Managing Lake Pend Oreille Fisheries: 240,000 Non-Native Lake Trout Removed Since 2006, Walleye Now Targeted
April 9th, 2021
On the heels of a successful and significant reduction of lake trout in Lake Pend Oreille, Idaho is now using some of the same methods – gillnetting and an angler rewards program – it used to fight lake trout in a new effort to reduce the population of invasive walleye in the lake.
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Why Are Alaska’s Returning Chinook Salmon Getting Smaller, Younger? Study Suggest Marine Predators Target Bigger Fish
April 9th, 2021
Older Chinook salmon may die in the ocean more often than previously thought, according to a life cycle simulation created by Alaska researchers.
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2020 Draft Pinniped Predation Report: Steller Sea Lions At Bonneville Dam Taking Big Whack Out Of Steelhead, Sturgeon
April 2nd, 2021
During the fall 2019 and spring 2020 monitoring seasons at Bonneville Dam, sea lions continued to prey on salmon, steelhead and sturgeon, but the proportion of California sea lions is continuing to drop while that of steller sea lions continues to rise, according to a draft annual pinniped report by the U.S. Army Corps of Engineers.
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Study Shows Avian Predation On Salmon Smolts In Columbia River Plume Higher With Turbidity, Smaller Plume, Fewer Forage Fish
March 26th, 2021
Juvenile salmon run the gamut of predators – birds, other fish and pinnipeds – as they migrate from their rearing grounds far upstream in the Columbia River basin all the way to the ocean, but they also are confronted with predators as they enter the ocean.
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Precautionary Tale On Eradicating Invasive Species: ‘Don’t Try To Get Them All, Or Could Come Back To Bite You’
March 18th, 2021
Some invasive species targeted for total eradication bounce back with a vengeance, especially in aquatic systems, finds a study led by the University of California, Davis.
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UBC Study Shows Blue Herons As Significant Source Of Juvenile Salmon Predation; Taking Out Fish Destined To Die Somewhere Else?
March 11th, 2021
Pacific great blue herons could be scooping up as many as three percent of all juvenile salmon in the Salish Sea region and as many as six percent in some years with low water flow, according to a new University of British Columbia study.
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Despite Covid-19 Challenges, BPA Says Pikeminnow Reward Program Met Removal Goals, Though Harvest 70,000 Fish Below Average
January 15th, 2021
The Bonneville Power Administration reports that in 2020, for the 23rd consecutive season, the Northern Pikeminnow Sport Reward Program met its annual goal to remove 10% to 20% of pikeminnow, 9 inches or longer, in the Columbia and Snake rivers that prey on juvenile salmon and steelhead. Due to Covid-19, however, catch numbers were far below average.
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Idaho’s ‘Salmon Workgroup’ Submits Policy Recommendations To Governor; No Consensus On Dam-Breaching
January 8th, 2021
The state of Idaho’s “Salmon Workgroup” last week released a final report that includes policy recommendations for Gov. Brad Little to consider that aim “to restore abundant, sustainable, and well distributed populations of salmon and steelhead in Idaho for present and future generations, while recognizing diverse interests throughout the State.”
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USFWS Issues Final Rule Expanding Ability For States,Tribes To Lethally Take Cormorants Feasting On Fish
December 30th, 2020
The U.S. Fish and Wildlife Service has issued the final rule and final environmental impact statement to “responsibly manage conflicts associated with double-crested cormorants” in the United States.