Study Analyzes Non-Native Warmwater Fish Consumption Of Juvenile Salmon In Reservoirs; Walleye Predation Much Higher Than Native Pikeminnow

September 23rd, 2021

When warmwater fish species like bass, walleye and crappie that are not native to the Pacific Northwest, but prized by some anglers, overlap with baby spring chinook salmon in reservoirs in Oregon’s Willamette River they consume more baby salmon than native predatory fish per individual, new research found.

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NMFS Denies Petitions To List Coastal Spring Chinook As Separate ‘Evolutionary Significant Unit’ From Fall Chinook

August 19th, 2021

The National Marine Fisheries Service denied two petitions this week that, if they had been approved, would have separated spring chinook from the fall chinook evolutionary significant unit along two areas of the Oregon and California coast. The petitions also asked for spring chinook, once separated from its fall chinook ESU, to be listed separately as a threatened or endangered species under the federal Endangered Species Act.

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IPPC Report Says Climate Change Widespread, Rapid, Intensifying: For PNW More Marine Heatwaves, Droughts, Fires; Less Snowpack, Declining Glaciers

August 12th, 2021

Marine heatwaves in the Pacific Ocean will increase in both intensity and duration as will ocean acidification along the Pacific Northwest coast, says the latest report from the Intergovernmental Panel on Climate Change released this week.

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EPA Issues Salish Sea Health Report With 10 Indicators; Chinook (Declining), Killer Whales (Declining), Water Quality (Declining)

August 5th, 2021

The U.S. Environmental Protection Agency and Environment and Climate Change Canada have released their joint “The Health of the Salish Sea Report” analyzing 10 indicators of the health of the Salish Sea, the shared estuary that includes the Strait of Juan De Fuca, Puget Sound, and Georgia Basin.

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Lower Willamette River Contaminants Impact Growth Rates, Threaten Population Abundance Of ESA-Listed Wild Spring Chinook

July 22nd, 2021

The suite of contaminants found in the lower Willamette River’s Portland Harbor is impacting growth rates – resulting in smaller fish – and population viability of the threatened upper Willamette wild subyearling spring chinook salmon that rear there. That could mean the smaller fish would be more susceptible to avian predation and less successful at finding their own prey when they reach the lower Columbia River estuary, says a new study.

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Funded By Pacific Lamprey Conservation Initiative, Biologists Use E-DNA To Track Presence Of Lamprey In Deschutes River Basin

July 22nd, 2021

Pacific lamprey have lived in the Deschutes River basin for millennia and native peoples in the area have counted on the lamprey for thousands of years for their nutrient rich meat. The fish have a tribal significance in their teachings, in their stories and in their ceremonies, says Lyman Jim of the Confederated Tribes of the Warm Springs.

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