Present address, INRA Zoologie Forestière, Avenue de la Pomme de Pin, Ardon, 45166 Olivet, France.
Dispersion in time and space affect mating success and Allee effects in invading gypsy moth populations
Article first published online: 28 JUN 2008
© 2008 The Authors. Journal compilation © 2008 British Ecological Society
Journal of Animal Ecology
Volume 77, Issue 5, pages 966–973, September 2008
How to Cite
Robinet, C., Lance, D. R., Thorpe, K. W., Onufrieva, K. S., Tobin, P. C. and Liebhold, A. M. (2008), Dispersion in time and space affect mating success and Allee effects in invading gypsy moth populations. Journal of Animal Ecology, 77: 966–973. doi: 10.1111/j.1365-2656.2008.01417.x
- Issue published online: 13 AUG 2008
- Article first published online: 28 JUN 2008
- Received 5 February 2008; accepted 20 March 2008; Handling Editor: Mike Boots
- expanding populations;
- isolated colonies;
- Lymantria dispar;
- stochastic diffusion model
- 1Understanding why invading populations sometimes fail to establish is of considerable relevance to the development of strategies for managing biological invasions.
- 2Newly arriving populations tend to be sparse and are often influenced by Allee effects. Mating failure is a typical cause of Allee effects in low-density insect populations, and dispersion of individuals in space and time can exacerbate mate-location failure in invading populations.
- 3Here we evaluate the relative importance of dispersal and sexual asynchrony as contributors to Allee effects in invading populations by adopting as a case study the gypsy moth (Lymantria dispar L.), an important insect defoliator for which considerable demographic information is available.
- 4We used release–recapture experiments to parameterize a model that describes probabilities that males locate females along various spatial and temporal offsets between male and female adult emergence.
- 5Based on these experimental results, we developed a generalized model of mating success that demonstrates the existence of an Allee threshold, below which introduced gypsy moth populations are likely to go extinct without any management intervention.