The effect of predator appetite, prey warning coloration and luminance on predator foraging decisions Siiri-Lii Sandre 1,4) , Martin Stevens 2) & Johanna Mappes 3) ( 1 Institute of Ecology and Earth Sciences, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; 2 Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK; 3 Department of Biological and Environmental Science, Centre of Excellence in Evolutionary Research, University of Jyväskylä, Survontie 9, 40100 Jyväskylä, Finland) (Accepted: 26 April 2010) Summary Aposematic prey advertise their defence to visually hunting predators using conspicuous warning colouration. Established theory predicts that aposematic signals should evolve to- wards increased conspicuousness and similarity to enhance predator education. Contrary to theoretical expectations, there is often considerable within- and between-species variation in aposematic signals of animals sharing the same ecological niche, phylogeny and predators. This may be explained by varying responses of predators that weaken the selection pressure for a consistent signal. By presenting painted mealworm larvae as prey to great tits as preda- tors we tested if different aposematic colour patterns have different values as a means of initial protection and learnt avoidance from predators, and how widely birds generalise their learnt avoidance to other
Behaviour – Brill
Published: Jan 1, 2010
Keywords: COLOUR; LUMINANCE; WARNING SIGNALS; AVIAN VISION; GENERALIZATION
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