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Up Just One Creek

A rare Colorado trout may be even more elusive than previously thought, reports The New York Times' Green blog. The greenback cutthroat trout, which is the state fish of Colorado, was thought to live in five wild populations, but a recent study of current fish populations, preserved samples, and historical stocking records indicates that there is only one wild population of the trout, the Times says. The study, published in Molecular Ecology, examined DNA samples from museum greenback cutthroat trout specimens and performed a phylogenetic analysis of the historical samples, which they then compared to modern lineages. The researchers say that the surviving population, which is outside the fish's historical range, is likely descended from fish stocked by a hotel owner to encourage visitors, the Times adds. The other populations are of trout from "phylogenetically and geographically distinct sources," the researchers write.

The Scan

Booster Push

New data shows a decline in SARS-CoV-2 vaccine efficacy over time, which the New York Times says Pfizer is using to argue its case for a booster, even as the lower efficacy remains high.

With Help from Mr. Fluffington, PurrhD

Cats could make good study animals for genetic research, the University of Missouri's Leslie Lyons tells the Atlantic.

Man Charged With Threatening to Harm Fauci, Collins

The Hill reports that Thomas Patrick Connally, Jr., was charged with making threats against federal officials.

Nature Papers Present Approach to Find Natural Products, Method to ID Cancer Driver Mutations, More

In Nature this week: combination of cryogenic electron microscopy with genome mining helps uncover natural products, driver mutations in cancer, and more.