Fig. 2

Egg loss and egg survival rate during arrest. a Egg loss after 6–9 months of arrest. When Oxygen is not available, egg loss is negligible, even after > 250 days of arrest. Conversely, 90% of eggs are lost after only 180 days in normoxic conditions (black bars, ZTM loss). Egg loss is presented as means of 6–10 replicates and error bars are 95% CL. Outlines of mean nauplii and unhatched egg rates are seen as dotted and dashed lines, respectively. b Egg survival rate in hypoxic conditions remains unchanged over 120 days but is severely reduced at ca 280 days of embryonic arrest. The survival rate (ZTM) in the two experimental setups without Oxygen were not statistically different from each other, whereas the survival rate (ZTM) for eggs exposed to Oxygen was significantly lower (p < 0.01, Fs = 5.91, d.f. (a1 + b2 − 4) = 112 & Fs = 6.80, d.f. (a1 + b2 − 4) = 113). Extinction for samples in hypoxia is reached after ca 300 days. In normoxic conditions, the mean egg survival rate (ZTM) drops between each time point, reaching near extinction after < 200 days of embryonic arrest. Data points are ZTM of 6–10 replicates, lines represent linear regressions, and error bars are 95% CL