Simultaneous presentation of trade-offs between mean CYPR (red contours and figures) and mean CSPR (black contours and figures) as a function of fishing mortality (F) and the age of knife-edge recruitment or the age of knife-edge selection for L. stappersii in Lake Tanganyika (left panels) and L. niloticus in Lake Victoria (right panels), considering that the fisheries operate at mean F_CYPR (vertical, blue solid dash line), mean F_0.1 (vertical, blue solid line), or mean F_35%CSPR for L. stappersii and mean F_40%CSPR for L. niloticus (vertical and light green dash line) as estimated from baseline analyses (Table 3).