Table 1.

Model summary examining the effect of territory quality on (a) ROM levels and (b) OXY in the Seychelles warbler. Summaries derived from a normal response hierarchical mixed-modelling procedure. Terms left in the final model are shown in bold. Variances (with standard errors) are given for all random effects

	Estimate ± SE	χ2	d.f.	P
(a) ROMs
Intercept	2.38 ± 0.15
Territory quality (log)	−0.18 ± 0.07	6.74	1	0.009
Season1		107.15	3	<0.001
2007 NW season	−0.54 ± 0.08
2008 SE season	−0.64 ± 0.07
2008 NW season	−0.55 ± 0.08
Time of day	−0.001 ± 0.001	3.47	1	0.06
Time of day (squared)	<0.001 ± <0.001	7.06	1	0.008
Breeding stage2		9.52	3	0.023
Nest-building	0.10 ± 0.07
Incubating	−0.11 ± 0.08
Provisioning	−0.13 ± 0.07
Size-corrected body mass	−0.06 ± 0.05	1.38	1	0.24
Sex3	−0.06 ± 0.05	1.55	1	0.21
Status		0.37	2	0.83
Group size	0.02 ± 0.02	0.69	1	0.41
Age	<0.001 ± 0.01	0.00	1	0.99
Age (squared)	0.001 ± 0.002	0.19	1	0.66
Log territory quality (squared)	3.39 ± 3.51	0.94	1	0.33
Random effects
σterritory2	0.00 ± 0.00	–	–	–
σindividual2	0.00 ± 0.00	–	–	–
σresidual2	0.18 ± 0.01	–	–	–
(b) OXY
Intercept	138.51 ± 3.55
Territory quality (log)	−2.80 ± 3.54	0.62	1	0.43
Season1		47.19	3	<0.001
2007 NW season	0.20 ± 3.40
2008 SE season	−17.66 ± 3.16
2008 NW season	−14.91 ± 3.41
Time of day	0.02 ± 0.01	5.24	1	0.022
Sex3	6.57 ± 2.88	5.23	1	0.022
Status4		5.26	2	0.07
Helper	19.83 ± 8.79
Non-helper	−0.62 ± 4.04
Size-corrected body mass	−0.10 ± 2.30	0.00	1	0.96
Sex3 × Status4		7.77	2	0.021
Sex3 × helper	−16.43 ± 10.40
Sex3 × non-helper	−14.36 ± 5.74
Breeding stage		0.78	3	0.85
Group size	0.82 ± 1.29	0.40	1	0.53
Age	0.21 ± 0.44	0.22	1	0.64
Age (squared)	0.07 ± 0.12	0.35	1	0.55
Log territory quality (squared)	−76.05 ± 178.33	0.18	1	0.67
Time of day (squared)	<0.001 ± 0.001	0.02	1	0.9
Random effects
σterritory2	57.07 ± 29.65	3.71	1	0.05
σindividual2	38.73 ± 44.95	0.74	1	0.39
σresidual2	345.85 ± 46.29	–	–	–

Reference categories: ¹‘2007 SE season’. ²‘pre-nesting stage’. ³‘male’. ⁴‘primary’.