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Predator mixes and the conspicuousness of aposematic signals

Endler, John A. and Mappes, Johanna 2004, Predator mixes and the conspicuousness of aposematic signals, American naturalist, vol. 163, no. 4, pp. 532-547.

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Title Predator mixes and the conspicuousness of aposematic signals
Author(s) Endler, John A.
Mappes, Johanna
Journal name American naturalist
Volume number 163
Issue number 4
Start page 532
End page 547
Publisher University of Chicago Press
Place of publication Chicago, Ill.
Publication date 2004-04
ISSN 0003-0147
1537-5323
Keyword(s) frequency-dependent selection
crypsis
predation
aposematism
apostatic selection
Summary Conspicuous warning signals of unprofitable prey are a defense against visually hunting predators. They work because predators learn to associate unprofitability with bright coloration and because strong signals are detectable and memorable. However, many species that can be considered defended are not very conspicuous; they have weak warning signals. This phenomenon has previously been ignored in models and experiments. In addition, there is significant within- and among-species variation among predators in their search behavior, in their visual, cognitive, and learning abilities, and in their resistance to defenses. In this article we explore the effects of variable predators on models that combine positive frequency-dependent, frequency-independent, and negative frequency-dependent predation and show that weak signaling of aposematic species can evolve if predators vary in their tendency to attack defended prey.
Notes Reproduced with the specific permission of the copyright owner.
Language eng
Field of Research 059999 Environmental Sciences not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2004, The University of Chicago
Persistent URL http://hdl.handle.net/10536/DRO/DU:30023049

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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