Conservation Genetics

, Volume 11, Issue 1, pp 89–101 | Cite as

Fine-scale genetic structure in Ethiopian wolves imposed by sociality, migration, and population bottlenecks

  • Deborah A. Randall
  • John P. Pollinger
  • Kifle Argaw
  • David W. Macdonald
  • Robert K. Wayne
Research Article

Abstract

We used demographic, spatial, and microsatellite data to assess fine-scale genetic structure in Ethiopian wolves found in the Bale Mountains and evaluated the impact of historical versus recent demographic processes on genetic variation. We applied several analytical methods, assuming equilibrium and nonequilibrium conditions, to assess demography and genetic structure. Genetic variation (HE = 0.584–0.607, allelic richness = 4.2–4.3) was higher than previously reported for this species and genetic structure was influenced by geography and social structure. Statistically significant FST values (0.06–0.08) implied differentiation among subpopulations. STRUCTURE analyses showed that neighbouring packs often have shared co-ancestry and spatial autocorrelation showed higher genetic similarity between individuals within packs and between individuals in neighbouring packs compared to random pairs of individuals. Recent effective population sizes were lower than 2n (where n is the number of packs) and lower than the number of breeding individuals with Ne/N ratios near 0.20. All subpopulations have experienced bottlenecks, one occurring due to a rabies outbreak in 2003. Nevertheless, differentiation among these subpopulations is consistent with long-term migration rates and fragmentation at the end of the Pleistocene. Enhanced drift due to population bottlenecks may be countered by higher migration into disease-affected subpopulations. Contemporary factors such as social structure and population bottlenecks are clearly influencing the level and distribution of genetic variation in this population, which has implications for its conservation.

Keywords

Dispersal Genetic drift Microsatellites Disease Canid conservation 

Supplementary material

10592_2009_5_MOESM1_ESM.doc (231 kb)
(DOC 231 kb)

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Deborah A. Randall
    • 1
    • 4
  • John P. Pollinger
    • 2
  • Kifle Argaw
    • 3
  • David W. Macdonald
    • 1
  • Robert K. Wayne
    • 2
  1. 1.Department of Zoology, Wildlife Conservation Research UnitUniversity of OxfordTubneyUK
  2. 2.Department of Ecology and Evolutionary BiologyUniversity of California, Los AngelesLos AngelesUSA
  3. 3.Ethiopian Wildlife Conservation AuthorityAddis AbabaEthiopia
  4. 4.Frankfurt Zoological SocietyAddis AbabaEthiopia

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