University of Worcester Worcester Research and Publications
 
  USER PANEL:
  ABOUT THE COLLECTION:
  CONTACT DETAILS:

Metabolism and Thermoregulation in the Springhare (Pedetes capensis).

Brown, Chris and Peinke, D.M. (2003) Metabolism and Thermoregulation in the Springhare (Pedetes capensis). Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 173 (4). pp. 347-353. ISSN 0174-1578

Full text not available from this repository. (Request a copy)

Abstract

Springhares are large, nocturnally active, diurnally fossorial rodents that typically inhabit arid and semi-arid areas. This lifestyle means that they need to balance excessive heat loss when foraging at night against insufficient heat loss in a potentially warm, humid burrow and both of these against the need to minimize water turnover and energy requirements. In this study we investigated metabolism and thermoregulation in these animals. Basal metabolic rate averaged 8.62±1.37 J g -1 h -1 and minimum thermal conductance 0.386±0.062 J g -1 h -1 °C -1. These were higher and lower than expected, respectively. This, along with a relatively low, lower critical temperature and broad thermal neutral zone indicate that springhares are physiologically well suited to the low night-time temperatures, which they typically encounter. Body temperatures were quite labile but springhares became hyperthermic at temperatures above 30 °C suggesting that they are poor thermoregulators at high temperatures. This is attributed to their seldom, if ever, encountering temperatures in this range. Insufficient heat loss under normal resting conditions does not appear to be a problem, as springhares inhabit deep burrows in which the temperature never exceeds the upper critical temperature. Excess heat generated during vigorous underground exercise is presumably stored and dissipated to the cool night air or the cooler soil when subsequently resting. Water turnover and energy expenditure are presumably adequately addressed by other physiological and behavioural characteristics.

Item Type: Article
Additional Information:

The electronic full-text cannot be supplied for this item . Please check availability with your local library or Interlibrary Requests Service.

Uncontrolled Keywords: springhares, metabolism, thermoregulation, burrow microclimate
Subjects: Q Science > QL Zoology
Q Science > QH Natural history > QH301 Biology
Divisions: Academic Departments > Institute of Science and the Environment
Depositing User: Chris Brown
Date Deposited: 25 May 2010 08:12
Last Modified: 25 May 2010 08:12
URI: https://eprints.worc.ac.uk/id/eprint/892

Actions (login required)

View Item View Item
 
     
Worcester Research and Publications is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.