Table 1.

Among species and genera comparisons (I).

		With gentes			Without gentes	Statistical tests for log-transformed variables
		N	Mean (SE)	N	Mean (SE)	t-tests
Analyses with species information	Log population density	10	-0.265 (0.444)	69	-2.078 (0.324)	t = 2.08, P = 0.041
	Log CV of population density	10	4.764 (0.190)	69	5.274 (0.059)	t = 3.00, P = 0.004
	Phylogenetically independent contrasts		Beta (SE)		Corrected df	Regression through the origin
	Log population density		0.258 (0.110)		63	t = 2.35, P = 0.022
	Log CV of population density		-0.272 (0.110)		63	t = 2.49, P = 0.016
Analyses with genus information		N	Mean (SE)	N	Mean (SE)	t-tests
	Log population density	10	1.304 (0.308)	21	-0.960 (0.474)	t = 3.13, P = 0.004
	Log CV of population density	10	4.353 (0.151)	21	5.160 (0.111)	t = 4.22, P = 0.001
	Phylogenetically independent contrasts		Beta (SE)		Corrected df	Regression through the origin
	Log population density		0.464 (0.164)		27	t = 2.82, P = 0.015
	Log CV of population density		-0.580 (0.151)		27	t = 3.83, P = 0.001

Among species and genera comparisons of mean and coefficient of variation (CV) in population density of suitable host passerine species for which the European cuckoo has or has not evolved specific gentes (i.e., highly mimetic egg morphs). Possible phylogenetic dependence of data was taken into account by using pair-wise comparisons of closely related taxa (i.e., mean values of species with and without gentes within families) and phylogenetically independent contrasts.