Fraser River sockeye salmon: data synthesis and cumulative impacts

Figure 3.3-2. Life history of Fraser River sockeye salmon illustrating generalized movement patterns among habitats. Arrows represent movements up to thereturn to the coast but do not show return passage through the Strait of Georgia and upstream migration to spawning grounds. Potential stressors areassigned to general areas/life stages, not specific locations. Box C shows the Fraser River watershed, in which spawning, incubation, emergence, nurserylake rearing, and outmigration occur. Box B shows the Lower Fraser River, Strait of Georgia, Johnstone Strait, and Strait of Juan de Fuca, throughwhich post-smolts pass on during their migration to the Gulf of Alaska, and returning adults pass on their journey back to the Fraser River. The dottedline indicates that there is limited evidence for the use of Juan de Fuca by post-smolts. Box A shows the Northeast Pacific Ocean, where maturingsockeye salmon spend two winters after completing their migration up the coast then return to the Fraser River. The movement patterns within the oceanare highly generalized, but based on McKinnell et al. (2011, Figure 4). Refer to McKinnell et al. (2011) for further details on ocean distribution andpatterns.19