Nov 1, 2016

Social costs enforce honesty of a dynamic signal of motivation

Proceedings. Biological Sciences
Russell A Ligon, Kevin J McGraw

Abstract

Understanding the processes that promote signal reliability may provide important insights into the evolution of diverse signalling strategies among species. The signals that animals use to communicate must comprise mechanisms that prohibit or punish dishonesty, and social costs of dishonesty have been demonstrated for several fixed morphological signals (e.g. colour badges of birds and wasps). The costs maintaining the honesty of dynamic signals, which are more flexible and potentially cheatable, are unknown. Using an experimental manipulation of the dynamic visual signals used by male veiled chameleons (Chamaeleo calyptratus) during aggressive interactions, we tested the idea that the honesty of rapid colour change signals is maintained by social costs. Our results reveal that social costs are an important mechanism maintaining the honesty of these dynamic colour signals-'dishonest' chameleons whose experimentally manipulated coloration was incongruent with their contest behaviour received more physical aggression than 'honest' individuals. This is the first demonstration, to the best our knowledge, that the honesty of a dynamic signal of motivation-physiological colour change-can be maintained by the social costliness of dis...Continue Reading

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  • Citations3

References

Mentioned in this Paper

Behavior, Animal
Strategy
Cues
Chamaeleo calyptratus
Lizards
Prohibit
Aves
Genus Chamaeleo (organism)
Species
Chameleon beta protein, synthetic

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