Pregnancy Determination in Uncaptured Feral Horses
Turner JW, Lasley BL, Kasman L, Kirkpatrick JF. 1988. Pregnancy Determination in Uncaptured Feral Horses. The Journal of Wildlife Management. 52(2):305-308
The urinary excretion of estrone sulfate by 25 free-roaming feral horses (Equus caballus) was measured by radioimmunoassay applied to extracts of urine-soaked soil. Twelve of 15 mares having concentrations >1.0 μg/mg creatinine (x̄ = 2.64 ± 1.02 [SD]) produced foals. All 10 mares with concentrations <1.0 μg/mg creatinine (x̄ = 0.44 ± 0.26) did not foal. Extracting urine from soil and measuring and creatinine can be used to determine pregnancy in free-roaming feral horses without the stress of capture or immobilization.
- Type
- Journal Article
- Authors
- Turner, J.; Lasley, B.; Kasman, L.; Kirkpatrick, Jay
- Units
- ASIS
- Keywords
- feral horses, pregnancy determination, wildlife contraception