Posted on February 4, 2015 by Al B.
Good news and concerning news from some recent science.
Many salmon rivers around Puget Sound have experienced increasing fluctuations in flow over the past 60 years, just as climate change projections predict – and that’s unfortunate news for threatened Chinook salmon, according to a new analysis of salmon survival and river flow. More pronounced fluctuations in flow can scour away salmon eggs and exhaust young fish, especially when lower flows force adult fish to lay eggs in more exposed areas in the center of the channel. The new study published in the peer-reviewed journal Global Change Biology says such increased flow variability has the most negative effect on salmon populations of several climate factors considered. (Phys.org)
Filed under: Puget Sound | Tagged: chinook, climate change, global warming, rivers, Salmon | Leave a comment »
Posted on December 23, 2014 by Al B.
Whether or not this research is correct, the general trend does not look good for Chinook. On the Dungeness River, for example, even with 25 years of recovery work, they are not seeing Chinook return as expected. In Canada, the huge growth of Vancouver, the vast clear-cutting and mining going on in spawning streams coupled with a lack of any enforcement in protecting those streams and rivers seems to be a precursor to the kind of destruction of habitat as Western Washington witnessed a few decades ago.
New climate-change research involving a University of British Columbia scientist predicts that one of the West Coast’s most prized salmon stocks could be wiped out over the next 85 years. A study has concluded that there is a five per cent chance of a catastrophic loss of the chinook salmon by 2075, and a 98 per cent chance the population will suffer catastrophic losses by 2100, if climate change warms the water. An international research team looked at the ability by the chinook to adapt to warming water temperatures caused by climate change. (Canadian Press)
Filed under: Puget Sound | Tagged: chinook, Salmon | 1 Comment »
Posted on December 9, 2014 by Al B.
Forage fish are the backbone of a healthy Puget Sound. They provide the food base for endangered chinook which in turn are relied on by the endangered Southern Resident Orcas. Little Fish + Big Fish = Orca. Laura James produced this piece for Sound Action.
Forage Fish Matter http://vimeo.com/113797219
Filed under: Puget Sound | Tagged: chinook, forage fish | Leave a comment »
Posted on August 1, 2014 by Al B.
Posted on March 17, 2014 by Al B.
Good news at least from the forecast for these fish.
Under options approved this week, recreation anglers fishing off the Washington coast this year could see a higher catch quota for chinook salmon and certainly higher coho quotas. The three alternatives for ocean fishing, approved late Thursday by the Pacific Fishery Management Council, are in response to projections of a higher abundance of hatchery chinook and a significant increase in the number of coho bound for the Columbia River. The council establishes fishing seasons in ocean waters three to 200 miles off the Pacific coast. Chinook options range from 47,500 to 60,000 fish, while the coho options range from 159,600 to 193,200 fish. Jeffery Mayor reports. (Tacoma News Tribune)
Read the whole story at:
Filed under: Puget Sound | Tagged: chinook, coho, fishing, quotas, Salmon | Leave a comment »
Posted on November 18, 2013 by Al B.
A story to cheer up David Suzuki this morning (G).
The largest run of Chinook salmon in decades returned to the Elwha River this fall, according to officials with the Olympic National Park. Fish are streaming into stretches of the Elwha River and its tributaries that were formerly blocked by the Elwha Dam, park officials said Friday on its website. The Elwha Dam, one of two dams on the river, stood for nearly a century before it came down in 2012.
Read the whole story at
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Posted on October 7, 2013 by Al B.
A huge piece of Glines Canyon Dam was blasted away late Saturday as dam removal on the Elwha River resumed. Explosive charges set by demolition crews removed almost the entire eastern third of the remaining 60 feet of concrete dam, webcam photos show. But water did not immediately flow through the new gap because of tons of sediment behind the dam as well as rubble from the explosion that created temporary blockage between the current river channel and the new hole. With a section of the former 210-foot dam removed nearly to the original riverbed, workers will clear a passable fish channel on the floor of the river canyon before stopping work in November for the next fish window, according to Brian Krohmer, dam removal project manager.
Arwyn Rice reports. Glines Canyon Dam doesn’t look much like a dam anymore http://peninsuladailynews.com/article/20131007/NEWS/310079998/glines-canyon-dam-doesnt-look-much-like-a-dam-anymore
See also: Chinook salmon returning to dam-less Elwha River http://peninsuladailynews.com/article/20131007/news/310079992/0/SEARCH/chinook-salmon-returning-to-dam-less-elwha-river
Filed under: Puget Sound | Tagged: chinook, elwha dam, elwha river, glines canyon dam, Salmon | Leave a comment »