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Allee Effects in Ecology and Conservation$
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Franck Courchamp, Ludek Berec, and Joanna Gascoigne

Print publication date: 2008

Print ISBN-13: 9780198570301

Published to Oxford Scholarship Online: May 2008

DOI: 10.1093/acprof:oso/9780198570301.001.0001

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Conservation and management

Conservation and management

(p.160) 5. Conservation and management
Allee Effects in Ecology and Conservation

Franck Courchamp

Luděk Berec

Joanna Gascoigne

Oxford University Press

This chapter deals with the more applied aspects of the Allee effect. It starts by considering the role and impact of Allee effects in the conservation of rare and endangered populations, including their interaction with habitat fragmentation and reserve design, (re)introductions, ex-situ conservation, and conservation target setting. It then considers Allee effects in the context of population management, including the management of exploited populations (fisheries, the economics of value and rarity), and pest outbreaks and eradication. It reviews methods that managers and conservationists might use for evaluating Allee effects in a population, including scientifically rigorous techniques for demonstrating their presence and calculating the Allee threshold, but also more general precautionary-type strategies for assessing the probability of Allee effects being present. The chapter ends by summarizing key points as a sort of Allee effect aide-mémoire for endangered species and conservation management.

Keywords:   endangered, rare, fragmentation, reserve, exploitation, pest outbreak, biological control, introduction, reintroduction

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