Activity and space use by degus: A trade-off between thermal conditions and food availability?

Leonardo D. Bacigalupe, Enrico L. Rezende, G. J. Kenagy, Francisco Bozinovic

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

We analyzed the influence of environmental temperature (open versus shaded habitat) and experimental food availability on surface activity of the degu (Octodon degus), a day-active herbivorous rodent that inhabits central Chile. We manipulated food availability and compared open and shaded study plots to determine the influence of thermal conditions on aboveground activity. Degus displayed a bimodal pattern of daily activity during relatively warmer thermal conditions in the austral autumn, whereas activity was unimodal during colder conditions in winter. However, they had a unimodal activity pattern under warm conditions in the shade when food availability was artificially enhanced in autumn. We observed more animals active in the plots where food was supplemented under all conditions. Our results illustrate spatial and temporal shifts in activity of degus involving a trade-off based on avoidance of exposure to heat and the search for food.

Original languageEnglish
Pages (from-to)311-318
Number of pages8
JournalJournal of Mammalogy
Volume84
Issue number1
DOIs
Publication statusPublished - Feb 2003

Keywords

  • Activity
  • Behavioral decisions
  • Chilean matorral
  • Food availability
  • Octodon degus
  • Space use
  • Temperature

ASJC Scopus subject areas

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

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