Biology Commons^™

Energetics Of The Lizard Cnemidophorus Tigris And Life History Consequences Of Food-Acquisition Mode, Roger A. Anderson, William H. Karasov

Biology Faculty and Staff Publications

Energy budgets for the wide-foraging "arthropodivorous" lizard Cnemi­dophorus tigris were constructed for the reproductive season using doubly labeled water measurements of field metabolic rate (FMR). Rates of body mass change, clutch sizes, and clutch intervals were also investigated. FMRs of both sexes (males, 298 J·g^{- 1}·d^-1 ; females, 247 J·g^{- 1}·d- ¹) were greater in the reproductive season than during the postreproductive season. This was not due to differences in resting metabolism, but, instead, was due to higher activity costs during the reproductive season. Although males had signficantly higher FMR than females, males …