Range-wide status of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri): 2001

May, Bruce; Urie, Wendi; Shepard, Bradley B.; Montana.,; Idaho,; Wyoming.,

doi:10.5962/bhl.title.45714

Cited by 18 publications

(126 citation statements)

References 21 publications

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“…Conservation strategies for inland cutthroat trout including WCT often advocate a combination of efforts to either isolate or reconnect populations to reduce threats from nonnative trout or isolation, respectively (Lentsch et al 2000;May et al 2003;Shepard et al 2005). An objective analysis of the issues and opportunities for either action, however, can be a challenge.…”

Section: Discussionmentioning

confidence: 99%

“…Other inland cutthroat trout face similar situations (e.g., May et al 2003;Hirsch et al 2006;Pritchard and Cowley 2006). Intentional migration barriers could be important tools to reduce any additional threat of invasion in these systems, but priorities might favor isolation of the largest populations and best habitats.…”

Section: General Guidance and Further Workmentioning

confidence: 93%

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Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)

Peterson¹,

Rieman²,

Dunham³

et al. 2008

Can. J. Fish. Aquat. Sci.

121

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Native salmonid fishes often face simultaneous threats from habitat fragmentation and invasion by nonnative trout species. Unfortunately, management actions to address one may create or exacerbate the other. A consistent decision process would include a systematic analysis of when and where intentional use or removal of barriers is the most appropriate action. We developed a Bayesian belief network as a tool for such analyses. We focused on native westslope cutthroat trout (Oncorhynchus clarkii lewisi) and nonnative brook trout (Salvelinus fontinalis) and considered the environmental factors influencing both species, their potential interactions, and the effects of isolation on the persistence of local cutthroat trout populations. The trade-offs between isolation and invasion were strongly influenced by size and habitat quality of the stream network to be isolated and existing demographic linkages within and among populations. An application of the model in several sites in western Montana (USA) showed the process could help clarify management objectives and options and prioritize conservation actions among streams. The approach can also facilitate communication among parties concerned with native salmonids, nonnative fish invasions, barriers and intentional isolation, and management of the associated habitats and populations.Résumé : Les poissons salmonidés indigènes font souvent face simultanément à une double menace représentée par la fragmentation des habitats et l'invasion de salmonidés non indigènes. Malheureusement, les aménagements faits pour régler un de ces problèmes peuvent faire surgir ou exacerber le second. Un processus de décision cohérent devrait inclure une analyse systématique du moment et de l'endroit les plus appropriés pour l'érection ou le retrait de barriè-res. Nous avons mis au point un réseau de croyance bayésien pour servir d'outil pour ces analyses. Nous nous sommes intéressés spécifiquement à la truite fardée (Oncorhynchus clarkii lewisi) indigène du versant occidental et à l'omble de fontaine (Salvelinus fontinalis) non indigène; nous avons tenu compte des facteurs du milieu qui influencent les deux espèces, de leurs interactions potentielles et des effets de l'isolement sur la persistance des populations locales de truites fardées. Les compromis entre l'isolement et l'invasion sont fortement influencés par la taille et la qualité des habitats du réseau de cours d'eau à isoler, ainsi que par les liens démographiques établis à l'intérieur des populations et entre elles. L'utilisation du modèle dans plusieurs sites de l'ouest du Montana (É.-U.) montre que le processus peut servir à éclaircir les objectifs et les options de l'aménagement et à établir les priorités des initiatives de conservation dans les différents cours d'eau. Cette méthode peut aussi faciliter la communication entre les divers intervenants préoc-cupés par les salmonidés indigènes, les invasions de poissons non indigènes, les barrières et l'isolement délibéré, ainsi que par l'aménagement des habitats et des populations ...

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Section: Discussionmentioning

confidence: 99%

Section: General Guidance and Further Workmentioning

confidence: 93%

Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)

Peterson¹,

Rieman²,

Dunham³

et al. 2008

Can. J. Fish. Aquat. Sci.

121

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“…1) We defined the spatial extent for historic and current distributions based on the most recent range-wide assessments for Bonneville cutthroat trout (May and Albeke, 2005), Colorado River cutthroat trout (Hirsch and others, 2006), westslope cutthroat trout (Shepard and others, 2003), Rio Grande cutthroat trout (Alves and others, 2007), and Yellowstone cutthroat trout (May and others, 2007 Geographic scope of project and ranges of native trout and grayling evaluated in the broad-scale assessment. Areas in green represent the historic distribution of the selected subspecies, while areas in red represent more detailed analyses in selected areas based on the availability of data.…”

Section: Study Areamentioning

confidence: 99%

The potential influence of changing climate on the persistence of salmonids of the inland west

Haak¹,

Williams²,

Isaak³

et al. 2010

Open-File Report

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“…All historical populations in the Bear River and Northern Bonneville areas as well as those in the Sevier River drainage (Southern Bonneville) were classified as core populations. Comparisons to recent surveys (May and Albeke 2007) show declines of 62% for habitat occupied by core populations and 91% for habitat occupied by disjunct peripheral populations (Table 1). Only 124 km of habitat is still occupied by remaining disjunct peripheral populations (Figure 4).…”

Section: General Distributions and Declinesmentioning

confidence: 85%

“…comm. ), Colorado River cutthroat trout (Hirsch et al 2006), Yellowstone cutthroat trout (May et al 2007), westslope cutthroat trout (Shepard et al 2003), and Rio Grande cutthroat trout (Alves et al 2007) with supplements in the Texas portion of the range from Garrett and Matlock (1991), and are described in Trout Unlimited's Conservation Success Index (Williams et al 2007). …”

Section: Defining Peripheral Populations Based On Historical Distribumentioning

confidence: 96%

Conserving Peripheral Trout Populations: The Values and Risks of Life on the Edge

Haak¹,

Williams²,

Neville³

et al. 2010

Fisheries

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Peripheral populations-generally defined as those at the geographic edge of the range-often have increased conservation value due to their potential to maximize within-species biodiversity, retain important evolutionary legacies, and provide the fodder for future adaptation. However, there has been little exploration of their conservation value in aquatic systems. Inland cutthroat trout (Oncorhynchus clarkii) subspecies provide a unique opportunity to evaluate the distribution of peripheral populations and patterns of persistence across a wide range of environmental conditions. Our assessment analyzed range-wide losses of peripheral and core populations since the 1800s, and evaluated the likelihood of persistence for remaining populations of five cutthroat trout subspecies: Bonneville, Colorado River, Yellowstone, Rio Grande, and westslope. For all five, we found that core and peripheral populations have declined substantially, but the amounts of habitat occupied by peripheral populations generally have declined at a greater magnitude. The more isolated peripheral populations typically exhibited the greatest declines. Remaining peripheral populations often failed to meet minimum persistence criteria. Our characterization of peripheral populations and their losses emphasizes the need for closer evaluation of conservation priorities and management actions for cutthroat trout and other fishes if the values of peripheral populations are to be maintained.

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Range-wide status of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri): 2001

Cited by 18 publications

References 21 publications

Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)

Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)

The potential influence of changing climate on the persistence of salmonids of the inland west

Conserving Peripheral Trout Populations: The Values and Risks of Life on the Edge

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