Journal article
On the reorientation of non-spherical prey particles in a feeding current
Potentially, non-spherical prey can be re-oriented in a flow field and impact on the predator's feeding structures in a non- random manner. Herein, we quantify a process whereby this passive reorientation occurs, and present a model that predicts the orientation of a spheroidal prey as a function of its shape, size and the characteristics of the fluid flow For a radial flow field, elongated prey tend to align with their long axis parallel to streamlines.
This theory is well supported by our results from a laboratory study of cylindrical particles in a siphon flow. The model is extended to a more realistic representation of copepod feeding currents. In this context, the spatial scale over which this process is active is proportional to epsilon (-1/4) where epsilon is the turbulent dissipation rate.
For a range of natural turbulence levels, re- orientation efficiency can range from >90% (low turbulence) to
Language: | English |
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Year: | 2000 |
Pages: | 761-777 |
ISSN: | 14643774 and 01427873 |
Types: | Journal article |
DOI: | 10.1093/plankt/22.4.761 |
ORCIDs: | Visser, Andre |