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Table 5 Description of generalized additive models with covariates, R 2, ΔAIC, and AUC before and after k-fold cross-validation

From: Behavior of satellite-tracked Antarctic minke whales (Balaenoptera bonaerensis) in relation to environmental factors around the western Antarctic Peninsula

Covariates R 2 ΔAIC AUC before AUC after
Whale 1
Jday + lat + SIE + ΔSIE + ΔSST + Δbath 0.546 0 0.9672 0.9527
SIE + ΔSIE 0.232 197 0.8526 0.8302
Whale 2
SIE + ΔSIE + SST + ΔSST + bath + Δbath 0.589 0 0.9690 0.9498
SIE + ΔSIE 0.107 223 0.7647 0.6621
Whale 3
Lat + SIE + ΔSIE + SST + ΔSST + bath + Δbath 0.762 0 0.9984 0.9974
SIE + ΔSIE 0.535 275 0.9523 0.9520
  1. All models predicted the MSSI and used a Gaussian distribution
  2. Jday Julian day, lat latitude, SIE distance to the sea ice extent (km), ΔSIE change in distance to the SIE, SST sea surface temperature (C), ΔSST change in SST, bath bathymetry (km), Δbath change in bathymetry