The effects of low pH and elevated aluminum on yellowstone cutthroat trout (Oncorhynchus clarki bouvieri)

1993 ◽  
Vol 12 (4) ◽  
pp. 719-731 ◽  
Author(s):  
Aïda M. Farag ◽  
Daniel F. Woodward ◽  
Edward E. Little ◽  
Bryan Steadman ◽  
Frank A. Vertucci
Keyword(s):  
Cutthroat Trout ◽  
Low Ph ◽  
Oncorhynchus Clarki ◽  
Oncorhynchus Clarki Bouvieri ◽  
Yellowstone Cutthroat Trout

Life-History Organization of Yellowstone Cutthroat trout (Oncorhynchus clarki bouvieri) in Yellowstone Lake

1994 ◽  
Vol 51 (S1) ◽  
pp. 298-309 ◽  
Author(s):  
Robert E. Gresswell ◽  
William J. Liss ◽  
Gary L. Larson
Keyword(s):  
Life History ◽  
Pacific Northwest ◽  
Great Basin ◽  
Cutthroat Trout ◽  
Hierarchical Level ◽  
Oncorhynchus Clarki ◽  
Migration Strategy ◽  
Yellowstone Lake ◽  
Oncorhynchus Clarki Bouvieri ◽  
Yellowstone Cutthroat Trout

Life-history organization of the cutthroat trout (Oncorhynchus clarki) may be viewed at various levels, including species, subspecies, metapopulation, population, or individual. Each level varies in spatial scale and temporal persistence, and components at each level continually change with changes in environment. Cutthroat trout are widely distributed throughout the western United States, occurring in such diverse environments as coastal rivers of the Pacific Northwest and interior streams of the Great Basin. During its evolution the species has organized into 14 subspecies with many different life-history characteristics and habitat requirements. Within subspecies, organization is equally complex. For example, life-history traits, such as average size and age, migration strategy, and migration timing, vary among individual spawning populations of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in tributary streams of Yellowstone Lake. Understanding the effects of human perturbations on life-history organization is critical for management of the cutthroat trout and other polytypic salmonid species. Loss of diversity at any hierarchical level jeopardizes the long-term ability of the species to adapt to changing environments, and it may also lead to increased fluctuations in abundance and yield and increase the risk of extinction.

scholarly journals Genetic Investigation of Snake River and Yellowstone Cutthroat Trout

2003 ◽  
Vol 27 ◽  
pp. 81-86
Author(s):  
Jeffery Mitton
Keyword(s):  
Mitochondrial Dna ◽  
Natural Populations ◽  
Cutthroat Trout ◽  
Snake River ◽  
Oncorhynchus Clarki ◽  
Genetic Investigation ◽  
Fish Hatchery ◽  
Oncorhynchus Clarki Bouvieri ◽  
Yellowstone Cutthroat Trout ◽  
The Relationship

The relationship between Yellowstone cutthroat trout, Oncorhynchus clarki bouvieri, and Snake River finespotted cutthroat trout, 0. clarki behnkei, was examined with two mitochondrial DNA fragments, COl and ND5. No variation was found within either subspecies, and just one (out of 1069) nucleotide differed between subspecies. Thus, these subspecies are very closely related. Samples for this study were obtained from hatcheries, and may not be representative of the subspecies. 0. c. bouveri were sampled from the Clark Fork Hatchery, in Powell, WY, and 0. c. behnkei were sampled from the National Fish Hatchery in Jackson, WY. Further sampling, preferably from natural populations, is needed to more thoroughly survey the variation within subspecies, and to measure the differences between subspecies.

scholarly journals Hybridization of Snake River Cutthroat in the Lower Gros Ventre River

2006 ◽  
Vol 30 ◽  
pp. 110-113
Author(s):  
Ryan Kovach ◽  
Lisa Eby
Keyword(s):  
Exotic Species ◽  
National Park ◽  
Cutthroat Trout ◽  
Snake River ◽  
Oncorhynchus Clarki ◽  
Oncorhynchus Clarkii ◽  
Grand Teton National Park ◽  
Water Diversions ◽  
Yellowstone Cutthroat Trout ◽  
Special Concern

The cutthroat trout Oncorhynchus clarki is Wyoming's only native trout. The Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) is designated as a "species of special concern" by a number of agencies and conservation groups. Although the Yellowstone cutthroat trout has recently avoided federal listing because of robust headwater populations (USFWS 2006), they face continued threats across their range. The fine-spotted Snake River native trout is a morphologically divergent ecotype of the Yellowstone subspecies, although it is not genetically distinguishable (Allendorf and Leary 1988, Novak et al. 2005). The Gros Ventre, an important tributary of the Snake River located partially in Grand Teton National Park, historically supported robust populations of fine­ spotted Snake River cutthroat trout. Principal threats to Gros Ventre native trout, especially in the lower end of the drainage within the park boundaries, include both water diversions (loss of water and fish into irrigation ditches) and presence of exotic species.

Greater predation by Double-crested Cormorants on cutthroat versus rainbow trout fingerlings stocked in a Wyoming river

1999 ◽  
Vol 77 (12) ◽  
pp. 1984-1990 ◽  
Author(s):  
James R Lovvorn ◽  
Daniel Yule ◽  
Clayton E Derby
Keyword(s):  
Rainbow Trout ◽  
Cutthroat Trout ◽  
Phalacrocorax Auritus ◽  
Limited Data ◽  
Platte River ◽  
The North ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Oncorhynchus Clarki Bouvieri ◽  
Pelecanus Erythrorhynchos ◽  
Yellowstone Cutthroat Trout

We studied the relative vulnerability of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) versus rainbow trout (Oncorhynchus mykiss) stocked as fingerlings in the North Platte River, Wyoming, to Double-crested Cormorant (Phalacrocorax auritus) predation. Cutthroat fingerlings decreased as a fraction of the population from stocking in late June to electrofishing surveys in the following October and March. In contrast, the fraction of cutthroat fingerlings among tagged fingerlings eaten by cormorants collected on the river was significantly greater than that in the population when originally stocked. More limited data from pellets regurgitated by adult cormorants at a nearby colony and in American White Pelicans (Pelecanus erythrorhynchos) collected on the river showed the same trend toward greater percentages of cutthroat trout being consumed than were present among trout stocked. There were no differences in cormorant predation rates on the Eagle Lake strain of rainbow trout reared under shaded versus partially shaded conditions, or between Auburn and Bar BC strains of Snake River (Yellowstone) cutthroat trout. On the North Platte River, cutthroat trout fingerlings were more susceptible to cormorant predation than rainbow trout of similar size that were stocked simultaneously.

THE EFFECTS OF LOW pH AND ELEVATED ALUMINUM ON YELLOWSTONE CUTTHROAT TROUT (ONCORHYNCHUS CLARKIBOUVIERI)

1993 ◽  
Vol 12 (4) ◽  
pp. 719
Author(s):  
Aïda M. Farag ◽  
Daniel F. Woodward ◽  
Edward E. Little ◽  
Bryan Steadman ◽  
Frank A. Vertucci
Keyword(s):  
Cutthroat Trout ◽  
Low Ph ◽  
Yellowstone Cutthroat Trout
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