Author: John D. VarleyPublisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 7
Book Description
The Status, Ecology and Management of the Yellowstone and Snake River Finespotted Cutthroat Trout
Author: John D. VarleyPublisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 7
Book Description
Ecology, Status, and Management of the Yellowstone Cutthroat Trout
Author: John D. VarleyPublisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 12
Book Description
Habitat Segregation of Cutthroat Trout Phenotypes in the Upper Snake River, Yellowstone National Park
Author: Audrey SquiresPublisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 29
Book Description
The Snake River fine-spotted cutthroat trout (SRC) diverged 10,000-20,000 years ago from the Yellowstone cutthroat trout (YSC). The two exhibit distinct morphological differences based mainly in their unique spotting patterns. Most previous research of the SRC has been related to its value as a fishery species. This research fills a hole in the literature by investigating ecological preferences of the SRC, specifically with respect to habitat, and as compared to the USC. Results suggest that the SRC prefers streams with high discharge. The SRC was found only in the main stem of the Snake River and did not enter tributaries within the study area. Thisis likely due to a combination of the following: (1) the SRC exhibits a genetic preference for faster, larger streams; (2) the SRC has not entered the tributaries because of steeper gradients; )3) the tributaries are too far from the main range of the SRC (Palisades Reservoir to Jackson Lake); (4) the tributaries within the study area are much higher in elevation than the streams within the main range of the SRC. This analysis of the ecological differences between the YSC and the SRC is important to confidently identify the SRC as a distinct subspecies, as it is currently considered undescribed. Moreover, an understanding of habitat preferences will aid conservation and management efforts of key habitat types and hopefully lead to further protection of the cutthroat trout.
Conservation Assessment for Inland Cutthroat Trout
Author: Donald A. DuffPublisher: DIANE Publishing
ISBN: 0788145673
Category :
Languages : en
Pages : 199
Book Description
This document focuses on the current status, distribution and range for five subspecies of cutthroat trout Oncorhynchus clarki, which are found largely on national forest system lands and ecosystems in the Rocky Mountain and Intermountain West within the U.S. from the Canadian to the Mexican border. The 5 subspecies -- Westslope, Yellowstone, Bonneville, Rio Grande, and Colorado River cutthroat trout -- are designated either species of special concern or sensitive. These subspecies are presently restricted to a fragment of their former range. Includes assessment methods, and origins and taxonomic theory. Illustrated.
Yellowstone Fishes
Author: John D. VarleyPublisher: Stackpole Books
ISBN: 9780811727778
Category : Nature
Languages : en
Pages : 170
Book Description
This richly illustrated and thoroughly researched reference covers all the species of fish and every aspect of their existence in one of the most famous sport fisheries in the world. This edition includes new material on the impact of forest fires and the introduction of non-native species; an expanded chapter on angling; and an assessment of recent management policies. Full color plates and historic b&w photos.
Cutthroat
Author: Pat TrotterPublisher: Univ of California Press
ISBN: 9780520254589
Category : Nature
Languages : en
Pages : 572
Book Description
Cutthroat tells the full story of the genuine native trout of the American West. This new edition, thoroughly revised and updated after 20 years, synthesizes what is currently known about one of our most interesting and colorful fishes, includes much new information on its biology and ecology, asks how it has fared in the last century, and looks toward its future. In a passionate and accessibly written narrative, Patrick Trotter, fly fisher, environmental advocate, and science consultant, details the evolution, natural history, and conservation of each of the cutthroat's races and incorporates more personal reflections on the ecology and environmental history of the West's river ecosystems. The bibliography now includes what may be the most comprehensive and complete set of references available anywhere on the cutthroat trout. Written for anglers, nature lovers, environmentalists, and students, and featuring vibrant original illustrations by Joseph Tomelleri, this is an essential reference for anyone who wants to learn more about this remarkable, beautiful, and fragile western native.
Biology, Status, and Management of Yellowstone Cutthroat Trout
Author: Robert E. GresswellPublisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 31
Book Description
Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri were historically distributed in the Yellowstone River drainage (Montana and Wyoming) and the Snake River drainage (Wyoming, Idaho, Utah, Nevada, and probably Washington). Individual populations evolved distinct life history characteristics in response to the diverse environments in which they were isolated after the last glaciation. Anthropogenic activities have resulted in a substantial decline (42% of the historical range is currently occupied; 28% is occupied by core [genetically unaltered] populations), but the number of extant populations, especially in headwater streams, has precluded listing of this taxon under the Endangered Species Act. Primary threats to persistence of Yellowstone cutthroat trout include (1) invasive species, resulting in hybridization, predation, disease, and interspecific competition; (2) habitat degradation from human activities such as agricultural practices, water diversions, grazing, dam construction, mineral extraction, grazing, timber harvest, and road construction; and (3) climate change, including an escalating risk of drought, wildfire, winter flooding, and rising temperatures. Extirpation of individual populations or assemblages has led to increasing isolation and fragmentation of remaining groups, which in turn raises susceptibility to the demographic influences of disturbance (both human and stochastic) and genetic factors. Primary conservation strategies include (1) preventing risks associated with invasive species by isolating populations of Yellowstone cutthroat trout and (2) connecting occupied habitats (where possible) to preserve metapopulation function and the expression of multiple life histories. Because persistence of isolated populations may be greater in the short term, current management is focused on isolating individual populations and restoring habitats; however, this approach implies that humans will act as dispersal agents if a population is extirpated because of stochastic events.
Status and Management of Interior Stocks of Cutthroat Trout
Author: Robert E. GresswellPublisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 162
Book Description
Conservation Status of Colorado River Cutthroat Trout
Author: Publisher:
ISBN:
Category : Colorado River cutthroat trout
Languages : en
Pages : 40
Book Description
Author: