Compressible gas gills of diving insects: Measurements and models

Matthews, Philip G. D. and Seymour, Roger S. (2010) Compressible gas gills of diving insects: Measurements and models. Journal of Insect Physiology, 56 5: 470-479. doi:10.1016/j.jinsphys.2009.07.011


Author Matthews, Philip G. D.
Seymour, Roger S.
Title Compressible gas gills of diving insects: Measurements and models
Journal name Journal of Insect Physiology   Check publisher's open access policy
ISSN 0022-1910
1879-1611
Publication date 2010-05
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jinsphys.2009.07.011
Volume 56
Issue 5
Start page 470
End page 479
Total pages 10
Editor D. L. Denlinger
F. Pennacchio
Place of publication Oxford, U.K.
Publisher Pergamon Press
Collection year 2011
Language eng
Formatted abstract
Many diving insects collect a bubble of air from the surface to supply their oxygen requirements while submerged. It has been theorised that these air bubbles may also act as compressible gas gills, as the low oxygen partial pressure (PO2) within the bubble caused by the insect's respiration creates a gradient capable of driving the diffusion of oxygen from the water into the bubble. Under these conditions nitrogen diffuses in the opposite direction, resulting in a situation where the volume of the bubble is continually shrinking while oxygen is obtained. This study measures changes in volume and PO2 within the gas gills held by a tethered water bug, Agraptocorixa eurynome. Both gill volume and PO2 drop rapidly at the beginning of a dive, but eventually the PO2 reaches an apparently stable level while volume continually declines at a slower rate. Active ventilation of the gill is crucial to maintaining oxygen uptake. These measurements are used to calculate oxygen flux into the gas gill and the oxygen consumption rate (O2) of the bug. The effectiveness of a gas gill as a respiratory organ is also demonstrated by determining the critical PO2 of the water bug and comparing this with measured gas gill PO2 and calculated O2.
© 2009 Elsevier Ltd. All rights reserved.
Keyword Compressible gas gill
Respiration
Corixidae
Oxygen gain
Model
Critical P-O2
Aquatic insect
Respiratory significance
Oxygen
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 11 August 2009.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 13 Jun 2010, 00:03:13 EST