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Table 3.

Kinetics of the Na+ current in crucian carp, rainbow trout and burbot ventricular myocytes

Acclimation temperature (°C)
Cold-acclimated (c.a.)
Warm-acclimated (w.a.)
Time constant τ (ms)+4N+11N+11N+18N
Crucian carp         
   Recovery from inactivation 40.27±3.72a,‡ 42.69±3.30a,* 12 29.61±3.16a,† 19.25±2.05a 10 
   Rested-state inactivation 22.85±3.38a,‡ 11 24.39±4.13a 13 21.67±3.96a 32.48±3.78a 12 
   Kinetics of inactivation 1.69±0.02a,†,‡ 10 1.32±0.11a 14 1.25±0.05a,† 0.66±0.02a 
Rainbow trout         
   Recovery from inactivation 28.17±2.39b,‡ 10 22.29±1.72b 12 21.69±1.79a 19 17.26±1.63a 13 
   Rested-state inactivation 24.36±1.37a 10 25.25±1.89a 11 29.60±2.25a 12 29.85±4.02a 13 
   Kinetics of inactivation 1.12±0.05b,†,‡ 11 0.64±0.02b,* 10 0.99±0.05b,† 16 0.62±0.03a 10 
Burbot         
   Recovery from inactivation 47.36±3.10a,† 10 24.22±2.20b 10     
   Rested-state inactivation 19.39±4.01a 10 18.26±3.66a     
   Kinetics of inactivation 1.86±0.08a,† 14 0.89±0.05b 11     
Acclimation temperature (°C)
Cold-acclimated (c.a.)
Warm-acclimated (w.a.)
Time constant τ (ms)+4N+11N+11N+18N
Crucian carp         
   Recovery from inactivation 40.27±3.72a,‡ 42.69±3.30a,* 12 29.61±3.16a,† 19.25±2.05a 10 
   Rested-state inactivation 22.85±3.38a,‡ 11 24.39±4.13a 13 21.67±3.96a 32.48±3.78a 12 
   Kinetics of inactivation 1.69±0.02a,†,‡ 10 1.32±0.11a 14 1.25±0.05a,† 0.66±0.02a 
Rainbow trout         
   Recovery from inactivation 28.17±2.39b,‡ 10 22.29±1.72b 12 21.69±1.79a 19 17.26±1.63a 13 
   Rested-state inactivation 24.36±1.37a 10 25.25±1.89a 11 29.60±2.25a 12 29.85±4.02a 13 
   Kinetics of inactivation 1.12±0.05b,†,‡ 11 0.64±0.02b,* 10 0.99±0.05b,† 16 0.62±0.03a 10 
Burbot         
   Recovery from inactivation 47.36±3.10a,† 10 24.22±2.20b 10     
   Rested-state inactivation 19.39±4.01a 10 18.26±3.66a     
   Kinetics of inactivation 1.86±0.08a,† 14 0.89±0.05b 11     

Dissimilar letters indicate a statistically significant difference between species; * between w.a. and c.a. animals of the same species; between experimental temperatures; between c.a. and w.a. fish in their physiological body temperatures.

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