Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Comparative thermoregulatory physiology of two dunnarts, Sminthopsis macroura and Sminthopsis ooldea (Marsupialia:Dasyuridae)

    Access Status
    Fulltext not available
    Authors
    Tomlinson, Sean
    Withers, Philip
    Maloney, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Tomlinson, S. and Withers, P. and Maloney, S. 2012. Comparative thermoregulatory physiology of two dunnarts, Sminthopsis macroura and Sminthopsis ooldea (Marsupialia:Dasyuridae). Australian Journal of Zoology. 60 (1): pp. 54-63.
    Source Title
    Australian Journal of Zoology
    DOI
    10.1071/ZO12034
    ISSN
    0004-959X
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/52441
    Collection
    • Curtin Research Publications
    Abstract

    Metabolic rate and evaporative water loss (EWL) were measured to quantify the thermoregulatory patterns of two dasyurids, the stripe-faced dunnart (Sminthopsis macroura) and the Ooldea dunnart (S. ooldea) during acute exposure to T a between 10 and 35°C. S. macroura maintained consistent T b across the T a range, whereas S. ooldea was more thermolabile. The metabolic rate of both species decreased from T a=10°C to BMR at T a=30°C. Mass-adjusted BMR at T a=30°C was the same for the two species, but there was no common regression of metabolic rate below the thermoneutral zone (TNZ). There was no significant difference between the species in allometrically corrected EWL at T a=30°C. Total EWL increased significantly at T a=10 and 35°C compared with the TNZ for S. macroura, but was consistent across the T a range for S. ooldea. At any T a below the TNZ, S. macroura required more energy per gram of body mass than S. ooldea, and had a higher EWL at the lower critical T a. By being thermolabile S. ooldea reduced its energetic requirements and water loss at low T a. The more constant thermoregulatory strategy of S. macroura may allow it to exploit a broad climatic envelope, albeit at the cost of higher energetic and water requirements. Since S. ooldea does not expend as much energy and water on thermoregulation this may be a response to the very low productivity, 'hyperarid' conditions of its central Australian distribution. © 2012 CSIRO.

    Related items

    Showing items related by title, author, creator and subject.

    • Critical issues for the future of the Australian urban water supply industry
      Fazakerley, Victor William (2005)
      This study makes a contribution to the Australian urban water supply industry because it highlights some of the critical issues the industry faces in the future. Through the scenarios it illuminates an alternative method ...
    • Characterisation of aquatic natural organic matter by micro-scale sealed vessel pyrolysis
      Berwick, Lyndon (2009)
      The analytical capacity of MSSV pyrolysis has been used to extend the structural characterisation of aquatic natural organic matter (NOM). NOM can contribute to various potable water issues and is present in high ...
    • The development of a rigorous nanocharacterization scheme for electrochemical systems
      Veder, Jean-Pierre M. (2010)
      This thesis reports on a methodology for the nanocharacterization of complex electrochemical systems. A series of powerful techniques have been adapted and applied to studies of two scientifically important electrochemical ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.