Fig. 2

State-dependent mortality (left) and its effect on the expected fitness (right). The red line is the terminal fitness \(\Phi _{0}(y)\). The blue line is \(\Phi _{\tau }(y)\) when \(\tau =50\). Gray lines are \(\Phi _{\tau }(y)\) when \(\tau\) is between 1 and 49. \(\Phi _{\tau }(y)\) decreases monotonically with \(\tau\) such that the \(\tau\)th gray line below the red line is \(\Phi _{\tau }(y)\)