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Influence of Body Size and Environmental Temperature on Carbon Dioxide Production by Forest Centipedes from Southwestern North America

Pennington, L.A., Meehan, T.D.
Environmental entomology 2007 v.36 no.4 pp. 673-680
Chilopoda, Geophilidae, Lithobiidae, body size, ambient temperature, carbon dioxide, respiratory gases, metabolism, resting metabolic rate, linear models, nonlinear models, soil arthropods, montane forests, Southwestern United States, New Mexico
We conducted a laboratory study to evaluate the mass and temperature dependence of carbon dioxide production by three dominant centipede species-Arctogeophilus umbraticus McNeill, Gonibius glyptocephalus Chamberlin, and Oabius sp.-from a montane forest in southwestern North America. We found that CO2 production (Q, μl/h) of resting, nonfasted individuals was related to body mass (M, mg live) and environmental temperature (T, K) as Q = e18.32M0.82e-0.49/kT, where e is the base of the natural logarithm and k is Boltzmann's constant (8.62 x 10(-5) eV/K). Our results indicated that the mass and temperature dependence of centipede metabolism is comparable with that of other arthropods. They also supported previous claims that centipede metabolic rate, for a given mass and temperature, is relatively low compared with other arthropods. Suggestions are given for using resulting metabolic rate equations in conjunction with data on abundance, body size, and environmental temperature to assess energy flux by centipede populations.