Intersexual differences in energy expenditure of Anolis carolinensis lizards during breeding and postbreeding seasons

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dc.contributor.authorOrrell, K. S.en
dc.contributor.authorCongdon, J. D.en
dc.contributor.authorJenssen, T. A.en
dc.contributor.authorMichener, R. H.en
dc.contributor.authorKunz, T. H.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2014-06-26en
dc.date.accessioned2014-06-27T14:45:41Zen
dc.date.available2014-06-27T14:45:41Zen
dc.date.issued2004-01en
dc.description.abstractAlthough the amount of energy that males and females invest in reproduction is an integral component of theories explaining the evolution of particular mating strategies, few studies have actually determined the amount of energy that each sex allocates to reproduction. We compared how energy is expended by male and female Anolis carolinensis lizards during both the breeding and postbreeding seasons. We used laboratory respirometry to determine resting metabolic rates (RMRs) of inactive, freshly captured lizards and the doubly labeled water technique to determine field metabolic rates (FMRs) of free-ranging lizards. Both RMRs and FMRs were influenced by body mass but not by sex. Season did not influence FMRs; however, RMRs of both sexes increased similar to 40% from the breeding to the postbreeding season. The seasonal increase in RMRs was attributed to a postreproductive increase in feeding rate and specific dynamic action. We used RMRs, FMRs, and thermal profiles of lizards to calculate energy budgets for breeding and postbreeding seasons. Energy budgets partitioned daily field energy (DFE; calculated from FMRs) into daily activity energy ( DAE) and daily resting energy (DRE; calculated from RMRs). Energy expended for reproduction was estimated as DAE during the breeding season plus egg production ( for females). Despite males having 40% greater body mass, females expended 46% more energy for reproduction than did males ( 906 and 619 J/d, respectively). Total metabolizable energy (TME = production for females) expended during the breeding season was similar for males and females ( 1,280 and 1,365 J/d, respectively). Although TME of females decreased 44% from the breeding to the postbreeding season ( 1,365 vs. 766 J/ d), TME of males was similar during both seasons ( 1,280 vs. 1,245 J/ d). There were both seasonal and sexual differences in DRE and DAE. Compared with most lizards from semiarid/ desert habitats, A. carolinensis in a temperate habitat expends more total energy during the breeding season, allocates more energy to eggs, and appears to have more total energy available for reproduction.en
dc.description.sponsorshipU.S. Department of Energy DE_FC09_96SR18546en
dc.description.sponsorshipUniversity of Georgiaen
dc.identifier.citationK. S. Orrell, J. D. Congdon, T. A. Jenssen, R. H. Michener, and T. H. Kunz. "Intersexual Differences in Energy Expenditure of Anolis carolinensis Lizards during Breeding and Postbreeding Seasons," Physiological and Biochemical Zoology, Vol. 77, No. 1 (January/February 2004), pp. 50-64. DOI: 10.1086/383497en
dc.identifier.doihttps://doi.org/10.1086/383497en
dc.identifier.issn1522-2152en
dc.identifier.urihttp://hdl.handle.net/10919/49147en
dc.identifier.urlhttp://www.jstor.org/stable/10.1086/383497en
dc.language.isoen_USen
dc.publisherUniversity of Chicago Pressen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectsceloporus-occidentalisen
dc.subjectcnemidophorus-tigrisen
dc.subjectmetabolic ratesen
dc.subjectmatingen
dc.subjectsystemsen
dc.subjectSouth Carolinaen
dc.subjectReproductionen
dc.subjectenergeticsen
dc.subjectTemperatureen
dc.subjectselectionen
dc.subjectreptilesen
dc.subjectphysiologyen
dc.subjectzoologyen
dc.titleIntersexual differences in energy expenditure of Anolis carolinensis lizards during breeding and postbreeding seasonsen
dc.title.serialPhysiological and Biochemical Zoologyen
dc.typeArticle - Refereeden

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