Asymmetrical gait kinematics of free-ranging callitrichines in response to changes in substrate diameter and orientation.

Title

Asymmetrical gait kinematics of free-ranging callitrichines in response to changes in substrate diameter and orientation.

Creator

Dunham Noah T; McNamara Allison; Shapiro Liza J; Phelps Taylor; Young Jesse W

Publisher

The Journal of experimental biology

Date

2020
2020-05-15

Description

Arboreal environments present considerable biomechanical challenges for animals moving and foraging among substrates varying in diameter, orientation, and compliance. Most studies of quadrupedal gait kinematics in primates and other arboreal mammals have focused on symmetrical walking gaits and the significance of diagonal sequence gaits. Considerably less research has examined asymmetrical gaits, despite their prevalence in small-bodied arboreal taxa. Here we examine whether and how free-ranging callitrichine primates adjust asymmetrical gait kinematics to changes in substrate diameter and orientation, as well as how variation in gait kinematics affects substrate displacement. We used high-speed video to film free-ranging Saguinus tripartitus and Cebuella pygmaea inhabiting the Tiputini Biodiversity Station, Ecuador. We found that Saguinus used bounding and half-bounding gaits on larger substrates versus gallops and symmetrical gaits on smaller substrates, and also shifted several kinematic parameters consistent with attenuating forces transferred from the animal to the substrate. Similarly, Cebuella shifted from high impact bounding gaits on larger substrates to using more half-bounding gaits on smaller substrates; however, kinematic adjustments to substrate diameter were not as profound as in Saguinus Both species adjusted gait kinematics to changes in substrate orientation; however, gait kinematics did not significantly affect empirical measures of substrate displacement in either species. Due to their small body size, claw-like nails, and reduced grasping capabilities, callitrichines arguably represent extant biomechanical analogues for an early stage in primate evolution. As such, greater attention should be placed on understanding asymmetrical gait dynamics for insight into hypotheses concerning early primate locomotor evolution.

Subject

locomotion; Primate; Stability

Identifier

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Format

journalArticle

Search for Full-text

Users with a NEOMED Library login can search for full-text journal articles at the following url: https://libraryguides.neomed.edu/home

ISSN

1477-9145 0022-0949

NEOMED College

NEOMED College of Medicine

NEOMED Department

NEOMED Student Publications
Department of Anatomy & Neurobiology

Update Year & Number

June 2020 Update II

Citation

Dunham Noah T; McNamara Allison; Shapiro Liza J; Phelps Taylor; Young Jesse W, “Asymmetrical gait kinematics of free-ranging callitrichines in response to changes in substrate diameter and orientation.,” NEOMED Bibliography Database, accessed June 14, 2021, https://neomed.omeka.net/items/show/11096.

Social Bookmarking