Feisty eastern brook trout outcompeted cutthroat, voracious European brown trout preyed on young native fish, and rainbow trout likely originating from California bred with cutthroat to produce hybrid “cutbows.” And, decades later, one or several anonymous anglers illegally released lake trout into Yellowstone Lake - an event that rippled through the park nearly as dramatically as the reintroduction of wolves. Between the 1880s and the 1950s, Yellowstone’s managers, determined to turn America’s first national park into a fisherman’s paradise, planted 300 million trout in its waters - millions of them members of nonnative species - with ruinous consequences. camera icon NPSĮven within Yellowstone, however, cutthroat are beleaguered, due partly to the Park Service’s own historic actions. Recreational fishing has a long history in Yellowstone.
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