Linking the evolution and form of warning coloration in nature

Many animals are toxic or unpalatable and signal this to predators with warning signals (aposematism). Aposematic appearance has long been a classical system to study predator–prey interactions, communication and signalling, and animal behaviour and learning. The area has received considerable empir...

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Bibliographic Details
Published in:Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2012-02, Vol.279 (1728), p.417-426
Main Authors: Stevens, Martin, Ruxton, Graeme D
Format: Article
Language:English
Subjects:
animal behavior
Animal Communication
Animal morphology
Animals
Aposematism
Avoidance Learning
Biological Evolution
Color
Colors
Defensive Coloration
Ecosystem
Evolution
Food Chain
Frogs
Genetic Speciation
Genetic Variation
Larvae
learning
mating behavior
Mating Preference, Animal
Mimicry
Poisons
Predation
Predators
Predatory Behavior
psychology
Review
Review Articles
Signal
toxicity
Vision
Visual Perception
Warning systems
Warnings
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Summary:Many animals are toxic or unpalatable and signal this to predators with warning signals (aposematism). Aposematic appearance has long been a classical system to study predator–prey interactions, communication and signalling, and animal behaviour and learning. The area has received considerable empirical and theoretical investigation. However, most research has centred on understanding the initial evolution of aposematism, despite the fact that these studies often tell us little about the form and diversity of real warning signals in nature. In contrast, less attention has been given to the mechanistic basis of aposematic markings; that is, ‘what makes an effective warning signal?’, and the efficacy of warning signals has been neglected. Furthermore, unlike other areas of adaptive coloration research (such as camouflage and mate choice), studies of warning coloration have often been slow to address predator vision and psychology. Here, we review the current understanding of warning signal form, with an aim to comprehend the diversity of warning signals in nature. We present hypotheses and suggestions for future work regarding our current understanding of several inter-related questions covering the form of warning signals and their relationship with predator vision, learning, and links to broader issues in evolutionary ecology such as mate choice and speciation.
ISSN:0962-8452
1471-2954
1471-2945
DOI:10.1098/rspb.2011.1932