Intra-egg oxygen dissolved in Octopus maya embryos

Those data show, for the first time, oxygen concentration levels in the perivitelline liquid of Octopus maya embryos. Data are shown as a percentage of oxygen saturation, measured at 24°C, using a Needle-type oxygen microsensor (Loligo Systems, Denmark). The sensor was placed in an automated micromanipulator (PreSense, Germany), and the eggs were placed in a supporting device at 38° of inclination. In such form, the sensor was inserted in the perivitelline liquid, registering the oxygen dissolved inside the eggs. The final oxygen level was recorded between one and three min after the sensor insertion. Data of oxygen dissolved during embryo development were grouped as blastulation, organogenesis, activation, and growth phases. A negative power curve was constructed for the relationship between oxygen dissolved in the perivitelline liquid and embryo development