Individual quality explains association between plumage colouration, arrival dates and mate acquisition in yellow warblers (Setophaga petechia)

Table 4 Impacts of breeding location, sex, age, tail colour and winter habitat on greater covert colour

Feather	Variable	r²	Model	β	SE	F	Prob > F
GC	Hue	0.55	Intercept	36.6	2.78
			Location _Revelstoke	-12.23	5.54	-	0.03
			Sex _male	1.29	0.11	-	<0.001
			Age _SY	-13.13	4.7	-	0.006
			Tail Hue	0.28	0.05	-	<0.001
			Location*Age	-0.91	0.26	13.15	<0.001
			Age*Tail Hue	0.25	0.09	8.39	0.005
			Location*Tail Hue	0.23	0.1	4.62	0.03
			δ¹³C	-	-	0.77	0.38
			δ¹⁵N	-	-	2.11	0.15
GC	Chroma	0.65	Intercept	22.31	3.32
			Location_Revelstoke	-	-	0.83	0.36
			Sex _male	12	0.99	152.2	<0.001
			Age _SY	-2.65	0.88	8.64	0.004
			Tail Chroma	0.42	0.05	68.73	<0.001
			δ¹³C	-	-	0.06	0.81
			δ ¹⁵ N	0.65	0.24	7.43	0.007

Summary of the effects of breeding location, sex, age, tail colour, δ¹³C and δ¹⁵N on greater covert (GC) hue and chroma. We present the adjusted r² for the final model. Beta values are ± standard error are given for significant terms (in bold). All two way interactions were examined but we present only those that were found to be significant (p < 0.05).

ISSN: 1472-6785