Table 3.

Regressions of phylogenetically independent comparisons of molecular branch lengths on mass-specific BMR

Taxon	Gene	y axis	All data points				Outliers removed
			n	r2	β	P	n	r2	β	P
Arthropoda	18S	BLT	13	0.027	0.123	0.573	10	0.120	0.262	0.297
Arthropoda	COX1	BLdN	18	0.041	−0.192	0.408	14	0.028	0.124	0.551
Arthropoda	16S	BLT	16	0.063	−0.148	0.327	14	0.026	−0.105	0.565
Mollusca	18S	BLT	7	0.059	0.209	0.564	6	0.064	−0.134	0.583
Mollusca	COX1	BLdN	16	0.032	0.128	0.489	13	0.180	0.226	0.130
Mollusca	16S	BLT	10	0.002	0.031	0.886	8	0.002	−0.022	0.901
Mammalia	VWF	BLdN	14	0.136	0.153	0.176	11	0.006	0.018	0.813
Mammalia	VWF	BLdS	13	0.001	0.012	0.929	11	0.114	0.176	0.282
Mammalia	CytB	BLdN	28	0.002	−0.005	0.964	24	0.033	0.001	0.857
Mammalia	CytB	BLdS	12	0.052	0.840	0.455	11	0.145	−0.462	0.222
Mammalia	12S	BLT	29	0.008	−0.060	0.641	26	0.017	0.067	0.520
Aves	CytB	BLdN	21	0.011	0.168	0.645	17	0.004	0.109	0.807
Aves	CytB	BLdS	8	0.032	−0.395	0.644	7	0.003	0.155	0.893
Aves	ND2	BLdN	10	0.051	−0.587	0.503	9	0.247	−0.617	0.143
Aves	ND2	BLdS	7	0.011	−0.259	0.804	6	0.099	−0.422	0.492

Regressions were Type I and forced through the origin. Shown are the number of comparisons: n, the r², the estimated slope: β, and the P value. BL_dN, nonsynonymous branch lengths; BL_dS, synonymous branch lengths; BL_T, total branch for RNA-coding genes.