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. 2018 Oct 11;8:15155. doi: 10.1038/s41598-018-33564-y

Table 2.

Results of GLMM on seasonal effects and individual attributes affecting monthly resource preference (ratio time spent at the feeding station:farms, arctangent transformed), home range size (logKDE95) and flight activity (time spent flying, square-root transformed) of 45 Egyptian vultures tracked with GPS-loggers on Fuerteventura (Spain).

Fixed effects a) Resource preference a) Home range size c) Activity
β (SE) FNUMdf, DENdf P β (SE) FNUMdf, DENdf P β (SE) FNUMdf, DENdf P
Intercept 0.52 (0.23) 0.0308 0.73 (0.25) 0.0053 1.31 (0.23) <0.0001
Sex −0.28 (0.33) 2.651,58.2 0.11 0.25 (0.36) 0.951,55.7 0.33 0.96 (0.33) 4.941,51.9 0.0306
Age −0.27 (0.09) 9.331,32 0.0045 0.05 (0.10) 0.271,32.8 0.61 0.10 (0.09) 1.171,31.5 0.29
Territorial status −0.80(0.33) 0.021,51.4 0.88 2.21 (0.35) 46.671,49.6  <0.0001 −0.06 (0.33) 0.401,46.4 0.53
Dominance rank −0.68 (0.31) 0.191, 52.8 0.67 −0.03 (0.33) 0.041,50.8 0.84 0.47 (0.33) 4.221,47.5 0.0456
Month 0.08 (0.03) 6.291, 393 0.0125 −0.12 (0.03) 12.671,392 0.0004 0.12 (0.03) 14.801, 391 0.0001
Sex*dominance rank 1.53 (0.37) 17.481, 53.9 0.0001 0.01 (0.34) 0.001, 51.8 0.95 −0.15 (0.37) 0.171, 48.4 0.68
Sex*territorial status 15.551, 53.9 0.0002 7.081, 51.7 0.0103 0.841, 48.4 0.36
Month² 0.17 (0.11) 15.341, 389 0.0001 0.23 (0.11) 1.691, 389 0.19 −1.02 (0.10) 126.71, 388 <0.0001
Month²* sex*dominance rank 6.802, 387 0.0012 4.152, 387 0.0165 4.282, 386 0.0145
Month²* sex*territorial status 8.383, 387 <0.0001 25.143, 387 <0.0001 3.193, 386 0.0236
Random effects σ² (SE) Z P σ² (SE) Z P σ² (SE) Z P
Individual 0.18 (0.06) 3.20 0.0007 0.22 (0.07) 3.35 0.0004 0.21 (0.06) 3.33 0.0004
Residual 0.46 (0.03) 13.81 <0.0001 0.47 (0.03) 13.82 <0.0001 0.40 (0.03) 13.79 <0.0001
Adjusted repeatability R χ² P R χ² P R χ² P
0.28 64.7 <0.0001 0.32 82.3 <0.0001 0.34 85.8 <0.0001
Null-model σ² (SE) Z P σ² (SE) Z P σ² (SE) Z P
Individual 0.47 (0.11) 4.23 <0.0001 0.43 (0.10) 4.18 <0.0001 0.18 (0.06) 3.20 0.0007
Residual 0.53 (0.04) 14.86 <0.0001 0.56 (0.04) 14.87 <0.0001 0.83 (0.06) 14.85 <0.0001
Non-adjusted repeatability R χ² P R χ² P R χ² P
0.47 209.1 <0.0001 0.43 184.8 <0.0001 0.18 39.8 <0.0001

All transformed response variables were scaled and centred. Repeatability (R) was calculated as the among-individual variance divided by the sum of the among-individual and the residual (within-individual) variance, and its significance tested by comparing models with and without the random effect of bird ID using a likelihood ratio test.