Visual discrimination of cues differing as for their number of elements, their shape or their orientation, by the ant Myrmica sabuleti |
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Authors: | Marie-Claire Cammaerts |
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Institution: | (1) Faculté des Sciences, CP 160/11, Université Libre de Bruxelles, 50 Av. F. Roosevelt, 1050 Bruxelles, Belgique |
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Abstract: | Using operant conditioning as a method, we study if Myrmica sabuleti workers can discriminate figures made of different numbers of the same element, different filled shapes or hollow forms and
elements differently oriented. The ants effectively discriminate figures containing different numbers of the same element
but without counting the elements: their distinguishing is based on the global aspect (dimensions, area) of the figures. They
distinguish filled shapes as well as hollow forms when these look different if seen with convexity. For instance, they differentiate
well between concave filled shapes or concave hollow forms. They see distinctly an element and the same one rotated if this
element, seen with convexity, looks different after its rotation. They perceive until a 30° rotation of a vertical segment
and until a 15° rotation of a horizontal segment. In conclusion, M. sabuleti workers are sensitive to the number of elements, dimension, shape, form and orientation of visual cues with the restriction
that they probably see them with convexity. |
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Keywords: | ant conditioning cues discrimination Myrmica sabuleti vision |
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