Energy costs of subduing and swallowing prey for a lizard

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dc.contributorVirginia Techen
dc.contributor.authorPough, F. Harveyen
dc.contributor.authorAndrews, Robin M.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2014-03-11en
dc.date.accessioned2014-03-27T13:06:02Zen
dc.date.available2014-03-27T13:06:02Zen
dc.date.issued1985en
dc.description.abstractWe measured the oxygen consumption (aerobic energy cost) and lactic acid production (anaerobic energy cost) of scincid lizards, Chalcides ocellatus, eating domestic crickets. Aerobic metabolism accounted for 90% or more of the total energy cost of subduing and swallowing prey. The time required to subdue and swallow a cricket was linearly correlated with oxygen consumption. Oxygen consumption increased as a power function of cricket mass, but the maximum size of crickets swallowed by the lizards was set by morphological rather than by energetic constraints. The energy cost of subduing and swallowing was 0.2-0.4% of the utilizable energy of the cricket eaten. Net energy gain per unit time spent subduing and swallowing prey (e/t) declined monotonically with increasing cricket mass. Because the energy cost of eating is trivial, the shape of the e/t curve is determined by the function relating prey mass to the time required for subduing and swallowing; the energy value of prey was proportional to prey mass, whereas the time required for subduing and swallowing increased faster than prey mass. The energy value of anthropods is so high, relative to the costs for a lizard of pursuring, subduing, and swallowing, that these costs can be ignored for most ecological purposes.en
dc.description.sponsorshipVirginia Polytechnic Institute and State Universityen
dc.description.sponsorshipFederal Hatch funds project number 412en
dc.description.sponsorshipNew York State Agricultural Experiment Stationen
dc.identifier.citationF. Harvey Pough and Robin M. Andrews 1985. Energy Costs of Subduing and Swallowing Prey for a Lizard. Ecology 66:1525-1533. http://dx.doi.org/10.2307/1938015en
dc.identifier.doihttps://doi.org/10.2307/1938015en
dc.identifier.issn0012-9658en
dc.identifier.urihttp://hdl.handle.net/10919/46830en
dc.identifier.urlhttp://www.jstor.org/stable/1938015en
dc.language.isoen_USen
dc.publisherEcological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectChalcides ocellatusen
dc.subjectecological modelsen
dc.subjectenergeticsen
dc.subjectenergy budgeten
dc.subjectglycolysisen
dc.subjectlizardsen
dc.subjectoptimal foragingen
dc.subjectoxygen consumptionen
dc.subjectpredationen
dc.subjectScincidaeen
dc.titleEnergy costs of subduing and swallowing prey for a lizarden
dc.title.serialEcologyen
dc.typeArticle - Refereeden

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