1
40
1
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1111/joa.12220" target="_blank" rel="noreferrer noopener">http://doi.org/10.1111/joa.12220</a>
Pages
403–418
Issue
4
Volume
225
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Limb bone morphology, bone strength, and cursoriality in lagomorphs.
Publisher
An entity responsible for making the resource available
Journal of anatomy
Date
A point or period of time associated with an event in the lifecycle of the resource
2014
2014-10
Subject
The topic of the resource
*Arm Bones/anatomy & histology/physiology; *Lagomorpha/anatomy & histology/physiology; *Leg Bones/anatomy & histology/physiology; *Tensile Strength; Animals; Bone Density/physiology; Mechanical; mechanical advantage; mineralization; Pliability; polar section modulus; robusticity; Running/*physiology; safety factor; Stress; Tomography; X-Ray Computed
Creator
An entity primarily responsible for making the resource
Young Jesse W; Danczak Robert; Russo Gabrielle A; Fellmann Connie D
Description
An account of the resource
The primary aim of this study is to broadly evaluate the relationship between cursoriality (i.e. anatomical and physiological specialization for running) and limb bone morphology in lagomorphs. Relative to most previous studies of cursoriality, our focus on a size-restricted, taxonomically narrow group of mammals permits us to evaluate the degree to which 'cursorial specialization' affects locomotor anatomy independently of broader allometric and phylogenetic trends that might obscure such a relationship. We collected linear morphometrics and muCT data on 737 limb bones covering three lagomorph species that differ in degree of cursoriality: pikas (Ochotona princeps, non-cursorial), jackrabbits (Lepus californicus, highly cursorial), and rabbits (Sylvilagus bachmani, level of cursoriality intermediate between pikas and jackrabbits). We evaluated two hypotheses: cursoriality should be associated with (i) lower limb joint mechanical advantage (i.e. high 'displacement advantage', permitting more cursorial species to cycle their limbs more quickly) and (ii) longer, more gracile limb bones, particularly at the distal segments (as a means of decreasing rotational inertia). As predicted, highly cursorial jackrabbits are typically marked by the lowest mechanical advantage and the longest distal segments, non-cursorial pikas display the highest mechanical advantage and the shortest distal segments, and rabbits generally display intermediate values for these variables. Variation in long bone robusticity followed a proximodistal gradient. Whereas proximal limb bone robusticity declined with cursoriality, distal limb bone robusticity generally remained constant across the three species. The association between long, structurally gracile limb bones and decreased maximal bending strength suggests that the more cursorial lagomorphs compromise proximal limb bone integrity to improve locomotor economy. In contrast, the integrity of distal limb bones is maintained with increasing cursoriality, suggesting that the safety factor takes priority over locomotor economy in those regions of the postcranial skeleton that experience higher loading during locomotion. Overall, these findings support the hypothesis that cursoriality is associated with a common suite of morphological adaptations across a range of body sizes and radiations.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1111/joa.12220" target="_blank" rel="noreferrer noopener">10.1111/joa.12220</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Arm Bones/anatomy & histology/physiology
*Lagomorpha/anatomy & histology/physiology
*Leg Bones/anatomy & histology/physiology
*Tensile Strength
2014
Animals
Bone Density/physiology
Danczak Robert
Department of Anatomy & Neurobiology
Fellmann Connie D
Journal of anatomy
Mechanical
mechanical advantage
mineralization
NEOMED College of Medicine
Pliability
polar section modulus
robusticity
Running/*physiology
Russo Gabrielle A
safety factor
Stress
Tomography
X-Ray Computed
Young Jesse W