Dehydration hardly slows hopping toads (Rhinella granulosa) from xeric and mesic environments

Prates, Ivan, Angilleta, Michael J., Jr., Wilson, Robbie S., Niehaus, Amanda C. and Navas, Carlos A. (2013) Dehydration hardly slows hopping toads (Rhinella granulosa) from xeric and mesic environments. Physiological and Biochemical Zoology, 86 4: 451-457. doi:10.1086/671191

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Author Prates, Ivan
Angilleta, Michael J., Jr.
Wilson, Robbie S.
Niehaus, Amanda C.
Navas, Carlos A.
Title Dehydration hardly slows hopping toads (Rhinella granulosa) from xeric and mesic environments
Formatted title
Dehydration hardly slows hopping toads (Rhinella granulosa) from xeric and mesic environments
Journal name Physiological and Biochemical Zoology   Check publisher's open access policy
ISSN 1522-2152
1537-5293
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1086/671191
Open Access Status File (Publisher version)
Volume 86
Issue 4
Start page 451
End page 457
Total pages 7
Place of publication United States
Publisher University of Chicago Press
Collection year 2014
Language eng
Formatted abstract
The locomotor capacity of amphibians depends strongly on temperature and hydration. Understanding the potential interactions between these variables remains an important challenge because temperature and water availability covary strongly in natural environments. We explored the effects of temperature and hydration on the hopping speeds of Rhinella granulosa, a small toad from the semiarid Caatinga and the Atlantic Rain Forest in Brazil. We asked whether thermal and hydric states interact to determine performance and whether toads from the Caatinga differ from their conspecifics from the Atlantic Forest. Both dehydration and cooling impaired hopping speed, but effects were independent of one another. In comparison to performances of other anurans, the performance of R. granulosa was far less sensitive to dehydration. Consequently, dehydrated members of this species may be able to sustain performance through high body temperatures, which agrees with the exceptional heat tolerance of this species. Surprisingly, toads from both the Caatinga and the Atlantic Forest were relatively insensitive to dehydration. This observation suggests that migration or gene flow between toads from the forest and those from a drier region occurred or that toads from a dry region colonized the forest secondarily.
Keyword Evaporative water-loss
Thermal sensitivity
Behavioral thermoregulation
Locomotor performance
Anuran amphibians
Muscle performance
Rana-pipiens
Temperature
Frogs
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
 
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