Fluctuating and directional asymmetry in the long bones of captive cotton‐top tamarins ( S aguinus oedipus )

Bibliographic Data

ID8317440
AuthorsNicole M Reeves (Department of Anatomy Ross University School of Medicine Portsmouth Dominica), Nicole Reeves (Knoxville College, corresponding author), B M Auerbach (0000-0002-3435-4427, Knoxville College), Adam D Sylvester (0000-0002-5234-074X, Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine Baltimore MD)
Year2016
Volume160
Issue1
Pages41-51
Publication date2016-05-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueAmerican Journal of Physical Anthropology (JOURNAL)
Journal identifiersISSN: 0002-9483 • E-ISSN: 1096-8644
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ajpa.22942
PMID26801822
OpenAlexW2404521643
LanguageEN
Citations received5
References cited97

OBJECTIVES: Skeletal asymmetries reflect developmental stability and mechanical, functional, and physiological influences on bone growth. In humans, researchers have documented the greatest limb bone bilateral asymmetry in diaphyseal breadths, with less asymmetry in articular and maximum length dimensions. However, it remains unclear as to whether the pattern observed for humans is representative of nonhuman primates, wherein bilateral loading may minimize directional asymmetry. This study adds to the small body of asymmetry data on nonhuman primates by investigating patterns of long bone asymmetry in a skeletal sample of Saguinus oedipus (cotton-top tamarin). MATERIALS AND METHODS: Humeri, radii, ulnae, femora, and tibiae of 76 adult captive cotton-top tamarin skeletons (48 males, 28 females) were measured bilaterally. We included maximum length, midshaft diaphyseal breadths, and at least one articular measurement for each bone to assess directional (DA) and fluctuating asymmetry (FA) in each dimension. RESULTS: Most dimensions exhibit significant FA, and very few have significant DA; DA is limited to the lower limb, especially in knee dimensions. Overall, the magnitudes of asymmetry in tamarins have a consistent ranking that follows the same pattern as found in humans. DISCUSSION: This first study of DA and FA among multiple dimensions throughout the limbs of a non-hominoid primate suggests that previously-reported patterns of human bilateral asymmetry are not exclusive to humans. The results further indicate potential underlying differences in constraints on variation within limb bones. While processes shaping variation await further study, our results argue that different long bone dimensions may reflect dissimilar evolutionary processes

Asymmetry · Biology · Physics · Zoology · Communication · Forensic Anthropology and Bioarchaeology Studies · Hemispheric Asymmetry in Neuroscience · Morphological variations and asymmetry · Psychology

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