The incident ran from September 25 through September 30, with 59 horses captured, 12 shipped, 26 released and one dead.
The capture and removal goals were 122 and 24, respectively.
There were 20 unaccounted-for animals.
The death rate was 1.7%.
The capture total included 14 stallions, 39 mares and 6 foals.
Youngsters represented 10.2% of the animals gathered, consistent with a herd growth rate of 5% per year.
Land managers often use growth rates of fifteen to twenty percent per year to predict herd sizes and management actions.
Of the adults, 26.4% were male and 73.6% were female, outside the expected range of variation of a simple random process with p-bar = .5 and n = 53 adults.

Put differently, the percentages of stallions and mares don’t look like they came from a population with 50% males / 50% females.
Abnormal sex ratios are commonly found in herds treated with Zonastat-H, a fertility control pesticide favored by most wild horse advocates.
But the BLM has been treating the Desatoya mares with GonaCon Equine, a fertility control pesticide that may act as a sterilant.
The gather page says 33 mares were treated and 12 were released.
If the mare that died on Day 5 had been treated before the injury occurred, 20 mares could still be in the pen awaiting a second dose, which must be given at least 90 days after the first according to the 2017 labeling amendment.

A shorter interval would constitute unlawful use of the pesticide.
The roundup was billed as catch-treat-release.
The HMA is managed primarily for animal agriculture.
RELATED: Desatoya Roundup Announced.
