Frequency and Density-Dependent Selection on Life-History Strategies – A Field Experiment

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Frequency and Density-Dependent Selection on Life-History Strategies – A Field Experiment

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dc.contributor.author Mappes, Tapio en_GB
dc.contributor.author Koivula, Minna en_GB
dc.contributor.author Koskela, Esa en_GB
dc.contributor.author Oksanen, Tuula A. en_GB
dc.contributor.author Savolainen, Tiina en_GB
dc.contributor.author Sinervo, Barry en_GB
dc.contributor.author Tregenza, Tom en_GB
dc.contributor.department University of Exeter en_GB
dc.date.accessioned 2008-09-28T22:01:36Z en_GB
dc.date.accessioned 2011-01-25T11:47:13Z en_US
dc.date.accessioned 2013-03-20T14:50:05Z
dc.date.issued 2008-02-27 en_GB
dc.description.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 individual level affected the frequencies of tactics at the population level, so that the frequency of the rare high RE tactic increased significantly at high densities. We hypothesize that these two selection mechanisms (density- and negative frequency-dependent selection) may promote genetic variability in cyclic mammal populations. Nevertheless, it remains to be determined whether the origin of genetic variance in life-history traits is causally related to density variation (e.g. population cycles). en_GB
dc.identifier.citation PLoS ONE 2008 3(2) en_GB
dc.identifier.doi 10.1371/journal.pone.0001687 en_GB
dc.identifier.uri http://hdl.handle.net/10036/38257 en_GB
dc.language.iso en en_GB
dc.publisher Public Library of Science en_GB
dc.rights Mappes et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_GB
dc.title Frequency and Density-Dependent Selection on Life-History Strategies – A Field Experiment en_GB
dc.type Article en_GB
dc.date.available 2008-02-27 en_GB
dc.date.available 2008-09-28T22:01:36Z en_GB
dc.date.available 2011-01-25T11:47:13Z en_US
dc.date.available 2013-03-20T14:50:05Z
dc.identifier.issn 1932-6203 en_GB
dc.identifier.journal PLoS ONE en_GB
dc.identifier.pmcid 2246017 en_GB
dc.identifier.pmid 18301764 en_GB


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