Effects of turbulence on the feeding rate of a pelagic predator : the planktonic hydroid Clytia gracilis
Citable URI
https://hdl.handle.net/1912/1167As published
https://doi.org/10.1016/j.jembe.2005.12.006Abstract
Relatively little is known about the role of turbulence in a predator - prey system where the
predator is a passive, pelagic forager. The Campanulariid hydroid Clytia gracilis (Cnidaria,
Hydrozoa) is unusual because it occurs as planktonic colonies and is reported to forage passively
in the water column on Georges Bank, Massachusetts, USA. In this study we investigated the role
of various turbulence conditions on the feeding rate of C. gracilis colonies in laboratory
experiments. We found a positive relationship between turbulence velocities and feeding rates up
to a turbulent energy dissipation rate of ca 1 cm2 s-3. Beyond this threshold feeding rate decreased
slightly, indicating a dome-shaped relationship. Additionally, a negative relationship was found
between feeding efficiency and hydroid colony size under lower turbulent velocities, but this
trend was not significant under higher turbulence regimes.
Description
Author Posting. © The Authors, 2005. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Experimental Marine Biology and Ecology 333 (2006): 159-165, doi:10.1016/j.jembe.2005.12.006.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Entrainment and mixed layer dynamics of a surface-stress-driven stratiified fluid
(2014-12)We consider experimentally an initially quiescent and linearly stratified fluid with buoyancy frequency NQ in a cylinder subject to surface-stress forcing from a disc of radius R spinning at a constant angular velocity Ω. ... -
A study of the velocity structure in a marine boundary layer : instrumentation and observations
(Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1978-02)The design and operation of a unique flow measuring instrument for bottom boundary layer studies in the marine environment is documented. The effectiveness of the instrument in acquiring data with which models of near ... -
Inhibited upper ocean restratification in nonequilibrium swell conditions
(John Wiley & Sons, 2013-07-30)Diurnal restratification of the ocean surface boundary layer (OSBL) represents a competition between mixing of the OSBL and solar heating. Langmuir turbulence (LT) is a mixing process in the OSBL, driven by wind and surface ...
