Fig. 2. Resilience of a population complex of sockeye salmon in Bristol Bay, Alaska (Hilborn et al. 2003). Upper left: location of fishing districts and major drainage systems. Upper right: total sockeye catch over the last century. Lower left: number of recruits per spawner in each major drainage from 1955 to 1995. Lower right: escapement and proportion of spawning sockeye in Lake Illiamna and its tributaries (copyright U.S. National Academy of Sciences 2003).