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<a href="http://doi.org/10.1002/ar.24045" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ar.24045</a>
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Title
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Getting into Shape: Limb Bone Strength in Perinatal Lemur catta and Propithecus coquereli.
Publisher
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Anatomical record (Hoboken, N.J. : 2007)
Date
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2018
2018-12
Subject
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cross-sectional geometry; material properties; ontogeny; quadrupedalism; vertical clinging and leaping
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Young Jesse W; Jankord Kathryn; Saunders Marnie M; Smith Timothy D
Description
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Functional studies of skeletal anatomy are predicated on the fundamental assumption that form will follow function. For instance, previous studies have shown that the femora of specialized leaping primates are more robust than those of more generalized primate quadrupeds. Are such differences solely a plastic response to differential loading patterns during postnatal life, or might they also reflect more canalized developmental mechanisms present at birth? Here, we show that perinatal Lemur catta, an arboreal/terrestrial quadruped, have less robust femora than perinatal Propithecus coquereli, a closely related species specialized for vertical clinging and leaping (a highly unusual locomotor mode in which the hindlimbs are used to launch the animal between vertical tree trunks). These results suggest that functional differences in long bone cross-sectional dimensions are manifest at birth, belying simple interpretations of adult postcranial form as a direct record of loading patterns during postnatal life. Despite these significant differences in bone robusticity, we find that hindlimb bone mineralization, material properties, and measures of whole-bone strength generally overlap in perinatal L. catta and P. coquereli, indicating little differentiation in postcranial maturity at birth despite known differences in the pace of craniodental development between the species. In a broader perspective, our results likely reflect evolution acting during prenatal ontogeny. Even though primates are notable for relatively prolonged gestation and postnatal parental care, neonates are not buffered from selection, perhaps especially in the unpredictable and volatile environment of Madagascar. Anat Rec, 2018. (c) 2018 Wiley Periodicals, Inc.
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<a href="http://doi.org/10.1002/ar.24045" target="_blank" rel="noreferrer noopener">10.1002/ar.24045</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2018
Anatomical record (Hoboken, N.J. : 2007)
cross-sectional geometry
Department of Anatomy & Neurobiology
Jankord Kathryn
material properties
NEOMED College of Medicine
ontogeny
quadrupedalism
Saunders Marnie M
Smith Timothy D
vertical clinging and leaping
Young Jesse W