Abiotic conditions in cephalopod (Sepia officinalis) eggs: embryonic development at low pH and high pCO2

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Physiological basis for high CO2 tolerance in marine ectothermic animals: pre-adaptation through lifestyle and ontogeny? (2009, background): “Recent determinations of pH, p O Sepia ofﬁcinalis in its egg casing (perivitelline ﬂuid) suggest that the egg case serves as a signiﬁcant barrier to diffusion, of both CO 2 and O 2 (Gutowska and Melzner, 2009).”
Effects of increased pCO2 and temperature on trace element (Ag, Cd and Zn) bioaccumulation in the eggs of the common cuttlefish, Sepia officinalis (2009, background): “Additionally, a recent study has demonstrated that at the end of the egg 369 development, the cuttlefish embryo was surrounded by 10-fold higher pCO2 values in the 370 perivitelline fluid (i.e., ≈ pH 7.4) than those in seawater because of the embryo’s respiration 371 (Gutowska and Melzner, 2009).”
The Impact of Ocean Acidification on Reproduction, Early Development and Settlement of Marine Organisms (2011, unknown): “In the lecithotrophic cephalopod, Sepia officinalis, embryos developed with no impact on calcification in low pH [62], as did the sea star, Crossaster papposus over the 38 day duration of the experiment [32].”