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JOURNAL OF PLANKTON RESEARCH | VOLUME 10 | NUMBER 3 | PAGES 455-464 | 1988
© Oxford University Press

research-article

How advantageous is a sensory prey detection mechanism to predatory microflagellates?

M.J. Sibbald, P.R. Sibbald1 and L.J. Albright

1Department of Botany, University of British Columbia Vancouver, BC, Canada Biological Sciences, Simon Fraser University Burnaby, BC, Canada

Received on June 9, 1987; accepted on February 8, 1988 The advantage conferred on a microflagellate predator by possession of a sensory prey detection mechanism has been estimated using a model. The calculations demonstrate that a sensory mechanism is important and sometimes essential for microflagellate survival in environments where prey are scarce. Even where prey are relatively abundant such a mechanism still confers an advantage on a microflagellate. It allows more energy to be diverted to growth and reproduction. It may also play a role in prey discrimination. Due to the advantage conferred, sensory mechanisms are probably widespread among microflagellates. This model can be generally applied to small aquatic predators to determine whether a sensory mechanism is likely to be present.


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