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Table 1.

Oxygen consumption and cardiac parameters measured in Atlantic cod exposed to a 1.7°C h−1 temperature increase from 10-11°C (resting) until they reached critical thermal maximum

Temperature (°C)
RestingMaximumCTM
Oxygen consumption (mg kg−1 h−182.2±3.7a 210.8±7.2b  
Cardiac output (ml min−1 kg−121.5±0.8a 52.6±2.8b 28.4±3.5a 
Heart rate (beats min−136.3±1.7a 71.8±3.6b 37.4±4.9a 
Stroke volume (ml kg−10.60±0.04a 0.76±0.05a 0.80±0.08b 
Temperature (°C)
RestingMaximumCTM
Oxygen consumption (mg kg−1 h−182.2±3.7a 210.8±7.2b  
Cardiac output (ml min−1 kg−121.5±0.8a 52.6±2.8b 28.4±3.5a 
Heart rate (beats min−136.3±1.7a 71.8±3.6b 37.4±4.9a 
Stroke volume (ml kg−10.60±0.04a 0.76±0.05a 0.80±0.08b 

Maximum refers to the maximum value recorded for each fish prior to critical thermal maximum (CTM), while cardiac parameters reported at CTM were measured very shortly (within 1 min) after the fish lost equilibrium.

Values are means ± s.e.m. (N=6-9). Dissimilar letters within each row indicate values that are significantly different(P<0.05).

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