| Scaling of suction-induced flows in bluegill: morphological and kinematic predictors for the ontogeny of feeding performance. | |
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MedLine Citation:
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PMID: 18689419 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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During ontogeny, animals undergo changes in size and shape that result in shifts in performance, behavior and resource use. These ontogenetic changes provide an opportunity to test hypotheses about how the growth of structures affects biological functions. In the present study, we ask how ontogenetic changes in skull biomechanics affect the ability of bluegill sunfish, a high-performance suction feeder, to produce flow speeds and accelerations during suction feeding. The flow of water in front of the mouth was measured directly for fish ranging from young-of-year to large adults, using digital particle imaging velocimetry (DPIV). As bluegill size increased, the magnitude of peak flow speed they produced increased, and the effective suction distance increased because of increasing mouth size. However, throughout the size range, the timing of peak fluid speed remained unchanged, and flow was constrained to approximately one gape distance from the mouth. The observed scaling relationships between standard length and peak flow speed conformed to expectations derived from two biomechanical models, one based on morphological potential to produce suction pressure (the Suction Index model) and the other derived from a combination of morphological and kinematic variables (the Expanding Cone model). The success of these models in qualitatively predicting the observed allometry of induced flow speed reveals that the scaling of cranial morphology underlies the scaling of suction performance in bluegill. |
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Authors:
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Roi Holzman; David C Collar; Steven W Day; Kristin L Bishop; Peter C Wainwright |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The Journal of experimental biology Volume: 211 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2008 Aug |
Date Detail:
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Created Date: 2008-08-11 Completed Date: 2008-10-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 2658-68 Citation Subset: IM |
Affiliation:
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Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, CA 95616, USA. raholzman@ucdavis.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biomechanics Feeding Behavior / physiology* Jaw / physiology Models, Biological Perciformes / growth & development*, physiology* Rheology Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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