Fig. 4
From: Non-invasive quantification of cardiac stroke volume in the edible crab Cancer pagurus
Time courses of heart beat signals of C. pagurus recorded with infra-red photo-plethysmography. Exemplary presentation of individual IR-PPG recordings between normoxia and hypoxia for three individuals. a-b) animal 1; c-d) animal 2; e-f) animal 3
