Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials

SUMMARY: The retina of vertebrates shows adaptations to the visual environment in which they evolve. Thus, there exists a relationship between the topographic distribution of retinal cells, the adaptive strategies employed, and habitat, so that, analyses of retinal ganglion cell topography provide i...

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Autores principales:	Navarro-Sempere,A, Segovia,Y, García,M
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2018
Materias:	Marsupial retina Visual ecology Ganglion cell topography
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000100248
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spelling	oai:scielo:S0717-950220180001002482019-09-16Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian MarsupialsNavarro-Sempere,ASegovia,YGarcía,M Marsupial retina Visual ecology Ganglion cell topography SUMMARY: The retina of vertebrates shows adaptations to the visual environment in which they evolve. Thus, there exists a relationship between the topographic distribution of retinal cells, the adaptive strategies employed, and habitat, so that, analyses of retinal ganglion cell topography provide information about the behavioral ecology of a species. Although these relationships are well documented in many vertebrates, including mammals, for species within the marsupial order, they are not well understood. However, marsupials represent an ideal group for comparative analyses of interspecific variations in the mammalian visual system because they contain species that vary in both lifestyle and habitat preference. In this paper the interspecific variation in retinal ganglion cell topography in 13 species of Australian marsupials is reviewed. The species that live in open habitats have well-defined elongated visual streaks. In contrast, forest-dwelling marsupials have poorly defined visual streaks and a more radially symmetrical arrangement of retinal ganglion cell (RGC) isodensity contours. However, the organization and degree of elongation of the visual streak varies considerably among species. The results indicate that the apparent interspecific variation is associated with activity pattern and habitat as opposed to the phylogenetic relationships among species.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.36 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000100248en10.4067/S0717-95022018000100248
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Marsupial retina Visual ecology Ganglion cell topography
spellingShingle	Marsupial retina Visual ecology Ganglion cell topography Navarro-Sempere,A Segovia,Y García,M Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
description	SUMMARY: The retina of vertebrates shows adaptations to the visual environment in which they evolve. Thus, there exists a relationship between the topographic distribution of retinal cells, the adaptive strategies employed, and habitat, so that, analyses of retinal ganglion cell topography provide information about the behavioral ecology of a species. Although these relationships are well documented in many vertebrates, including mammals, for species within the marsupial order, they are not well understood. However, marsupials represent an ideal group for comparative analyses of interspecific variations in the mammalian visual system because they contain species that vary in both lifestyle and habitat preference. In this paper the interspecific variation in retinal ganglion cell topography in 13 species of Australian marsupials is reviewed. The species that live in open habitats have well-defined elongated visual streaks. In contrast, forest-dwelling marsupials have poorly defined visual streaks and a more radially symmetrical arrangement of retinal ganglion cell (RGC) isodensity contours. However, the organization and degree of elongation of the visual streak varies considerably among species. The results indicate that the apparent interspecific variation is associated with activity pattern and habitat as opposed to the phylogenetic relationships among species.
author	Navarro-Sempere,A Segovia,Y García,M
author_facet	Navarro-Sempere,A Segovia,Y García,M
author_sort	Navarro-Sempere,A
title	Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
title_short	Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
title_full	Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
title_fullStr	Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
title_full_unstemmed	Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials
title_sort	comparative analysis of retinal ganglion cell topography and behavioral ecology in australian marsupials
publisher	Sociedad Chilena de Anatomía
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000100248
work_keys_str_mv	AT navarrosemperea comparativeanalysisofretinalganglioncelltopographyandbehavioralecologyinaustralianmarsupials AT segoviay comparativeanalysisofretinalganglioncelltopographyandbehavioralecologyinaustralianmarsupials AT garciam comparativeanalysisofretinalganglioncelltopographyandbehavioralecologyinaustralianmarsupials
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Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials

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