Black Mountain Roundup Day 18

The incident began on May 2.  Gather stats through May 19:

  • Target: Burros
  • Type: Planned
  • Method: Helicopter
  • Captured: 844, up from 710 on Day 15
  • Average daily take: 46.9
  • Capture goal: 1,080
  • Removal goal: 1,080
  • Returned: None
  • Deaths: None
  • Shipped: 796, up from 630 on Day 15

The cumulative total includes 322 jacks, 425 jennies and 97 foals, based on figures in the daily reports.  The breakdown at the gather page is 323, 423 and 98.

Youngsters represented 11.5% of the animals captured.  Of the adults, 43.1% were male and 56.9% were female.

The herd can’t be growing at a rate of 20% per year with a birth rate of 12% per year.

The percentage of foals has been going down as the number of animals caught goes up.

The percentages of males and females are still outside calculated limits of variation for a simple random process centered at p-bar = .5 (50% males / 50% females) and a sample size of n = 747 adults.

How to Compute p-chart Limits 02-10-22

Abnormal sex ratios are not uncommon in herds treated with the Montana Solution.

No PZP jennies have been reported since Day 6.

The location of the trap site within the HMA was not given.

Black Mountain HMA Map 02-25-22

Day 18 ended with 48 unaccounted-for animals.

The number of animals taken off the range is 844 and the removal goal is 78% complete.

Other statistics:

  • AML: 478
  • Forage assigned to burros: 2,868 AUMs per year
  • Pre-gather population: 3,000
  • Forage liberated to date: 5,064 AUMs per year
  • Water liberated to date: 4,222 gallons per day
  • Forage assigned to livestock: 7,333 AUMs per year (estimated)
  • Burros displaced from HMA by permitted grazing: 1,222
  • True AML: 1,700
  • Stocking rate at new AML: 1.7 burros per thousand acres
  • Burros displaced from HMA by drilling and mining: Ask the advocates

RELATED: Black Mountain Roundup Day 15.

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