| Single and multigenerational responses of body mass to atmospheric oxygen concentrations in Drosophila melanogaster : evidence for roles of plasticity and evolution. | |
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MedLine Citation:
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PMID: 19878502 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Greater oxygen availability has been hypothesized to be important in allowing the evolution of larger invertebrates during the Earth's history, and across aquatic environments. We tested for evolutionary and developmental responses of adult body size of Drosophila melanogaster to hypoxia and hyperoxia. Individually reared flies were smaller in hypoxia, but hyperoxia had no effect. In each of three oxygen treatments (hypoxia, normoxia or hyperoxia) we reared three replicate lines of flies for seven generations, followed by four generations in normoxia. In hypoxia, responses were due primarily to developmental plasticity, as average body size fell in one generation and returned to control values after one to two generations of normoxia. In hyperoxia, flies evolved larger body sizes. Maximal fly mass was reached during the first generation of return from hyperoxia to normoxia. Our results suggest that higher oxygen levels could cause invertebrate species to evolve larger average sizes, rather than simply permitting evolution of giant species. |
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Authors:
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C J Klok; A J Hubb; J F Harrison |
Publication Detail:
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Type: Journal Article Date: 2009-10-30 |
Journal Detail:
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Title: Journal of evolutionary biology Volume: 22 ISSN: 1420-9101 ISO Abbreviation: J. Evol. Biol. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2010-01-11 Completed Date: 2010-03-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8809954 Medline TA: J Evol Biol Country: Switzerland |
Other Details:
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Languages: eng Pagination: 2496-504 Citation Subset: IM |
Affiliation:
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School of Life Sciences, Arizona State Univesity, Tempe,AZ 85287-4501, USA. cjklok@asu.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Atmosphere Body Weight* Drosophila melanogaster / genetics*, physiology* Evolution* Oxygen / metabolism* Selection, Genetic |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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