Specialized photoreceptor composition in the raptor fovea
The retinae of many bird species contain a depression with high photoreceptor density known as the fovea. Many species of raptors have two foveae, a deep central fovea and a shallower temporal fovea. Birds have six types of photoreceptors: rods, active in dim light, double cones that are thought to...
Published in: | Journal of Comparative Neurology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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John Wiley & Sons Inc.
2017
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Online Access: | https://lup.lub.lu.se/record/e2e39a04-c0b8-4eed-affb-e917a0ece840 https://doi.org/10.1002/cne.24190 |
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ftulundlup:oai:lup.lub.lu.se:e2e39a04-c0b8-4eed-affb-e917a0ece840 2024-04-28T08:18:17+00:00 Specialized photoreceptor composition in the raptor fovea Mitkus, Mindaugas Olsson, Peter Toomey, Matthew B Corbo, Joseph C Kelber, Almut 2017-06-15 https://lup.lub.lu.se/record/e2e39a04-c0b8-4eed-affb-e917a0ece840 https://doi.org/10.1002/cne.24190 eng eng John Wiley & Sons Inc. https://lup.lub.lu.se/record/e2e39a04-c0b8-4eed-affb-e917a0ece840 http://dx.doi.org/10.1002/cne.24190 scopus:85014879985 pmid:28199005 wos:000400585200007 Journal of Comparative Neurology; 525(9), pp 2152-2163 (2017) ISSN: 0021-9967 Zoology Birds of prey Double cones Retina Rods RRID: AB_2156055 RRID: AB_2158332 RRID: AB_2315274 RRID: AB_2534069 RRID: AB_2534102 Visual ecology contributiontojournal/article info:eu-repo/semantics/article text 2017 ftulundlup https://doi.org/10.1002/cne.24190 2024-04-03T14:02:17Z The retinae of many bird species contain a depression with high photoreceptor density known as the fovea. Many species of raptors have two foveae, a deep central fovea and a shallower temporal fovea. Birds have six types of photoreceptors: rods, active in dim light, double cones that are thought to mediate achromatic discrimination, and four types of single cones mediating color vision. To maximize visual acuity, the fovea should only contain photoreceptors contributing to high-resolution vision. Interestingly, it has been suggested that raptors might lack double cones in the fovea. We used transmission electron microscopy and immunohistochemistry to evaluate this claim in five raptor species: the common buzzard (Buteo buteo), the honey buzzard (Pernis apivorus), the Eurasian sparrowhawk (Accipiter nisus), the red kite (Milvus milvus), and the peregrine falcon (Falco peregrinus). We found that all species, except the Eurasian sparrowhawk, lack double cones in the center of the central fovea. The size of the double cone-free zone differed between species. Only the common buzzard had a double cone-free zone in the temporal fovea. In three species, we examined opsin expression in the central fovea and found evidence that rod opsin positive cells were absent and violet-sensitive cone and green-sensitive cone opsin positive cells were present. We conclude that not only double cones, but also single cones may contribute to high-resolution vision in birds, and that raptors may in fact possess high-resolution tetrachromatic vision in the central fovea. Article in Journal/Newspaper Falco peregrinus peregrine falcon Lund University Publications (LUP) Journal of Comparative Neurology 525 9 2152 2163 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Zoology Birds of prey Double cones Retina Rods RRID: AB_2156055 RRID: AB_2158332 RRID: AB_2315274 RRID: AB_2534069 RRID: AB_2534102 Visual ecology |
spellingShingle |
Zoology Birds of prey Double cones Retina Rods RRID: AB_2156055 RRID: AB_2158332 RRID: AB_2315274 RRID: AB_2534069 RRID: AB_2534102 Visual ecology Mitkus, Mindaugas Olsson, Peter Toomey, Matthew B Corbo, Joseph C Kelber, Almut Specialized photoreceptor composition in the raptor fovea |
topic_facet |
Zoology Birds of prey Double cones Retina Rods RRID: AB_2156055 RRID: AB_2158332 RRID: AB_2315274 RRID: AB_2534069 RRID: AB_2534102 Visual ecology |
description |
The retinae of many bird species contain a depression with high photoreceptor density known as the fovea. Many species of raptors have two foveae, a deep central fovea and a shallower temporal fovea. Birds have six types of photoreceptors: rods, active in dim light, double cones that are thought to mediate achromatic discrimination, and four types of single cones mediating color vision. To maximize visual acuity, the fovea should only contain photoreceptors contributing to high-resolution vision. Interestingly, it has been suggested that raptors might lack double cones in the fovea. We used transmission electron microscopy and immunohistochemistry to evaluate this claim in five raptor species: the common buzzard (Buteo buteo), the honey buzzard (Pernis apivorus), the Eurasian sparrowhawk (Accipiter nisus), the red kite (Milvus milvus), and the peregrine falcon (Falco peregrinus). We found that all species, except the Eurasian sparrowhawk, lack double cones in the center of the central fovea. The size of the double cone-free zone differed between species. Only the common buzzard had a double cone-free zone in the temporal fovea. In three species, we examined opsin expression in the central fovea and found evidence that rod opsin positive cells were absent and violet-sensitive cone and green-sensitive cone opsin positive cells were present. We conclude that not only double cones, but also single cones may contribute to high-resolution vision in birds, and that raptors may in fact possess high-resolution tetrachromatic vision in the central fovea. |
format |
Article in Journal/Newspaper |
author |
Mitkus, Mindaugas Olsson, Peter Toomey, Matthew B Corbo, Joseph C Kelber, Almut |
author_facet |
Mitkus, Mindaugas Olsson, Peter Toomey, Matthew B Corbo, Joseph C Kelber, Almut |
author_sort |
Mitkus, Mindaugas |
title |
Specialized photoreceptor composition in the raptor fovea |
title_short |
Specialized photoreceptor composition in the raptor fovea |
title_full |
Specialized photoreceptor composition in the raptor fovea |
title_fullStr |
Specialized photoreceptor composition in the raptor fovea |
title_full_unstemmed |
Specialized photoreceptor composition in the raptor fovea |
title_sort |
specialized photoreceptor composition in the raptor fovea |
publisher |
John Wiley & Sons Inc. |
publishDate |
2017 |
url |
https://lup.lub.lu.se/record/e2e39a04-c0b8-4eed-affb-e917a0ece840 https://doi.org/10.1002/cne.24190 |
genre |
Falco peregrinus peregrine falcon |
genre_facet |
Falco peregrinus peregrine falcon |
op_source |
Journal of Comparative Neurology; 525(9), pp 2152-2163 (2017) ISSN: 0021-9967 |
op_relation |
https://lup.lub.lu.se/record/e2e39a04-c0b8-4eed-affb-e917a0ece840 http://dx.doi.org/10.1002/cne.24190 scopus:85014879985 pmid:28199005 wos:000400585200007 |
op_doi |
https://doi.org/10.1002/cne.24190 |
container_title |
Journal of Comparative Neurology |
container_volume |
525 |
container_issue |
9 |
container_start_page |
2152 |
op_container_end_page |
2163 |
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1797582368507166720 |