title: Energetics of vocalization in the African reed frog (Hyperolius marmoratus).
abstract: Rates of oxygen consumption and carbon dioxide release were measured in calling and resting painted reed frogs, Hyperolius marmoratus. O2 consumption increased linearly with call rate and reached 0.91 ml/g . h at average call rates of 3100 calls/hr. The respiratory quotient (RQ = VCO2/VO2) was calculated to evaluate which metabolic substrates--lipids or carbohydrates--are utilized. Males that were not fed for a week had significantly lower RQ's during calling (0.75) than recently fed males (0.89) and thus utilized approximately twice as much lipid to fuel calling. Whole-body lipid reserves of males collected in the field varied considerably. Lipid stores alone would be sufficient to provide energy for a median of 15 nights of calling activity at a high density chorus.
authors: Section of Neurobiology and Behavior, Cornell University, Ithaca, N.Y., USA. grafe@biozentrum.uni. wuerzberg.de
authors: T U
authors: TU
authors: Grafe
mesh_terms: D000818:Animals; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D008297:Male; D011893:Rana esculenta; D014828:Vocalization, Animal / Q000502:physiology*