Bobby IrelandLorenzo Ciannelli

Patterns in the Marine Distribution of Oregon Patterns in the Marine Distribution of Oregon Chinook Salmon (Chinook Salmon (Oncorhynchus tshawytschaOncorhynchus tshawytscha) )

• Do Chinook spatially aggregate by discreet population units?

• What factors influence their distribution?

2006 Nearest Neighbor Distribution

Sept 17-19 Sept 24-26

September 2006 Catch and stock composition

Chinook catch and satellite SSTs in 2006

Sept 17-19 Sept 24-26

Upwelling Index

September 2006

Satellite SST

Distribution by latitude

Summary

Population units of Chinook salmon differ in their distribution along the Oregon Coast depending on their river of Origin

Evidence for aggregation on smaller spatial scales is inconclusive

Chinook can respond quickly to short duration temporal changes in ocean conditions

Weekly catch by Age