Salmon run

A salmon run is the seasonal migration of salmon from the sea into freshwater to reproduce. It links ocean feeding grounds with natal rivers and streams.

Salmon navigation: The ability of salmon to orient during migration using environmental cues, including Earth’s magnetic field and chemical signals. These cues help returning salmon locate the coast and their home river.
Salmon: Salmon are migratory ray-finned fish in the genera Salmo and Oncorhynchus. The run is one phase in the life cycle of these migratory fish.
Salmon fishery: A commercial, subsistence, or recreational fishery that harvests salmon. Run timing and abundance shape when and how fisheries can operate.
Salmon-derived nutrients: Nutrients carried by migrating salmon from marine feeding grounds into freshwater and nearby terrestrial ecosystems. Spawning salmon transport marine nutrients far upstream.
Bristol Bay sockeye salmon run: The annual migration of sockeye salmon into rivers and lakes draining to Bristol Bay, Alaska. Its large returns support globally significant fisheries and local communities.
Olfactory imprinting: A form of learning in which an animal records and later recognizes particular odors. Young salmon learn a river’s chemical signature, which helps adults return to it.
Anadromy: Anadromy is a life-history pattern in which fish grow mainly at sea and migrate into freshwater to reproduce. It describes the sea-to-river pattern shared by most salmon runs.
Pacific Northwest salmon culture: The cultural traditions and relationships with salmon among Indigenous peoples and communities of the Pacific Northwest. Returning salmon sustain foodways, ceremony, and governance across the region.
Keystone species: A species whose ecological effects are unusually large relative to its abundance. Salmon runs can influence many species and ecological processes across watersheds.
Columbia River salmon runs: The seasonal migrations of salmon and steelhead into the Columbia River basin. Dams and restoration efforts make this watershed a major case in run management.

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