Pinks?

[WSU]

  the skagit has huge spikes in cfs.

[7mmfan]

The Skagit can get very big, but the stretch of water between Rockport and the dam at Newhalem  is way less susceptible to flooding than the lower river. It also happens to be where the bulk of all spawning happens. I find it hard to believe the floods wiped those fish out up there. I hope I'm  Wrong though in in four more years we have stellar runs again.

[Bullkllr]

the skagit has huge spikes in cfs.

And between Oct 2015 and Feb 2016 there were 6/7 different huge spikes. Don't know how to post the pic, but here is a link to the graph during that time period at Marblemount.

https://nwis.waterdata.usgs.gov/wa/nwis/uv?cb_00060=on&cb_00065=on&format=gif_default&site_no=12181000&period=&begin_date=2015-10-01&end_date=2016-02-28

High water periods (that have been exacerbated by development and other human land uses) are pretty well known to be very detrimental to successful salmon spawning production.

[jmscon]

Stumbled across this paper a while back. Doesn’t pertain to pinks but to chinooks and could easily impact all salmon and steelhead.

https://www.nature.com/articles/s41598-017-14984-8

The percentage of the total coastwide smolt production consumed by harbor seals increased from 1.5% (3.5 million consumed out of 236.8 million estimated total production) in 1975 to 6.5% (27.4 million consumed out of 423.4 million estimated total production) in 2015. Harbor seals in the Salish Sea (i.e. Puget Sound, Strait of Georgia, and Strait of San Juan de Fuca) accounted for 86.4% of the total coast wide smolt consumption in 2015, due to large increases in the harbor seal abundance in this region between 1975 and 2015 (8,600 to 77,800), as well as a large diet fraction of Chinook salmon smolts relative to other regions (see supplemental material).

Figure four in results shows the amount caught by fisheries in the Salish sea has dropped to almost nothing while pinniped consumption has skyrocketed.

[Gobble Doc]

I thought I remember something about trading chum retentions for chinook which affected the skagit chum returns. I can’t find anything in writing about it. I thought this was 5-10 yrs ago. Does anyone else remember anything about this?


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[jmscon]

I have also been hearing about chums in the upper Yukon dying off big time because of high water temps.