Publication Date:
2022-05-25
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.
Description:
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:
P. Adamík received support from the WHOI Academic Programs Office via the 2002
Summer Student Fellowship and while writing this paper from the Ministry of Education of the
Czech Republic (MSM 6198959212 and MSM 153100012).
Keywords:
Turbulent mixing
;
Small-scale turbulence
;
Hydrozoa
;
Functional response
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
298459 bytes
Format:
application/pdf
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