Aggressive behavioural interactions between swans (Cygnus spp.) and other waterbirds during winter: a webcam-based study

Table 4 Comparison of models of the time spent in aggressive interactions between swans

Species	Model	k	AIC_c	ΔAIC_c	RL	w_i	ER	\(R^{ 2}_{\text{c}}\)	\(R^{ 2}_{\text{m}}\)
Whooper Swans	i + N + (i\|D)	2	295.87	0.00	1.00	0.505	1.00	0.351	0.193
	i + (i\|D)	1	296.31	0.45	0.80	0.404	1.25	0.215	0.000
	i + T + (i\|D)	4	299.29	3.42	0.18	0.091	5.53	0.142	0.129
Bewick’s Swans	i + T * W + (i\|D)	12	802.43	0.00	1.00	0.664	1.00	0.343	0.233
	i + (i\|D)	1	805.67	3.24	0.20	0.131	5.06	0.226	0.000
	i + N + (i\|D)	2	807.16	4.74	0.09	0.062	10.68	0.236	0.007
	i + W + (i\|D)	3	807.74	5.31	0.07	0.047	14.26	0.226	0.000
	i + T + (i\|D)	4	808.37	5.94	0.05	0.034	19.51	0.211	0.017
	i + M + (i\|D)	5	808.80	6.37	0.04	0.027	24.16	0.224	0.030
	i + T + W + (i\|D)	6	810.44	8.01	0.02	0.012	54.83	0.213	0.019
	i + N + M + (i\|D)	6	810.74	8.31	0.02	0.010	63.75	0.231	0.030
	i + T + M + (i\|D)	8	811.00	8.57	0.01	0.009	72.75	0.198	0.070
	i + N * M + (i\|D)	10	813.40	10.97	0.00	0.003	241.39	0.195	0.071
	i + T * M + (i\|D)	20	820.81	18.38	0.00	0.000	9786.90	0.216	0.091

A summary of the relative support for each of our candidate models of the time spent by swans in aggressive interactions with other swans. Model parameters: intercept (i), number of swans present (N), month (M), winter (W), time of day (T), and observation identity (D). k refers to the number of fixed effects in the model

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