Repeatability of signalling traits in the avian dawn chorus

Table 1 Individual repeatability estimates for start time of dawn song (seconds before sunrise) and dawn song repertoire size

Dawn song trait		R	95% CI	84% CI	V_ind	V_resid	N_ind*	N_rec**	P_perm
Start time	all birds	0.41	0.22–0.57	0.27–0.53	0.17	0.18	25	152	0.001
	before egg laying	0.67	0.38–0.83	0.48–0.79	0.24	0.11	18	57	0.001
	during egg laying	0.31	0.10–0.53	0.14–0.47	0.14	0.22	22	91	0.001
	slow explorer	0.36	0.06–0.61	0.13–0.54	0.11	0.15	10	65	0.001
	fast explorer	0.59	0.18–0.81	0.29–0.75	0.25	0.14	8	46	0.001
Repertoire size	all birds	0.21	0.004–0.33	0.05–0.30	0.08	0.31	25	150	0.001
	before egg laying	0.12	0.00–0.32	0.00–0.24	0.04	0.27	17	55	0.17
	during egg laying	0.20	0.00–0.37	0.00–0.30	0.08	0.33	22	90	0.03
	slow explorer	0.06	0.00–0.22	0.00–0.14	0.02	0.31	10	63	0.15
	fast explorer	0.03	0.00–0.19	0.00–0.12	0.01	0.23	8	46	0.23

*Number of individuals, only including individuals with at least two recordings for the given condition **Total number of recordings
Among and within group variance estimates are reported as V_ind and V_resid respectively. P-values are based on 1000 permutations. Non-overlapping 84% confidence intervals indicate significant differences between group repeatability estimates. Significant values are highlighted in bold

ISSN: 1742-9994