Definition for Allee effect
From Biology Forums Dictionary
The phenomenon that some individuals will fail to mate successfully purely by chance, for example, because of the failure to find a mate.
Component Allee effect is the positive relationship between any measurable component of individual fitness and population density.
Demographic Allee effect is the positive relationship between the overall individual fitness and population density.
Strong Allee effect is a demographic Allee effect with a critical population size or density
Weak Allee effect is a demographic Allee effect without a critical population size or density
