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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Guardado en:
Detalles Bibliográficos
Autor principal: Giurfa, Martín
Publicado: 1996
Materias:
Apis mellifera
Colour vision
Detection
Honeybees
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n5_p699_Giurfa
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 paper:paper_03407594_v178_n5_p699_Giurfa
record_format dspace
spelling paper:paper_03407594_v178_n5_p699_Giurfa2023-06-08T15:34:13Z Detection of coloured stimuli by honeybees: Minimum visual angles and receptor specific contrasts Giurfa, Martín 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. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n5_p699_Giurfa 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, Martín
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.
author Giurfa, Martín
author_facet Giurfa, Martín
author_sort Giurfa, Martín
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
publishDate 1996
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n5_p699_Giurfa
http://hdl.handle.net/20.500.12110/paper_03407594_v178_n5_p699_Giurfa
work_keys_str_mv AT giurfamartin detectionofcolouredstimulibyhoneybeesminimumvisualanglesandreceptorspecificcontrasts
_version_ 1768545510183927808

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