Table 2.

Relationships between longevity in birds and hypothesized explanatory variables. (n=257 species and 253 contrasts. The models had the statistics F=78.20, d.f.=7249, r²=0.69, p<0.0001; F=135.30, d.f.=4252, r²=0.68, p<0.0001 and F=59.32, d.f.=4249, r²=0.28, p<0.0001. Effect size was Pearson's product–moment correlation coefficients.)

	sum of squares	d.f.	F	p	slope (s.e.)	effect size (Pearson's r)
full model for species
survival rate	0.30	1	19.32	<0.0001	0.26 (0.06)	0.27
body mass	0.39	1	25.16	<0.0001	0.07 (0.01)	0.30
no. of recoveries	2.96	1	190.88	<0.0001	0.10 (0.01)	0.66
latitude	0.06	1	3.63	0.06	−0.00 (0.00)	0.12
migration distance	0.03	1	2.10	0.15	0.02 (0.02)	0.09
age at first reproduction	0.10	1	6.75	0.010	0.12 (0.05)	0.16
cooperative care	0.00	1	0.09	0.77	−0.01 (0.03)	0.02
error	3.86	249
reduced model for species
survival rate	0.29	1	18.53	<0.0001	0.25 (0.06)	0.26
body mass	0.37	1	23.86	<0.0001	0.07 (0.01)	0.29
no. of recoveries	3.00	1	193.24	<0.0001	0.10 (0.01)	0.66
age at first reproduction	0.15	1	9.42	0.0024	0.14 (0.05)	0.19
error	3.92	252
reduced model for contrasts
survival rate	0.03	1	7.97	0.005	0.15 (0.05)	0.18
body mass	0.02	1	5.41	0.021	0.06 (0.03)	0.15
no. of recoveries	0.60	1	171.34	<0.0001	0.09 (0.01)	0.64
age at first reproduction	0.03	1	7.99	0.005	0.17 (0.06)	0.18
error	0.87	249