Trade-off between r -selection and K -selection in Drosophila populations
Open Access
- 1 February 1981
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 78 (2) , 1303-1305
- https://doi.org/10.1073/pnas.78.2.1303
Abstract
Density-dependent genetic evolution was tested in experimental populations of D. melanogaster subject for 8 generations to natural selection under high (K-selection) or low (r-selection) population density regimes. The test consisted of determining at high and at low densities the per capita rate of population growth of the selected populations. At high densities, the K-selected populations showed a higher per capita rate of population growth than did the r-selected populations, but the reverse was true at low densities. These results corroborate the predictions derived from formal models of density-dependent selection. No evidence of a trade-off in per capita rate of growth was observed in 25 populations of D. melanogaster, each homozygous for a different 2nd chromosome sampled from a natural population.This publication has 5 references indexed in Scilit:
- Selection and the r/K Continuum in Experimental Populations of ProtozoaThe American Naturalist, 1979
- r and K Selection in Experimental Populations of Escherichia coliScience, 1978
- The Implications of Density-Dependent Population Growth for Frequency- and Density-Dependent SelectionThe American Naturalist, 1976
- Competition between species: Theoretical models and experimental testsTheoretical Population Biology, 1973