期刊
THEORETICAL POPULATION BIOLOGY
卷 70, 期 3, 页码 244-254出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.tpb.2006.06.009
关键词
Allee effect; integrodifference equation; wolf recolonization; pair formation; spread rate; component Allee effect
A reduced probability of finding mates at low densities is a frequently hypothesized mechanism, for a component Allee effect. At low densities dispersers are less likely to find mates and establish new breeding units. However, many mathematical models for an Allee effect do not make a distinction between breeding group establishment and subsequent population growth. Our objective is to derive a spatially explicit mathematical model, where dispersers have a reduced probability of finding mates at low densities, and parameterize the model for wolf recolonization in the Greater Yellowstone Ecosystem (GYE). In this model, only the probability of establishing new breeding units is influenced by the reduced probability of finding mates at low densities. We analytically and numerically solve the model to determine the effect of a decreased probability in finding mates at low densities on population spread rate and density. Our results suggest that a reduced probability of finding mates at low densities may slow recolonization rate. (c) 2006 Elsevier Inc. All rights reserved.
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