For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals
Most terrestrial mammals have colour vision based on two spectrally different visual pigments located in two types of retinal cone photoreceptors, i.e. they are cone dichromats with long-to-middle-wave-sensitive (commonly green) L-cones and short-wave-sensitive (commonly blue) S-cones. With visual p...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2001
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.616 http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.486.616 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.486.616 2023-05-15T18:33:32+02:00 For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals Leo Peichl Guènther Behrmann Ronald H. H. Kroèger The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.616 http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.616 http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf colour vision cone photoreceptors mammalian retina pinnipeds whales text 2001 ftciteseerx 2016-01-08T08:13:44Z Most terrestrial mammals have colour vision based on two spectrally different visual pigments located in two types of retinal cone photoreceptors, i.e. they are cone dichromats with long-to-middle-wave-sensitive (commonly green) L-cones and short-wave-sensitive (commonly blue) S-cones. With visual pigment-speci®c antibodies, we here demonstrate an absence of S-cones in the retinae of all whales and seals studied. The sample includes seven species of toothed whales (Odontoceti) and ®ve species of marine carnivores (eared and earless seals). These marine mammals have only L-cones (cone monochromacy) and hence are essentially colour-blind. For comparison, the study also includes the wolf, ferret and European river otter (Carnivora) as well as the mou¯on and pygmy hippopotamus (Artiodactyla), close terrestrial relatives of the seals and whales, respectively. These have a normal complement of S-cones and L-cones. The S-cone loss in marine species from two distant mammalian orders strongly argues for convergent evolution and an adaptive advantage of that trait in the marine visual environment. To us this suggests that the S-cones may have been lost in all whales and seals. However, as the spectral composition of light in clear ocean waters is increasingly blue-shifted with depth, an S-cone loss would seem particularly disadvantageous. We discuss some hypotheses to explain this paradox. Text toothed whales Unknown Cones The ENVELOPE(78.344,78.344,-68.635,-68.635) Cones, The ENVELOPE(78.344,78.344,-68.635,-68.635) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
colour vision cone photoreceptors mammalian retina pinnipeds whales |
spellingShingle |
colour vision cone photoreceptors mammalian retina pinnipeds whales Leo Peichl Guènther Behrmann Ronald H. H. Kroèger For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
topic_facet |
colour vision cone photoreceptors mammalian retina pinnipeds whales |
description |
Most terrestrial mammals have colour vision based on two spectrally different visual pigments located in two types of retinal cone photoreceptors, i.e. they are cone dichromats with long-to-middle-wave-sensitive (commonly green) L-cones and short-wave-sensitive (commonly blue) S-cones. With visual pigment-speci®c antibodies, we here demonstrate an absence of S-cones in the retinae of all whales and seals studied. The sample includes seven species of toothed whales (Odontoceti) and ®ve species of marine carnivores (eared and earless seals). These marine mammals have only L-cones (cone monochromacy) and hence are essentially colour-blind. For comparison, the study also includes the wolf, ferret and European river otter (Carnivora) as well as the mou¯on and pygmy hippopotamus (Artiodactyla), close terrestrial relatives of the seals and whales, respectively. These have a normal complement of S-cones and L-cones. The S-cone loss in marine species from two distant mammalian orders strongly argues for convergent evolution and an adaptive advantage of that trait in the marine visual environment. To us this suggests that the S-cones may have been lost in all whales and seals. However, as the spectral composition of light in clear ocean waters is increasingly blue-shifted with depth, an S-cone loss would seem particularly disadvantageous. We discuss some hypotheses to explain this paradox. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Leo Peichl Guènther Behrmann Ronald H. H. Kroèger |
author_facet |
Leo Peichl Guènther Behrmann Ronald H. H. Kroèger |
author_sort |
Leo Peichl |
title |
For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
title_short |
For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
title_full |
For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
title_fullStr |
For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
title_full_unstemmed |
For Whales and Seals the Ocean is Not Blue: A Visual Pigment Loss in Marine Mammals |
title_sort |
for whales and seals the ocean is not blue: a visual pigment loss in marine mammals |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.616 http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf |
long_lat |
ENVELOPE(78.344,78.344,-68.635,-68.635) ENVELOPE(78.344,78.344,-68.635,-68.635) |
geographic |
Cones The Cones, The |
geographic_facet |
Cones The Cones, The |
genre |
toothed whales |
genre_facet |
toothed whales |
op_source |
http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.616 http://www-stud.rbi.informatik.uni-frankfurt.de/~krotzky/Neuro-Seminar/Peichl1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766218153874948096 |