 Chinook Salmon (Oncorhynchus tshawytscha)
Distribution of chinook salmon in San
Francisco Bay
Chinook Salmon are found from Northern Alaska to Central California on the
North American coast and from Northern Japan to the Bering Sea on the east coast of
Asia. The spawning populations in the Sacramento-San Joaquin Rivers are the
southernmost range af the species, and the Sacramento River and its tributaries is
the only system in the world which supports four separate races (runs) of chinook
which use the system for spawning year round. These are the fall, late-fall, winter
and spring runs. The San Joaquin River and its tributaries support a fall run of
chinook salmon.
In 1989, the National Marine Fisheries Service listed winter run chinook salmon as threatened and as endangered in 1991.
The Young Salmon Monitoring Program has the responsibility for gathering data on chinook salmon in San Francisco Bay/Estuary.
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