To eat and not be eaten : optimal foraging behaviour in suspension feeding copepods


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dc.contributor.author Kiørboe, Thomas
dc.contributor.author Jiang, Houshuo
dc.date.accessioned 2012-11-01T16:17:46Z
dc.date.available 2012-11-01T16:17:46Z
dc.date.issued 2012-08
dc.identifier.uri http://hdl.handle.net/1912/5496
dc.description Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of The Royal Society for personal use, not for redistribution. The definitive version was published in Journal of The Royal Society Interface 6 (2013): 20120693, doi:10.1098/rsif.2012.0693. en_US
dc.description.abstract Zooplankton feed on microscopic prey that they either entrain in a feeding current or encounter as they cruise through the water. They generate fluid disturbances as they feed and move, thus elevating their risk of being detected and encountered by predators. Different feeding modes generate different hydrodynamic signals to predators and different predator encounter speeds but may also differ in their efficiency; the optimal behaviour is that which maximizes the net energy gain over the predation risk. Here, we show by means of flow visualization and simple hydrodynamic and optimization models that copepods with a diversity of feeding behaviours converge on optimal, size-independent specific clearance rates that are consistent with observed clearance rates of zooplankton, irrespective of feeding mode, species and size. We also predict magnitudes and size-scaling of swimming speeds that are consistent with observations. The rationalization of the magnitude and scaling of the clearance rates of zooplankton makes it more suitable for development of models of marine ecosystems, and is particularly relevant in predicting the size structure and biomass of pelagic communities. en_US
dc.description.sponsorship The work was supported by grants from the Danish Council for Independent Research, The Niels Bohr Foundation and The Carlsberg Foundation to T.K., and by grants from the US National Science Foundation to H.J. (NSF OCE-1129496 and IOS-0718506). en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1098/rsif.2012.0693
dc.subject Zooplankton fluid dynamics en_US
dc.subject Mortality risk en_US
dc.subject Optimal foraging en_US
dc.subject Copepod en_US
dc.subject Centropages typicus en_US
dc.subject Temora longicornis en_US
dc.title To eat and not be eaten : optimal foraging behaviour in suspension feeding copepods en_US
dc.type Preprint en_US

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