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Table 2 Summary of generalized additive models to predict home range characteristics

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

Response Variable df AIC ΔAIC weight
(a) Home Range Area
 Region + Sex 6 500.16 0.00 0.50
 Region 5 500.33 0.17 0.49
(b) Home Range Area (w/age)
 Season + Region + Sex 8 252.959 0.00 0.61
 Season + Region 7 255.269 2.31 0.24
 Region + Sex 6 257.272 4.313 0.11
(c) Number of Haulouts in home range
 Region + s(Season:Sex) + Sex 7 434.99 0.00 0.42
 Region + s(Season) + Sex 6 436.38 1.39 0.23
 Region + s(Season:Sex) 6 437.02 2.03 0.17
 Region + Sex 5 438.52 3.53 0.09
 Region + s(Season) 5 438.82 3.83 0.07
(d) Number of Haulouts in home range (w/age)
 Season + Region + Sex 7 195.05 0 0.35
 Season + Region + Age + Season:Age 9 195.10 0.05 0.22
 Region + Sex 5 196.66 1.61 0.22
 Season + Region 6 197.32 2.27 0.14
 Region 4 199.16 4.11 0.07
  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