Symmorphosis and the insect respiratory system: a comparison between flight and hopping muscle

Snelling, Edward P., Seymour, Roger S., Runciman, Sue, Matthews, Philip G. D. and White, Craig R. (2012) Symmorphosis and the insect respiratory system: a comparison between flight and hopping muscle. Journal of Experimental Biology, 215 18: 3324-3333. doi:10.1242/jeb.072975

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Author Snelling, Edward P.
Seymour, Roger S.
Runciman, Sue
Matthews, Philip G. D.
White, Craig R.
Title Symmorphosis and the insect respiratory system: a comparison between flight and hopping muscle
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
1477-9145
Publication date 2012-09-15
Sub-type Article (original research)
DOI 10.1242/jeb.072975
Open Access Status File (Publisher version)
Volume 215
Issue 18
Start page 3324
End page 3333
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Collection year 2013
Language eng
Formatted abstract
Weibel and Taylor's theory of symmorphosis predicts that the structural components of the respiratory system are quantitatively adjusted to satisfy, but not exceed, an animal's maximum requirement for oxygen. We tested this in the respiratory system of the adult migratory locust Locusta migratoria by comparing the aerobic capacity of hopping and flight muscle with the morphology of the oxygen cascade. Maximum oxygen uptake by flight muscle during tethered flight is 967±76 μmol h−1 g−1 (body mass specific, ±95% confidence interval CI), whereas the hopping muscles consume a maximum of 158±8 μmol h−1 g−1 during jumping. The 6.1-fold difference in aerobic capacity between the two muscles is matched by a 6.4-fold difference in tracheole lumen volume, which is 3.5×108±1.2×108 μm3 g−1 in flight muscle and 5.5×107±1.8×107 μm3 g−1 in the hopping muscles, a 6.4-fold difference in tracheole inner cuticle surface area, which is 3.2×109±1.1×109 μm2 g−1 in flight muscle and 5.0×108±1.7×108 μm2 g−1 in the hopping muscles, and a 6.8-fold difference in tracheole radial diffusing capacity, which is 113±47 μmol kPa−1 h−1 g−1 in flight muscle and 16.7±6.5 μmol kPa−1 h−1 g−1 in the hopping muscles. However, there is little congruence between the 6.1-fold difference in aerobic capacity and the 19.8-fold difference in mitochondrial volume, which is 3.2×1010±3.9×109 μm3 g−1 in flight muscle and only 1.6×109±1.4×108 μm3 g−1 in the hopping muscles. Therefore, symmorphosis is upheld in the design of the tracheal system, but not in relation to the amount of mitochondria, which might be due to other factors operating at the molecular level.
Keyword Anatomical diffusing capacity
Insect
Locust
Mitochondria
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Biological Sciences Publications
 
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