| Convergent Evolution Driven by Similar Feeding Mechanics in Balaenopterid Whales and Pelicans. | |
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MedLine Citation:
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PMID: 21618438 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The feeding apparatuses of rorqual whales and pelicans exhibit a number of similarities, including long, kinetic jaws that increase gape size, and extensible tissue comprising the floor of the mouth. These specializations enable the engulfment of large volumes of prey-laden water in both taxa. However, the mechanics of engulfment feeding in rorquals and pelicans have never been quantitatively compared. Here, we use "BendCT," a novel analytical program, to investigate the mechanical design of rorqual and pelican mandibles, to understand whether these bones show comparable designs for resisting similar hydrodynamical loads. We also compare the mechanical properties of the extensible tissue used during engulfment in rorquals and pelicans. We demonstrate that the evolutionary convergence in the feeding apparatus of rorquals and pelicans is more pronounced than has been recognized previously; both taxa exhibit mandibular flexural rigidity distributions suited for resisting dorsoventral bending stresses encountered while feeding, and possess similarly extensible tissue on the floor of their mouths. Anat Rec,, 2011. © 2011 Wiley-Liss, Inc. |
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Authors:
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Daniel J Field; Sheng Chuan Lin; Micha Ben-Zvi; Jeremy A Goldbogen; Robert E Shadwick |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-25 |
Journal Detail:
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Title: Anatomical record (Hoboken, N.J. : 2007) Volume: - ISSN: 1932-8494 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-5-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101292775 Medline TA: Anat Rec (Hoboken) Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Wiley-Liss, Inc. |
Affiliation:
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Department of Geology and Geophysics, Yale University, 210 Whitney Avenue, New Haven, Connecticut; Department of Zoology, University of British Columbia, 6270 University Boulevard, Vancouver, British Columbia, Canada. daniel.field@yale.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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