1
40
2
-
Text
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n/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).
Pages
151-151
Volume
32
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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
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MORPHOLOGICAL EVOLUTION IN BASAL MESOEUCROCODYLIANS: TRACKING BODY SIZE AND DENTAL TRENDS IN NOTOSUCHIA
Publisher
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Journal of Vertebrate Paleontology
Date
A point or period of time associated with an event in the lifecycle of the resource
2012
2012
Subject
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Paleontology
Creator
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O'Connor P M; Hieronymus T L; Stevens N J; Sertich J J
Identifier
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n/a
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Journal Article
2012
Hieronymus T L
Journal Article
Journal of Vertebrate Paleontology
O'Connor P M
Paleontology
Sertich J J
Stevens N J
-
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/10.1002/jmor.10963" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/jmor.10963</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
958-971
Issue
8
Volume
272
Search for Full-text
Locate full-text within NEOMED Library's e-journal collections
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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
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Cross Sectional Geometry of the Forelimb Skeleton and Flight Mode in Pelecaniform Birds
Publisher
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Journal of Morphology
Date
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2011
2011-08
Subject
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allometry; Anatomy & Morphology; aves; behavior; cross-sectional geometry; evolution; flight; functional-morphology; Locomotion; long bones; pelecaniforms; phylogenies; regression; size; variables
Creator
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Simons E L R; Hieronymus T L; O'Connor P M
Description
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Avian wing elements have been shown to experience both dorsoventral bending and torsional loads during flapping flight. However, not all birds use continuous flapping as a primary flight strategy. The pelecaniforms exhibit extraordinary diversity in flight mode, utilizing flapping, flap-gliding, and soaring. Here we (1) characterize the cross-sectional geometry of the three main wing bone (humerus, ulna, carpometacarpus), (2) use elements of beam theory to estimate resistance to loading, and (3) examine patterns of variation in hypothesized loading resistance relative to flight and diving mode in 16 species of pelecaniform birds. Patterns emerge that are common to all species, as well as some characteristics that are flight-and diving-mode specific. In all birds examined, the distal most wing segment (carpometacarpus) is the most elliptical (relatively high I-max/I-min) at mid-shaft, suggesting a shape optimized to resist bending loads in a dorsoventral direction. As primary flight feathers attach at an oblique angle relative to the long axis of the carpometacarpus, they are likely responsible for inducing bending of this element during flight. Moreover, among flight modes examined the flapping group (cormorants) exhibits more elliptical humeri and carpometacarpi than other flight modes, perhaps pertaining to the higher frequency of bending loads in these elements. The soaring birds (pelicans and gannets) exhibit wing elements with near-circular cross-sections and higher polar moments of area than in the flap and flap-gliding birds, suggesting shapes optimized to offer increased resistance to torsional loads. This analysis of cross-sectional geometry has enhanced our interpretation of how the wing elements are being loaded and ultimately how they are being used during normal activities. J. Morphol. 272: 958-971, 2011. (C) 2011 Wiley-Liss, Inc.
Identifier
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<a href="http://doi.org/10.1002/jmor.10963" target="_blank" rel="noreferrer noopener">10.1002/jmor.10963</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2011
allometry
Anatomy & Morphology
aves
Behavior
cross-sectional geometry
Evolution
Flight
functional-morphology
Hieronymus T L
Journal Article
Journal of morphology
Locomotion
long bones
O'Connor P M
pelecaniforms
phylogenies
Regression
Simons E L R
size
variables