Figure 2.

Effects of CO₂ on krill development. (a) An embryo reared under current surface pCO₂ developed into the limb bud stage; (b) an embryo reared at 2000 µatm pCO₂. Embryonic development was disrupted during gastrulation with a larger portion of the ectoderm appearing irregular. (c) Comparison of embryonic development under 380, 1000 and 2000 µatm pCO₂ conditions determined 7–10 days of spawning during 2009 experiments. Dark blue, hatched; light blue, limb formation; yellow, blastula–gastrula; pink, cleavage; red, no development. Scale bar, (a,b) 0.6 mm.