Geometry and parallelism in the long bones of rodents and ungulates

Adrià Casinos; Oscar Rocha-Barbosa; Eloy Gálvez-López

doi:10.1016/j.cbpa.2009.04.174

Geometry and parallelism in the long bones of rodents and ungulates

Adrià Casinos, Oscar Rocha-Barbosa, Eloy Gálvez-López

Archaeology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Morphological parallelism between South American hystricomorph rodents and small ungulates from the Old World has been postulated for a long time. This research deals with this question from the point of view of biomechanical characteristics of the long bones. For that, cross-sectional area, second moment of area, polar moment, athletic ability indicators and strength were calculated for the long bones (humerus, radius, femur and tibia) of 5 species of Cavioidea and 2 species of Artiodactyla. Regressions of each of these variables to body mass were carried out. Regarding the cross-sectional area, the confidence intervals show that the exponents calculated are always higher than the value predicted by geometrical similarity, except in the case of the femur, while exponents obtained for the second moment of area or the polar moment are not significantly different from the predicted values, except for humerus and tibia. The two indicators of athletic ability scaled as expected, except the humerus
and tibia axial indicators. The exponent calculated for femur strength is not different from 0, while in the case of the humerus, strength decreases slightly with body mass. Additional statistical tests show no difference between the values of these parameters calculated for the studied samples of artiodactyls and rodents. The present results are consistent with the hypothesis that the parallelism between hystricomorph rodents and small ungulates is very important.

Original language	English
Title of host publication	Comparative Biochemistry and Physiology
Subtitle of host publication	Part A: Molecular & Integrative Physiology
Pages	S115
Volume	153
ISBN (Electronic)	1095-6433
DOIs	https://doi.org/10.1016/j.cbpa.2009.04.174
Publication status	Published - 2009
Event	Society for Experimental Biology: Annual Main Meeting - Glasgow, United Kingdom Duration: 28 Jun 2009 → 1 Jul 2009

Conference

Conference	Society for Experimental Biology
Abbreviated title	SEB @Glasgow
Country/Territory	United Kingdom
City	Glasgow
Period	28/06/09 → 1/07/09

Access to Document

10.1016/j.cbpa.2009.04.174

Cite this

@inproceedings{7308dbde91c647d3be8ae10e376e372a,

title = "Geometry and parallelism in the long bones of rodents and ungulates",

abstract = "Morphological parallelism between South American hystricomorph rodents and small ungulates from the Old World has been postulated for a long time. This research deals with this question from the point of view of biomechanical characteristics of the long bones. For that, cross-sectional area, second moment of area, polar moment, athletic ability indicators and strength were calculated for the long bones (humerus, radius, femur and tibia) of 5 species of Cavioidea and 2 species of Artiodactyla. Regressions of each of these variables to body mass were carried out. Regarding the cross-sectional area, the confidence intervals show that the exponents calculated are always higher than the value predicted by geometrical similarity, except in the case of the femur, while exponents obtained for the second moment of area or the polar moment are not significantly different from the predicted values, except for humerus and tibia. The two indicators of athletic ability scaled as expected, except the humerusand tibia axial indicators. The exponent calculated for femur strength is not different from 0, while in the case of the humerus, strength decreases slightly with body mass. Additional statistical tests show no difference between the values of these parameters calculated for the studied samples of artiodactyls and rodents. The present results are consistent with the hypothesis that the parallelism between hystricomorph rodents and small ungulates is very important.",

author = "Adri{\`a} Casinos and Oscar Rocha-Barbosa and Eloy G{\'a}lvez-L{\'o}pez",

year = "2009",

doi = "10.1016/j.cbpa.2009.04.174",

language = "English",

volume = "153",

pages = "S115",

booktitle = "Comparative Biochemistry and Physiology",

note = "Society for Experimental Biology : Annual Main Meeting, SEB @Glasgow ; Conference date: 28-06-2009 Through 01-07-2009",

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TY - GEN

T1 - Geometry and parallelism in the long bones of rodents and ungulates

AU - Casinos, Adrià

AU - Rocha-Barbosa, Oscar

AU - Gálvez-López, Eloy

PY - 2009

Y1 - 2009

N2 - Morphological parallelism between South American hystricomorph rodents and small ungulates from the Old World has been postulated for a long time. This research deals with this question from the point of view of biomechanical characteristics of the long bones. For that, cross-sectional area, second moment of area, polar moment, athletic ability indicators and strength were calculated for the long bones (humerus, radius, femur and tibia) of 5 species of Cavioidea and 2 species of Artiodactyla. Regressions of each of these variables to body mass were carried out. Regarding the cross-sectional area, the confidence intervals show that the exponents calculated are always higher than the value predicted by geometrical similarity, except in the case of the femur, while exponents obtained for the second moment of area or the polar moment are not significantly different from the predicted values, except for humerus and tibia. The two indicators of athletic ability scaled as expected, except the humerusand tibia axial indicators. The exponent calculated for femur strength is not different from 0, while in the case of the humerus, strength decreases slightly with body mass. Additional statistical tests show no difference between the values of these parameters calculated for the studied samples of artiodactyls and rodents. The present results are consistent with the hypothesis that the parallelism between hystricomorph rodents and small ungulates is very important.

AB - Morphological parallelism between South American hystricomorph rodents and small ungulates from the Old World has been postulated for a long time. This research deals with this question from the point of view of biomechanical characteristics of the long bones. For that, cross-sectional area, second moment of area, polar moment, athletic ability indicators and strength were calculated for the long bones (humerus, radius, femur and tibia) of 5 species of Cavioidea and 2 species of Artiodactyla. Regressions of each of these variables to body mass were carried out. Regarding the cross-sectional area, the confidence intervals show that the exponents calculated are always higher than the value predicted by geometrical similarity, except in the case of the femur, while exponents obtained for the second moment of area or the polar moment are not significantly different from the predicted values, except for humerus and tibia. The two indicators of athletic ability scaled as expected, except the humerusand tibia axial indicators. The exponent calculated for femur strength is not different from 0, while in the case of the humerus, strength decreases slightly with body mass. Additional statistical tests show no difference between the values of these parameters calculated for the studied samples of artiodactyls and rodents. The present results are consistent with the hypothesis that the parallelism between hystricomorph rodents and small ungulates is very important.

U2 - 10.1016/j.cbpa.2009.04.174

DO - 10.1016/j.cbpa.2009.04.174

M3 - Conference contribution

VL - 153

SP - S115

BT - Comparative Biochemistry and Physiology

T2 - Society for Experimental Biology

Y2 - 28 June 2009 through 1 July 2009

ER -