Figure S1. Map of the study region (a), located in southwest Alaska. (b) Fish are caught in two fishing districts, Nushagak and Naknek-Kvichak. In our study we assessed (c) four populations spawning in the Wood River lakes and (d) five populations spawning in Iliamna Lake.

Figure S2. Timeline of a cohort of sockeye salmon from Bristol Bay, Alaska.

Figure S3. Average length at ocean ages 2 and 3 for male and female sockeye salmon in (a) five Iliamna Lake and (b) four Wood River lakes populations.

Figure S4. Annual proportions of fish caught and standardized selection differentials (SSDs) for the four Wood River lakes sockeye salmon populations and the five Iliamna Lake populations.

Table S1. Spawning site width, average mid-eye to fork of tail length of mature ocean age 2 fish, and proportion of sockeye salmon of ocean age 2 between 1962 and 2009 for each population (Quinn et al. 2001).

Table S2. Marine growth factors used to calculate PMRNs in the sensitivity analysis along with the baseline growth factors (from Lander and Tanonaka 1964; —growth factors 1 and 3; Lander et al. 1966; —growth factor 2; French et al. 1976; —growth factor 4; Ruggerone et al. 2005; —baseline growth factor).

Table S3. The range of LP50 values estimated for Iliamna Lake and Wood River lakes sockeye salmon in the sensitivity analysis based on different marine mortality values and marine growth factors (listed in Table S2).

Table S4. The average proportion of fish caught and the average standardized selection differential (SSD) over all years with available data for the four Wood River lakes sockeye salmon populations and the five Iliamna Lake populations.

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