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    Effects of turbulence on the feeding rate of a pelagic predator : the planktonic hydroid Clytia gracilis

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    AdamiketalJEMBE2006.pdf (291.4Kb)
    Date
    2005-12-14
    Author
    Adamik, Peter  Concept link
    Gallager, Scott M.  Concept link
    Horgan, Erich F.  Concept link
    Madin, Laurence P.  Concept link
    McGillis, Wade R.  Concept link
    Govindarajan, Annette F.  Concept link
    Alatalo, Philip  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/1167
    As published
    https://doi.org/10.1016/j.jembe.2005.12.006
    Keyword
     Turbulent mixing; Small-scale turbulence; Hydrozoa; Functional response 
    Abstract
    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.
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    • Biology
    Suggested Citation
    Preprint: Adamik, Peter, Gallager, Scott M., Horgan, Erich F., Madin, Laurence P., McGillis, Wade R., Govindarajan, Annette F., Alatalo, Philip, "Effects of turbulence on the feeding rate of a pelagic predator : the planktonic hydroid Clytia gracilis", 2005-12-14, https://doi.org/10.1016/j.jembe.2005.12.006, https://hdl.handle.net/1912/1167
     

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