Table 2.

Univariate models showing fixed effect estimates for nestling house wren traits

Trait/Effect	Level	Coefficient ± SE	DF num	DF den	F	P
TARSUS
μ		18.33 ± 0.094	1	177.5	83199	<0.001
Year1	2005	−0.066 ± 0.079	2	233.2	2.41	0.093
	2006	0.0728 ± 0.075
Sex	Male	0.275 ± 0.074	2	637.5	22.83	<0.001
	Female	0.031 ± 0.075
HAEMATOCRIT
μ		42.06 ± 0.98	1	319.5	5003	<0.001
Year1	2005	−1.33 ± 0.87	2	394.3	1.18	0.310
	2006	−1.01 ± 0.87
Sex	Male	0.517 ± 0.636	2	1308	0.59	0.550
	Female	0.311 ± 0.635
PHA
μ		0.785 ± 0.040	1	320.1	491.5	<0.001
Year1	2005	−0.327 ± 0.035	2	386.6	49.95	<0.001
	2006	−0.106 ± 0.032
Sex	Male	−0.047 ± 0.031	2	1340	1.32	0.270
	Female	−0.039 ± 0.031
MASS (“Condition”)
μ		9.81 ± 0.105	1	316.9	17361	<0.001
Year1	2005	−0.309 ± 0.088	2	431.8	8.46	<0.001
	2006	−0.346 ± 0.088
Sex	Male	0.225 + 0.079	2	1505	5.53	0.004
	Female	0.157 + 0.079
Tarsus		0.519 + 0.034	1	2101	235.7	<0.001
Tarsus2		−0.149 + 0.027	1	2100	31.37	<0.001
Tarsus3		−0.027 + 0.004	1	2035	54.2	<0.001

¹Year effects for 2005 and 2006 are shown relative to the predicted mean in 2004.