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The visual ecology of a deep-sea fish, the escolar Lepidocybium flavobrunneum (Smith, 1843).

Landgren, Eva LU ; Fritsches, Kerstin ; Brill, Richard and Warrant, Eric LU orcid (2014) In Philosophical Transactions of the Royal Society B: Biological Sciences 369(1636).
Abstract
Escolar (Lepidocybium flavobrunneum, family Gempylidae) are large and darkly coloured deep-sea predatory fish found in the cold depths (more than 200 m) during the day and in warm surface waters at night. They have large eyes and an overall low density of retinal ganglion cells that endow them with a very high optical sensitivity. Escolar have banked retinae comprising six to eight layers of rods to increase the optical path length for maximal absorption of the incoming light. Their retinae possess two main areae of higher ganglion cell density, one in the ventral retina viewing the dorsal world above (with a moderate acuity of 4.6 cycles deg(-1)), and the second in the temporal retina viewing the frontal world ahead. Electrophysiological... (More)
Escolar (Lepidocybium flavobrunneum, family Gempylidae) are large and darkly coloured deep-sea predatory fish found in the cold depths (more than 200 m) during the day and in warm surface waters at night. They have large eyes and an overall low density of retinal ganglion cells that endow them with a very high optical sensitivity. Escolar have banked retinae comprising six to eight layers of rods to increase the optical path length for maximal absorption of the incoming light. Their retinae possess two main areae of higher ganglion cell density, one in the ventral retina viewing the dorsal world above (with a moderate acuity of 4.6 cycles deg(-1)), and the second in the temporal retina viewing the frontal world ahead. Electrophysiological recordings of the flicker fusion frequency (FFF) in isolated retinas indicate that escolar have slow vision, with maximal FFF at the highest light levels and temperatures (around 9 Hz at 23°C) which fall to 1-2 Hz in dim light or cooler temperatures. Our results suggest that escolar are slowly moving sit-and-wait predators. In dim, warm surface waters at night, their slow vision, moderate dorsal resolution and highly sensitive eyes may allow them to surprise prey from below that are silhouetted in the downwelling light. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
deep-sea vision, eye, escolar, visual ecology, visual sensitivity, visual resolution
in
Philosophical Transactions of the Royal Society B: Biological Sciences
volume
369
issue
1636
article number
20130039
publisher
Royal Society Publishing
external identifiers
  • pmid:24395966
  • wos:000332465800008
  • scopus:84891649696
  • pmid:24395966
ISSN
1471-2970
DOI
10.1098/rstb.2013.0039
language
English
LU publication?
yes
id
48495489-4d8a-4dc9-b7de-b17bcf820cd0 (old id 4291961)
date added to LUP
2016-04-01 11:07:30
date last changed
2021-09-22 04:34:14
@article{48495489-4d8a-4dc9-b7de-b17bcf820cd0,
  abstract     = {Escolar (Lepidocybium flavobrunneum, family Gempylidae) are large and darkly coloured deep-sea predatory fish found in the cold depths (more than 200 m) during the day and in warm surface waters at night. They have large eyes and an overall low density of retinal ganglion cells that endow them with a very high optical sensitivity. Escolar have banked retinae comprising six to eight layers of rods to increase the optical path length for maximal absorption of the incoming light. Their retinae possess two main areae of higher ganglion cell density, one in the ventral retina viewing the dorsal world above (with a moderate acuity of 4.6 cycles deg(-1)), and the second in the temporal retina viewing the frontal world ahead. Electrophysiological recordings of the flicker fusion frequency (FFF) in isolated retinas indicate that escolar have slow vision, with maximal FFF at the highest light levels and temperatures (around 9 Hz at 23°C) which fall to 1-2 Hz in dim light or cooler temperatures. Our results suggest that escolar are slowly moving sit-and-wait predators. In dim, warm surface waters at night, their slow vision, moderate dorsal resolution and highly sensitive eyes may allow them to surprise prey from below that are silhouetted in the downwelling light.},
  author       = {Landgren, Eva and Fritsches, Kerstin and Brill, Richard and Warrant, Eric},
  issn         = {1471-2970},
  language     = {eng},
  number       = {1636},
  publisher    = {Royal Society Publishing},
  series       = {Philosophical Transactions of the Royal Society B: Biological Sciences},
  title        = {The visual ecology of a deep-sea fish, the escolar Lepidocybium flavobrunneum (Smith, 1843).},
  url          = {http://dx.doi.org/10.1098/rstb.2013.0039},
  doi          = {10.1098/rstb.2013.0039},
  volume       = {369},
  year         = {2014},
}