11132410

Source:http://linkedlifedata.com/resource/pubmed/id/11132410

Download in:

Switch to

Custom View

Named Graph Language Inference

Statements in which the resource exists as a subject.
Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0015219, umls-concept:C0016163, umls-concept:C0032683, umls-concept:C0036576, umls-concept:C0328604, umls-concept:C1257890, umls-concept:C1517004
pubmed:issue	2
pubmed:dateCreated	2000-12-29
pubmed:abstractText	Group selection has historically been an important and controversial subject in evolutionary biology. There is now a compelling body of evidence, both theoretical and experimental, that group selection not only can be effective, but can be effective in situations when individual selection is not. However, experiments in which true population-level traits have been shown to evolve in response to group selection are currently limited to two species of flour beetle in the genus Tribolium and RNA viruses. Here we report the results of an experiment wherein we imposed group selection via differential extinction for increased and decreased population size at 6-week intervals, a true population-level trait, in the poeciliid fish Heterandria formosa. In contrast to most other group selection experiments, we observed no evolutionary response after six rounds of group selection in either the up- or down-selected lines. Populational heritability for population size was low, if not actually negative. Our results suggest that group selection via differential extinction may be effective only if population sizes are very small and/or migration rates are low.
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/0370741
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Oct
pubmed:author	pubmed-author:BaerC FCF, pubmed-author:HigginsKK, pubmed-author:TravisJJ
pubmed:volume	76
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	169-78
pubmed:dateRevised	2010-11-18
pubmed:meshHeading	pubmed-meshheading:11132410-Animals, pubmed-meshheading:11132410-Biological Evolution, pubmed-meshheading:11132410-Fishes, pubmed-meshheading:11132410-Population Density
pubmed:year	2000
pubmed:articleTitle	Experimental evolution in Heterandria formosa, a livebearing fish: group selection on population size.
pubmed:affiliation	Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA. cbaer@darkwing.uoregon.edu
pubmed:publicationType	Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't