Estimated relative frequency of M-form vs. S-form survivors (Selection Ratio) when culling a mixed M/S larval population using increasing ammonia concentrations. A Selection Ratio of one (horizontal dashed line) corresponds to equal numbers of M and S survivors. Values above this line identify the region where M-form survivors exceed S-form survivors, and vice versa for values below the line. Shading identifies the range of concentrations for which observed larval mortality was 100% in both forms.
Tene Fossog et al. BMC Ecology 2013 13:1 doi:10.1186/1472-6785-13-1