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).