On the Running of the GNU (Connochaetes Taurinus) and other Animals
Open Access
- 1 February 1976
- journal article
- Published by The Company of Biologists in Journal Of Experimental Biology
- Vol. 63 (3), 775-799
- https://doi.org/10.1242/jeb.63.3.775
Abstract
A simple optical method was used to observe speed, stride length and stepping frequency in undisturbed walking or running wild animals. Most measurements were made on the gnu (adult and young calf) and Thomson's gazelle. The hypothesis that stepping frequency is independent of speed is not tenable for any gait. The data are discussed in terms of N, the average number of feet in contact with the ground. It is suggested that the value required of N by the animal is the main consideration determining its choice of gait. The height of the vertical jumps in galloping does not need to increase indefinitely with speed, and the power needed for the jumps is not likely to limit the maximum galloping speed. Stepping frequency observations in the walk, trot and canter were analysed for 14 mammal species plus the gnu calf. Stepping frequency was found to vary with about the - 0.5 power of the linear dimensions in all three gaits. It is suggested that only three gaits should be recognized, the walk, trot and canter, and that they should be distinguished on the basis of (a) the symmetry or otherwise of the stepping pattern, (b) the range of N over which the gait can be used, and (c) the nature of the energy transformations which occur at each step.Keywords
This publication has 11 references indexed in Scilit:
- Scaling Stride Frequency and Gait to Animal Size: Mice to HorsesScience, 1974
- Energetic Cost of Locomotion in KangaroosNature, 1973
- Size and Shape in BiologyScience, 1973
- A Grazing Ecosystem in the SerengetiScientific American, 1971
- Elastic bounce of the body.Journal of Applied Physiology, 1970
- LIVEWEIGHTS AND BODY MEASUREMENTS OF SERENGETI GAME ANIMALSAfrican Journal of Ecology, 1967
- Mechanics of walking.Journal of Applied Physiology, 1966
- Symmetrical Gaits of HorsesScience, 1965
- Further Studies on Locomotion of the CheetahJournal of Mammalogy, 1961
- Motions of the Running Cheetah and HorseJournal of Mammalogy, 1959