| Biomechanics and energy cost of the amphipod Corophium volutator filter-pump. | |
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MedLine Citation:
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PMID: 17438203 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The integrated function of the setal filter-basket and the pleopodal pump in the burrowing amphipod Corophium volutator was studied by video-microscopy in order to evaluate the energy costs of filter feeding. Video-microscope observations indicated that, in general, nine short, water-pumping beat cycles of the pleopods are succeeded by one slow cycle that coincides with cleaning of the setal filter and transient slowdown of inhalant water velocity. The position of the plumose setal filter on the second pair of gnathopods ensures that all water runs through the filter-basket. The fine V-shaped bristles on the setae enlarge the total filter area so that the velocity of water flowing through the filter is relatively slow, about 2.5 mm s(-1), giving rise to a resistance of about 2.9 mm H(2)O, which is the most important contribution to the total pressure drop in the system. In "standard" individuals of C. volutator with lengths of 3 and 6 mm, the normal operating pump pressure and pumping rate were, respectively, 2.6 and 3.1 mm H(2)O, and 18.3 and 85.5 ml h(-1); the overall pump efficiencies were 5.1% and 11.6%, respectively. These results show that the Corophium filter-pump is comparable to other low-pressure biological pumps in filter-feeding marine invertebrates, such as mussels, polychaetes, ascidians, and bryozoans. |
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Authors:
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Hans Ulrik Riisgård |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Biological bulletin Volume: 212 ISSN: 0006-3185 ISO Abbreviation: Biol. Bull. Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-04-17 Completed Date: 2007-08-15 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: 104-14 Citation Subset: IM |
Affiliation:
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Marine Biological Research Centre, University of Southern Denmark, Hindsholmvej 11, DK-5300 Kerteminde, Denmark. hur@biology.sdu.dk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amphipoda
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anatomy & histology,
physiology* Animals Biomechanics Denmark Energy Metabolism / physiology* Feeding Behavior / physiology* Microscopy, Video Pressure Water Movements |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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