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Floater mortality within settlement areas can explain the Allee effect in breeding populations

Author

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  • Penteriani, Vincenzo
  • Otalora, Fermín
  • Ferrer, Miguel

Abstract

The Allee effect (the positive relationship between population growth rate and population size) is a constraint of some animal populations at low numbers, which increases their likelihood of extinction because of a decrease in reproduction and/or survival. We were able to demonstrate that the Allee effect can be the result of a mortality increase affecting floaters (i.e. dispersing individuals able to enter as breeders in the reproductive population when a breeding territory or a potential mate – owner of a suitable breeding territory – becomes available). Previously, potential mechanisms underlying Allee effects were always related to the breeding portion of a population only. In contrast, our understanding of or solutions to population declines due to the Allee effects can reside elsewhere, away from breeding territories.

Suggested Citation

  • Penteriani, Vincenzo & Otalora, Fermín & Ferrer, Miguel, 2008. "Floater mortality within settlement areas can explain the Allee effect in breeding populations," Ecological Modelling, Elsevier, vol. 213(1), pages 98-104.
    • Handle: RePEc:eee:ecomod:v:213:y:2008:i:1:p:98-104
    DOI: 10.1016/j.ecolmodel.2007.11.009
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