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Ep. 937: What Happens If We Let CWD Rip?

The MeatEater Podcast

Hosted by Steven Rinella

2h 2m
Transcript

Original podcast

Summary

Written by a model from the transcript; not yet reviewed.

Steven Rinella is joined by Jason Sumners, the Director of the Missouri Department of Conservation and a deer biologist, to discuss chronic wasting disease as the primary issue impacting deer, deer hunters, and wildlife management. Sumners explains the history of tracking CWD since 2010, the differences between broad-brush regulations and localized surgical removal, and why prevalence tends to accelerate past a five percent inflection point. They debate the paradox of managing a herd decline to prevent a worse disease-driven collapse, the challenges of public trust and changing attitudes, and the realities of how prions spread through wild and captive cervid populations.

  • Wildlife agencies monitor adult males at taxidermists to detect CWD early in the population. 14:32
  • Localized removal efforts can keep prevalence flat or steady for over a decade in core areas. 25:54
  • Prion diseases have no immune response, making traditional vaccine and treatment approaches ineffective. 1:08:10
  • Once a wild population passes a five percent prevalence threshold, the disease spreads exponentially. 35:24

Chapters

  1. 0:00
    Podcast Intro and Advertisements

    The episode opens with a series of commercial spots and a brief introduction before the hosts begin the main conversation.

  2. 2:18
    Introduction of Guest and CWD Overview

    The host introduces Jason Sumners, Missouri’s State Fish and Wildlife Director, and outlines chronic wasting disease as the central issue.

  3. 8:33
    Personal History and Early CWD Awareness

    Sumners recounts his upbringing, education, and first exposure to CWD during graduate studies in the early 2000s.

  4. 12:02
    Early Sampling Efforts and Detection Limits

    Discussion of intensive sampling from 2002-2004, the statistical confidence of detecting CWD, and the realization that low prevalence made detection difficult.

  5. 14:13
    Shift to Targeted Taxidermist Sampling

    Explains the move to focus on adult male deer via taxidermists to increase early detection probability.

  6. 16:00
    Illinois vs. Wisconsin Management Models

    Comparison of Illinois’s localized, intensive removal strategy with Wisconsin’s broad population reduction approach and their outcomes.

  7. 20:00
    Challenges of Spread and Resource Constraints

    Describes how CWD spread across southern Missouri, the limitations of manpower and funding, and the need to prioritize efforts.

  8. 48:34
    Public Perception, Mistrust, and Tribalism

    Explores how hunters’ attitudes shifted, the rise of skepticism post‑COVID, and the emergence of tribal divisions over CWD management.

  9. 53:09
    Reevaluating Postseason Targeted Removal

    The speakers discuss ending controversial targeted removal work and shifting focus to supporting hunters and landowners during the hunting season.

  10. 55:44
    Disease Dynamics and Population Impact

    Speakers examine how CWD changes deer age structure, mortality patterns, and the long-term effects on herd health and hunter harvests.

  11. 1:00:00
    Transmission Mechanisms and Unknowns

    The conversation turns to the mystery of how CWD jumps between areas, debating carcass movement, captive deer, and the infectious dose needed for transmission.

  12. 1:24:00
    Genetics and Potential Resistance

    They discuss the 96SS gene variant, its role in delayed disease progression, and the feasibility of using genetics to build more resilient deer populations.

  13. 1:39:02
    Management Strategies and Adaptive Harvest

    The dialogue focuses on how adaptive harvest management can reduce prevalence, the importance of early detection, and the limits of eradication efforts.

  14. 1:46:38
    CWD Sampling Bias and Prevalence

    Speakers discuss how hunter‑submitted samples skew CWD prevalence data and the difference between apparent and true prevalence.

  15. 1:47:29
    Statistical Challenges in CWD Data

    The conversation turns to the statistical complexities of estimating disease prevalence from biased samples and the impact on management decisions.

Highlights

  • 2:54

    The Dominant Issue in Deer Managementinsight

    Steven Rinella asserts that chronic wasting disease is the number one issue impacting deer and hunters, driving every management decision and sparking intense debate for decades.

  • 12:08

    Proactive Baseline Testing in Missouridata

    Jason Sumners explains how Missouri tested 22,000 deer between 2002 and 2004, establishing a baseline proving the disease was absent or present at less than one percent.

  • 18:47

    Contrasting Management Strategiesstrategy

    Sumners details the management divergence between Illinois, which used localized three-mile core removals, and Wisconsin, which relied on broad population reductions.

  • 35:24

    The Five Percent Tipping Pointinsight

    Sumners explains that once CWD prevalence reaches about five percent in an area, contact rates become exponential and the disease accelerates rapidly.

  • 57:12

    Forest Versus Ag Movementinsight

    Sumners explains that deer in heavily forested landscapes have much smaller home ranges and move far less than deer in agricultural areas.

  • 1:08:10

    The Absence of Immune Responseinsight

    Sumners notes that because the body recognizes prions simply as a protein rather than a foreign invader, there is no immune response or natural recovery.

  • 1:28:49

    High Prevalence in Northern Herdsdata

    Sumners discusses reports of adult male prevalence reaching up to seventy-five percent in parts of Alberta and Saskatchewan.

Quotes

  • “We want hunters to be in a position where they continue to appreciate having these deer on the landscape.”
    Unnamed speaker · 28:43
  • “There's no exit strategy. There's just changing and adapting our management approach.”
    Unnamed speaker · 52:35
  • “So if you're not going to be effective and all you do is pissing people off.”
    Unnamed speaker · 54:21
  • “And the things that you're describing are all on that spectrum of a carcass.”
    Unnamed speaker · 59:19
  • “There is no immune response to prions. The body recognizes them as a protein.”
    Unnamed speaker · 1:08:10
  • “I think we're seeing especially in eastern whitetail deer populations, that trajectory push a little quicker than we may have thought.”
    Unnamed speaker · 1:20:42
  • “If CWD deer are easier to do, they're easier to get.”
    Steven Rinella · 1:46:43
  • “The risk to humans from consuming a CWD infected deer is pretty low.”
    Unnamed speaker · 2:05:29
  • “We don't know. We don't.”
    Unnamed speaker · 2:05:42
  • “We shouldn't shy away from good deer management for fear of something that's not yet happened.”
    Unnamed speaker · 1:53:33
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  • Boost Mobile 2:11:06–2:11:30

About this episode

Steven Rinella talks with director of the Missouri Department of Conservation, Jason Sumners, about: honest updates on the state of chronic wasting disease in America; managing deer herds; what other states can learn from Missouri; keeping hunters at the core of conservation; whether we might be seeing the end of big bucks; and more! Follow Jason Sumners on Instagram: @huntmo_jason https://www.instagram.com/huntmo_jason/ Connect with Steve https://www.themeateater.com/authors/steven-rinella and The MeatEater Podcast Network https://www.youtube.com/@MeatEaterPodcastNetwork Steve on Instagram https://www.instagram.com/stevenrinella and Twitter https://twitter.com/stevenrinella?lang=en MeatEater on Instagram https://www.instagram.com/meateater, Facebook https://www.facebook.com/StevenRinellaMeatEater/, Twitter https://twitter.com/MeatEaterTV?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Eauthor, and YouTube https://www.youtube.com/@MeatEaterPodcastNetwork See omnystudio.com/listener https://omnystudio.com/listener for privacy information.

Transcript

0:00
2:02:48

22,626 words · 8 speakers

Speaker names marked are inferred from speaking time and the show’s known hosts — they are not voice-verified.

Topics

  • CWD
  • Missouri
  • EHD
  • Wisconsin
  • Colorado
  • New York
  • Ford
  • Alaska
  • Ohio
  • Wyoming

Page updated · transcript and summary are machine-generated