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Table 4 Summary of generalized additive models to predict core space characteristics

From: Juvenile Steller sea lion (Eumetopias jubatus) utilization distributions in the Gulf of Alaska

Response Variable df AIC ΔAIC weight
(a) Core Area
 Region + s(Season:Region) 8 537.3 0.00 0.50
 Region 5 537.9 0.60 0.49
(b) Core area (w/age)
 Region 5 278.35 0.00 1
(c) Minimum Distance Core-Haulout
 s(Season:Region) + Region + Sex + Region:Sex 11 1671.06 0.00 0.56
 s(Season:Region) + Region 8 1673.63 2.57 0.23
 s(Season) + Region + Sex + Region:Sex 9 1675.86 4.80 0.07
 Region + Sex + Region:Sex 8 1676.43 5.37 0.07
 S(Season:Region) 6 1676.51 5.45 0.06
(d) Minimum Distance Core-Haulout (w/age)
 Season + Region + Season:Region 11 840.54 0.00 0.88
(e) Intensity
 Sex + s(Season:Region) 8 293.80 0.00 0.58
 s(Season:Region) 6 294.60 0.80 0.42
(f) Intensity (w/age)
 Season 5 168.04 0.00 0.92
  1. Models presented are those included in our final model set based on criteria <Δ6 AIC and not a nested version of a simpler model [53]). Variables preceded by an s indicate the factor was included as a smoothed factor with a cyclic cubic regression spline