A tiny juvenile Chinook salmon in a viewfinder in the Lower Fraser River.

Chinook salmon exhibit long-term rearing and early marine growth in the Fraser River, B.C., a large urban estuary

Using tiny salmon ear bones, or otoliths, Raincoast researchers and partners were able to demonstrate that Chinook salmon from Harrison River rely on the Fraser estuary for one to two months while they feed and grow. These findings underscore the critical nature of this habitat for the persistence and recovery of Chinook salmon…