Estimation of chum salmon migration routes
The estimated spatial scale of migration in salmon suggests that their mobility increases with somatic growth (a = 5.189 ± 0.118 andb = 0.881 ± 0.143, Fig. S5). The state-space model successfully reproduced the long-distance migration of two chum salmon individuals from the western NP (Fig. 3, orange areas in panels 1–5) to the Bering Sea (Fig. 3, orange areas in panels 6–9), supporting a previously reported migration pattern for this species (Seeb et al . 2004; Urawa et al . 2000; 2005). In addition, we found that both salmon individuals migrated onto the Bering Sea Shelf during the later stages of their growth (Fig. S5).