Document Detail

A performance-based cost to honest signalling in male green anole lizards (Anolis carolinensis).
MedLine Citation:
PMID:  22418258     Owner:  NLM     Status:  MEDLINE    
Sexual signals are considered costly to produce and maintain under the handicap paradigm, and the reliability of signals is in turn thought to be maintained by these costs. Although previous studies have investigated the costly nature of signal production, few have considered whether honesty might be maintained not by the costliness of the signal itself, but by the costs involved in producing the signalled trait. If such a trait is itself costly to produce, then the burden of energetic investment may fall disproportionately on that trait, in addition to any costs of signal maintenance that may also be operating. Under limited resource conditions, these costs may therefore be great enough to disrupt an otherwise reliable signal-to-trait relationship. We present experimental evidence showing that dietary restriction decouples the otherwise honest relationship between a signal (dewlap size) and a whole-organism performance trait (bite force) in young adult male Anolis carolinensis lizards. Specifically, while investment in dewlap size is sustained under low-resource condition relative to the high-resource treatment, investment in bite force is substantially lower. Disruption of the otherwise honest dewlap size to bite force relationship is therefore driven by costs associated with the expression of performance rather than the costs of signal production in A. carolinensis.
Simon P Lailvaux; Rebecca L Gilbert; Jessica R Edwards
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Publication Detail:
Type:  Journal Article     Date:  2012-03-14
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  279     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-06-12     Completed Date:  2012-10-17     Revised Date:  2013-07-24    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2841-8     Citation Subset:  IM    
Department of Biological Sciences, The University of New Orleans, New Orleans, LA 70148, USA.
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MeSH Terms
Animal Communication*
Animal Feed
Bites and Stings
Diet / veterinary
Energy Metabolism / physiology*
Lizards / anatomy & histology*,  physiology*
Sex Characteristics
Time Factors

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