The stimulation of immune defence accelerates development in the red flour beetle (Tribolium castaneum)

Journal of Evolutionary Biology
Olivia Roth, Joachim Kurtz

Abstract

The timing of the transition between life stages is of key importance for an organism. Depending on the environmental conditions, maturing earlier at a smaller size or maturing later at a larger size can be advantageous for fitness. Exposure to parasites and subsequent immune activation may lead to alterations in development. Immune defence often comes at a cost, such as energy drain towards immune function, which is likely to delay development. On the other hand, animals may react to an anticipated risk of infection with a phenotypically plastic shift in life history, which may more likely lead to accelerated development and earlier maturation. We tested these alternatives in the red flour beetle, Tribolium castaneum. Young larvae were exposed to a non-infectious immune challenge with heat-killed bacteria (either Escherichia coli or Bacillus thuringiensis) and they were followed up for their development, survival, adult size and reproduction. We found that animals that had experienced a bacterial challenge developed into adults earlier than sham-treated beetles, while they did not differ significantly in survival or adult size. Beetles exposed to E. coli produced fewer offspring, while exposure to B. thuringiensis did not affe...Continue Reading

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Citations

Sep 18, 2008·Proceedings. Biological Sciences·Olivia RothJoachim Kurtz
Nov 19, 2010·BMC Evolutionary Biology·Pierrick LabbéTom J Little
Sep 10, 2013·PloS One·Fanny VogelweithJérôme Moreau
Sep 15, 2012·The American Naturalist·Camillo BérénosK Mathias Wegner
Mar 16, 2016·Parasitology Research·Christoph KurzeRobin F A Moritz
Oct 21, 2009·The Journal of Animal Ecology·Olivia RothJoachim Kurtz
Oct 4, 2014·Trends in Ecology & Evolution·Oliver OttiHeike Feldhaar
Jun 29, 2016·Zoology : Analysis of Complex Systems, ZACS·Barbara MilutinovićJoachim Kurtz
Feb 15, 2018·Evolution; International Journal of Organic Evolution·Isabel S KellerOlivia Roth
Sep 25, 2019·Proceedings of the National Academy of Sciences of the United States of America·Kevin FerroJoachim Kurtz
Nov 10, 2011·FEMS Microbiology Ecology·Uma V MahajanTamara L McNealy

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