Document Detail


Disruptive coloration provides camouflage independent of background matching.
MedLine Citation:
PMID:  16959631     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Natural selection shapes the evolution of anti-predator defences, such as camouflage. It is currently contentious whether crypsis and disruptive coloration are alternative mechanisms of camouflage or whether they are interrelated anti-predator defences. Disruptively coloured prey is characterized by highly contrasting patterns to conceal the body shape, whereas cryptic prey minimizes the contrasts to background. Determining bird predation of artificial moths, we found that moths which were dissimilar from the background but sported disruptive patterns on the edge of their wings survived better in heterogeneous habitats than did moths with the same patterns inside of the wings and better than cryptic moths. Despite lower contrasts to background, crypsis did not provide fitness benefits over disruptive coloration on the body outline. We conclude that disruptive coloration on the edge camouflages its bearer independent of background matching. We suggest that this result is explainable because disruptive coloration is effective by exploiting predators' cognitive mechanisms of prey recognition and not their sensory mechanisms of signal detection. Relative to disruptive patterns on the body outline, disruptive markings on the body interior are less effective. Camouflage owing to disruptive coloration on the body interior is background-specific and is as effective as crypsis in heterogeneous habitats. Hence, we hypothesize that two proximate mechanisms explain the diversity of visual anti-predator defences. First, disruptive coloration on the body outline provides camouflage independent of the background. Second, background matching and disruptive coloration on the body interior provide camouflage, but their protection is background-specific.
Authors:
H Martin Schaefer; Nina Stobbe
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  273     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-08     Completed Date:  2007-01-16     Revised Date:  2013-06-07    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2427-32     Citation Subset:  IM    
Affiliation:
Institute of Biology 1, University of Freiburg, Hauptstrasse 1, 79104 Freiburg, Germany. martin.schaefer@biologie.uni-freiburg.de
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MeSH Terms
Descriptor/Qualifier:
Animals
Birds
Color
Environment
Moths*
Pigmentation*
Predatory Behavior
Selection, Genetic
Visual Perception
Comments/Corrections
Comment In:
Proc Biol Sci. 2006 Oct 7;273(1600):2425-6   [PMID:  16959630 ]

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