Study: Salmon Virus Originating From Atlantic Salmon Farms Continually Infecting Wild Juvenile Chinook Salmon In BC Waters

May 27th, 2021

Piscine orthoreovirus (PRV) – which is associated with kidney and liver damage in Chinook salmon – is continually being transmitted between open-net salmon farms and wild juvenile Chinook salmon in British Columbia waters, according to a new genomics analysis published this week in Science Advances.

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Streamflows And Salmon Survival: Study Shows How Managed Pulse Flows In Dammed River Substantially Increases Survival

May 20th, 2021

Juvenile salmon migrating to the sea in the Sacramento River face a gauntlet of hazards in an environment drastically modified by humans, especially with respect to historical patterns of stream flow. Many studies have shown that survival rates of juvenile salmon improve as the amount of water flowing downstream increases, but "more is better" is not a useful guideline for agencies managing competing demands for the available water.

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The Competing Trade-Offs Of Mixed-Stock Fisheries: Can Fisheries Benefit From Such Biodiversity Without Harming Weak Populations?

May 13th, 2021

A new study by researchers from Simon Fraser University and Canada’s Department of Fisheries and Oceans reveals the trade-offs of fish biodiversity--its costs and benefits to mixed-stock fisheries--and points to a potential way to harness the benefits while avoiding costs to fishery performance.

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Climate Change

Expect The Wildfires To Get Worse: Urban Areas Will See Degrading Air Quality

May 6th, 2021

From the Pacific Northwest to the Rocky Mountains, summers in the West are marked by wildfires and smoke. New research from the University of Utah ties the worsening trend of extreme poor air quality events in Western regions to wildfire activity, with growing trends of smoke impacting air quality clear into September.

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Independent Science Panel Reviews Conflicting Studies On Impacts Of Columbia/Snake Dam Bypass Systems On Juvenile Salmonids, Smolt-To-Adult Returns

April 23rd, 2021

The bypass systems at Columbia/Snake dams for juvenile salmon and steelhead are mostly attracting the smaller fish, which return as adults in lower numbers than larger fish. Is it the size of the fish impacting survival, or “delayed mortality” from dam passage?

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