Effects of Ocean Acidification on Egg & Larval Stages of Baltic Cod
Frommel, A.Y., Schubert, A., Piatkowski, U. and Clemmesen C. 2013. Egg and early larval stages of Baltic cod, Gadus morhua, are robust to high levels of ocean acidification. Marine Biology 160: 1825-1834.
Results of the analysis revealed there was "no effect on hatching, survival, development, and otolith size was found at any stage in the development of Baltic cod," where "in situ levels of pCO2 are already at levels of 1,100 µatm with a pH of 7.2." In fact, they say their data showed that "the eggs and early larval stages of Baltic cod seem to be robust to even higher levels of OA (3,200 µatm), indicating an adaptational response to CO2." Given such findings, in the concluding sentence of their paper, Frommel et al. suggest that "since the Baltic Sea is naturally high in pCO2, its fish stocks may be adapted to conditions predicted in ocean acidification scenarios for centuries to come."