|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Journal of Experimental Biology, Vol 174, Issue 1 185-197, Copyright © 1993 by Company of Biologists
JOURNAL ARTICLES |
S. J. Swoap, T. P. Johnson, R. K. Josephson and A. F. Bennett
The mechanical power output of fast-twitch fibres from the iliofibularis of the lizard Dipsosaurus dorsalis was measured over a broad body temperature range using the oscillatory work-loop technique. The optimal cycling frequency, that frequency at which mechanical power output is maximal, increases with temperature from 3.3 Hz at 15°C to 20.1 Hz at 42°C. Maximum power output increases with temperature, from 20 W kg-1 at 15°C to 154 W kg-1 at 42°C, the largest power output yet measured using the work-loop technique. At low temperatures (15°C and 22°C), stride frequency during burst running is nearly identical to the optimal cycling frequency for in vitro power output, suggesting that maximum power output may limit hindlimb cycle frequency in vivo. However, at higher temperatures (35°C and 42°C), the optimal cycling frequency of the isolated muscle is significantly higher than the burst stride frequency, demonstrating that contractile events no longer limit hindlimb cycle frequency. At higher temperatures, it is thus unlikely that the fast-twitch fibres of this muscle in vivo attain their potential for maximum power output.
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati 
Twitter What's this?
This article has been cited by other articles:
|
|
 |
|
  F. Seebacher and R. S. James Plasticity of muscle function in a thermoregulating ectotherm (Crocodylus porosus): biomechanics and metabolism Am J Physiol Regulatory Integrative Comp Physiol, March 1, 2008; 294(3): R1024 - R1032. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Sponberg and R. J. Full Neuromechanical response of musculo-skeletal structures in cockroaches during rapid running on rough terrain J. Exp. Biol., February 1, 2008; 211(3): 433 - 446. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J.R Lovvorn Thermal substitution and aerobic efficiency: measuring and predicting effects of heat balance on endotherm diving energetics Phil Trans R Soc B, November 29, 2007; 362(1487): 2079 - 2093. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. P. Lailvaux Interactive effects of sex and temperature on locomotion in reptiles Integr. Comp. Biol., August 1, 2007; 47(2): 189 - 199. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Herrel, R. S. James, and R. Van Damme Fight versus flight: physiological basis for temperature-dependent behavioral shifts in lizards J. Exp. Biol., May 15, 2007; 210(10): 1762 - 1767. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. Bergmann and D. J. Irschick Effects of temperature on maximum acceleration, deceleration and power output during vertical running in geckos J. Exp. Biol., April 15, 2006; 209(8): 1404 - 1412. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Kohlsdorf, R. S. James, J. E. Carvalho, R. S. Wilson, M. Dal Pai-Silva, and C. A. Navas Locomotor performance of closely related Tropidurus species: relationships with physiological parameters and ecological divergence J. Exp. Biol., March 1, 2004; 207(7): 1183 - 1192. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. J. Irschick, B. Vanhooydonck, A. Herrel, and A. Andronescu Effects of loading and size on maximum power output and gait characteristics in geckos J. Exp. Biol., November 15, 2003; 206(22): 3923 - 3934. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Wikelski and L. M. Romero Body Size, Performance and Fitness in Galapagos Marine Iguanas Integr. Comp. Biol., July 1, 2003; 43(3): 376 - 386. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. J. Roberts and J. A. Scales Mechanical power output during running accelerations in wild turkeys J. Exp. Biol., May 15, 2002; 205(10): 1485 - 1494. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Vanhooydonck, R. Van Damme, and P. Aerts Variation in speed, gait characteristics and microhabitat use in lacertid lizards J. Exp. Biol., April 1, 2002; 205(7): 1037 - 1046. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. E. Nelson and B. C. Jayne The effects of speed on the in vivo activity and length of a limb muscle during the locomotion of the iguanian lizard Dipsosaurus dorsalis J. Exp. Biol., March 12, 2002; 204(20): 3507 - 3522. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. N. Ahn and R. J. Full A motor and a brake: two leg extensor muscles acting at the same joint manage energy differently in a running insect J. Exp. Biol., February 1, 2002; 205(3): 379 - 389. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. N. Askew and R. L. Marsh The mechanical power output of the pectoralis muscle of blue-breasted quail (Coturnix chinensis): the in vivo length cycle and its implications for muscle performance J. Exp. Biol., January 11, 2001; 204(21): 3587 - 3600. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. McLister Physical factors affecting the cost and efficiency of sound production in the treefrog Hyla versicolor J. Exp. Biol., January 1, 2001; 204(1): 69 - 80. [Abstract] [PDF]
|
|
|
|
|
|
R. Josephson, J. Malamud, and D. Stokes Power output by an asynchronous flight muscle from a beetle J. Exp. Biol., January 9, 2000; 203(17): 2667 - 2689. [Abstract] [PDF]
|
|
|
|
 |
|
 V. Brezina and K. R. Weiss The Neuromuscular Transform Constrains the Production of Functional Rhythmic Behaviors J Neurophysiol, January 1, 2000; 83(1): 232 - 259. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Swank and L. Rome The influence of temperature on power production during swimming. I. In vivo length change and stimulation pattern J. Exp. Biol., January 1, 2000; 203(2): 321 - 331. [Abstract] [PDF]
|
|
|
|
|
|
L. Rome, D. Swank, and D. Coughlin The influence of temperature on power production during swimming. II. Mechanics of red muscle fibres in vivo J. Exp. Biol., January 1, 2000; 203(2): 333 - 345. [Abstract] [PDF]
|
|
