From: Behavioural response of a migratory songbird to geographic variation in song and morphology
(a) | Â | Â | Â | Â |
---|---|---|---|---|
 | PC 1 | PC 2 | PC 3 |  |
Song duration | 0.40 | 0.33 | 0.46 | Â |
No. of elements | 0.46 | 0.38 | 0.29 | Â |
Element rate | −0.27 | −0.29 | 0.46 |  |
Peak frequency | −0.02 | 0.30 | −0.63 |  |
Min. frequency | −0.23 | 0.61 | −0.04 |  |
Max. frequency | 0.53 | −0.08 | −0.27 |  |
Bandwidth | 0.47 | −0.44 | −0.14 |  |
Eigenvalue | 2.61 | 2.04 | 1.51 | Â |
% variance | 37.26 | 29.17 | 21.62 | Â |
(b) | Â | Â | Â | Â |
Fixed effects | estimate | s.e.m | t | p |
Intercept | −1.76 | 0.12 | −14.89 | <0.001 |
90 km | 2.28 | 0.29 | 7.97 | <0.001 |
180 km | 2.38 | 0.18 | 13.52 | <0.001 |
African | 0.64 | 0.19 | 3.44 | <0.001 |
Control | 4.79 | 0.19 | 25.45 | <0.001 |