Haldane 1937

Citation

Haldane, J. B. S. (1937). The effect of variation of fitness. The American Naturalist, 71(735), 337-349.

Links

https://www.journals.uchicago.edu/doi/abs/10.1086/280722

https://www.jstor.org/stable/2457289

Notes

Paragraph One

Haldane points out the distinction between Darwinian evolution (novel adaptation) and stabilizing selection (or purifying selection or "maintenance" selection).

Paragraph Two

The change in frequency of alleles resulting in novel adaptation can be very slow in terms of a human lifetime; however, extremely fast on a geologic timescale. Very small fitness differences in numbers of offspring could be virtually impossible to detect by direct observation yet have a very real evolutionary effect.

Terms

Facies - appearance. https://en.wiktionary.org/wiki/facies