Activity metabolism of the toad (Bufo americanus): Ecological consequences of ontogenetic change

Show simple item record

dc.contributor.author Taigen, Theodore en_US
dc.contributor.author Pough, F. Harvey en_US
dc.date.accessioned 2006-08-28T14:39:03Z en_US
dc.date.available 2006-08-28T14:39:03Z en_US
dc.date.issued 1981-06 en_US
dc.identifier.citation Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology 144N2 (1981) 247-252 en_US
dc.identifier.issn 1432-136X en_US
dc.identifier.uri http://hdl.handle.net/1850/2498 en_US
dc.description.abstract Following metamorphosis, juvenile toads form dense, heliothermic aggregations on the margins of the ponds from which they emerge. After a period of growth and development, during which body mass increases ten-fold, the juveniles disperse from the pond and assume the solitary, nocturnal habits that characterize adult toads. The dispersal of the toads coincides with the culmination of ontogenetic changes in activity metabolism. Unlike adults, juvenile toads exhaust rapidly when exercised and exhibit a low aerobic component of total metabolic scope. Values of aerobic scope for sustained activity ranged from 0.5 ml O2/(g•h) for the smallest juveniles to 1.0 ml O2/(g•h) for adults. The capacity of juveniles for oxygen consumption increases rapidly with growth, reaching the level of mature animals immediately prior to dispersal. In contrast to aerobic metabolism, anaerobic scope was independent of body size. Whole body lactate content after a 1 min bout of vigorous activity was elevated above the resting level by 0.14 mg lactate/g for both juvenile and adult animals. The elevated body temperatures that are achieved by basking juvenile toads probably hasten their physiological development and increase their capacity for aerobic metabolism. en_US
dc.format.extent 43151 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Springer: Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology en_US
dc.subject Bufo americanus en_US
dc.subject Metabolisms en_US
dc.subject Toads en_US
dc.title Activity metabolism of the toad (Bufo americanus): Ecological consequences of ontogenetic change en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1007/BF00802763

Files in this item

Files Size Format View

An open access version of this file is not available. Check "Publisher URL" field for access

This item appears in the following Collection(s)

Show simple item record

Search RIT DML


Advanced Search

Browse