Figure 2.

Propensity for sex in each pond as indicated by the population density for sex initiation. (a) Clonal means (dots) and population means (horizontal bars) as estimated for the nine populations. (b) Relationship between the estimated population means and the pond hydroperiod (fraction of the year flooded). The solid line indicates the least-squares regression fitting. (c) Relationship between the estimated population means and the estimated environmental predictability in the ponds. The solid line indicates the least-squares regression fitting.