Associations between changing climate and body condition over decades in two southern hemisphere passerine birds

Table 3 Changes in seasonal (autumn and winter, spring and summer) and annual body condition over time for (a, b, c) red-winged fairy-wrens and (d, e, f) white-browed scrubwrens captured between 1977 and 2016

Model	Intercept	Julian day	Age	Year	Sex (male)	Year x Sex	df	logLik	AICc	delta	weight
Red-winged fairy-wren
(a) Winter
1	−0.524 ± 0.030	−0.041 ± 0.016	−0.059 ± 0.017	NA	0.448 ± 0.040	NA	7	− 790.107	1594.320	0.000	0.399
2	−0.527	−0.038	− 0.065	0.053	+	+	9	− 788.455	1595.083	0.763	0.273
3	−0.526	− 0.038	− 0.064	0.015	+	NA	8	− 789.771	1595.679	1.359	0.202
(b) Summer
1	−0.130 ± 0.027	− 0.092 ± 0.017	NA	0.111 ± 0.027	0.472 ± 0.037	0.068 ± 0.037	8	− 1106.498	2229.114	0.000	0.480
2	− 0.133	− 0.090	NA	0.146	+	NA	7	− 1108.158	2230.408	1.294	0.251
(c) Annual
1	−0.234 ± 0.021	0.032 ± 0.011	−0.027 ± 0.012	0.186 ± 0.014	0.431 ± 0.028	NA	8	− 2533.392	5082.835	0.000	0.524
2	−0.233	0.032	−0.027	0.176	+	+	9	−2533.170	5084.405	1.570	0.239
White-browed scrubwren
(d) Winter
1	−0.275 ± 0.039	NA	−0.095 ± 0.020	−0.008 ± 0.044	0.448 ± 0.050	0.079 ± 0.044	8	− 803.530	1623.214	0.000	0.403
2	−0.280	NA	−0.095	0.042	+	NA	7	− 805.171	1624.462	1.248	0.216
3	−0.275	0.011	−0.096	− 0.005	+	+	9	−803.361	1624.915	1.700	0.172
(e) Summer
1	−0.218 ± 0.052	NA	−0.092 ± 0.029	−0.056 ± 0.032	0.405 ± 0.067	NA	7	− 611.363	1236.910	0.000	0.283
2	−0.218	−0.035	− 0.096	−0.064	+	NA	8	− 610.447	1237.131	0.221	0.253
3	−0.231	NA	−0.098	NA	+	NA	6	− 612.942	1238.022	1.112	0.162
(f) Annual
1	−0.233 ± 0.035	NA	−0.097 ± 0.016	NA	0.423 ± 0.045	NA	6	− 1418.594	2849.242	0.000	0.328
2	−0.233	−0.019	− 0.096	NA	+	NA	7	− 1417.702	2849.476	0.234	0.292
3	−0.232	NA	−0.096	− 0.004	+	NA	7	−1418.573	2851.218	1.976	0.122

Shown are standardized coefficients and their standard errors (s.e.) for variables included in the top models with ∆AICc less than 2, following model selection based on AICc. All variables were standardized and terms identified as important in the best model have 95% CIs of estimated coefficients that do not overlap zero and important year terms are shown in bold. Models were ranked by ∆AICc values. NA represents variables that were not included in the model

ISSN: 2053-7565