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. 1997 Jul 22;94(15):7742-7.
doi: 10.1073/pnas.94.15.7742.

A demographic approach to selection

W W Anderson  1 , T K Watanabe
Affiliations

A demographic approach to selection

W W Anderson et al. Proc Natl Acad Sci U S A. .

Abstract

The concepts of demography provide a means of combining the ecological approach to population growth with the genetical approach to natural selection. We have utilized the demographic theory of natural selection developed by Norton and Charlesworth to analyze life history schedules of births and deaths for populations of genotypes in Drosophila pseudoobscura. Our populations illustrate a stable genetic equilibrium, an unstable genetic equilibrium, and a case of no equilibrium. We have estimated population growth rates and Darwinian fitnesses of the genotypes and have explored the role of population growth in determining natural selection. The age-specific rates of births and deaths provide insights into components of selection. Both viability and fertility are important components in our populations.

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Figures

Figure 1
Figure 1
The reproductive function V(x) = l(x) m(x) for karyotypes bearing AR and CH chromosomes from Pinon Flats, CA. Experimental conditions were nearly optimal.
Figure 2
Figure 2
The reproductive functions V(x) = l(x) m(x) for karyotypes bearing AR and PP chromosomes from Black Forest, CO. Experimental conditions were nearly optimal.
Figure 3
Figure 3
The reproductive functions V(x) = l(x) m(x) for karyotypes bearing AR and ST chromosomes from Mather, CA. Experimental conditions were harsh.
See this image and copyright information in PMC

References

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