The direct effects of male killer infection on fitness of ladybird hosts (Coleoptera:Coccinellidae)

S. Elnagdy; M. E. N. MAJERUS; M. Gardener; L.‐J. Lawson Handley

doi:10.1111/jeb.12186

journal article Jul 22, 2013

The direct effects of male killer infection on fitness of ladybird hosts (Coleoptera:Coccinellidae)

S. Elnagdy M. E. N. MAJERUS M. Gardener L.‐J. Lawson Handley

Journal of Evolutionary Biology Vol. 26 No. 8 pp. 1816-1825 · Oxford University Press (OUP)

View at Publisher Save 10.1111/jeb.12186

Abstract

AbstractMale killing bacteria are common in insects and are thought to persist in host populations primarily by indirect fitness benefits to infected females, whereas direct fitness effects are generally assumed to be neutral or deleterious. Here, we estimated the effect of male killer infection on direct fitness (number of eggs laid, as a measure of fecundity, together with survival) and other life‐history traits (development time and body size) in seven ladybird host/male killer combinations. Effects of male killers on fecundity ranged, as expected, from costly to neutral; however, we found evidence of reduced development time and increased survival and body size in infected strains. Greater body size inSpiroplasma‐infectedHarmonia axyridiscorresponded to greater ovariole number and therefore higherpotentialfecundity. To our knowledge, this is the first report of direct benefits of male killer infection after explicitly controlling for indirect fitness effects. Neutral or deleterious fitness effects of male killer infection should not therefore be automatically assumed.

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Citations

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References

Details

Published: Jul 22, 2013
Vol/Issue: 26(8)
Pages: 1816-1825
License: View

Authors

S

S. Elnagdy

Department of Genetics University of Cambridge Cambridge UK; Botany Department Faculty of Sciences Cairo University Giza Egypt

M

M. E. N. MAJERUS

Department of Genetics University of Cambridge Cambridge UK

M

M. Gardener

Department of Environment, Earth and Ecosystems The Open University Milton Keynes UK

L

L.‐J. Lawson Handley

Evolutionary Biology Group Department of Biological Sciences University of Hull Hull UK

Funding

BP Egypt and Cambridge Overseas Trusts

Cite This Article

S. Elnagdy, M. E. N. MAJERUS, M. Gardener, et al. (2013). The direct effects of male killer infection on fitness of ladybird hosts (Coleoptera:Coccinellidae). Journal of Evolutionary Biology, 26(8), 1816-1825. https://doi.org/10.1111/jeb.12186

The direct effects of male killer infection on fitness of ladybird hosts (Coleoptera:Coccinellidae)

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