From viscous to inertial forces : defining the limits of hydrodynamic regimes for larval fishes ...
The larval period in fishes is characterized by rapid growth which produces significant changes in the hydrodynamic conditions during swimming. The point of this study was to examine the changes in hydro-dynamic forces that act on red drum larvae, Sciaenops ocellatus, and to identify the hydrodynami...
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| Format: | Thesis |
| Language: | English |
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The University of Texas at Austin
2005
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| Online Access: | https://dx.doi.org/10.26153/tsw/54898 https://repositories.lib.utexas.edu/handle/2152/128363 |
| Summary: | The larval period in fishes is characterized by rapid growth which produces significant changes in the hydrodynamic conditions during swimming. The point of this study was to examine the changes in hydro-dynamic forces that act on red drum larvae, Sciaenops ocellatus, and to identify the hydrodynamic transition points throughout their development. I experimentally altered hydrodynamic conditions by changing the size of the fish under study (5-6 mm, 8 - 9.5 mm, 13 - 15.5 mm, and 29 - 35 mm in total length) and the kinematic viscosity of test solutions (0.8, 1.2, 1.6, and 2.0 x 10⁶ m² s⁻¹), in order to achieve a wide range of Reynolds numbers based on body length (ReL ranged from 12 to 4695). Five kinematic variables (swim-ming speed, stride length, tail-beat frequency, transverse tail speed, and tail amplitude) were measured for fish swimming at a constant speed along a linear path. Within a size class, increases in fluid kinematic viscosity reduced only swimming speed and stride length and only for the two ... |
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