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Table 2.

Cardiorespiratory variables of S. lalandi at zero and maximum swimming velocities

	U (BL s⁻¹)
	20°C					25°C
Variable	0	2.3	Factorial change	0	2.3	Factorial change
Ṁ_O2 (mg min⁻¹ kg⁻¹)	1.55	10.93	7.0	3.31^*	13.32^*	4.0
V̇_b (ml min⁻¹ kg⁻¹)	29.2	37.6	1.3	43.3^*	52.7^*	1.2
f_H (beats min⁻¹)	77.1	94.9	1.2	117.1^*	145.1^*	1.2
V_S (ml beat⁻¹ kg⁻¹)	0.38	0.40	1.0	0.37	0.36	1.0
(Ca_O2-Cv̄_O2)(mg ml⁻¹)	0.06	0.29	4.7	0.08	0.25	3.3
V̇_b/Ṁ_O2(ml mg⁻¹)	18.8	3.4	−5.5	13.1^*	4.0	−3.3

	U (BL s⁻¹)
	20°C					25°C
Variable	0	2.3	Factorial change	0	2.3	Factorial change
Ṁ_O2 (mg min⁻¹ kg⁻¹)	1.55	10.93	7.0	3.31^*	13.32^*	4.0
V̇_b (ml min⁻¹ kg⁻¹)	29.2	37.6	1.3	43.3^*	52.7^*	1.2
f_H (beats min⁻¹)	77.1	94.9	1.2	117.1^*	145.1^*	1.2
V_S (ml beat⁻¹ kg⁻¹)	0.38	0.40	1.0	0.37	0.36	1.0
(Ca_O2-Cv̄_O2)(mg ml⁻¹)	0.06	0.29	4.7	0.08	0.25	3.3
V̇_b/Ṁ_O2(ml mg⁻¹)	18.8	3.4	−5.5	13.1^*	4.0	−3.3

Maximum swimming velocity (U_max)=2.3 BLs⁻¹.

Values calculated from regression equations in Table 1; for N and error values, see Table 1. U_max was taken to be 2.3 BL s⁻¹at both temperatures (see text). ^*Significantly different from the corresponding measurement at 20°C (P<0.05).

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