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This shapefile is the official boundary of the Western Native Trout Initiative. The boundary was originally developed by the United States Fish and Wildlife Service and was updated in 2013 to reflect revisions from the Western Native Trout Initiative, a recognized Fish Habitat Partnership (FHP) of the National Fish Habitat Partnership.
The Western Native Trout Initiative is all about getting projects done that will help improve the abundance of western native trout across a variety of landscapes. WNTI a collaborative effort of 12 western states including Alaska, the National Fish Habitat Action Plan, the U.S. Fish and Wildlife Service, Forest Service, Bureau of Land Management, and many tribal and public or private conservation-minded organizations (view partners). WNTI's goals and objectives include gathering project opportunities, funding, and partners together to make a measurable impact on native trout populations and habitats. WNTI projects are and will be funded by many different entities and partners.
Fishes of the Upper Colorado River Basin have one of the highest levels of endemism in the United States. The range and abundance of these fish has declined over the last century and continues to decline as a result of legacy impacts from past management practices, current water management, interactions with non-natives, and other impacts. Seven of these fish are considered imperiled by the American Fisheries Society and four are listed as endangered by the U.S. Fish and Wildlife Service. We applied a complementarity-based approach to develop priority ranks (0 – 1; low to high) for catchments in the Upper Colorado River Basin. We used methods and a framework that we had previously developed for the Lower Colorado...
The historic range of California golden trout (CGT) includes two watersheds draining the Kern Plateau of the southern Sierra Nevada Mountain Range in California. CGT are native to Golden Trout Creek (GTC) and the South Fork of the Kern River (SFKR), an area encompassing approximately 593 square miles (1,536 sq. km). They historically occupied GTC from the headwaters, with the possible exception of the upper reaches of some tributary streams and headwater lakes, downstream to a series of waterfalls near the mouth. In the SFKR, CGT were present from the headwaters downstream at least to the southern end of the present-day Dome Land Wilderness (Figure 1) and perhaps downstream of Lake Isabella. They may also be found...
Historically, Rio Grande Cutthroat Trout occupied all cool waters in the Rio Grande drainage, including the Chama, Jemez and Rio San Jose drainages, along with suitable waters of the Pecos and Canadian drainages. They currently live in only about 100 headwater streams, occupying 10 percent of their former range. They have a yellowish green-gray to gray body with scattered black spots, and a densely spotted tail. Adults grow up to 12-13 inches long. The Rio Grande Cutthroat has officially been designated as the New Mexico State Fish.
Greenbacks are native to the Arkansas and South Platte River basins in Colorado's Front Range mountains, and a few South Platte tributaries in extreme southeastern Wyoming. It was listed as endangered in 1973 but downlisted to threatened when a recovery plan began in 1978. The Greenback Cutthroat Trout's maximum size is 18 inches, and it has the largest spots of all cutthroats. Despite its name, the Greenback Cutthroat's back is not particularly green.
The distribution of Coastal Cutthroat Trout (CCT) is broader than that of any other cutthroat trout sub-species. It extends along the Pacific coast of North America from the Eel River in northern California, to the Prince William Sound area of Alaska, extending to Gore Point on the Kenai Peninsula. The eastern range of the subspecies rarely extends farther inland than 160 km and usually is less than 100 km. The eastern range is generally bounded by the Cascade Mountain Range in California, Oregon, and Washington, and by the Coast Range in British Columbia and southeastern Alaska. In the Columbia Drainage CCT extend eastward to river km 309, almost to he mouth of the Deschutes River. This range coincides closely...
Arctic grayling are found throughout mainland Alaska and some islands such as St. Lawrence and Nunivak. The full extent of their native range Alaska, and coastal areas of South Central and Southeast Alaska is not well documented.
Arctic char have been documented in lakes and outlet streams in the Brooks Range, the Kigluaik Mountains, the Kuskokwim Mountains, the Alaska Peninsula, Kenai Peninsula, Kodiak Island, and in a small area of Interior Alaska near Denali National Park and Preserve. However, a comprehensive survey of Alaska water bodies that contain Arctic char is lacking. The vast majority of lakes and rivers where they have been surveyed and found are within Federal lands such as the National Petroleum Reserve-Alaska, Arctic National Wildlife Refuge, Gates of the Arctic National Park, Noatak National Preserve, Togiak National Wildlife Refuge, and others. Most populations of Arctic char are well off the road system. Throughout most...
The Lahontan Cutthroat Trout is the largest cutthroat trout species, and is the state fish of Nevada. The present distribution is restricted to a few lakes and streams within and outside the historic range. Dark olive backs and reddish to yellowish sides frequently characterize the Lahontans found in streams, while the sides of lake-dwelling Lahontans are often silvery. The largest recorded Lahontan trout weighed in at 41 pounds.
The current distribution of bull trout populations in the lower 48 states outside of SE Alaska and Canada is highly fragmented, occupying only portions of the historically occupied watersheds. In non‐coastal areas, they typically remain only in the coldest tributaries. Like most native salmonids in the west, bull trout distribution, abundance, and habitat quality have declined range‐wide. For example, in Idaho, Nevada and Montana, about one‐third of the currently occupied habitat supports populations at or near habitat capacity, while two-thirds support populations significantly below potential.
The Paiute Cutthroat Trout is native only to Silver King Creek, a tributary of the Carson River in the Sierra Nevada Mountains in California. It is believed that the Paiute evolved from a sub-population of Lahontan Cutthroat Trout that became isolated in the creek. Pauites have a purple coloration, and they are distinguished from other cutthroat species because they lack most body spots. They grow to a maximum size of 10 inches and weigh up to 1 pound. The Paiute Cutthroat Trout is a federally listed threatened species. The only populations of Paiute Cutthroat Trout in the Silver King Creek basin now exist upstream of their native range, isolated from non-native trout by barrier waterfalls. Chemical treatments using...
Dolly Varden are the most widely-distributed salmonid in Alaska and occupy most coastal waters in the state. Two forms or sub-species of Dolly Varden have been described in Alaska. The northern (S. m. malma) form is distributed from the Mackenzie River to the north side of the Alaska Peninsula while the southern form (S. m. lordi) is distributed on the south side of the Alaska Peninsula to the southern tip of Southeast Alaska, including Kodiak and the Aleutian Islands. The distribution of each form has changed in recent years with knowledge gained from genetic analysis. Both forms have anadromous and stream-resident forms but the lacustrine (lake dwelling) form is rare in the northern form but common in the southern...
The Bonneville Cutthroat Trout was historically found in the Bonneville Basin, including suitable habitat within the basin portions of Utah, Idaho, Wyoming and Nevada. Although scientists believed that pure strains of Bonneville Cutthroat were extinct 30 years ago, small populations have been found in nearly 70,000 acres of lakes and 850 miles of streams. The Bonneville Cutthroat's coloration is less vivid than other cutthroat species, and it has large, evenly distributed spots.
Conservation rank data for each drainage catchments in the Upper Colorado River Basin. Some smaller catchments were not ranked. Catchments are the drainage area (local watersheds) for each individual stream segment within the 1:100,000 scale National Hydrography Plus Version 1 (NHDPlusV1) dataset. The NHDplus catchments have been ranked (valued) based on the representation of native fish species given the threats to their persistence (i.e., non-native fish species, land use, and habitat fragmentation). The ranking process placed importance on areas with several native species as well as areas important to individual species with restricted distributions and so is not simply a species “hot spot” assessment. Catchments...
A storymap that allows users to learn about the Western Native Trout Initiative and explore stories of five native trout and their triumphs of restoration, collaboration, conservation, education, and protection.
The Little Kern Golden Trout is a brightly colored fish with several spots on the back and tail. The belly and cheeks are bright red to red-orange, the lower sides are bright gold, the lateral band is red-orange, and the back is deep olive green. The Little Kern Golden Trout is native to the Little Kern River and the accessible reaches of its major tributaries in Tulare County, California. Little Kern Golden Trout average between 6 and 7 inches long.
Alaskan Lake Trout range widely in Alaska from north to south but are not found in the Yukon-Kuskokwim lowlands or the coastal drainages of Southeast Alaska. Lake trout inhabit the deeper lowland lakes along the central Arctic coastal plain, as well as waters in the Brooks Range and Alaska Range. Lake trout inhabit clear, mountain lakes in northern Alaska as well as turbid glacial lakes on the north side of the Chugach Range and on the Kenai Peninsula.
The historical range of the Yellowstone Cutthroat Trout was upstream of Shoshone Falls on the Snake River and tributaries. It also existed across the Continental Divide in Yellowstone Lake and in the Yellowstone River, and its tributaries downstream to the Tongue. Yellowstone Cutthroat can be distinguished from other cutthroat trout by their larger black spots, clustered toward the tail, and by their gray, gold, and copper hues. The Yellowstone Cutthroat measures from 6 to 20 inches long when it reaches maturity.
This conservation assessment of the U.S. Rio Grande Watershed identifies target areas for the implementation of habitat-related projects and priority areas, stream segments, and watersheds to improve ecological condition, restore natural processes, and prevent the decline of intact and healthy systems. Through systematic conservation planning, this assessment addresses multi-species and multi-jurisdictional concerns; work that complements and extends analogous conservation assessments completed for much of the Desert Landscape Conservation Cooperative’s (DLCC) extent. In doing so, it provides a flexible working model into which priority taxa and habitats can be easily incorporated in the future.