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Permanent link (DOI): https://doi.org/10.7939/R3KP7TZ3M

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Three-Dimensional Bookstein Shape Coordinates and Functional Morphology of Passive Suspension Feeding in Composita (Brachiopoda, Athyridida) Open Access

Descriptions

Other title
Subject/Keyword
Functional morphology
Suspension feeding
Shape analysis
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Collins, Benjamin M. J.
Supervisor and department
Leighton, Lindsey R. (Earth and Atmospheric Sciences)
Examining committee member and department
Leys, Sally P. (Biological Sciences)
Zonneveld, J. P. (Earth and Atmospheric Sciences)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2013-12-04T10:25:39Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
The effects of shell morphology on passive fluid circulation are examined in Late Mississippian through Late Pennsylvanian Composita (Brachiopoda, Athyridida) from Texas, Kentucky, and Iowa. The first three-dimensional derivation of Bookstein shape coordinates is given in association with an in-depth discussion of the advantages and potential drawbacks of the technique for geometric shape analysis applications. Three-dimensional morphometric analysis of Composita shows a single shape distribution corresponding to progressive differentiation of the commissure into vertically displaced parasulcate, lateral, and sulcate gapes with increasing shell size, indicating an ontogenetic shape change trend. Gaping models of three specimens (including a simulated lophophore in the largest specimen) representative of different ontogenetic stages were used to observe the effects of morphology on passive flow circulation in a recirculating flume tank. All models showed medially-inhalant and laterally-exhalant passive circulation when oriented with the sulcus facing upstream, with more vigorous flow associated with increasing shell size.
Language
English
DOI
doi:10.7939/R3KP7TZ3M
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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