Thornbury Fishway, Thornbury, Ontario, Canada Chinook Salmon passage and lingering at the fishway exit

Thornbury Fishway, Thornbury, Ontario, Canada A Chinook Salmon demonstrates typical behaviour in the fishway – ascend and then rest at the fishway exit

A skinny Chinook Salmon ascends while another drops back at the Thornbury fishway exit

Thornbury Fishway, Thornbury, Ontario, Canada Chinook Salmon lingering and dropping back at the fishway exit

Thornbury Fishway, Thornbury, Ontario, Canada A Chinook Salmon passes upstream and lingers at the fishway exit

Thornbury Fishway, Thornbury, Ontario, Canada Upstream passage and subsequent drop back of a Chinook Salmon beginning to develop a fungal infection on the fins

Thornbury Fishway, Thornbury, Ontario, Canada Several large Chinook Salmon pass and rest at the fishway exit

Thornbury Fishway, Thornbury, Ontario, Canada An exhausted Chinook Salmon passes upstream then drops back and fights the flow of the fishway.

Thornbury Fishway, Thornbury, Ontario, Canada Several Chinook Salmon linger and drop back over the fishway control gate

Thornbury Fishway, Thornbury, Ontario, Canada Several large Chinook Salmon ascend and drop back at the fishway exit