Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters

Crabs have panoramic compound eyes, which can show marked regional specializations of visual acuity. These specializations are thought to be related to the particular features of the animal's ecological environment. Modern knowledge on the neuroanatomy and neurophysiology of the crabs' vis...

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Autores principales: Berón de Astrada, M., Bengochea, M., Medan, V., Tomsic, D.
Formato: JOUR
Materias:
Behaviour
Brachyura
Compound eye
Visual system
Visuotopy
animal
animal behavior
article
compound eye
histology
male
physiology
vision
visual field
Animals
Behavior, Animal
Compound Eye, Arthropod
Male
Vision, Ocular
Visual Fields
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03407594_v198_n3_p173_BerondeAstrada
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03407594_v198_n3_p173_BerondeAstrada
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spelling todo:paper_03407594_v198_n3_p173_BerondeAstrada2023-10-03T15:26:08Z Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters Berón de Astrada, M. Bengochea, M. Medan, V. Tomsic, D. Behaviour Brachyura Compound eye Visual system Visuotopy animal animal behavior article Brachyura compound eye histology male physiology vision visual field Animals Behavior, Animal Brachyura Compound Eye, Arthropod Male Vision, Ocular Visual Fields Crabs have panoramic compound eyes, which can show marked regional specializations of visual acuity. These specializations are thought to be related to the particular features of the animal's ecological environment. Modern knowledge on the neuroanatomy and neurophysiology of the crabs' visual system mainly derives from studies performed in the grapsid crab Neohelice granulata (=Chasmagnathus granulatus). However, the organization of the visual sampling elements across the eye surface of this animal had not yet been addressed. We analyzed the sampling resolution across the eye of Neohelice by measuring the pseudopupil displacement with a goniometer. In addition, we measured the facet sizes in the different regions of the eye. We found that Neohelice possesses an acute band of high vertical resolution around the eye equator and an increase in horizontal sampling resolution and lenses diameter towards the lateral side of the eye. Therefore, the analysis of the optical apparatus indicates that this crab possesses greater visual acuity around the equator and at the lateral side of the eye. These specializations are compared with those found in different species of crabs and are discussed in connection to the particular ecological features of Neohelice's habitat. © 2011 Springer-Verlag. Fil:Berón de Astrada, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Medan, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tomsic, D. 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_v198_n3_p173_BerondeAstrada
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Behaviour
Brachyura
Compound eye
Visual system
Visuotopy
animal
animal behavior
article
Brachyura
compound eye
histology
male
physiology
vision
visual field
Animals
Behavior, Animal
Brachyura
Compound Eye, Arthropod
Male
Vision, Ocular
Visual Fields
spellingShingle Behaviour
Brachyura
Compound eye
Visual system
Visuotopy
animal
animal behavior
article
Brachyura
compound eye
histology
male
physiology
vision
visual field
Animals
Behavior, Animal
Brachyura
Compound Eye, Arthropod
Male
Vision, Ocular
Visual Fields
Berón de Astrada, M.
Bengochea, M.
Medan, V.
Tomsic, D.
Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
topic_facet Behaviour
Brachyura
Compound eye
Visual system
Visuotopy
animal
animal behavior
article
Brachyura
compound eye
histology
male
physiology
vision
visual field
Animals
Behavior, Animal
Brachyura
Compound Eye, Arthropod
Male
Vision, Ocular
Visual Fields
description Crabs have panoramic compound eyes, which can show marked regional specializations of visual acuity. These specializations are thought to be related to the particular features of the animal's ecological environment. Modern knowledge on the neuroanatomy and neurophysiology of the crabs' visual system mainly derives from studies performed in the grapsid crab Neohelice granulata (=Chasmagnathus granulatus). However, the organization of the visual sampling elements across the eye surface of this animal had not yet been addressed. We analyzed the sampling resolution across the eye of Neohelice by measuring the pseudopupil displacement with a goniometer. In addition, we measured the facet sizes in the different regions of the eye. We found that Neohelice possesses an acute band of high vertical resolution around the eye equator and an increase in horizontal sampling resolution and lenses diameter towards the lateral side of the eye. Therefore, the analysis of the optical apparatus indicates that this crab possesses greater visual acuity around the equator and at the lateral side of the eye. These specializations are compared with those found in different species of crabs and are discussed in connection to the particular ecological features of Neohelice's habitat. © 2011 Springer-Verlag.
format JOUR
author Berón de Astrada, M.
Bengochea, M.
Medan, V.
Tomsic, D.
author_facet Berón de Astrada, M.
Bengochea, M.
Medan, V.
Tomsic, D.
author_sort Berón de Astrada, M.
title Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
title_short Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
title_full Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
title_fullStr Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
title_full_unstemmed Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): Variation of resolution and facet diameters
title_sort regionalization in the eye of the grapsid crab neohelice granulata (=chasmagnathus granulatus): variation of resolution and facet diameters
url http://hdl.handle.net/20.500.12110/paper_03407594_v198_n3_p173_BerondeAstrada
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