Table 22.

Results from a linear mixed effects model examining factors affecting nest sizes of blue tits (Cyanistes caeruleus) in the different compartments of Wytham woods, Oxfordshire (n = 873) across three breeding seasons, d.f.s were calculated from Satterthwaite approximations, p-values were calculated from Wald tests. This model had an R² of 0.071.

parameter	estimate ± s.e.	T-value	p-value
intercept	0.321 ± 0.010	31.871	2 × 10−16
compartment:a
C	0.056 ± 0.012	4.515	7.21 × 10−6
CP	−0.029 ± 0.015	−1.881	0.060
E	−0.007 ± 0.012	−0.531	0.596
MP	0.006 ± 0.014	0.438	0.661
O	0.039 ± 0.011	3.417	6.62 × 10−4
P	0.006 ± 0.020	0.308	0.758
SW	−0.002 ± 0.014	−0.106	0.916
W	0.035 ± 0.013	2.698	0.007
year:b
2002	−0.020 ± 0.009	−2.264	0.024
2003	−0.016 ± 0.008	−1.962	0.050

^aReference category: B.

^bReference category: 2001.