Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts

Honeybees Apis mellifera were trained to distinguish between the presence and the absence of a rewarded coloured spot, presented on a vertical, achromatic plane in a Y-maze. They were subsequently tested with different subtended visual angles of that spot, generated by different disk diameters and d...

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Autores principales:	Giurfa, M., Vorobyev, M., Kevan, P., Menzel, R.
Formato:	JOUR
Materias:	Apis mellifera Colour vision Detection Honeybees
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03407594_v178_n5_p699_Giurfa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03407594_v178_n5_p699_Giurfa
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spelling	todo:paper_03407594_v178_n5_p699_Giurfa2023-10-03T15:25:54Z Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts Giurfa, M. Vorobyev, M. Kevan, P. Menzel, R. Apis mellifera Colour vision Detection Honeybees Honeybees Apis mellifera were trained to distinguish between the presence and the absence of a rewarded coloured spot, presented on a vertical, achromatic plane in a Y-maze. They were subsequently tested with different subtended visual angles of that spot, generated by different disk diameters and different distances from the decision point in the device. Bees were trained easily to detect bee-chromatic colours, but not an achromatic one. Chromatic contrast was not the only parameter allowing learning and, therefore, detection: αmin, the subtended visual angle at which the bees detect a given stimulus with a probability P0 = 0.6, was 5° for stimuli presenting both chromatic contrast and contrast for the green photoreceptors [i.e. excitation difference in the green photoreceptors, between target and background (green contrast)], and 15° for stimuli presenting chromatic but no green contrast. Our results suggest that green contrast can be utilized for target detection if target recognition has been established by means of the colour vision system. The green-contrast signal would be used as a far-distance signal for flower detection. This signal would always be detected before chromatic contrast during an approach flight and would be learned in compound with chromatic contrast, in a facilitation-like process. Fil:Giurfa, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03407594_v178_n5_p699_Giurfa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Apis mellifera Colour vision Detection Honeybees
spellingShingle	Apis mellifera Colour vision Detection Honeybees Giurfa, M. Vorobyev, M. Kevan, P. Menzel, R. Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
topic_facet	Apis mellifera Colour vision Detection Honeybees
description	Honeybees Apis mellifera were trained to distinguish between the presence and the absence of a rewarded coloured spot, presented on a vertical, achromatic plane in a Y-maze. They were subsequently tested with different subtended visual angles of that spot, generated by different disk diameters and different distances from the decision point in the device. Bees were trained easily to detect bee-chromatic colours, but not an achromatic one. Chromatic contrast was not the only parameter allowing learning and, therefore, detection: αmin, the subtended visual angle at which the bees detect a given stimulus with a probability P0 = 0.6, was 5° for stimuli presenting both chromatic contrast and contrast for the green photoreceptors [i.e. excitation difference in the green photoreceptors, between target and background (green contrast)], and 15° for stimuli presenting chromatic but no green contrast. Our results suggest that green contrast can be utilized for target detection if target recognition has been established by means of the colour vision system. The green-contrast signal would be used as a far-distance signal for flower detection. This signal would always be detected before chromatic contrast during an approach flight and would be learned in compound with chromatic contrast, in a facilitation-like process.
format	JOUR
author	Giurfa, M. Vorobyev, M. Kevan, P. Menzel, R.
author_facet	Giurfa, M. Vorobyev, M. Kevan, P. Menzel, R.
author_sort	Giurfa, M.
title	Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
title_short	Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
title_full	Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
title_fullStr	Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
title_full_unstemmed	Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts
title_sort	detection of coloured stimuli by honeybees: minimum visual angles and receptor specific contrasts
url	http://hdl.handle.net/20.500.12110/paper_03407594_v178_n5_p699_Giurfa
work_keys_str_mv	AT giurfam detectionofcolouredstimulibyhoneybeesminimumvisualanglesandreceptorspecificcontrasts AT vorobyevm detectionofcolouredstimulibyhoneybeesminimumvisualanglesandreceptorspecificcontrasts AT kevanp detectionofcolouredstimulibyhoneybeesminimumvisualanglesandreceptorspecificcontrasts AT menzelr detectionofcolouredstimulibyhoneybeesminimumvisualanglesandreceptorspecificcontrasts
_version_	1807322288618471424

Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts

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