THE INFLUENCE OF OXYGEN AND CARBON DIOXIDE ON THE SPIRACLES OF A WOOD-BORING INSECT, ORTHOSOMA BRUNNEUM (FORSTER) (COLEOPTERA: CERAMBYCIDAE)
Abstract
The respiratory gas exchange and the function of the spiracles in all stadia of Orthosoma brunneum are investigated. CO2 is released discontinuously from the prepupae, pupae, resting adults, and molting larvae while the animals are in atmospheric air. The spiracular valve of the prepupae and pupae flutters irregularly within a small amplitude in air. At intervals corresponding to the CO2 bursts the flutter amplitude increases. Intubation of one to two spiracles stops both CO2 bursts and the wide opening of the spiracles. In 4% ambient O2 or in 14% CO2 the spiracles open widely and the CO2 bursts are eliminated. Apparently, in this insect, inhabiting a moist environment, the spiracular control of external respiration is as highly developed as in free-living insects.
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Canadian Journal of Zoology
Volume 41 • Number 6 • August 1963
Pages: 1149 - 1167
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Version of record online: 14 February 2011
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U. Paim and W. E. Beckel. 1963. THE INFLUENCE OF OXYGEN AND CARBON DIOXIDE ON THE SPIRACLES OF A WOOD-BORING INSECT, ORTHOSOMA BRUNNEUM (FORSTER) (COLEOPTERA: CERAMBYCIDAE). Canadian Journal of Zoology. 41(6): 1149-1167. https://doi.org/10.1139/z63-091