Table 2.

The significance (determined by z-tests) of the estimates shown in Figure 4.

Trait	Selection gradients for:	P (genetic vs phenotypic)	P (genetic vs environmental)
Tarsus	BVincl	0.23	0.22
	BVexcl	0.14	0.18
	genetic comp.	0.51	0.19
Song rate	BVincl	0.24	0.017
	BVexcl	0.39	0.24
	genetic comp.	0.18	0.27
Beak colour	BVincl	0.17	0.003
	BVexcl	0.08	0.008
	genetic comp.	0.32	0.17

The first column shows the difference between the genetic and the phenotypic selection gradients and the second column the difference between the genetic and the environmental selection gradients.