TABLE 2.

Linear regressions and allometric equations describing the relationship between body mass (BM) and ECG parameters for mammals separated by ecological group as appropriate.

Response variable	n	Ecological group	Linear equation of log10-transformed data	Allometric equation
HR	73	All mammals	−0.221(BM) +2.346	221.7(BM)–0.22
P	21	Terrestrial mammals	0.209(BM) −1.530	0.029(BM)0.21
P	12	Marine mammals	0.208(BM) −1.439	0.036(BM)0.21
PR	67	All mammals	0.207(BM) −1.178	0.066(BM)0.21
QRS	51	Terrestrial mammals	0.189(BM) −1.530	0.029(BM)0.19
QRS	19	Marine mammals	0.189(BM) −1.413	0.039(BM)0.19
QT	49	Terrestrial mammals	0.225(BM) −0.918	0.121(BM)0.23
QT	17	Marine mammals	0.225(BM) −1.000	0.100(BM)0.23

The number of data points included in the model are also listed (“n”). The units for these equations are kg for BM, bpm for HR, and s for P, PR, QRS, and QT.