Case studies in wildlife immunocontraception: Wild and feral equids and white-tailed deer

J. F. Kirkpatrick, J. W. Turner, Irwin Liu, R. Fayrer-Hosken, A. T. Rutberg

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Non-lethal management methods are required for wild equids that are protected by law and for deer inhabiting areas where lethal controls are not legal or safe. Single or multiple inoculations of porcine zona pellucida (PZP) vaccine have been delivered to wild horses and deer by means of darts. Contraceptive efficacy in horses after two inoculations ranged from 90% to 100%, and after a single inoculation ranged from 19% to 28%. Mares given a controlled-release form of the vaccine had foaling rates ranging from 7% to 20%. No detectable changes in social organization or behaviours among treated horses occurred. Contraceptive effects were reversible after 4 consecutive years of treatment but 5-7 years of treatment resulted in ovulation failure and decreased urinary oestrogen concentrations. Among deer, two inoculations were 70-100% effective in preventing fawns, but one inoculation yielded a contraceptive efficacy of ≤20%, with pregnancies occurring late in the breeding season; a single annual booster inoculation reduced fertility to 20% in the second year. Energy costs of extended breeding seasons were less than those resulting from pregnancy. After two years of treatment, ovaries appeared normal. These studies suggest that PZP immunocontraception can be successfully applied to certain free-roaming populations of wild horses and deer.

Original languageEnglish (US)
Pages (from-to)105-110
Number of pages6
JournalReproduction, Fertility and Development
Volume9
Issue number1
DOIs
StatePublished - Apr 22 1997

Fingerprint

Immunologic Contraception
immunocontraception
Deer
Odocoileus virginianus
Horses
wildlife
Contraceptive Agents
vaccination
case studies
Zona Pellucida
deer
Breeding
horses
contraceptives
Swine
Vaccines
zona pellucida
Pregnancy
breeding season
Ovulation

ASJC Scopus subject areas

  • Biotechnology
  • Reproductive Medicine
  • Molecular Biology
  • Animal Science and Zoology
  • Genetics
  • Endocrinology
  • Developmental Biology

Cite this

Case studies in wildlife immunocontraception : Wild and feral equids and white-tailed deer. / Kirkpatrick, J. F.; Turner, J. W.; Liu, Irwin; Fayrer-Hosken, R.; Rutberg, A. T.

In: Reproduction, Fertility and Development, Vol. 9, No. 1, 22.04.1997, p. 105-110.

Research output: Contribution to journalArticle

Kirkpatrick, J. F. ; Turner, J. W. ; Liu, Irwin ; Fayrer-Hosken, R. ; Rutberg, A. T. / Case studies in wildlife immunocontraception : Wild and feral equids and white-tailed deer. In: Reproduction, Fertility and Development. 1997 ; Vol. 9, No. 1. pp. 105-110.
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