Figure 2

Probabilities for being in each stage in dependence on age. All individuals start in developmental stage one. Developmental stages are labeled where possible. From left to right, one can track the bands for successive stages where adjacent stages always have different gray levels. Only data from two pairs are represented, the ones which have the largest sample sizes. There are two absorbing states: death (black) and hatched (white), where we assume that hatched individuals do not die within this experiment such that proportions hatched and dead at the end of the experiment indicate actual proportions of individuals in each of these absorbing states. The ‘water’ groups consist of individuals in the two different control groups pooled. C. brunneus embryos were observed for a shorter duration than C. magdalenae, and per panel, we stop the shading at the oldest age where embryos were observed. Gray bars above the ‘Air’ panels for the Desiccation groups indicate the ages where all embryos were in the treatment. Black box plots to the right of these bars indicate the distribution of lengths of dry periods experienced by surviving individuals. It can be seen that there is more variation in the length of the dry period experienced for C. brunneus embryos but that minimum periods are very similar between pairs.