Metabolic rate in the whip-spider, Damon annulatipes (Arachnida: Amblypygi)

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dc.contributor.authorTerblanche J.S.
dc.contributor.authorKlok C.J.
dc.contributor.authorMarais E.
dc.contributor.authorChown S.L.
dc.date.accessioned2011-05-15T15:59:39Z
dc.date.available2011-05-15T15:59:39Z
dc.date.issued2004
dc.description.abstractMetabolic rate estimates as well as a measure of their repeatability and response to laboratory acclimation are provided for the amblypygid Damon annulatipes (Wood). This species (mean±S.E. mass: 640±66 mg) shows continuous gas exchange, as might be expected from its possession of book lungs, and at 21°C has a metabolic rate of 30.22±2.87 μl CO 2 h-1 (≈229.6±21.8 μW, R.Q.=0.72). The intraclass correlation coefficient (r=0.74-0.89) indicated substantial repeatability in metabolic rate which did not change with laboratory acclimation over a period of 2 weeks. By contrast, absolute metabolic rate declined by c. 16-33%, although this was not a consequence of changes in mass (which were non-significant over the same period). Rather, it appears that a reduction in overall stress or activity in the laboratory might have been responsible for the decline in mass-independent metabolic rate. At the intraspecific level, metabolic rate scaled as μW=342M0.857, where mass is in grams. Metabolic rates of this species are in keeping with its sedentary behaviour such that for a given body size they are lower than those of most arthropods (spiders and insects), higher than the very sedentary ticks, and equivalent to scorpions. These findings have implications for the understanding of the evolution of metabolic rates in arthropods. © 2004 Elsevier Ltd. All rights reserved.
dc.description.versionArticle
dc.identifier.citationJournal of Insect Physiology
dc.identifier.citation50
dc.identifier.citation7
dc.identifier.issn221910
dc.identifier.other10.1016/j.jinsphys.2004.04.010
dc.identifier.urihttp://hdl.handle.net/10019.1/11288
dc.subjectarthropod
dc.subjectgas exchange
dc.subjectmetabolism
dc.subjectadaptation
dc.subjectanalysis of variance
dc.subjectanimal
dc.subjectarticle
dc.subjectenergy metabolism
dc.subjectmetabolism
dc.subjectoxygen consumption
dc.subjectphysiology
dc.subjectreproducibility
dc.subjectspider
dc.subjectAdaptation, Physiological
dc.subjectAnalysis of Variance
dc.subjectAnimals
dc.subjectEnergy Metabolism
dc.subjectOxygen Consumption
dc.subjectReproducibility of Results
dc.subjectSpiders
dc.subjectAcari
dc.subjectAmblypygi
dc.subjectArachnida
dc.subjectAraneae
dc.subjectArthropoda
dc.subjectHexapoda
dc.subjectInsecta
dc.subjectScorpiones
dc.titleMetabolic rate in the whip-spider, Damon annulatipes (Arachnida: Amblypygi)
dc.typeArticle
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