The implication of small reductions in body temperature for radiant and convective heat loss in resting endothermic brown long-eared bats (Plecotus auritus)

Peter I. Webb*, John R. Speakman, Paul A. Racey

*Corresponding author for this work

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

1. 1.|Dorsal surface temperature (Ts) and rectal temperature (Tb) were measured in four captive endothermic brown long-eared bats, Plecotus auritus, resting at ambient temperatures (Ta) of 5, 15 and 25°C. 2. 2.|A heat flux model for the bats was derived and the reduction in radiant and convective heat loss associated with small reductions in Tb were predicted from thoeretical equations. 3. 3.|A drop in body temperature from the maximum (38.2°C) to the minimum (31.5°C) recorded value was estimated to produce energy savings through a reduction in gross radiant and convective heat loss of 25 and 44% of metabolic heat production at ambient temperatures of 5 and 25°C, respectively. 4. 4.|We suggest that small reductions in body temperature offer resting thermolabile bats a compromise between rapid behavioural function associated with high body temperature and low energy demand associated with torpor.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalJournal of Thermal Biology
Volume18
Issue number3
DOIs
Publication statusPublished - 30 Jun 1993

Fingerprint

Plecotus
Body Temperature
Heat losses
body temperature
Chiroptera
Hot Temperature
heat
Temperature
ambient temperature
resting periods
Torpor
energy
heat production
surface temperature
Thermogenesis
temperature
Heat flux
Energy conservation

Keywords

  • Body temperature
  • brown long-eared bat
  • convection
  • Plecotus auritus
  • surface temperature
  • thermal radiation

ASJC Scopus subject areas

  • Physiology
  • Biochemistry
  • Agricultural and Biological Sciences(all)
  • Developmental Biology

Cite this

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title = "The implication of small reductions in body temperature for radiant and convective heat loss in resting endothermic brown long-eared bats (Plecotus auritus)",
abstract = "1. 1.|Dorsal surface temperature (Ts) and rectal temperature (Tb) were measured in four captive endothermic brown long-eared bats, Plecotus auritus, resting at ambient temperatures (Ta) of 5, 15 and 25°C. 2. 2.|A heat flux model for the bats was derived and the reduction in radiant and convective heat loss associated with small reductions in Tb were predicted from thoeretical equations. 3. 3.|A drop in body temperature from the maximum (38.2°C) to the minimum (31.5°C) recorded value was estimated to produce energy savings through a reduction in gross radiant and convective heat loss of 25 and 44{\%} of metabolic heat production at ambient temperatures of 5 and 25°C, respectively. 4. 4.|We suggest that small reductions in body temperature offer resting thermolabile bats a compromise between rapid behavioural function associated with high body temperature and low energy demand associated with torpor.",
keywords = "Body temperature, brown long-eared bat, convection, Plecotus auritus, surface temperature, thermal radiation",
author = "Webb, {Peter I.} and Speakman, {John R.} and Racey, {Paul A.}",
year = "1993",
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AU - Speakman, John R.

AU - Racey, Paul A.

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Y1 - 1993/6/30

N2 - 1. 1.|Dorsal surface temperature (Ts) and rectal temperature (Tb) were measured in four captive endothermic brown long-eared bats, Plecotus auritus, resting at ambient temperatures (Ta) of 5, 15 and 25°C. 2. 2.|A heat flux model for the bats was derived and the reduction in radiant and convective heat loss associated with small reductions in Tb were predicted from thoeretical equations. 3. 3.|A drop in body temperature from the maximum (38.2°C) to the minimum (31.5°C) recorded value was estimated to produce energy savings through a reduction in gross radiant and convective heat loss of 25 and 44% of metabolic heat production at ambient temperatures of 5 and 25°C, respectively. 4. 4.|We suggest that small reductions in body temperature offer resting thermolabile bats a compromise between rapid behavioural function associated with high body temperature and low energy demand associated with torpor.

AB - 1. 1.|Dorsal surface temperature (Ts) and rectal temperature (Tb) were measured in four captive endothermic brown long-eared bats, Plecotus auritus, resting at ambient temperatures (Ta) of 5, 15 and 25°C. 2. 2.|A heat flux model for the bats was derived and the reduction in radiant and convective heat loss associated with small reductions in Tb were predicted from thoeretical equations. 3. 3.|A drop in body temperature from the maximum (38.2°C) to the minimum (31.5°C) recorded value was estimated to produce energy savings through a reduction in gross radiant and convective heat loss of 25 and 44% of metabolic heat production at ambient temperatures of 5 and 25°C, respectively. 4. 4.|We suggest that small reductions in body temperature offer resting thermolabile bats a compromise between rapid behavioural function associated with high body temperature and low energy demand associated with torpor.

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KW - convection

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KW - surface temperature

KW - thermal radiation

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