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Fig. 5 | Frontiers in Zoology

Fig. 5

From: Non-invasive quantification of cardiac stroke volume in the edible crab Cancer pagurus

Fig. 5

Time courses of heart rate of C. pagurus under different levels of water PO2. Heart rates were recorded with IR photo-plethysmographs at 12 °C water temperature. After at least 15 h of normoxic control, water PO2 was reduced to 15% air saturation by adding N2 gas. Hypoxic conditions were maintained for 6 h, after which the aeration was switched back to ambient air. a and b are two runs on animal 1, separated by one week of recovery; c = animal 2; d = animal 3. Note, the different/variable pattern under normoxic conditions, in contrast to hypoxia

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