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Maximum permissible load for Yonaguni ponies (Japanese landrace horses) trotting over a short, straight course

By A. Matsuura, H. Mano, M. Irimajiri, K. Hodate

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Abstract

This study aimed to determine the load-bearing capacity of trotting Yonaguni ponies using gait analysis. The Yonaguni pony is one of the Japanese landrace horses, and has normal gait characteristics when trotting. As a breed they are small in stature and hence susceptible to the effect of the rider's weight. It is therefore important to determine their load-bearing capacity as regards to their welfare. Ten Yonaguni ponies with a (meanSD) height at withers of 122 (2.9) cm had a marker attached to their chests, and their unridden gait was recorded using two high-resolution hybrid cameras while they trotted along a short (40 m), straight course. In total, nine tests were performed for each horse: the first with a 0-kg load; seven with randomly loaded weights weighing 10-70 kg; and then a final test again with a 0-kg load. Three-dimensional movement of the marker was analysed using a motion capture system. The time series of vertical displacement of the marker underwent spectrum analysis, and the autocorrelation coefficient was calculated. The first two peaks of the autocorrelation were defined as symmetry and gait regularity, and their sum was defined as stability. Symmetry (no unit) in the 70-kg test (0.53) was lower than that in the first 0-kg test (0.68), and stability (no unit) in the 70-kg test (1.16) was lower than that in the first 0-kg test (1.41). We concluded that the maximum permissible load for a trotting Yonaguni pony is

Publication Title Animal Welfare
Volume 25
Issue 1
Pages 151-156
ISBN/ISSN 0962-7286
Language English
Author Address Department of Animal Science, School of Veterinary Medicine, Kitasato University, 23-35-1, Higashi, Towada, Aomori 034-8628, Japan.matsuura@vmas.kitasato-u.ac.jp
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Tags
  1. Analysis
  2. Animals
  3. Animal welfare
  4. Body weight
  5. Dog Breeds
  6. Effect
  7. Gait
  8. Horses
  9. Hybrids
  10. Land
  11. Light
  12. Mammals
  13. Movement
  14. peer-reviewed
  15. Pigs
  16. stability
  17. Suiformes
  18. Techniques
  19. ungulates
  20. vertebrates
Badges
  1. peer-reviewed