mean logit-transformed path straightness is a function of ecoregion, sea surface temperature (SST), logarithm of surface chlorophyll a concentration (chla), logarithm of SST gradient (SSTg), logarithm of surface chla gradient (chlag), and logarithm

1p: number of parameters in the model.
2ΔAIC: difference in AIC value between best fitting model and other model.
3ω: Akaike weight.
aSlopes held constant in regions of interest.
bSlopes and intercepts allowed to vary in regions of interest.
*Best fitting model.