Abstract
WHEN dissolved in water, the natural slimes of most of the fishes we have tested have a remarkable capacity to decrease greatly the friction of water when flowing in the turbulent state. In one species, a dilute solution of its slime was found to reduce the friction of water by as much as 65.9%; reductions of 57% to 63% were frequently obtained with the slimes of other species. These measurements have led us to the view that the slimes of many (but not all) fishes assist in locomotion by reducing the drag or resistance which water offers to their bodies.
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References
Rosen, M. W., and Cornford, N. E., Publication No. 193 of he Naval Undersea Research and Development Center, San Diego, California (1970).
Hoyt, J. W., Symp. Rheol. Amer. Soc. Mech. Eng., 71 (Washington DC, 1965).
Gero, D. R., The Hydrodynamic Aspects of Fish Propulsion (American Museum Novitates, American Museum of Natural History, New York, 1952).
Rosen, M. W., Publication No. 2298, Naval Ordnance Test Station, China Lake, California (1958).
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ROSEN, M., CORNFORD, N. Fluid Friction of Fish Slimes. Nature 234, 49–51 (1971). https://doi.org/10.1038/234049a0
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DOI: https://doi.org/10.1038/234049a0
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