Physiological thermoregulation in a crustacean? Heart rate hysteresis in the freshwater crayfish Cherax destructor

Goudkamp, J. E., Seebacher, F., Ahern, M. and Franklin, C. E. (2004) Physiological thermoregulation in a crustacean? Heart rate hysteresis in the freshwater crayfish Cherax destructor. Comparative Biochemistry And Physiology A-molecular & Integrative Physiology, 138 3: 399-403. doi:10.1016/j.cbpb.2004.06.002


Author Goudkamp, J. E.
Seebacher, F.
Ahern, M.
Franklin, C. E.
Title Physiological thermoregulation in a crustacean? Heart rate hysteresis in the freshwater crayfish Cherax destructor
Journal name Comparative Biochemistry And Physiology A-molecular & Integrative Physiology   Check publisher's open access policy
ISSN 1095-6433
Publication date 2004
Sub-type Article (original research)
DOI 10.1016/j.cbpb.2004.06.002
Volume 138
Issue 3
Start page 399
End page 403
Total pages 5
Editor P. Walsh
T. Mommsen
Place of publication New York
Publisher Elsevier Inc
Collection year 2004
Language eng
Subject C1
270599 Zoology not elsewhere classified
780105 Biological sciences
Abstract Differential heart rates during heating and cooling (heart rate hysteresis) are an important thermoregulatory mechanism in ectothermic reptiles. We speculate that heart rate hysteresis has evolved alongside vascularisation, and to determine whether this phenomenon occurs in a lineage with vascularised circulatory systems that is phylogenetically distant from reptiles, we measured the response of heart rate to convective heat transfer in the Australian freshwater crayfish, Cherax destructor. Heart rate during convective heating (from 20 to 30 degreesC) was significantly faster than during cooling for any given body temperature. Heart rate declined rapidly immediately following the removal of the heat source, despite only negligible losses in body temperature. This heart rate 'hysteresis' is similar to the pattern reported in many reptiles and, by varying peripheral blood flow, it is presumed to confer thermoregulatory benefits particularly given the thermal sensitivity of many physiological rate functions in crustaceans. (C) 2004 Published by Elsevier Inc.
Keyword Biochemistry & Molecular Biology
Physiology
Zoology
Body Temperature
Circulatory System
Ectotherms
Heart Rate
Thermoregulation
Lizard Pogona-barbata
Crab Cancer-magister
Cardiovascular-system
Environmental Hypoxia
Homarus-americanus
Hemolymph-flow
Varanus-varius
In-situ
Temperature
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 03:22:32 EST