Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae)
Accessory corner cones (ACC) have recently been suggested to be UV-sensitive photoreceptor cells. With a view toward explaining prey detection, we examined the topography of retinal ganglion cells and ACCs in two Antarctic nototheniids occupying different ecological niches: the cryopelagic Pagotheni...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2002
|
Subjects: | |
Online Access: | https://repo.qst.go.jp/?action=repository_uri&item_id=43021 http://id.nii.ac.jp/1657/00043008/ |
id |
ftnirs:oai:repo.qst.go.jp:00043021 |
---|---|
record_format |
openpolar |
spelling |
ftnirs:oai:repo.qst.go.jp:00043021 2023-05-15T13:46:39+02:00 Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) Miyazaki Taeko Iwami Tetsuo Somiya Hiroaki Meyerrochow Benno 2002 https://repo.qst.go.jp/?action=repository_uri&item_id=43021 http://id.nii.ac.jp/1657/00043008/ en eng https://repo.qst.go.jp/?action=repository_uri&item_id=43021 http://id.nii.ac.jp/1657/00043008/ Zoological Science, 19, 1223-1229(2002) 0289-0003 Journal Article 2002 ftnirs 2021-12-30T07:35:09Z Accessory corner cones (ACC) have recently been suggested to be UV-sensitive photoreceptor cells. With a view toward explaining prey detection, we examined the topography of retinal ganglion cells and ACCs in two Antarctic nototheniids occupying different ecological niches: the cryopelagic Pagothenia borchgrevinki and the benthic Trematomus bernacchii. Isodensity maps of retinal ganglion cells showed that the main visual axis, coincident with the feeding vector, was in a forward direction in both species. Visual acuity was determined as 3.64 and 4.77 cycles/degree for the respective species. In P. borchgrevinki the highest density of ACCs was associated with the eye’s main visual axis. This suggested that this species uses UV-vision during forward-swims and probably in encounters with prey. On the other hand, T. bernacchii possessed two horizontal band-shaped high-density areas of ACCs, which stretched from temporal to nasal and ventral to peripheral retinal regions. Therefore, this species apprears to use UV-vision to watch prey across the entire circumference of the lateral area and in the water column above its head. Article in Journal/Newspaper Antarc* Antarctic National Institute of Radiological Science: NIRS-Repository Antarctic |
institution |
Open Polar |
collection |
National Institute of Radiological Science: NIRS-Repository |
op_collection_id |
ftnirs |
language |
English |
description |
Accessory corner cones (ACC) have recently been suggested to be UV-sensitive photoreceptor cells. With a view toward explaining prey detection, we examined the topography of retinal ganglion cells and ACCs in two Antarctic nototheniids occupying different ecological niches: the cryopelagic Pagothenia borchgrevinki and the benthic Trematomus bernacchii. Isodensity maps of retinal ganglion cells showed that the main visual axis, coincident with the feeding vector, was in a forward direction in both species. Visual acuity was determined as 3.64 and 4.77 cycles/degree for the respective species. In P. borchgrevinki the highest density of ACCs was associated with the eye’s main visual axis. This suggested that this species uses UV-vision during forward-swims and probably in encounters with prey. On the other hand, T. bernacchii possessed two horizontal band-shaped high-density areas of ACCs, which stretched from temporal to nasal and ventral to peripheral retinal regions. Therefore, this species apprears to use UV-vision to watch prey across the entire circumference of the lateral area and in the water column above its head. |
format |
Article in Journal/Newspaper |
author |
Miyazaki Taeko Iwami Tetsuo Somiya Hiroaki Meyerrochow Benno |
spellingShingle |
Miyazaki Taeko Iwami Tetsuo Somiya Hiroaki Meyerrochow Benno Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
author_facet |
Miyazaki Taeko Iwami Tetsuo Somiya Hiroaki Meyerrochow Benno |
author_sort |
Miyazaki Taeko |
title |
Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
title_short |
Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
title_full |
Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
title_fullStr |
Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
title_full_unstemmed |
Retinal Topography of Ganglion Cells and Putative UV-Sensitive Cones in Two Antarctic Fishes: Pagothenia borchgrevinki and Trematomus bernacchii (Nototheniidae) |
title_sort |
retinal topography of ganglion cells and putative uv-sensitive cones in two antarctic fishes: pagothenia borchgrevinki and trematomus bernacchii (nototheniidae) |
publishDate |
2002 |
url |
https://repo.qst.go.jp/?action=repository_uri&item_id=43021 http://id.nii.ac.jp/1657/00043008/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://repo.qst.go.jp/?action=repository_uri&item_id=43021 http://id.nii.ac.jp/1657/00043008/ Zoological Science, 19, 1223-1229(2002) 0289-0003 |
_version_ |
1766245009053450240 |