Helen Neville's posts

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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).”

Lahontan cutthroat a poster child for modeling extinction risk

Researchers work to gather data on Lahontan cutthroat trout. Jason Barnes/Trout Unlimited Determining the conservation needs of at-risk wildlife species is complicated business. Federal and state wildlife agencies—and their partners — need to assess the unique characteristics of different populations to understand the conservation needs of a given species. They typically ask questions like: “Which … Read more