PMID: 11607067Mar 1, 1990Paper

Grazing in a turbulent environment: energy dissipation, encounter rates, and efficacy of feeding currents in Centropages hamatus

Proceedings of the National Academy of Sciences of the United States of America
C MarraséJ Rudi Strickler

Abstract

The creation of feeding currents by calanoid copepods increases encounter rates of copepods with their food and provides and advantage in dilute nutritional environments. Small-scale turbulence has also been hypothesized to increase the encounter rate between planktonic predators and their food. Centropages hamatus was exposed to turbulent and nonturbulent environments at two prey concentrations to quantify the influence of turbulence on feeding current efficacy. Turbulent energy dissipation rates used in the experiment were in the range of 0.05-0.15 cm2. sec-3. In the nonturbulent environments, feeding currents increased the encounter rates of C. hamatus 3-5 times that of control encounter areas. In turbulent environments, encounter rates were not increased by feeding currents, yet C. hamatus continued to create feeding currents. Energetic calculations indicate a tradeoff in the value of turbulence to a copepod feeding on phytoplankton. While turbulence is probably beneficial at low food concentrations, it may be deleterious at high food concentrations.

References

Mar 1, 1990·Proceedings of the National Academy of Sciences of the United States of America·J H CostelloA J Freise

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Citations

Mar 1, 1990·Proceedings of the National Academy of Sciences of the United States of America·J H CostelloA J Freise
Mar 23, 2012·Proceedings. Biological Sciences·Brad J GemmellEdward J Buskey
Jul 5, 2012·PloS One·David M FieldsAnne Berit Skiftesvik
Oct 6, 2017·The Journal of Experimental Biology·Heidi L FuchsAdam J Christman
May 10, 2003·Proceedings. Biological Sciences·R ReigadaF Sagués
May 7, 2019·Microsystems & Nanoengineering·Srinivas HanasogeAlexander Alexeev
Jan 15, 2021·The Journal of Experimental Biology·Dorsa ElmiDavid M Fields
Dec 13, 2002·The Journal of Experimental Biology·Luca A van DurenJohn J Videler

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