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Science | Page 22

  • Community Conservation Featured Science

    Trout Unlimited activates ‘tree army’ in Michigan

    By Jamie Vaughan With planting bags slung over their shoulders, gloves and a specialized tree planting tool called a "hoedad" in hand, the Rogue River Tree Army descended toward the river. In just three weeks, 16,000 newly planted trees took root in their new home, providing immediate benefits to the Rogue River watershed that will only increase with time.  This large-scale tree planting initiative was conceived by Trout Unlimited in 2017 and came to fruition this spring thanks…

  • Science Conservation Featured steelhead

    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…

  • Community Conservation Featured Featured Science

    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…

  • Science Featured

    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…