Population dynamics of American horseshoe crabs—historic climatic events and recent anthropogenic pressures

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • Søren Faurby, Danmark
  • Tim L. King, U.S. Geological Survey—Biological Resources Division, USA
  • Matthias Obst, University of Gothenburg, Sverige
  • Eric M. Hallerman, Virginia Polytechnic Institute and State University, USA
  • Cino Pertoldi
  • Peter Funch
  • Genetik og Økologi, Biologisk Institut
Populations of the American horseshoe crab, Limulus polyphemus, have declined, but neither the causes nor the magnitude are fully understood. In order to evaluate historic demography, variation at 12 microsatellite DNA loci surveyed in 1218 L. polyphemus sampled from 28 localities was analysed with Bayesian coalescent-based methods. The analysis showed strong declines in population sizes throughout the species’ distribution except in the geographically isolated southern-most population in Mexico, where a strong increase in population size was inferred. Analyses suggested that demographic changes in the core of the distribution occurred in association with the recolonization after the Ice Age and also by anthropogenic effects, such as the past overharvest of the
species for fertilizer or the current use of the animals as bait for American eel (Anguilla rostrata) and whelk (Busycon spp.) fisheries. This study highlights the importance of considering both climatic changes and anthropogenic effects in efforts to understand population dynamics—a topic which is highly relevant in the ongoing assessments of the
effects of climate change and overharvest.
OriginalsprogEngelsk
TidsskriftMolecular Ecology
Vol/bind19
Sider (fra-til)3088–3100
ISSN0962-1083
DOI
StatusUdgivet - 2010

    Forskningsområder

  • Dolkhaler, Limulus

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