One mature lake trout can eat approximately 41 native cutthroat trout per year. More specifically, how many native Yellowstone cutthroat trout are eaten by brown trout. Some populations that have been affected by hybridization show little or no phenotypic signs of hybridization (Behnke 1992). 0 0 1 0 0 0 0. Where to Find Bear River Cutthroat in Utah. I have seen a mouse swimming across the Henry’s Fork River. He was a lucky little mouse. This population now inhabits 25 miles of stream … What do cutthroat trout eat? But they do eat. They threaten the survival not only of the cutthroat but also the many species that depend on the native trout, including grizzly bears, osprey, otters and bald eagles. There are a couple of reasons for this. Yellowstone cutthroat trout have experienced declines across their historic range; specifically, only 9% of the Bighorn Mountains historic range is currently occupied. Todd Koel, fisheries supervisor in Yellowstone, was recently awarded the 2015 Regional Director’s Award for Natural Resource Management by the National Park Service (NPS). Most predators can’t catch lake trout as a substitute food source, because these trout live in deep water and are quite large. Top Answer. He made it to shore. Wiki User Answered . 9. The cutthroat trout stocked in Kentucky were surplus Yellowstone strain cutthroat trout, spawned and raised up to stocking size at the Norfork National Fish Hatchery in Arkansas. A panel of fisheries experts that met in 1995 to assess the lake trout's presence and likely impacts on Yellowstone cutthroat population estimated that, with effective suppression of lake trout numbers, the cutthroat population decline might be held to 10- to 20 percent of present levels. It is actually best if you can release then without netting them but often times this is not possible. With its prime fishing conditions and beautiful scenery, Yellowstone Lake makes a … In general, Yellowstone Cutthroat Trout are larger than Westslope Cutthroat Trout and more prone to eat fish as part of their diet. What do grizzly bears in Yellowstone National Park eat? And not only the big browns. Are trout cannibals? Lake trout grow much larger than cutthroat and an adult lake trout can eat about 41 cutthroat trout each year, about 80% of their diet. The Cutthroat Restaurant & Bar. Yellowstone Cutthroat Trout are used extensively for mountain lake stocking on the east slope of the Rocky Mountains and in the Absaroka-Beartooth Wilderness where they can grow to sizes up to 15 pounds. The lake is home to native Cutthroat Trout and non-native Lake Trout. In the picture is a cutthroat trout that was caught in Yellowstone National Park. Non-native lake trout could decimate the native cutthroat trout population and then, due to their cold-blooded nature, persist at high numbers on other foods preventing their preferred prey (cutthroat trout) from recovering. Young lake trout will also eat the same food that adult cutthroat trout eat. They’re fall spawners. This requires lots of effort by the angler just to reach the Cutthroat Trout, because they are often found in very remote areas. Native cutthroat trout are the park’s most ecologically important fish and the most highly regarded by visiting anglers. While they are rebounding to some degree due to extensive lake trout eradication efforts, the population will never be what it once was. While Cutthroat Trout are still found in good numbers in many of the rivers in Montana (such as the Yellowstone), the best Cutthroat Trout fishing will usually now be found deep in the backcountry - in isolated mountain lakes and streams. 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