If you need an accessible version of this item please contact JSTOR User Support

Allee Effect and Population Dynamics in the Glanville Fritillary Butterfly

Mikko Kuussaari, Ilik Saccheri, Mark Camara and Ilkka Hanski
Oikos
Vol. 82, No. 2 (Jun., 1998), pp. 384-392
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3546980
Stable URL: http://www.jstor.org/stable/3546980
Page Count: 9
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Allee Effect and Population Dynamics in the Glanville Fritillary Butterfly
Preview not available

Abstract

The Allee effect - a decrease in population growth rate at low density - may be produced by several mechanisms including difficulty in finding mates at low densities. We present evidence for the Allee effect in natural populations of an endangered butterfly, the Glanville fritillary (Melitaea cinxia) and for two mechanisms that cause it. Specifically, we show that emigration rate increases and the fraction of mated females decreases with decreasing local density. We then demonstrate a connection between mating success and population growth rate and more generally, slightly reduced reproductive success in the smallest butterfly populations in an extensive data set gathered over four years. The Allee effect increases the significance of the rescue effect in metapopulations, and thereby the potential for alternative stable states in metapopulation as well as in local dynamics.

Page Thumbnails

  • Thumbnail: Page 
384
    384
  • Thumbnail: Page 
385
    385
  • Thumbnail: Page 
386
    386
  • Thumbnail: Page 
387
    387
  • Thumbnail: Page 
388
    388
  • Thumbnail: Page 
389
    389
  • Thumbnail: Page 
390
    390
  • Thumbnail: Page 
391
    391
  • Thumbnail: Page 
392
    392