Abstract
1. 1. Theoretical predictions of embryonic oxygen comsumption based on diffusion theory and measurements of the gas composition of the air-space were in good agreement with oxygen consumption measurements made with a simple respirometer. 2. 2. Embryos confined within high porosity eggshells could satisfy their high oxygen demand in the latter stages of incubation but embryos within low porosity shells showed a reduced rate of metabolism. 3. 3. The limiting effect of low eggshell porosity on the availability of oxygen was the major factor affecting the weight of the embryo a few days prior to hatch.
Published Version
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