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Table 2.

Trout oxygen uptake, arterial blood O2 content, arterial pH and apparent rates of blood O2 unloading between the dorsal aorta and the red muscle, as a function of waterPO2

PwO2 (mmHg)
140 (normoxia)10075
O2 (mmol kg-1 h-14.76±0.79 5.11±0.90 4.63±0.64 
CaO2 (mmol ml-14.76±0.45 4.41±0.36 4.20±0.35 
pHa 7.82±0.02 7.81±0.03 7.84±0.03 
Apparent O2 unloading (mmol ml-11.46±0.37 1.80±0.29 2.26±0.37 
PwO2 (mmHg)
140 (normoxia)10075
O2 (mmol kg-1 h-14.76±0.79 5.11±0.90 4.63±0.64 
CaO2 (mmol ml-14.76±0.45 4.41±0.36 4.20±0.35 
pHa 7.82±0.02 7.81±0.03 7.84±0.03 
Apparent O2 unloading (mmol ml-11.46±0.37 1.80±0.29 2.26±0.37 

O2, rate of oxygen uptake; CaO2, arterial blood O2 content; pHa, arterial pH; PwO2, water PO2.

All values are mean ± s.e.m., N=6.

Apparent O2 unloading refers to the decline in total O2 content between blood in the dorsal aorta and in the RM,calculated as described in the text. There was no significant effect of hypoxia upon any variable.

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