-
Barging increases likelihood of hatchery fish straying into wild steelhead populations
"To repeat the obvious, that means in 2006 an estimated 42 percent of the spawners in this “wild” population were hatchery fish. Statistical modeling indicated the number of steelhead smolts barged in the Snake River in the previous several years was a strong predictor of PHOS (Percent Hatchery Origin Spawners)."
There may be no more amazing feat in nature than migrations undertaken by salmon as they complete an epic journey from freshwater to the ocean and back upstream to their birthplace to spawn. In some cases, salmon swim more than 1,000 miles upstream to spawning waters. In this final freshwater phase of their trip, adults follow…
-
Take the TU climate change survey
Take TU's climate change survey and help us direct our future work in this important arena.
Anglers and conservationists across America, regardless of their affiliation with Trout Unlimited, are invited to participate in TU's new climate change survey. The purpose of the survey, crafted by TU's National Leadership Council workgroup on climate change awareness, is to gather information from America's anglers and conservationists that might help TU better direct its efforts…
-
New study links human influence to recent megadrought
Apache and Gila trout face vast new challenges thanks to landscape alterations What do two 19-year intervals separated by four centuries have in common, and what do the similarities mean for native trout? A recent study reconstructed climate for Southwestern North America, including California, Nevada, Arizona and New Mexico, and found the years 1575-1593 and…
-
TU trout population estimation model used for humans
It’s safe to say no one thought the model created for trout would end up estimating human populations in remote areas of Africa.
Scientists often use models created by others to do conservation work, but sometimes they create new methods to obtain specific information for their needs. Trout Unlimited scientists recently collaborated with a group of outside scientists to estimate abundances for trout populations across the entire range of a threatened Lahontan cutthroat. It’s safe to say no…
-
TU lead scientist recognized by American Fisheries Society
By Dan Dauwalter Helen Neville is a juggernaut in native trout conservation, science and life Dr. Helen Neville, Trout Unlimited’s senior scientist, was recognized this week by the Western Division of the American Fisheries Society (AFS) with the Award of Merit. The award is given to AFS members who have made positive and regionally significant contributions to…
-
New TU film on Elwha River wild steelhead recovery premieres April 17
Bases-loaded home runs are few and far between in the river restoration game. But for summer run steelhead, those mysterious and long-distance traveling cousins to winter run O. mykiss, that’s what happened when two dams on Washington’s Elwha River were removed over the past decade. While the rebound of salmon and winter run steelhead in…
-
Science panel excited about numbers on Yellowstone Lake
By Dave Sweet “Victory on Yellowstone Lake is within our grasp!” Those words came from Dr. Michael Hansen during the Science Review Panel meetings held last week on the Yellowstone Cutthroat Recovery in Yellowstone Lake project. Hansen is the recently retired supervisory research fisheries biologist for the Great Lakes Science Center of the United States…
Category