Oxygen-induced plasticity in tracheal morphology and discontinuous gas exchange cycles in cockroaches Nauphoeta cinerea

Bartrim, Hamish, Matthews, Philip G. D., Lemon, Sussan and White, Craig R. (2014) Oxygen-induced plasticity in tracheal morphology and discontinuous gas exchange cycles in cockroaches Nauphoeta cinerea. Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 184 8: 977-990. doi:10.1007/s00360-014-0862-8


Author Bartrim, Hamish
Matthews, Philip G. D.
Lemon, Sussan
White, Craig R.
Title Oxygen-induced plasticity in tracheal morphology and discontinuous gas exchange cycles in cockroaches Nauphoeta cinerea
Formatted title
Oxygen-induced plasticity in tracheal morphology and discontinuous gas exchange cycles in cockroaches Nauphoeta cinerea
Journal name Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology   Check publisher's open access policy
ISSN 0174-1578
1432-136X
Publication date 2014-12
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s00360-014-0862-8
Open Access Status
Volume 184
Issue 8
Start page 977
End page 990
Total pages 14
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2015
Language eng
Formatted abstract
The function and mechanism underlying discontinuous gas exchange in terrestrial arthropods continues to be debated. Three adaptive hypotheses have been proposed to explain the evolutionary origin or maintenance of discontinuous gas exchange cycles (DGCs), which may have evolved to reduce respiratory water loss, facilitate gas exchange in high CO2 and low O2 micro-environments, or to ameliorate potential damage as a result of oversupply of O2. None of these hypotheses have unequivocal support, and several non-adaptive hypotheses have also been proposed. In the present study, we reared cockroaches Nauphoeta cinerea in selected levels of O2 throughout development, and examined how this affected growth rate, tracheal morphology and patterns of gas exchange. O2 level in the rearing environment caused significant changes in tracheal morphology and the exhibition of DGCs, but the direction of these effects was inconsistent with all three adaptive hypotheses: water loss was not associated with DGC length, cockroaches grew fastest in hyperoxia, and DGCs exhibited by cockroaches reared in normoxia were shorter than those exhibited by cockroaches reared in hypoxia or hyperoxia.
Keyword Breathing
Periodic ventilation
Metabolic rate
Hypoxia
Hyperoxia
Development
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Biological Sciences Publications
 
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