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Figure 5


Fig. 5. Measured (A) and modeled (B) radial profiles of O2 concentration in artificial egg masses. Masses were constructed from very low melting point agarose and 5-day-old fertilized embryos of the Antarctic sea urchin Sterechinus neumayeri. The model was parameterized using separately measured values of embryo metabolic rate, O2 diffusion coefficient, cylinder size, and embryo density. In the model panels (B), horizontal black lines represent expected O2 levels (air saturated throughout).





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