Yield-per-recruit curves for pike in the Anzali Wetland (SW Caspian Sea) using a size-independent natural mortality estimate (solid line) and a size-dependent estimate (dashed line) for three management scenarios. (a) No minimum landing size (MLS), (b) MLS = 35 cm FL and (c) MLS = 42 cm FL. Black circles are F_0.1, white squares are F_MSY and the vertical dotted lines indicate the estimated current level of fishing mortality. Note different y-axis scales for different MLS scenarios. F_MSY could not be estimated for scenarios (b) and (c).