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Figure 2


Fig. 2. Traces showing an example of a measurement of mean circulatory filling pressure (MCFP) in a 250 g S. marmoratus ventilating its gills in normoxic water (PO2>130 mmHg). PCV, central venous pressure; PDA, dorsal aortic pressure. The arrow indicates occlusion of blood flow from the heart to measure MCFP. PCV after 15–20 s of occlusion was taken as MCFP (1 cmH2O=0.098 kPa).