| Effects of Body Size and Shape on Locomotion in the Bat Star (Patiria miniata). | |
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MedLine Citation:
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PMID: 22815371 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Among taxa ranging from cnidarians to vertebrates, absolute speed of locomotion generally increases with increasing body size. Despite the unique mode of locomotion in echinoderms, crawling speed also appears to increase with increasing body size, at least in some species of asteroids and echinoids. We used an escape-response assay to assess how maximum crawling speed varied with body size in the bat star Patiria miniata. We also tested the effect of arm number on maximum crawling speed by comparing speeds of five- and six-armed individuals. Contrary to prior reports for a single sea urchin and sea star species, both absolute crawling speed and crawling speed relative to body size actually declined with increasing body mass, increasing arm length, and increasing oral surface area, in both five- and six-armed individuals. Arm number did not appear to have a significant effect on crawling speed. The reasons for this negative relationship between crawling speed and body size in P. miniata remain unclear, but we suspect that the disproportionate increase in body mass relative to total tube-foot cross-sectional area may make locomotion proportionally more difficult in larger-bodied sea stars. |
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Authors:
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Emaline M Montgomery; A Richard Palmer |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Biological bulletin Volume: 222 ISSN: 1939-8697 ISO Abbreviation: Biol. Bull. Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-07-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2984727R Medline TA: Biol Bull Country: United States |
Other Details:
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Languages: eng Pagination: 222-32 Citation Subset: IM |
Affiliation:
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Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9; and Bamfield Marine Sciences Centre, Bamfield, British Columbia, Canada V0R 1B0. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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