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First published online January 31, 2007
Journal of Experimental Biology 210, 668-675 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.001966
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Cyclic gas-exchange in the Chilean red cricket: inter-individual variation and thermal dependence

Roberto F. Nespolo*, Paulina Artacho and Luis E. Castañeda

Instituto de Ecología y Evolución, Universidad Austral de Chile, Casilla 567, Valdivia, Chile


Figure 1
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  		Fig. 1. Three representative VCO2 records in individuals of different body masses, exhibiting the ventilatory cycles (enlarged) and the characteristic low-frequency cycles of cyclic gas exchange (CGE).

 

Figure 2
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  		Fig. 2. Three representative VCO2 records at different ambient temperatures (Ta).

 

Figure 3
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  		Fig. 3. Regressions between metabolic variables and body mass. (A) O-phase period; (B) ventilatory period; (C) average metabolism; (D) O-phase magnitude; (E) interburst magnitude. All relationships are significant except for O-phase period (A).

 

Figure 4
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  		Fig. 4. Logarithms of O-phase duration (A) and ventilatory period (B) (see Materials and methods for details) in individuals of C. armatus at three different temperatures. Values are adjusted means ± s.e.m. N values, see Table 1. Different letters denote significant differences (Tukey post-hoc tests); N.S., not significant.

 

Figure 5
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  		Fig. 5. Logarithms of (A) average, (B) O-phase and (C) interbursts (see Materials and methods for details) in individuals of C. armatus at three different temperatures. Values are adjusted means ± s.e.m. N values, see Table 1. Different letters denote significant differences (Tukey post-hoc tests).

 




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