Sustained swimming performance in crocodiles (Crocodylus porosus): Effects of body size and temperature

Elsworth, P. G., Seebacher, F. and Franklin, C. E. (2003) Sustained swimming performance in crocodiles (Crocodylus porosus): Effects of body size and temperature. Journal of Herpetology, 37 2: 363-368. doi:10.1670/0022-1511(2003)037[0363:SSPICC]2.0.CO;2


Author Elsworth, P. G.
Seebacher, F.
Franklin, C. E.
Title Sustained swimming performance in crocodiles (Crocodylus porosus): Effects of body size and temperature
Journal name Journal of Herpetology   Check publisher's open access policy
ISSN 0022-1511
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1670/0022-1511(2003)037[0363:SSPICC]2.0.CO;2
Volume 37
Issue 2
Start page 363
End page 368
Total pages 6
Place of publication St Louis, USA
Publisher Society for the Study of Amphibians and Reptiles
Collection year 2003
Language eng
Subject C1
270604 Comparative Physiology
770599 Other
Abstract We examined effects of body size and temperature on swimming performance in juvenile estuarine crocodiles, Crocodylus porosus, over the size range of 30-110 cm total body length. Swimming performance, expressed as maximum sustainable swimming speed, was measured in a temperature- and flow-controlled swimming flume. Absolute sustainable swimming speed increased with body length, but length-specific swimming performance decreased as body length increased. Sustained swimming speed increased with temperature between 15degreesC and 23degreesC, remained constant between 23degrees and 33degreesC, and decreased as temperature rose above 33degreesC. Q(10)-values of swimming speed were 2.60 (+/- 0.091 SE) between 18degreesC and 23degreesC, and there were no differences in Q(10) between crocodiles of different sizes. The broad plateau of thermal independence in swimming speed observed in C. porosus may be of adaptive significance by allowing dispersal of juvenile animals at suboptimal body temperatures.
Keyword Zoology
Salmon Oncorhynchus-nerka
Fresh-water Crocodiles
American Alligators
Locomotor Performance
Aerobic Metabolism
Kinematics
Johnstoni
Patterns
Speed
Fish
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 11:29:41 EST