Experimental translocation of juvenile water voles in a Scottish lowland metapopulation

Diana O. Fisher, Xavier Lambin, Sonja M. Yletyinen

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Population density affects dispersal success because residents can hinder or facilitate immigration into a new site, via a "social fence effect" or "social attraction" (or "conspecific attraction"), respectively. These mechanisms can affect the dynamics of fragmented populations and the success of translocations. However, information on the settlement behaviour of dispersers is rare. We conducted a manipulative field experiment using wild water voles, which exist in metapopulations along waterways in Scotland. We translocated 17 young of dispersal age into either an occupied site or a vacant site containing good habitat, which had recently become extinct due to a feral predator (American mink) moving through. We monitored the movements of translocated voles using radio telemetry. Translocated voles were less likely to settle in occupied sites with higher densities of residents, suggesting a possible social fence effect at high density. There was evidence of a social attraction mechanism, because voles never remained at new sites unless another individual arrived soon after translocation, and they were more likely to settle in occupied or colonised sites than vacant ones. Voles remained in the transient phase of dispersal for many days, and often followed a "stepping stone" trajectory, stopping for several days at successive sites. We suggest that trajectories followed by dispersing water voles, the time scale and long dispersal distances found in this species are conducive to locating conspecifics at low density and colonising vacant habitat. These results are encouraging for prospects of metapopulation persistence and future translocation success.

Original languageEnglish
Pages (from-to)289-295
Number of pages7
JournalPopulation Ecology
Volume51
Issue number2
DOIs
Publication statusPublished - Apr 2009

Keywords

  • Dispersal
  • Immigration
  • Metapopulation dynamics
  • Social fence
  • Translocation
  • Water vole
  • CONSPECIFIC ATTRACTION
  • CONSERVATION BIOLOGY
  • ARVICOLA-TERRESTRIS
  • MICROTUS-OECONOMUS
  • NATAL DISPERSAL
  • POPULATION
  • HABITAT
  • COLONIZATION
  • IMMIGRATION
  • DEMOGRAPHY
  • Dispersal
  • Immigration
  • Metapopulation dynamics
  • Social fence
  • Translocation
  • Water vole

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