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Colour polymorphic lures exploit innate preferences for spectral versus luminance cues in dipteran prey.

Thomas E WhiteDarrell J Kemp
Published in: BMC evolutionary biology (2017)
While not fully consistent with predictions (given the absence of a differential preference for stimuli at close range), our results demonstrate an effect of apparent stimulus size upon relative morph attractiveness in the direction anticipated from present knowledge of fly visual ecology. This implies the potential tuning of G. fornicata morph signal structure according to a perceptual feature that is likely common across their breadth of arthropod prey, and complements recent observational work in suggesting a candidate mechanism for the maintenance of deceptive polymorphism through the exploitation of different visual channels in prey.
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