Allee effects and their potential relevance to exploited abalone populations
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2007
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University of Cape Town
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Abstract
The Allee effect refers to the per capita growth rate of a population r (i.e. the increase in population size per individual present) and how this property changes at low population sizes. As a population is reduced below it’s carrying capacity, it is generally assumed that r will increase. However at very low levels, further reductions in population size may lead to decreases in r, so that recovery of the population is impeded. This is the Allee effect. In extreme cases r may even become negative, leading to population collapse.
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De Decker, M., Edwards, C., & Butterworth, D. (2007). Allee effects and their potential relevance to exploited abalone populations. MARAM: University of Cape Town.