Frequency and density-dependent selection on life-history strategies--a field experiment.

ABSTRACT: Negative frequency-dependence, which favors rare genotypes, promotes the maintenance of genetic variability and is of interest as a potential explanation for genetic differentiation. Density-dependent selection may also promote cyclic changes in frequencies of genotypes. Here we show evidence for both density-dependent and negative frequency-dependent selection on opposite life-history tactics (low or high reproductive effort, RE) in the bank vole (Myodes glareolus). Density-dependent selection was evident among the females with low RE, which were especially favored in low densities. Instead, both negative frequency-dependent and density-dependent selection were shown in females with high RE, which were most successful when they were rare in high densities. Furthermore, selection at the in

SUBMITTER: Mappes T 

PROVIDER: S-EPMC2246017 | biostudies-literature | 2008 Feb

REPOSITORIES: biostudies-literature