The mechanical power required by Nymphon for swimming at constant depth has been calculated from drag forces acting on the legs. For an adult male this was found to be 3.4 W kg. Only about 60% of this is used to support the animal's weight in water.
The metabolic rate fluctuates spontaneously over a tidal cycle, being greatest during the ebb-tide period. The mean rate of oxygen consumption during the animals least active phase was found to be about 0.1 μlO2 mg−1 h−1.
The total carbohydrate and lipid immediately available for combustion have been estimated at 4.64 and 16 μg/mg wet wt respectively. These quantities should be adequate for about 42 h periodic swimming in an adult Nymphon.
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JOURNAL ARTICLE| 01 December 1977
The Swimming of Nymphon Gracile (Pycnogonida): The Energetics of Swimming at Constant Depth
1 Department of Zoology and Comparative Physiology, University of Birmingham
Revision Received: 29 Apr 1977
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1977 by Company of Biologists
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ELFED MORGAN; The Swimming of Nymphon Gracile (Pycnogonida): The Energetics of Swimming at Constant Depth. J Exp Biol 1 December 1977; 71 (1): 205–211. doi: https://doi.org/10.1242/jeb.71.1.205
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