Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

FOOTPRINT PRESSURES AND LOCOMOTION OF MOAS AND UNGULATES AND THEIR EFFECTS ON THE NEW ZEALAND INDIGENOUS BIOTA THROUGH TRAMPLING

KELVIN DUNCAN and RICHARD HOLDAWAY
New Zealand Journal of Ecology
Vol. 12, SUPPLEMENT: Moas, mammals and climate in the ecological history of New Zealand (1989), pp. 97-101
Stable URL: http://www.jstor.org/stable/24053252
Page Count: 5
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
FOOTPRINT PRESSURES AND LOCOMOTION OF MOAS AND UNGULATES AND THEIR EFFECTS ON THE NEW ZEALAND INDIGENOUS BIOTA THROUGH TRAMPLING
Preview not available

Abstract

Foot area and structure, body weight and locomotion are compared in moas and ungulates to give estimates of pressure and edge loading when standing and moving. Moa foot pressures ranged from 0.15 kg/cm2 to 0.19 kg/cm2 which is very similar to those of emu feet. Red deer foot pressures were 0.395 kg/cm2, goat 0.430 kg/cm2, and tahr 0.35 kg/cm2. The differences in edge loadings were not so marked. During locomotion over soft ground, the ungulate hoof acts like a chisel, and as the toes splay out, the hoof edge shears the substratum. In contrast, the ratite foot is more flexible, and rolls off the ground causing little or no cutting damage with the edge. The action of the ungulate hoof is quantitatively and qualitatively different from that of moas in affecting the integrity of plants, animals, and substratum.

Page Thumbnails

  • Thumbnail: Page 
97
    97
  • Thumbnail: Page 
98
    98
  • Thumbnail: Page 
99
    99
  • Thumbnail: Page 
100
    100
  • Thumbnail: Page 
101
    101