...Berlizé Groenewald; Steven L. Chown; John S. Terblanche The evolutionary origin and maintenance of discontinuous gas exchange (DGE) in tracheate arthropods are poorly understood and highly controversial. We investigated prioritization of abiotic factors in the gas exchange control cascade...

...Philip G. D. Matthews; Craig R. White SUMMARY Many insects at rest breathe discontinuously, alternating between brief bouts of gas exchange and extended periods of breath-holding. The association between discontinuous gas exchange cycles (DGCs) and inactivity has long been recognised, leading...

...Edward P. Snelling; Philip G. D. Matthews; Roger S. Seymour SUMMARY The discontinuous gas exchange cycle (DGC) is a three-phase breathing pattern displayed by many insects at rest. The pattern consists of an extended breath-hold period (closed phase), followed by a sequence of rapid gas exchange...

...Natalie G. Schimpf; Philip G. D. Matthews; Robbie S. Wilson; Craig R. White SUMMARY The reasons why many insects breathe discontinuously at rest are poorly understood and hotly debated. Three adaptive hypotheses attempt to explain the significance of these discontinuous gas exchange cycles (DGCs...

...Susana Clusella-Trullas; Steven L. Chown SUMMARY Several controversies currently dominate the fields of arthropod metabolic rate, gas exchange and water balance, including the extent to which modulation of gas exchange reduces water loss, the origins of discontinuous gas exchange,the relationship...

...John R. B. Lighton; Robbin J. Turner SUMMARY The discontinuous gas exchange cycle (DGC) of insects and other tracheate arthropods temporally decouples oxygen uptake and carbon dioxide emission and generates powerful concentration gradients for both gas species between the outside world...

... to be the ancestral gas exchange pattern at rest (recognizing that active individuals typically show continuous gas exchange), and discontinuous gas exchange probably originated independently a minimum of five times in the Insecta. * Author for correspondence (e-mail: [email protected] ) 12 10 2005 ©...

... that is infrequently tested in insects. * Author for correspondence (e-mail: [email protected] ). 2 9 2003 © The Company of Biologists Limited 2003 2003 adaptation body size discontinuous gas exchange metabolic rate variation cockroach Perisphaeria sp For a trait...

...Mark A. Chappell; Gordon L. Rogowitz ABSTRACT Ventilatory accommodation of changing metabolic rates is a relatively little-studied aspect of the discontinuous gas exchange cycles (DGCs) that occur in a wide variety of terrestrial arthropods. We used correlation analysis of resting metabolic rate...

...Steven L. Chown; Peter Holter ABSTRACT It has been suggested that discontinuous gas exchange cycles (DGCs) in insects evolved in response to hypoxic and/or hypercapnic environments, and that the flutter phase of the DGC is predominantly diffusive. We tested these hypotheses by examining the rate...