Table 1. The results of GLMs investigating whether maternal body condition influenced a) primary (n = 89) and b) secondary (n = 88) brood sex ratio.

Factor	d.f. Effect	SE	z	P
a) Primary
Year	2	0.24	0.21	0.84
Maternal condition	1	0.19	−0.17	0.86
Age	1	0.17	−0.04	0.97
Lay date	1	0.02	0.64	0.52
Maternal condition *Year	2	0.38	2.75	0.006
b) Secondary
Year	2	0.25	−0.40	0.69
Maternal condition	1	0.20	−0.16	0.87
Age	1	0.16	−0.05	0.96
Lay date	1	0.03	0.55	0.58
Maternal condition *Year	2	0.37	2.81	0.005