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dc.contributorVirginia Tech
dc.contributor.authorPough, F. Harvey
dc.contributor.authorAndrews, Robin M.
dc.date.accessioned2014-03-27T13:06:02Z
dc.date.available2014-03-27T13:06:02Z
dc.date.issued1985
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/10.2307/1938015
dc.identifier.issn0012-9658
dc.identifier.urihttp://hdl.handle.net/10919/46830
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.
dc.description.sponsorshipVirginia Polytechnic Institute and State University
dc.description.sponsorshipFederal Hatch funds project number 412
dc.description.sponsorshipNew York State Agricultural Experiment Station
dc.language.isoen_US
dc.publisherEcological Society of America
dc.subjectChalcides ocellatus
dc.subjectecological models
dc.subjectenergetics
dc.subjectenergy budget
dc.subjectglycolysis
dc.subjectlizards
dc.subjectoptimal foraging
dc.subjectoxygen consumption
dc.subjectpredation
dc.subjectScincidae
dc.titleEnergy costs of subduing and swallowing prey for a lizard
dc.typeArticle - Refereed
dc.identifier.urlhttp://www.jstor.org/stable/1938015
dc.date.accessed2014-03-11
dc.title.serialEcology
dc.identifier.doihttps://doi.org/10.2307/1938015


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