Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)

A primary requirement of the mammalian skull is to exert forces on different foods and to resist the forces imposed on it during feeding. Skull shape patterns within and among mammals are generally well known, but the biomechanical relevance of this variation remains limited for some groups. By inte...

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Detalles Bibliográficos
Autores principales: Hendges, Carla D., Patterson, Bruce D., Cáceres, Nilton C., Gasparini, Germán Mariano, Ross, Callum F.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Naturales
biomechanics
Chacoan peccary
collared peccary
functional morphology
geometric morphometrics
mandible
Tayassuidae
white-lipped peccary
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131249
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131249
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
biomechanics
Chacoan peccary
collared peccary
functional morphology
geometric morphometrics
mandible
Tayassuidae
white-lipped peccary
spellingShingle Ciencias Naturales
biomechanics
Chacoan peccary
collared peccary
functional morphology
geometric morphometrics
mandible
Tayassuidae
white-lipped peccary
Hendges, Carla D.
Patterson, Bruce D.
Cáceres, Nilton C.
Gasparini, Germán Mariano
Ross, Callum F.
Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
topic_facet Ciencias Naturales
biomechanics
Chacoan peccary
collared peccary
functional morphology
geometric morphometrics
mandible
Tayassuidae
white-lipped peccary
description A primary requirement of the mammalian skull is to exert forces on different foods and to resist the forces imposed on it during feeding. Skull shape patterns within and among mammals are generally well known, but the biomechanical relevance of this variation remains limited for some groups. By integrating geometric morphometric and biomechanical analyses, we test the hypothesis that skull shape in peccaries reflects biomechanical attributes to generate and dissipate powerful forces, presumably in response to tough foods. We obtained skull shape and size from 213 specimens of the three living peccary species and estimated bite force, bite stress at molars, bending and shear stress on the mandibular corpus, and condylar stress. We found larger estimated bite forces, greater resistance to bending loads, and lower stress emerging from the larger muscle attachment areas and shorter and deeper mandibular corpora for both <i>Pecari tajacu</i> and <i>Tayassu pecari</i> relative to <i>Parachoerus wagneri</i>. Peccaries (<i>P. tajacu</i> and <i>T. pecari</i>) with more powerful biomechanical attributes feed mainly on tougher foods (e.g., palm fruits). These results support the hypothesis that species eating tough foods tend to have a feeding morphology mechanically adapted to stronger bites and greater biting resistance, which must be closely reflected in their craniomandibular shape.
format Articulo
Articulo
author Hendges, Carla D.
Patterson, Bruce D.
Cáceres, Nilton C.
Gasparini, Germán Mariano
Ross, Callum F.
author_facet Hendges, Carla D.
Patterson, Bruce D.
Cáceres, Nilton C.
Gasparini, Germán Mariano
Ross, Callum F.
author_sort Hendges, Carla D.
title Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
title_short Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
title_full Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
title_fullStr Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
title_full_unstemmed Skull shape and the demands of feeding: a biomechanical study of peccaries (Mammalia, Cetartiodactyla)
title_sort skull shape and the demands of feeding: a biomechanical study of peccaries (mammalia, cetartiodactyla)
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/131249
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AT caceresniltonc skullshapeandthedemandsoffeedingabiomechanicalstudyofpeccariesmammaliacetartiodactyla
AT gasparinigermanmariano skullshapeandthedemandsoffeedingabiomechanicalstudyofpeccariesmammaliacetartiodactyla
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