Competitive interactions between Microtus californicus and Reithrodontomys megalotis during two peaks of Microtus abundance.

Edward Heske, R. S. Ostfeld, W. Z. Lidicker

Research output: Contribution to journalArticlepeer-review

Abstract

Reithrodontomys increased in abundance on four permanently established grids during years of low Microtus density but declined to very low numbers or local extinction when vole populations irrupted. The annual spring decline in abundance of harvest mice also occurred 3-4 months earlier in the year when vole numbers were rapidly increasing. Reproductive activity was seasonally complementary in the 2 species. Data support the hypothesis that interference between Microtus and Reithrodontomys may be relaxed during most years. Behavioral interactions intensity when Microtus density increases, however, and interspecific competition during vole irruptions is severe. -from Authors

Original languageEnglish (US)
Pages (from-to)271-280
Number of pages10
JournalJournal of Mammalogy
Volume65
Issue number2
DOIs
StatePublished - Jan 1 1984

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Animal Science and Zoology
  • Genetics
  • Nature and Landscape Conservation

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