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Mechanics and energetics of swimming in the small copepod Acanthocyclops robustus (Cyclopoida)

Mechanics and energetics of swimming in the small copepod Acanthocyclops robustus (Cyclopoida) 227 107 107 1 1 M. J. Morris K. Kohlhage G. Gust Ocean Optics, Inc. 34698 Dunedin Florida USA Zoologisches Institut Universität Münster D-4400 Münster FRG Department of Marine Science University of South Florida 33701-5016 St. Petersburg Florida USA Abstract High-speed films of swimming Acanthocyclops robustus were used to test a crustacean swimming-model based on numerical analysis of thrust production. Predicted body velocities and jump distances were usually within 75% of those observed. Most of the thrust which propels. A. robustus is produced by movements of the 2nd, 3rd, and 4th thoracic swimming legs, with only small contributions from the first thoracic swimming legs. A model analyzed without the first antennae suggested that the antennae do not produce significant thrust. The leg and antennal movements could be described with trigonometric equations (cosine curves), but were best described by polynomial fits of position vs time data from the films. Patterns of swimming velocity varied among four episodes that were modeled, and followed differences in swimming-leg motions. Model results for the small (cephalothorax length = 0.6 mm) cyclopoid A. robustus and those which have been reported for the large calanoid copepod Pleuromamma xiphias and other swimmers indicate that mechanical efficiency (30%) does not scale with body size, whereas jump distance (one body length), proportion of thrust generated by hydrodynamic added mass (70%), and net cost of transport, C p (40 to 109 cal g −1 km −1 ) do. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Mechanics and energetics of swimming in the small copepod Acanthocyclops robustus (Cyclopoida)

Morris, M.; Kohlhage, K.; Gust, G.
Marine Biology , Volume 107 (1) – Feb 1, 1990
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References (26)

Publisher
Springer Journals
Copyright
Copyright © 1990 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF01313245
Publisher site
See Article on Publisher Site

Abstract

227 107 107 1 1 M. J. Morris K. Kohlhage G. Gust Ocean Optics, Inc. 34698 Dunedin Florida USA Zoologisches Institut Universität Münster D-4400 Münster FRG Department of Marine Science University of South Florida 33701-5016 St. Petersburg Florida USA Abstract High-speed films of swimming Acanthocyclops robustus were used to test a crustacean swimming-model based on numerical analysis of thrust production. Predicted body velocities and jump distances were usually within 75% of those observed. Most of the thrust which propels. A. robustus is produced by movements of the 2nd, 3rd, and 4th thoracic swimming legs, with only small contributions from the first thoracic swimming legs. A model analyzed without the first antennae suggested that the antennae do not produce significant thrust. The leg and antennal movements could be described with trigonometric equations (cosine curves), but were best described by polynomial fits of position vs time data from the films. Patterns of swimming velocity varied among four episodes that were modeled, and followed differences in swimming-leg motions. Model results for the small (cephalothorax length = 0.6 mm) cyclopoid A. robustus and those which have been reported for the large calanoid copepod Pleuromamma xiphias and other swimmers indicate that mechanical efficiency (30%) does not scale with body size, whereas jump distance (one body length), proportion of thrust generated by hydrodynamic added mass (70%), and net cost of transport, C p (40 to 109 cal g −1 km −1 ) do.

Journal

Marine Biology – Springer Journals

Published: Feb 1, 1990

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