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Fig. 1 | Helgoland Marine Research

Fig. 1

From: Oxygen consumption rate and Na+/K+-ATPase activity in early developmental stages of the sea urchin Paracentrotus lividus Lam.

Fig. 1

Time course of oxygen consumption rate of unfertilized and fertilized eggs of the sea urchin Paracentrotus lividus Lam. During a 15-min exposure in an oxygen electrode chamber, unfertilized eggs showed a low and stable oxygen consumption rate (N.E.; 0–15 min). The times of insemination (I), formation of the fertilization membrane (F) and addition of rotenone (RO) are indicated by arrows. Mean values ± SD of six samples each

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