The Company of Biologists

Table 1.

Resting metabolic rate,V̇_CO₂ and linear regression statistics for the relationship between treadmill speed andV̇_CO₂ in individual tarantulas

	Mass (g)	RMR (μl CO₂ h^-1)	V̇_CO₂max (μl CO₂ h^-1)	Factorial scope	MAS (m h^-1)	y-intercept^{^†}(μl CO₂ h^-1)	Slope, C_min^{^†}(μl CO₂ m^-1)	C_min (ml O_2g^-1km^-1)^{^‡}
	Males
	9.35	156.1	2486.85	15.93	73.44	-308.83±154.27	38.25±2.82	4.45
	6.80	195.5	1432.66	7.33	73.44	925.36±43.12	7.02±0.88	1.15
	5.39	139.2	1312.95	9.43	55.44	300±267.59	16.48±6.29	3.32
	5.02	131.2	1060.42	8.08	55.44	-165.68±555.53	20.83±11.86	4.59
	9.23	204.2	1882.95	9.22	46.80	1356.19±64.33	9.01±1.51	1.06
	5.68	116.2	1722.62	14.82	73.44^{^*}	319.97±59.00	19.51±1.17	3.65
Mean	6.91	157.07	1650.24	10.80	63.00	404.50	18.52	3.04
	Females
	18.90	183.5	2323.17	12.54	55.44^{^*}	-539.06±61.78	51.48±1.32	2.96
	17.55	296.1	2899.30	9.79	73.44	324.81±160.47	34.45±2.93	2.13
	9.52	100.1	2556.22	25.53	80.64	530.36±262.78	23.09±4.32	2.64
	17.20	207.6	3162.01	15.23	55.44	1275.27±343.66	31.48±8.08	1.99
	14.07	192.0	1392.64	7.25	36.36^{^*}	—	—	—
	17.90	237.4	1472.28	6.20	55.44^{^*}	301.32	21.12	1.28
Mean	15.72	208.78	2300.94	12.75	59.46	378.54	32.32	2.20

	Mass (g)	RMR (μl CO₂ h^-1)	V̇_CO₂max (μl CO₂ h^-1)	Factorial scope	MAS (m h^-1)	y-intercept^{^†}(μl CO₂ h^-1)	Slope, C_min^{^†}(μl CO₂ m^-1)	C_min (ml O_2g^-1km^-1)^{^‡}
	Males
	9.35	156.1	2486.85	15.93	73.44	-308.83±154.27	38.25±2.82	4.45
	6.80	195.5	1432.66	7.33	73.44	925.36±43.12	7.02±0.88	1.15
	5.39	139.2	1312.95	9.43	55.44	300±267.59	16.48±6.29	3.32
	5.02	131.2	1060.42	8.08	55.44	-165.68±555.53	20.83±11.86	4.59
	9.23	204.2	1882.95	9.22	46.80	1356.19±64.33	9.01±1.51	1.06
	5.68	116.2	1722.62	14.82	73.44^{^*}	319.97±59.00	19.51±1.17	3.65
Mean	6.91	157.07	1650.24	10.80	63.00	404.50	18.52	3.04
	Females
	18.90	183.5	2323.17	12.54	55.44^{^*}	-539.06±61.78	51.48±1.32	2.96
	17.55	296.1	2899.30	9.79	73.44	324.81±160.47	34.45±2.93	2.13
	9.52	100.1	2556.22	25.53	80.64	530.36±262.78	23.09±4.32	2.64
	17.20	207.6	3162.01	15.23	55.44	1275.27±343.66	31.48±8.08	1.99
	14.07	192.0	1392.64	7.25	36.36^{^*}	—	—	—
	17.90	237.4	1472.28	6.20	55.44^{^*}	301.32	21.12	1.28
Mean	15.72	208.78	2300.94	12.75	59.46	378.54	32.32	2.20

RMR, resting metabolic rate; MAS, maximum aerobic speed; C_min, minimum cost of transport; RQ, respiratory quotient.

Individuals that reached anaerobic speeds.

Values include the standard error of the slope and intercept.

Assumes that RQ=0.92 (see text).