QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online August 31, 2004
Journal of Experimental Biology 207, 3477-3482 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01168

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gibbs, A. G. Articles by Johnson, R. A. Search for Related Content PubMed PubMed Citation Articles by Gibbs, A. G. Articles by Johnson, R. A.

The role of discontinuous gas exchange in insects: the chthonic hypothesis does not hold water

Allen G. Gibbs^1,* and Robert A. Johnson²

¹ Department of Ecology and Evolutionary Biology, 1041 E. Lowell Street, University of Arizona, Tucson, AZ 85721 USA
² School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA

View larger version (29K): [in a new window]   Fig. 1. Recordings of CO2 release (Ai–Ci) and water loss (Aii–Cii) from three alate female P. barbatus. Similar recordings were obtained for mated females and foundresses.

View larger version (17K): [in a new window]   Fig. 2. Plots of water-loss rate vs CO2 release for the three individuals A–C shown in Fig. 1.

View larger version (18K): [in a new window]   Fig. 3. Ratios of respiratory water loss to CO2 release, calculated from the slopes of plots such as those in Fig. 2. Data are means ± S.E.M. For N values, see Table 1.

View larger version (16K): [in a new window]   Fig. 4. The relationship between CO2 release and water loss during a single gas-exchange cycle. Filled symbols indicate data recorded as CO2 release, which increased early in the cycle, including the C (closed) and F (flutter) phases; open symbols indicate the rest of the cycle, as CO2 release declined after reaching its peak.

View larger version (15K): [in a new window]   Fig. 5. (A) Metabolic rates of ants using different patterns of gas exchange. Significant differences are indicated by the letters a–c: a<b<c. Data are means ± S.E.M. For N values, see Table 1.