Table 1 Heart rate and temperature tolerance differences between populations acclimated to two different temperatures.

From: Atlantic salmon show capability for cardiac acclimation to warm temperatures

Acclimation temperature

12 °C

20 °C

Population

Alta

Dordogne

Alta

Dordogne

Mass (g)

6.7±0.8a

5.3±0.6a

5.2±0.8A

7.0±0.6A

Fork length (mm)

86±3a

77±2a

77±3A

83±2A

TAB (°C)

16.4±0.6a

15.7±0.4a,*

17.6±0.6A

19.0±0.5A

TQB (°C)

16.5±0.6a

16.2±0.7a,*

17.7±0.7A

20.2±0.6B

Tmax (°C)

22.7±0.8a,*

21.4±0.6a,*

27.0±0.8A

27.1±0.6A

Tarr (°C)

22.9±0.7a,*

21.5±0.5a,*

27.5±0.7A

27.5±0.5A

MaxfHmax (bpm)

155±5a,*

149±5a,*

194±6A

201±5A

fH before atropine (bpm)

74±4a,*

76±3a,*

55±4A

56±3A

fH after atropine (bpm)

86±1a,*

86±1a,*

76±1A

78±1A

  1. Size, Arrhenius break point temperature (TAB), Q10 break point temperature (TQB), temperature at which the heart starts to beat arrhythmic (Tarr), maximum value for maximum heart rate (MaxfHmax) and its associated temperature Tmax and heart rate (fH) before and after atropine injection for two populations of Atlantic salmon (Alta and Dordogne) kept at two acclimation temperatures (12 and 20 °C). Alta population, N=5, and Dordogne population, N=8, for both acclimation temperatures. Different lowercase letters indicate significant differences between populations at 12°C and uppercase letters at 20°C. The * indicates significant difference between acclimation temperatures at P< 0.05 (two-way ANOVA with Holm-Sidak post-hoc test).
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