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Missing chinook

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1.3K views 12 replies 10 participants last post by  bscappell  
#1 ·
Dam counts between Bonnieville and the Dalles dam there is 223,815 difference and fish passage numbers as of today and passage numbers continue to drop. Is it possible over 200,000 thousand fish are laying dead on the bottom above Bonnieville because of warm water conditions?
 
#2 ·
A sizeable number of fish crossing Bonneville are destined to stay between Bonneville and the Dalles. This includes spring creek hatchery tules and some bright and tule stock (hatchery and or wild) from other tributaries such as Little White Salmon and White Salmon and Klickitat.

In addition, some of the URBs pull into cold water refuges at Drano and Underwood and Klickitat until the river cools off a bit. Many of these die of hook poisoning.

And of course many fish die in tribal nets (much of this between The Dalles and McNary but also a lot below the Dalles. Total zone 6 tribal harvest is usually around 100,000 fish.
 
#7 ·
There are a number of reasons, but warm water has certainly been a big factor this summer. I've spent a lot of time on the Deschutes this month and have never seen the peak of fish (steelhead and chinook) enter the river so late. Read the link below the other day. The world is warming, the Pacific NW maybe more than most places.


As I write this, the Columbia River at TDA is averaging ~10% below median flow for the date and has been at least that far below median since April. Temp at TDA is 70.3 degrees with USGS no longer showing median temps on the site I watch. That bothers me.......