Predator mixes and the conspicuousness of aposematic signals
journal contributionposted on 2004-04-01, 00:00 authored by John EndlerJohn Endler, J Mappes
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.
Pagination532 - 547
PublisherUniversity of Chicago Press
NotesReproduced with the specific permission of the copyright owner.
Publication classificationC1.1 Refereed article in a scholarly journal
Copyright notice2004, The University of Chicago
CategoriesNo categories selected
frequency-dependent selectioncrypsispredationaposematismapostatic selectionScience & TechnologyLife Sciences & BiomedicineEcologyEvolutionary BiologyEnvironmental Sciences & EcologyAVIAN FEEDING-BEHAVIORCORAL-SNAKE PATTERNDIETARY CONSERVATISMRECEIVER PSYCHOLOGYCRYPTIC COLORATIONWARNING COLORATIONRECOGNITION ERRORSDANAUS-PLEXIPPUS