How Far Stationary Contrast Boundaries Can Be Away to Elicit Behavioral Responses in Praying Mantis
2012
Kral, Karl
The aim of the present study was to investigate the distance at which vertical black and white stripes (contrast boundaries) elicit object-related behavioral responses in 6th instar and adults of the praying mantis Mantis religiosa. The mantids reacted when the contrast boundaries were not further away than 60Â cm. However, with increasing distance (>20Â cm), the contrast boundaries became progressively less significant for the mantids. Jumps/preparation of jumps could be observed between 10 and 30Â cm. The results are supportive for distance measurement of up to 20–30Â cm, which corresponds to distance accessible for the insect. It seems that image motion cues induced by peering movements play an important role.
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