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The pace-of-life: A sex-specific link between metabolic rate and life history in bean beetles
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.ORCID iD: 0000-0002-3501-3376
Department of Evolutionary Biology, Institute for Biological Research, University of Belgrade, Belgrade, Serbia.; Institute of Zoology, Faculty of Biology, University of Belgrade, Belgrade, Serbia.ORCID iD: 0000-0001-9978-2249
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.ORCID iD: 0000-0003-1121-6950
2017 (English)In: Functional Ecology, ISSN 0269-8463, E-ISSN 1365-2435, Vol. 31, no 12, p. 2299-2309Article in journal (Refereed) Published
Abstract [en]
  1. Metabolic rate (MR) is a key functional trait simply because metabolism converts resources into population growth rate. Yet, our empirical understanding of the sources of within species variation in MR, as well as of its life history and ecological correlates, is rather limited. Here, we assess whether MR lies at the root of a syndrome of correlated rate-dependent life-history traits in an insect.
  2. Selection for early (E) or late (L) age-at-reproduction for >160 generations in the bean beetle Acanthoscelides obtectus has produced beetles that differ markedly in juvenile development, body size, fecundity schedules, ageing and life span. Here, we use micro-respirometry to test whether this has been associated with the evolution of age- and sex-specific metabolic phenotypes.
  3. We find that mass-specific MR is 18% higher in E lines compared to L lines and that MR decreases more rapidly with chronological, but not biological, age in E lines. Males, under sexual selection to “live-fast-die-young”, show 50% higher MR than females and MR decreased more rapidly with age in males.
  4. Our results are consistent with a central role for MR for the divergence in “pace-of-life” seen in these beetles, supporting the view that MR lies at the root of ecologically relevant life-history trait variation within species.
Place, publisher, year, edition, pages
2017. Vol. 31, no 12, p. 2299-2309
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-344046DOI: 10.1111/1365-2435.12927ISI: 000416896700010OAI: oai:DiVA.org:uu-344046DiVA, id: diva2:1187598
Funder
Swedish Research Council, 621-2014-4523EU, European Research Council, GENCON AdG-294333Available from: 2018-03-05 Created: 2018-03-05 Last updated: 2018-08-10Bibliographically approved

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Arnqvist, GöranRönn, Johanna L.Immonen, Elina

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