Understanding variation in autumn migration of northern white-tailed deer by long-term study

John Fieberg, David W. Kuehn, Glenn D. Delgiudice

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Much of our present knowledge of mixed migration strategies of northern populations of white-tailed deer (Odocoileus virginianus) comes from short-term studies, which limits the observed variation of winter severity and thus our understanding of its potential influence on the migration behavior of study cohorts. From 1991 to 2006, we assessed the incidence of autumn migratory versus nonmigratory behavior of 335 adult (>1.0 year old) females, what proportion were conditional versus obligate migrators, the importance of winter severity as a factor affecting the migratory response, and the effect of winter severity and study length on the classification of deer as conditional or obligate migrators and composition of study populations. Annual winter conditions ranged from historically mild to severe. The annual estimated proportion of deer migrating from spring-summer-autumn range to winter range was positively related to winter severity, and the cumulative probability of deer migrating tracked accumulating snow depths as winters progressed. However, the relationship was highly variable, largely attributable to the annual variation in migratory behavior of individuals radiomonitored for 2-7 years. Importantly, because of the variability of autumn-winter weather conditions, we noted that the proportion of deer we classified as obligate migrators was inversely related to the number of years individuals were monitored. Further, the composition (nonmigratory, conditional, and obligate migrators) of the study cohort was strongly influenced by the severity of winter conditions in the year of capture, as well as in subsequent winters of monitoring.

Original languageEnglish (US)
Pages (from-to)1529-1539
Number of pages11
JournalJournal of Mammalogy
Volume89
Issue number6
DOIs
StatePublished - Dec 1 2008

Keywords

  • Autumn migration
  • Interval-censored
  • Long-term study
  • Migration
  • Odocoileus virginianus
  • White-tailed deer
  • Winter severity

Fingerprint Dive into the research topics of 'Understanding variation in autumn migration of northern white-tailed deer by long-term study'. Together they form a unique fingerprint.

  • Cite this