Figure 9.

Variation in the desirabilities of different harvest regimes. The three panels correspond to increasing values of ϕ, which describes the importance managers attach to avoiding harvest-induced evolutionary change: (A) ϕ = 0.1, (B) ϕ = 0.5, (C) ϕ = 1.5, and (D) ϕ = 2. The steepness of selectivity curves is constant across panels, a = 5.9. The vertical axis shows the length at 50% selectivity, measured as a fraction of the charr's maximum length, while b_H, which scales the density-dependent component of harvesting, is shown along the horizontal axis. The desirabilities of different harvest regimes are color-coded, with darker blue corresponding to lower desirabilities, and thus to less successful harvest regimes, while red indicates high desirabilities. Values shown for each harvest regime are means of 15 replicate model runs.