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© 1997 International Society for Behavioral Ecology

research-article

Saltatory search: a theoretical analysis

J. P. Andersona, D. W. Stephensa and S. R. Dunbarb

aNebraska Behavioral Biology Group, School of Biological Sciences, University of Nebraska-Lincoln Lincoln, NE 68588-0118, USA bDepartment of Mathematics and Statistics, University of Nebraska-Lincoln Lincoln, NE 68588-0118, USA

ABSTRACT

Many animal search in a saltatory fashion: they move forward, pause briefly, and move forward again. Although many optimal-foraging models have been developed, most do not address how an animal searches for food. We view search strategies as "time-distance" functions to allow not only for the possibility of oscillations in body speed, as implied by saltatory search, but other movement patterns as well, including cruise search. The key feature of our models is distinguishing between the body position and the scan position (where the forager is looking). We see the varying movement of saltatory search as a consequence of the curvature in the functions that relate body speed to benefits (Jensen's inequality)

Key words: blue jay, crypticity, foraging, optimality models, saltatory search.


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