Table 1.

Results of regressions of life-history variables and adult body mass.

trait	lineage	slope	s.e.	intercept	s.e.	d.f.	r2	p
newborn mass	placentals	0.93	0.01	−1.11	0.03	888	0.95	0.00
	marsupials	0.50	0.04	−2.32	0.14	54	0.70	0.00
weaning mass	placentals	0.91	0.01	−0.26	0.03	391	0.97	0.00
	marsupials	0.87	0.03	−0.24	0.10	64	0.92	0.00
gestation time	placentals	0.24	0.00	−0.39	0.02	1098	0.73	0.00
	marsupials	0.04	0.02	−0.22	0.05	94	0.06	0.02
age at weaning	placentals	0.22	0.01	−0.38	0.02	925	0.52	0.00
	marsupials	0.20	0.01	0.13	0.04	109	0.63	0.00
development	placentals	0.24	0.01	−0.08	0.02	853	0.70	0.00
time	marsupials	0.17	0.01	0.29	0.04	83	0.66	0.00
age at first	placentals	0.27	0.01	0.18	0.03	886	0.57	0.00
reproduction	marsupials	0.10	0.02	0.76	0.06	101	0.22	0.00
max. lifespan	placentals	0.21	0.01	1.41	0.02	737	0.65	0.00
	marsupials	0.21	0.02	1.39	0.07	93	0.51	0.00
litter size	placentals	−0.13	0.00	0.74	0.01	1432	0.41	0.00
	marsupials	−0.27	0.02	1.09	0.05	167	0.57	0.00
litters per year	placentals	−0.12	0.01	0.52	0.02	869	0.39	0.00
	marsupials	−0.02	0.02	0.23	0.06	111	0.01	0.40
annual	placentals	−0.26	0.01	1.34	0.03	847	0.59	0.00
fecundity	marsupials	−0.28	0.03	1.33	0.08	110	0.47	0.00
lifetime	placentals	−0.02	0.01	1.24	0.03	530	0.01	0.10
fecundity	marsupials	−0.02	0.04	1.43	0.13	93	0.00	0.57