Fig. 4

The offspring survival, including the risk table for all four lineage crosses, with both sexes together. The crosses are represented by different colors. Survival curves are represented by solid lines, whereas dashed lines show 95% confidence intervals. The dark green line and bright brown line show between-lineage crosses, BL x HL and HL x BL, respectively. The bright green line and dark brown line show within-lineage crosses, BL x BL and HL x HL, respectively