Selection and Numbers in Models of Life Histories
In integrating the models of population genetics and population dynamics, the main avenue opened is for models of the evolution of the ecological parameters determining the dynamics of a population. The first effort in this direction is perhaps that of MacArthur (1962). Coming from ecology, he based himself upon the familiar logistic equation. His supposition is that the fitness of population genetics and the r of the logistic equation refer to the same quantity. MacArthur proposes another population genetics, where fitness would be K. The substance of MacArthur’s article is repeated in Chapter 7 of MacArthur and Wilson’s The Theory of Island Biogeography (1967). The model of MacArthur and Wilson compares genes to species, though it can be doubted whether this a legitimate approach. Moreover, it is not at all clear that the verbal description of r- and K-selection in Chapter 7 is consistent with the bit of model presented.
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