Skip to main content
Journal cover image

Single-limb force data for two lemur species while vertically clinging.

Publication ,  Journal Article
Johnson, LE; Hanna, J; Schmitt, D
Published in: American journal of physical anthropology
November 2015

Vertical clinging and climbing have been integral to hypotheses about primate origins, yet little is known about how an animal with nails instead of claws resists gravity while on large, vertical, and cylindrical substrates. Here we test models of how force is applied to maintain posture, predicting (1) the shear component force (Fs ) at the hands will be higher than the feet; (2) the normal component force (Fn ) at the feet will be relatively high compared to the hands; (3) the component force resisting gravity (Fg ) at the feet will be relatively high compared to the hands; (4) species with a high frequency of vertical clinging postures will have low Fg at the hands due to relatively short forelimbs.Using a novel instrumented support, single-limb force data were collected during clinging postures for the hands and feet and compared across limbs and species for Propithecus verreauxi (N = 2), a habitual vertical clinger and leaper, and Varecia variegata (N = 3), a habitual above-branch arboreal quadruped.For both species, hand Fs were significantly higher than at the feet and Fn and Fg at the feet were significantly higher than at the hands. Between species, P. verreauxi has relatively low Fg at the hands and Fn at the feet than V. vareigata.These results support previous models and show that hindlimb loading dominance, characteristic of primate locomotion, is found during clinging behaviors and may allow the forelimbs to be used for foraging while clinging. These findings provide insight into selective pressures on force distribution in primates and primate locomotor evolution.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

American journal of physical anthropology

DOI

EISSN

1096-8644

ISSN

0002-9483

Publication Date

November 2015

Volume

158

Issue

3

Start / End Page

463 / 474

Related Subject Headings

  • Strepsirhini
  • Posture
  • Locomotion
  • Hindlimb
  • Forelimb
  • Biomechanical Phenomena
  • Anthropology, Physical
  • Anthropology
  • Animals
  • 4401 Anthropology
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Johnson, L. E., Hanna, J., & Schmitt, D. (2015). Single-limb force data for two lemur species while vertically clinging. American Journal of Physical Anthropology, 158(3), 463–474. https://doi.org/10.1002/ajpa.22803
Johnson, Laura E., Jandy Hanna, and Daniel Schmitt. “Single-limb force data for two lemur species while vertically clinging.American Journal of Physical Anthropology 158, no. 3 (November 2015): 463–74. https://doi.org/10.1002/ajpa.22803.
Johnson LE, Hanna J, Schmitt D. Single-limb force data for two lemur species while vertically clinging. American journal of physical anthropology. 2015 Nov;158(3):463–74.
Johnson, Laura E., et al. “Single-limb force data for two lemur species while vertically clinging.American Journal of Physical Anthropology, vol. 158, no. 3, Nov. 2015, pp. 463–74. Epmc, doi:10.1002/ajpa.22803.
Johnson LE, Hanna J, Schmitt D. Single-limb force data for two lemur species while vertically clinging. American journal of physical anthropology. 2015 Nov;158(3):463–474.
Journal cover image

Published In

American journal of physical anthropology

DOI

EISSN

1096-8644

ISSN

0002-9483

Publication Date

November 2015

Volume

158

Issue

3

Start / End Page

463 / 474

Related Subject Headings

  • Strepsirhini
  • Posture
  • Locomotion
  • Hindlimb
  • Forelimb
  • Biomechanical Phenomena
  • Anthropology, Physical
  • Anthropology
  • Animals
  • 4401 Anthropology