Triple B Roundup, Day 17

The incident began on July 17.  Gather stats through August 2:

  • Target: Horses
  • Type: Planned
  • Method: Helicopter
  • Category: Cruel and costly
  • Captured: 647, up from 552 on Day 15
  • Average daily take: 38.1
  • Capture goal: 1,900
  • Removal goal: 1,800
  • Returned: None, no change from Day 15
  • Deaths: 14, up from 13 on Day 15
  • Shipped: 554, up from 473 on Day 15

The figures above are based on the daily reports.

A filly was euthanized on Day 17 due to weak tendons.

The death rate is 2.2%.

The capture total includes 232 stallions, 304 mares and 111 foals.

Youngsters represented 17.2% of the animals gathered.

Of the adults, 43.3% were male and 56.7% were female.

The herd can’t be growing at a rate of 20% per year with a birth rate of 17% per year.

A better estimate would be 12% per year, assuming a death rate of 5% per year.

The observed percentages of stallions and mares could not be produced by a simple random process centered at 50% males / 50% females (p-bar = .5, n = 536 adults).

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

Abnormal sex ratios are often found in herds subject to the Montana Solution but not double-digit birth rates.

Body condition scores were not given.

The location of the trap was not disclosed.

The Complex and surrounding lands are subject to permitted grazing.

Triple B Complex Map 07-11-22

Day 17 ended with 79 unaccounted-for animals.

Mares treated with fertility control may be returned to the area at a later date.

Other statistics:

  • Horses allowed by plan (AML): 821
  • Forage assigned to horses: 9,852 AUMs per year
  • Pre-gather population: 3,475
  • Forage liberated to date: 7,764 AUMs per year
  • Water liberated to date: 6,470 gallons per day
  • Forage assigned to livestock: 49,188 AUMs per year (estimated)
  • Horses displaced from Complex by permitted grazing: 4,099
  • True AML: 4,911
  • Stocking rate at new AML: 3.0 horses per thousand acres
  • Horses displaced from Complex by drilling and mining: Ask the advocates

RELATED: Triple B Roundup, Day 15.

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