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ID: Swift Fox Conservation Team Annual and Biennial Reports (1995- present)
Swift Fox Conservation Team Annual and Biennial Reports (1995- present)
Type: Text
Subjects:
Item
view first image of Swift Fox Conservation Team Annual and Biennial Reports (1995- present)
Swift Fox Conservation Team Annual and Biennial Reports (1995- present)
Type:Text
ID: Swift Fox Conservation Team Newsletters (occasional, 1997-2016)
Swift Fox Conservation Team Newsletters (occasional, 1997-2016)
Type: Text
Subjects:
Item
view first image of Swift Fox Conservation Team Newsletters (occasional, 1997-2016)
Swift Fox Conservation Team Newsletters (occasional, 1997-2016)
Type:Text
ID: Swift Fox Conservation Team: Agency / Partner Documents
Swift Fox Conservation Team: Agency / Partner Documents
Type: Text
Subjects:
Item
view first image of Swift Fox Conservation Team: Agency / Partner Documents
Swift Fox Conservation Team: Agency / Partner Documents
Type:Text
ID: Tawni B. Firestone
Tawni B. Firestone
Type:
Subjects:
Item
view first image of Tawni B. Firestone
Tawni B. Firestone
Description:Aquatic Research Scientist Toxicology and Disease

Contact Information

200 S Spruce St., Gunnison, CO 81230Email:  href="mailto:adam.hansen@state.co.us">tawni.firestone@state.co.usPhone: 970-666-0912

Education

  • Ph.D. Fish, Wildlife, and Conservation Biology - Colorado State University 2022
  • B.S. Biology - University of Wisconsin-Oshkosh 2013

Current or Recent Positions

  • Aquatic Research Scientist - Colorado Parks and Wildlife 2023 - Present
  • Toxicology Postdoctoral Researcher - Colorado Parks and Wildlife 2022-2023
  • Graduate Research Assistant - Colorado State University, Colorado Cooperative Fish and Wildlife Research Unit 2018-2022
  • Fish Pathology Technician - Colorado Parks and Wildlife 2015-2018

Current or Recent Research Projects

  • Application Methods to Apply EarthTec QZ as an Attempt to Eradicate Zebra Mussels from Highline Lake
  • Assessing Water Quality Impacts on Genetic Recruitment of Native Suckers in the Gunnison River
  • Effects of Road Salts on Cutthroat Trout
  • Effects of copper, chloride, and chlorine on drift and chemical avoidance of benthic macroinvertebrates and salmonids
  • Establishing Temperature Tolerance Ranges for Native Fish Species through Electrocardiogram Analysis
  • Field-based Temperature Standards for Bluehead Sucker (Catostomus discobolus), Flannelmouth Sucker (Catostomus latipinnis), and Roundtail Chub (Gila robusta)
  • Leveraging detection uncertainty to estimate Renibacterium salmoninarum infection status among multiple tissues and assays
  • Non-lethal detection of Renibacterium salmoninarum in Cutthroat Trout Oncorhynchus clarkii comparing mucus, blood, and ovarian fluid samples to kidney tissues
  • Pathogenesis of Renibacterium salmoninarum in Chinook Salmon following intraperitoneal injection: Description of disease progression using qPCR and histopathology
  • Temperature tolerance of Flannelmouth sucker larvae
  • Temperature tolerance of Bluehead sucker larvae
  • The importance of a nuanced approach to developing aquatic species-specific temperature standards: A review

Areas of Interest/Expertise

I study complex interactions between aquatic wildlife and their environments by conducting research on biological and physiological mechanisms to better understand how various pollutants, toxicants, temperature, or disease affect aquatic organisms.

Publications

Riepe, T. B., Z. E. Hooley-Underwood, and M. Johnson. 2024. Thermal tolerance of larval flannelmouth sucker Catostomus latipinnis acclimated to three temperatures. Fishes 9(5):181.Riepe, T. B., Z. E. Hooley-Underwood, R. E. McDevitt, A. Sralik, and P. Cadmus. 2023. Increased density of Bluehead Sucker larvae decreases critical thermal maximum. North American Journal of Fisheries Management. 43(4):1135-1142.Riepe T. B., E. R. Fetherman, B. Neuschwanger, T. Davis, A. Perkins, and D. L. Winkelman. 2023. Vertical transmission of Renibacterium salmoninarum in Cutthroat Trout (Oncorhynchus clarkii). Journal of Fish Diseases 46(4):303-319.Riepe, T. B., B. W. Avila, and D. L. Winkelman. 2022. Effects of 17⍺-ethinylestradiol and density on juvenile fathead minnow survival and body size. Journal of Aquatic Pollution and Toxicology 6:60.Kowalski, D. A., R. J. Cordes, T. B. Riepe, J. D. Drennan, and A. J. Treble. 2022. Prevalence and distribution of Renibacterium salmoninarum, the causative agent of bacterial kidney disease, in wild trout fisheries in Colorado. Diseases of Aquatic Organisms 149:109-120.Riepe, T. B., V. Vincent, V. Milano, E. R. Fetherman, and D. L. Winkelman 2021. Evidence for the use of mucus swabs to detect Renibacterium salmoninarum in Brook Trout Pathogens 10(4):460.Johnson P. T. J., D. M. Calhoun, W. E. Moss, T. McDevitt-Galles, T. B. Riepe, J. Dallas, T. Parchman, C. Feldman, J. Cropanzo, J. Bowerman, and J. Koprivnikar. 2020. The cost of travel: how dispersal ability limits local adaption in host-parasite interactions. Journal of Evolutionary Biology 34(3):512-524.Johnson P. T. J., D. M. Calhoun, T. B. Riepe, T. McDevitt-Galles, and J. Koprivnikar. 2019. Community disassembly and disease: realistic - but not randomized - biodiversity losses inhibit parasite transmission. Proceedings of the Royal Society B 286(1902).Riepe T. B., D. M. Calhoun, and P. T. J. Johnson. 2019. Comparison of direct and indirect techniques to detect intestinal parasites in newts (Salamandridae Taricha). Diseases of Aquatic Organisms 134:137–146.Johnson P. T. J., D. M. Calhoun, T. B. Riepe, and J. Koprivnikar. 2019. Chance or choice? Understanding selection by parasites in multi-host communities. International Journal for Parasitology 49:407–415.Calhoun D. M., L. K. Leslie, T. B. Riepe, T. J. Achatz, T. McDevitt-Galles, V. V. Tkach, and P. T. J. Johnson. 2019. Patterns of Clinostomum spp. infection in fishes and amphibians: integration of field, genetic, and experimental approaches. Journal of Helminthology94:1–12.Koprivnikar J., T. B. Riepe, D. M. Calhoun, and P. T. J. Johnson. 2018. Whether larval amphibians school does not affect the parasite aggregation rule: testing the effects of host spatial heterogeneity in field and experimental studies. Oikos 127:99–110. [show more]
ID: Tech Pub cover photo
Tech Pub cover photo
Type:
Subjects:
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Tech Pub cover photo
ID: Temporal variation and scale in movement-based resource selection functions
Temporal variation and scale in movement-based resource selection functions
Type: Article
Subjects: Animal movement
Kullback–Leibler
Telemetry data
Item
view first image of Temporal variation and scale in movement-based resource selection functions
Temporal variation and scale in movement-based resource selection functions
Type:Article
Subject:Animal movement
Kullback–Leibler
Telemetry data
Description:A common population characteristic of interest in animal ecology studies pertains to the selection of resources. That is, given the resources available to animals, what do they ultimately choose to use? A variety of statistical approaches have been employed to examine this question and each has advantages and disadvantages with respect to the form of available data and the properties of estimators given model assumptions. A wealth of high resolution telemetry data are now being collected to study animal population movement and space use and these data present both challenges and opportunities for statistical inference. We summarize traditional methods for resource selection and then describe several extensions to deal with measurement uncertainty and an explicit movement process that exists in studies involving high-resolution telemetry data. Our approach uses a correlated random walk movement model to obtain temporally varying use and availability distributions that are employed in a weighted distribution context to estimate selection coefficients. The temporally varying coefficients are then weighted by their contribution to selection and combined to provide inference at the population level. The result is an intuitive and accessible statistical procedure that uses readily available software and is computationally feasible for large datasets. These methods are demonstrated using data collected as part of a large-scale mountain lion monitoring study in Colorado, USA. [show more]
ID: Testing Fish Marking Methods to Assess Stocking Success
Testing Fish Marking Methods to Assess Stocking Success
Type:
Subjects:
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view first image of Testing Fish Marking Methods to Assess Stocking Success<br />
Testing Fish Marking Methods to Assess Stocking Success
Description:

Led By

J​esse Lepak​

Study Area

Eastern Slope

Project Status

Completed

Research Objectives

  • To test fish marking methods as a way to assess stocking success.

Project Description

Researchers can utilize fish marking as a way to determine fish growth, movement, survival, reproduction and more. This information, in turn, can be used to assess stocking success.

Therefore, CPW initiated a research project to investigate fish marking techniques. These techniques wi​ll be used to assess walleye fry (recently hatched fish) versus fingerling (juvenile fish) success after stocking[L1] .

Researchers tested oxytetracycline as a possible marking method. A type of antibiotic, oxytetracycline turns fluorescent green-yellow under a particular wavelength of light. To mark fish, researchers submerge them into an oxytetracycline solution; the fish then incorporate the oxytetracycline into their hard parts (e.g., bones).  This can later be viewed in the lab after the fish is captured again in the wild after stocking.

Based on the results of this project, researchers determined oxytetracycline as an effective marking technique. This technique will be applied by biologists to monitor walleye fry and fingerling stocking success and survival.

 [show more]
ID: The cascading effects of human food on hibernation and cellular aging in free-ranging black bears
The cascading effects of human food on hibernation and cellular aging in free-ranging black bears
Type: Article
Subjects: Adaptations
Senescence
Demography
Hibernation
Aging

Bears
Food
Item
view first image of The cascading effects of human food on hibernation and cellular aging in free-ranging black bears
The cascading effects of human food on hibernation and cellular aging in free-ranging black bears
Type:Article
Subject:Adaptations
Senescence
Demography
Hibernation
Aging

Bears
Food
Description:Human foods have become a pervasive subsidy in many landscapes, and can dramatically alter wildlife behavior, physiology, and demography. While such subsidies can enhance wildlife condition, they can also result in unintended negative consequences on individuals and populations. Seasonal hibernators possess a remarkable suite of adaptations that increase survival and longevity in the face of resource and energetic limitations. Recent work has suggested hibernation may also slow the process of senescence, or cellular aging. We investigated how use of human foods influences hibernation, and subsequently cellular aging, in a large-bodied hibernator, black bears (Ursus americanus). We quantified relative telomere length, a molecular marker for cellular age, and compared lengths in adult female bears longitudinally sampled over multiple seasons. We found that bears that foraged more on human foods hibernated for shorter periods of time. Furthermore, bears that hibernated for shorter periods of time experienced accelerated telomere attrition. Together these results suggest that although hibernation may ameliorate cellular aging, foraging on human food subsidies could counteract this process by shortening hibernation. Our findings highlight how human food subsidies can indirectly influence changes in aging at the molecular level. [show more]
ID: The diet of black bears tracks the human footprint across a rapidly developing landscape
The diet of black bears tracks the human footprint across a rapidly developing landscape
Type: Article
Subjects: Foraging
Human-wildlife conflict
Resource subsidies
Stable isotopes
<em>Ursus americanus</em>
Item
view first image of The diet of black bears tracks the human footprint across a rapidly developing landscape
The diet of black bears tracks the human footprint across a rapidly developing landscape
Type:Article
Subject:Foraging
Human-wildlife conflict
Resource subsidies
Stable isotopes
<em>Ursus americanus</em>
Description:Food subsidies have become a widely available and predictable resource in human-modified landscapes for many  from ScienceDirect's AI-generated Topic Pages" class="topic-link">vertebrate species. Such resources can alter individual foraging behavior of animals, and induce population-wide changes. Yet, little consensus exists about the relative influence of the availabilities of native and human food subsidies to wildlife foraging throughout altered landscapes. We explored this unresolved question by analyzing the effects of landscape factors on American black bear (Ursus americanus) diet across the state of Colorado, USA. We estimated assimilated diet using stable isotope analysis of harvested black bear tissues to determine the contribution of human-derived foods to bear diets throughout Colorado, as well as how increasing reliance on human-derived food subsidies increases the risk of conflict. We found that bears (n = 296) showed strong regional diet variability, but substantial use of human-derived food subsidies in eastern Colorado (> 30% assimilated diet). The age-sex class of the bear and housing density of its harvest location were the most influential predictors of 13C enrichment (a tracer of human food subsidies). Furthermore, foraging on subsidies increased risk of conflict; the odds of being a nuisance bear increased by 60% for each ~ 1‰ increase in δ13C. Our study confirms the efficacy of δ13C as a proxy for human activity, and indicates that while demographic differences play a clear role in the foraging ecology of bears, availability of subsidies coincident with varying levels of human activity appears to be a major driver in predicting black bear diet throughout the western United States. [show more]
ID: The effects of demographic, social, and environmental characteristics on pathogen prevalence in wild felids across a gradient of urbanization
The effects of demographic, social, and environmental characteristics on pathogen prevalence in wild felids across a gradient of urbanization
Type: Article
Subjects: Felidae
Virology
Theoretical models
Microbiology
Lynx
Puma
Parasitology
Animal behavior
Colorado
Item
view first image of The effects of demographic, social, and environmental characteristics on pathogen prevalence in wild felids across a gradient of urbanization
The effects of demographic, social, and environmental characteristics on pathogen prevalence in wild felids across a gradient of urbanization
Type:Article
Subject:Felidae
Virology
Theoretical models
Microbiology
Lynx
Puma
Parasitology
Animal behavior
Colorado
Description:Transmission of pathogens among animals is influenced by demographic, social, and environmental factors. Anthropogenic alteration of landscapes can impact patterns of disease dynamics in wildlife populations, increasing the potential for spillover and spread of emerging infectious diseases in wildlife, human, and domestic animal populations. We evaluated the effects of multiple ecological mechanisms on patterns of pathogen exposure in animal populations. Specifically, we evaluated how ecological factors affected the prevalence of Toxoplasma gondii (Toxoplasma), Bartonella spp. (Bartonella), feline immunodeficiency virus (FIV), and feline calicivirus (FCV) in bobcat and puma populations across wildland-urban interface (WUI), low-density exurban development, and wildland habitat on the Western Slope (WS) and Front Range (FR) of Colorado during 2009–2011. Samples were collected from 37 bobcats and 29 pumas on the WS and FR. As predicted, age appeared to be positively related to the exposure to pathogens that are both environmentally transmitted (Toxoplasma) and directly transmitted between animals (FIV). In addition, WS bobcats appeared more likely to be exposed to Toxoplasma with increasing intraspecific space-use overlap. However, counter to our predictions, exposure to directly-transmitted pathogens (FCV and FIV) was more likely with decreasing space-use overlap (FCV: WS bobcats) and potential intraspecific contacts (FIV: FR pumas). Environmental factors, including urbanization and landscape covariates, were generally unsupported in our models. This study is an approximation of how pathogens can be evaluated in relation to demographic, social, and environmental factors to understand pathogen exposure in wild animal populations. [show more]