Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors

SUMMARY: Retinal Ganglion Cells (RGCs) in two diurnal raptors, the buzzard (Buteo buteo) and kestrel (Falco tinnunculus), and in two nocturnal raptors, the little owl (Athene noctua) and tawny owl (Strix aluco), were studied in order to highlight their topographical distribution, taking into account...

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Autores principales:	Coli,Alessandra, Stornelli,Maria Rita, Barsotti,Giovanni, Lenzi,Carla, Bogi,Francesca, Giannessi,Elisabetta
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2018
Materias:	Retinal ganglion cells Topographical distribution Raptors
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300955
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spelling	oai:scielo:S0717-950220180003009552019-09-16Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal RaptorsColi,AlessandraStornelli,Maria RitaBarsotti,GiovanniLenzi,CarlaBogi,FrancescaGiannessi,Elisabetta Retinal ganglion cells Topographical distribution Raptors SUMMARY: Retinal Ganglion Cells (RGCs) in two diurnal raptors, the buzzard (Buteo buteo) and kestrel (Falco tinnunculus), and in two nocturnal raptors, the little owl (Athene noctua) and tawny owl (Strix aluco), were studied in order to highlight their topographical distribution, taking into account the soma size. Cell density (RGCs/mm2) and median soma area from histological radial sections in four retinal fields (dorsal, ventral, temporal and nasal) were recorded in order to identify specialized retinal vision areas. The results showed a different RGCs distribution between diurnal and nocturnal raptors related to the location of the foveas and shape of the horizontal streak, confirming the bibliographic data. In diurnal raptors, a higher cell density was found in the temporal and central retinal fields as revealed by the presence of a temporal and a central fovea which showed a “horizontal streak”. In nocturnal raptors the cell density was higher in the peripheral temporal field likely due to a temporal fovea. A peak in cell density observed in the ventral field, especially in the retina of little owls, might be linked to a more “radial visual streak”. Comparing the data obtained we highlighted that the morphology and the number of RGCs are closely linked to the habitat and to the type of predation.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.36 n.3 20182018-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300955en10.4067/S0717-95022018000300955
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Retinal ganglion cells Topographical distribution Raptors
spellingShingle	Retinal ganglion cells Topographical distribution Raptors Coli,Alessandra Stornelli,Maria Rita Barsotti,Giovanni Lenzi,Carla Bogi,Francesca Giannessi,Elisabetta Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
description	SUMMARY: Retinal Ganglion Cells (RGCs) in two diurnal raptors, the buzzard (Buteo buteo) and kestrel (Falco tinnunculus), and in two nocturnal raptors, the little owl (Athene noctua) and tawny owl (Strix aluco), were studied in order to highlight their topographical distribution, taking into account the soma size. Cell density (RGCs/mm2) and median soma area from histological radial sections in four retinal fields (dorsal, ventral, temporal and nasal) were recorded in order to identify specialized retinal vision areas. The results showed a different RGCs distribution between diurnal and nocturnal raptors related to the location of the foveas and shape of the horizontal streak, confirming the bibliographic data. In diurnal raptors, a higher cell density was found in the temporal and central retinal fields as revealed by the presence of a temporal and a central fovea which showed a “horizontal streak”. In nocturnal raptors the cell density was higher in the peripheral temporal field likely due to a temporal fovea. A peak in cell density observed in the ventral field, especially in the retina of little owls, might be linked to a more “radial visual streak”. Comparing the data obtained we highlighted that the morphology and the number of RGCs are closely linked to the habitat and to the type of predation.
author	Coli,Alessandra Stornelli,Maria Rita Barsotti,Giovanni Lenzi,Carla Bogi,Francesca Giannessi,Elisabetta
author_facet	Coli,Alessandra Stornelli,Maria Rita Barsotti,Giovanni Lenzi,Carla Bogi,Francesca Giannessi,Elisabetta
author_sort	Coli,Alessandra
title	Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
title_short	Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
title_full	Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
title_fullStr	Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
title_full_unstemmed	Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors
title_sort	number and topographical distribution of retinal ganglion cells in diurnal and nocturnal raptors
publisher	Sociedad Chilena de Anatomía
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000300955
work_keys_str_mv	AT colialessandra numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors AT stornellimariarita numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors AT barsottigiovanni numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors AT lenzicarla numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors AT bogifrancesca numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors AT giannessielisabetta numberandtopographicaldistributionofretinalganglioncellsindiurnalandnocturnalraptors
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Number and Topographical Distribution of Retinal Ganglion Cells in Diurnal and Nocturnal Raptors

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