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ID: Cause of death, pathology, and chronic wasting disease status of white-tailed deer (Odocoileus virginianus) mortalities in Wisconsin, USA
Cause of death, pathology, and chronic wasting disease status of white-tailed deer (Odocoileus virginianus) mortalities in Wisconsin, USA
Type: Article
Subjects: Ectoparasitism
Infectious disease
Comorbidity
Nutritional condition
Item
view first image of Cause of death, pathology, and chronic wasting disease status of white-tailed deer (Odocoileus virginianus) mortalities in Wisconsin, USA
Cause of death, pathology, and chronic wasting disease status of white-tailed deer (Odocoileus virginianus) mortalities in Wisconsin, USA
Type:Article
Subject:Ectoparasitism
Infectious disease
Comorbidity
Nutritional condition
Description:White-tailed deer (WTD; Odocoileus virginianus) are a critical species for ecosystem function and wildlife management. As such, studies of cause-specific mortality among WTD have long been used to understand population dynamics. However, detailed pathological information is rarely documented for free-ranging WTD, especially in regions with a high prevalence of chronic wasting disease (CWD). This leaves a significant gap in understanding how CWD is associated with disease processes or comorbidities that may subsequently alter broader population dynamics. We investigated unknown mortalities among collared WTD in southwestern Wisconsin, USA, an area of high CWD prevalence. We tested for associations between CWD and other disease processes and used a network approach to test for co-occurring disease processes. Predation and infectious disease were leading suspected causes of death, with high prevalence of CWD (42.4%; of 245 evaluated) and pneumonia (51.2%; of 168 evaluated) in our sample. CWD prevalence increased with age, before decreasing among older individuals, with more older females than males in our sample. Females were more likely to be CWD positive, and although this was not statistically significant when accounting for age, females were significantly more likely to die with end-stage CWD than males and may consequently be an underrecognized source of CWD transmission. Presence of CWD was associated with emaciation, atrophy of marrow fat and hematopoietic cells, and ectoparasitism (lice and ticks). Occurrences of severe infectious disease processes clustered together (e.g., pneumonia, CWD), as compared to noninfectious or low-severity processes (e.g., sarcocystosis), although pneumonia cases were not fully explained by CWD status. With the prevalence of CWD increasing across North America, our results highlight the critical importance of understanding the potential role of CWD in favoring or maintaining disease processes of importance for deer population health and dynamics. [show more]
ID: Cause specific mortality of mountain plover (Charadrius montanus) chicks in eastern Colorado: phase III. A pilot field study
Cause specific mortality of mountain plover (<em>Charadrius montanus</em>) chicks in eastern Colorado: phase III. A pilot field study
Type: Text
Subjects: Mountain plover
<em>Charadrius montanus</em>
Wildlife management
Item
view first image of Cause specific mortality of mountain plover (<em>Charadrius montanus</em>) chicks in eastern Colorado: phase III. A pilot field study
Cause specific mortality of mountain plover (<em>Charadrius montanus</em>) chicks in eastern Colorado: phase III. A pilot field study
Type:Text
Subject:Mountain plover
<em>Charadrius montanus</em>
Wildlife management
Description:The mountain plover (Charadrius montanus) is a species of special concern in Colorado with >50% of the continental population believed to breed in the eastern half of the state. In eastern Colorado breeding plovers primarily use short-grass prairie habitats consisting of grasslands with and without black-tailed prairie dogs (Cynomys ludovicianus) and agricultural fields. The nesting ecology of mountain plovers has been well-studied across the species’ breeding range and nest success is similar among the eastern Colorado short grass habitats (Dreitz and Knopf 2007). However, chick survival and brood movement patterns were found to differ between habitats and were not related to differences in prey resource availability among habitats (Dreitz 2009). Further information on cause-specific mortality of chicks is needed to understand differences in brood-rearing behavior and success among different habitats. [show more]
ID: Chemical immobilization in American black bears using a combination of nalbuphine, medetomidine, and azaperone
Chemical immobilization in American black bears using a combination of nalbuphine, medetomidine, and azaperone
Type: Article
Subjects: Black bear
Atipamezole
Azaperone
Chemical immobilization
Medetomidine
Sedation
Tranquilizer
Item
view first image of Chemical immobilization in American black bears using a combination of nalbuphine, medetomidine, and azaperone
Chemical immobilization in American black bears using a combination of nalbuphine, medetomidine, and azaperone
Type:Article
Subject:Black bear
Atipamezole
Azaperone
Chemical immobilization
Medetomidine
Sedation
Tranquilizer
Description:Safe and effective but unscheduled drug combinations are needed for wildlife immobilization in some jurisdictions. To this end, we evaluated a combination of nalbuphine HCl (40 mg/mL), medetomidine HCl (10 mg/mL), and azaperone tartrate (10 mg/mL)—referred to as NalMed-A (or NAM)—in 28 American black bears (Ursus americanus), captured during June to August 2014 as part of an ongoing study conducted in and around Durango, Colorado, USA. We effectively immobilized all bears; induction (mean ¡ SE) was 16.2 ¡ 0.9 minutes (n 5 25) and reversal was 19 ¡ 1.6 minutes (n 5 24). Advantages of NalMed-A included low delivery volume, good sedation quality, and effective reversal. Moreover, NalMed-A does not contain compounds regulated by the U.S. Drug Enforcement Administration, making it a useful unscheduled immobilization combination. Based on these and subsequent field experiences, our dosing recommendations are 0.5–1 mL NalMed-A/45.5 kg estimated body mass (0.44–0.88 mg nalbuphine HCl/kg, 0.11–0.22 mg azaperone tartrate/kg, and 0.11–0.22 mg medetomidine HCl/kg), and 5 mg atipamezole HCl/mg medetomidine for antagonism. [show more]
ID: Chronic Wasting Disease in Colorado (2018)
Chronic Wasting Disease in Colorado (2018)
Type: Fact Sheet
Subjects: Chronic wasting disease
Item
view first image of Chronic Wasting Disease in Colorado (2018)
Chronic Wasting Disease in Colorado (2018)
Type:Fact Sheet
Subject:Chronic wasting disease
Description:Describes CWD, species affected, hunter precautions, mandatory CWD testing, and CWD management
ID: Chuck Anderson, Head of Mammals Research
Chuck Anderson, Head of Mammals Research
Type:
Subjects:
Item
view first image of Chuck Anderson, Head of Mammals Research
Chuck Anderson, Head of Mammals Research
Description:

Chuck AndersonMammals Research Section Leader

Current or Recent Research Projects

Mitigating Impacts of Energy Development on Piceance Basin Mule Deer Populations

Areas of Interest and Expertise

My research focuses on large mammal ecology and management, with an emphasis on population dynamics, population monitoring, and population genetics.

Streaming Videos

Wild Science: Mule Deer in the Piceance Basin

Select Publications

Education

  • Ph.D., Zoology and Physiology — University of Wyoming, 2003
  • M.S., Zoology and Physiology — University of Wyoming, 1994
  • B.S., Wildlife Biology — Colorado State University, 1990

Current or Recent Positions

  • Mammals Researcher Section Leader — Colorado Parks and Wildlife, 2013-Present
  • Wildlife Researcher — Colorado Parks and Wildlife, 2006-2013
  • Affiliate Faculty — Idaho State University, 2009-Present
  • Affiliate Faculty — Colorado State University, 2012-Present
 [show more]
ID: Colorado Angler Catches 'Unofficial' Record-Sized Smallmouth Bass
Colorado Angler Catches 'Unofficial' Record-Sized Smallmouth Bass
Type:
Subjects:
Item
view first image of Colorado Angler Catches 'Unofficial' Record-Sized Smallmouth Bass
Colorado Angler Catches 'Unofficial' Record-Sized Smallmouth Bass
Description:Everyone enjoys a good fish story. In this video, Colorado angler Jorge Garcia shares the tale of a record-sized smallmouth that he caught while fishing at a small lake in northeast Denver on April 16, 2021. Although he is not an official state-record holder, Garcia was thrilled to catch this once-in-a-lifetime fish and discuss his passion for fishing and for helping others. Learn more about Colorado's State Fishing Records Program: https://cpw.state.co.us/learn/Pages/RecordsbyWeight.aspx Video produced by Jerry Neal/CPW [show more]
ID: Colorado Big Game Hunting Series: Part 3 - Gear, Optics, Scouting and More
Colorado Big Game Hunting Series: Part 3 - Gear, Optics, Scouting and More
Type:
Subjects:
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view first image of Colorado Big Game Hunting Series: Part 3 - Gear, Optics, Scouting and More
Colorado Big Game Hunting Series: Part 3 - Gear, Optics, Scouting and More
Description:https://coloradooutdoorsmag.com/colorado-big-game-hunting-series-part-3/ In part 3 of the Colorado Big Game Hunting Series, Nate Zelinsky joined Colorado Parks and Wildlife for a live question and answer event that covered gear, optics, scouting, methods of take and much more. Related Resources Colorado Big Game Brochure https://cpw.state.co.us/Documents/RulesRegs/Brochure/BigGame/biggame.pdf Colorado Sheep & Goat Brochure https://cpw.state.co.us/Documents/RulesRegs/Brochure/SheepandGoat.pdf Hunter Education https://cpw.state.co.us/learn/Pages/HunterEducation.aspx Link to Colorado Hunting Atlas https://ndismaps.nrel.colostate.edu/index.html Shooting Ranges https://cpw.state.co.us/thingstodo/Pages/ShootingRanges.aspx [show more]
ID: Colorado Big Game Hunting Series: Part 5 - Glassing for Big Game
Colorado Big Game Hunting Series: Part 5 - Glassing for Big Game
Type:
Subjects:
Item
view first image of Colorado Big Game Hunting Series: Part 5 - Glassing for Big Game
Colorado Big Game Hunting Series: Part 5 - Glassing for Big Game
Description:https://coloradooutdoorsmag.com/colorado-big-game-hunting-series-part-5/ Whether Hunting or Scouting, learning to efficiently use binoculars or a spotting scope is a must. Here’s Nate Zelinsky with a few tips on glassing.
ID: Colorado Department of Game and Fish porcelain sign
Colorado Department of Game and Fish porcelain sign
Type: Image
Subjects: Colorado Department of Game and Fish
Item
view first image of Colorado Department of Game and Fish porcelain sign
Colorado Department of Game and Fish porcelain sign
Type:Image
Subject:Colorado Department of Game and Fish
Description:Colorado Department of Game and Fish porcelain sign
ID: Colorado Division of Wildlife logo
Colorado Division of Wildlife logo
Type: Image
Subjects: Colorado Division of Wildlife
Item
view first image of Colorado Division of Wildlife logo
Colorado Division of Wildlife logo
Type:Image
Subject:Colorado Division of Wildlife
Description:Colorado Division of Wildlife logo