Wildlife Investments
Wild Deer Culling Research pt.2 - The Comanche Ranch Study
July 29 · 1 hr 5 min · Season 1 · Episode 17 · 47.3 MB
0:00-1:05:45
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We're picking up where our last episode left off on the topic of deer culling for genetic improvement. Donnie Draeger is joining us to discuss the iconic Comanche Ranch high-fence culling study that went to even greater extremes to test whether deer herd population genetics can be improved. He and Bronson discuss the logistics of conducting a study of this scale, the results, and what contributed to the challenges they face in improving genetic quality of bucks.
You can read more on the the actual study here: https://wildlife.onlinelibrary.wiley.com/doi/pdfdirect/10.1002/wmon.70013
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- 0:02Intro & Guest Welcome
- 1:04Part 1 Recap & Study Goals
- 3:18How the Comanche Ranch Study Was Born
- 4:47Eagle Pass vs. Kingsville: Habitat & Rainfall
- 9:53Study Design: Three Treatments Explained
- 15:27Helicopter Capture vs. Hunter Harvest
- 22:27What Success Should Look Like: The Theory
- 25:21The Results: No Genetic Change
- 29:58The Negative Feedback Loop & Near-Buck Extinction
- 40:02How Often Do Bucks Switch Cull Status?
- 44:40Why It Failed: Heritability, Rainfall & the Doe Problem
- 50:36Breeding Value: The Scatter Plot That Changes Everything
- 59:14Why Some Ranches Still Appear to Succeed
- 1:03:09Closing & Preview of Part 3
- 1:05:24Outro