Table 3.

Generalized least square regression results for Log₁₀-transformed instantaneous heart rate(Log[if_H]), instantaneous stroke volume (Log[iSV]), and instantaneous cardiac output (Log[iCO]), against Log₁₀-transformed time during dive or recovery (log[time]), maximal dive duration (log[max]), or body mass (log[M_b]). Shown are the parameters (±s.e.) for the best model, the χ², and P-value against nested models and the r²_m/r²_c are the marginal and conditional r², respectively. SV is in ml, CO in ml · min⁻¹, durations in s, and M_b in kg.

Phase	Dependent variable	β0	Log[time]	Log[max]	Log(Mb)	χ2	P-ϖαλυε	r2m/r2c
Apnea	Log(fH)	1.80 ± 0.03	−0.039 ± 0.008	−0.067 ± 0.012	—	28.8	<0.01	0.07/0.53
	Log(SV)	1.11 ± 0.26	−0.057 ± 0.005	—	0.54 ± 0.12	20.9	<0.01	0.16/0.82
	Log(CO)	2.35 ± 0.45	−0.091 ± 0.011	−0.059 ± 0.018	0.34 ± 0.20	10.8	<0.01	0.19/0.70
Recovery	Log(fH)	1.98 ± 0.02	−0.169 ± 0.007	—	—	5.6	<0.05	0.47/0.63
	Log(SV)	2.38 ± 0.03	−0.067 ± 0.004	—	—	202	<0.01	0.12/0.80
	Log(CO)	4.36 ± 0.03	−0.24 ± 0.01	—	—	368	<0.01	0.46/0.68