. "A demographic approach to selection." (NAS Colloquium) Genetics and the Origin of Species: From Darwin to Molecular Biology 60 Years After Dobzhansky. Washington, DC: The National Academies Press, 1997.
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Proceedings of the National Academy of Sciences of the United States of America
of known fitness differences among the lines, whereas population growth rates at high densities were not.
One of the strong points of estimating fitnesses from life history tables is the focus it gives to female fecundity and, in particular, to the age at which offspring are produced. Unfortunately, our life history tables do not include male mating success, and this omission is a weakness of our approach. We can imagine experiments in which a life history table of longevity and male reproductive success would be generated and then utilized with the female life history table to generate fitness estimates. Such experiments would be difficult to carry out. We believe that the analysis we have presented, although not complete, is a step in the right direction of a demographic approach to fitness and to natural selection.
We thank Drs. Richard Nickerson and Marvin Druger for generously providing us their l(x) and m(x) data on AR/AR, AR/CH, and CH/CH karyotypes, and Dr. Margaret Anderson for help with the calculations. We thank Drs. Daniel Promislow, Mohamed Noor, and Laurence Mueller for their comments on the manuscript, and Dr. Brian Charlesworth for comments on an earlier version.
1. Dobzhansky, T. (1937) Genetics and the Origin of Species (Columbia Univ. Press, New York).
2. Dobzhansky, T. (1970) Genetics of the Evolutionary Process (Columbia Univ. Press, New York).