Lizard energetics and diet

Show full item record

Redirect: RIT Scholars content from RIT Digital Media Library has moved from to RIT Scholar Works, please update your feeds & links!
Title: Lizard energetics and diet
Author: Pough, F. Harvey
Abstract: In the families Agamidae, Gerrhosauridae, Iguanidae, and Scincidae, species that weigh more than 300 g are almost all herbivores, whereas those weighing less than 50-100 g are carnivores. Juveniles of large herbivorous species tend to be carnivorous until they reach body weights of 50-300 g. Diet is compared to metabolic expenditure in these lizards. Although smaller animals have higher weight-specific metabolic rates, the greater total metabolicrate of larger animals requires a greater caloric intake. Juvenile animals and species of small body size are primarily insectivorous. It is postulated that larger animals of these families are unable to get caloric demands on a diet of insects, have no practical alternative animal prey, and rely instead on vegetation. The families Anguidae, Chamaeleontidae, Helodermatidae, Teiidae, and Varanidae do not include herbivorous species, although each family has species that weigh more than 300 g. Morphological, ecological, and physiological specializations in these families account for the absence of herbivorous species. For an unspecialized lizard, evolution of large body size both requires and permits an herbivorous diet.
Description: Article may be found at:
Record URI:
Date: 1973-07

Files in this item

Files Size Format View
EcologicalSocietyofAmericaArchivePolicy.pdf 37.55Kb PDF View/Open

The following license files are associated with this item:

This item appears in the following Collection(s)

Show full item record

Search RIT DML

Advanced Search