What's the story with other rivers? - Spey Pages
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post #1 of 4 (permalink) Old 07-01-2019, 07:12 PM Thread Starter
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Question What's the story with other rivers?

Specifically the Deschutes, I know it flows into the Columbia. But, is the Columbia problem(s) far enough upstream from the mouth of the Deschutes to ease the pain? I'm planning on a Fall trip to the NW and I'd like to target the areas where there is at least a reasonable chance of hooking up.

While I'm at it, for my fellow Great Lakers, what are our runs looking like?

Gene
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post #2 of 4 (permalink) Old 07-02-2019, 09:15 AM
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The fish that reach the Deschutes have to go through the Columbia and over the Bonneville, I believe...
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post #3 of 4 (permalink) Old 07-02-2019, 12:07 PM
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A string of poor ocean survival years is causing low returns of Chinook salmon and steelhead. Also poor sockeye return. A decent coho salmon return is forecast, and fishing in the nearshore ocean waters suggests that the coho fishery will be good this year.

Imagine how bad it would be if dam passage survival were at historic lows at the same time as ocean survival is this bad. Populations might not be able to sustain themselves.

It remains unknown whether this period of low ocean survival is cyclic and temporary or if it is the new permanent condition.
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post #4 of 4 (permalink) Old 07-02-2019, 12:30 PM
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Quote:
Originally Posted by glcaddis View Post
Specifically the Deschutes, I know it flows into the Columbia. But, is the Columbia problem(s) far enough upstream from the mouth of the Deschutes to ease the pain? ........
Two decades ago when Fisheries and Oceans Canada appeared to be on the verge of losing control over management of Pacific salmon fisheries thanks to the doomed but scary Neskonolith coho court challenge, FOC scientists and others were opining in the event of low marine survival conditions, that interior Pacific salmon runs a long ways from the ocean were more susceptible than salmon populations close to the ocean.

That hypothesis should translate in more volatile abundance for interior-bound salmon and less volatility for coastal populations. I never looked at the numbers to verify that relationship.

The other 'empirical regularity'/stylized fact that salmon ecologists have offered over the years is the notion that abundance in Alaska and abundance to the south are negatively correlated. Roughly. So if returns look poor in Oregon, they are likely good in Alaska.
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Science is not common sense. Much of it is devoted to a systematic documentation of what we do not know and understand.
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