Cockroaches that exchange respiratory gases discontinuously survive food and water restriction

Schimpf, Natalie G., Matthews, Philip G. D. and White, Craig R. (2012) Cockroaches that exchange respiratory gases discontinuously survive food and water restriction. Evolution, 66 2: 597-604. doi:10.1111/j.1558-5646.2011.01456.x


Author Schimpf, Natalie G.
Matthews, Philip G. D.
White, Craig R.
Title Cockroaches that exchange respiratory gases discontinuously survive food and water restriction
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2012-02
Year available 2011
Sub-type Article (original research)
DOI 10.1111/j.1558-5646.2011.01456.x
Volume 66
Issue 2
Start page 597
End page 604
Total pages 8
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2012
Language eng
Abstract Metabolic rate and respiratory gas exchange patterns vary significantly both between and within species, even after a number of biotic and abiotic factors are taken into account. This suggests that such variation is of evolutionary importance, but the life history implications of this variation remain relatively poorly characterized. In the present study, we examine the effect of metabolic variation on starvation and desiccation resistance in the speckled cockroach Nauphoeta cinerea. We also compare the starvation and desiccation resistance of individuals that exchange respiratory gases continuously with those that breathe discontinuously. We show that metabolic rate has no effect on survival during food and water restriction, but cockroaches exhibiting discontinuous gas exchange cycles (DGCs) live longer than those that do not and those provisioned with water lived longer than those that were not. This finding represents the first demonstration that DGCs confer a fitness benefit, and supports the oldest hypothesis for the evolution of DGCs (which suggests that DGCs arose or are maintained to reduce respiratory water loss) as we also reveal reduced water loss (both respiratory and total) in cockroaches exhibiting discontinuous gas exchange.
Keyword DGC
Discontinuous
Fitness
Gas
Metabolism
Nauphoeta cinerea
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 3 October 2011.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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