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Structure and optics of the eyes of the box jellyfish Chiropsella bronzie.

O'Connor, Megan LU ; Garm, Anders and Nilsson, Dan-E LU (2009) In Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology 195. p.557-569
Abstract
Cubomedusae have a total of 24 eyes of four morphologically different types. Two of these eye types are camera-type eyes (upper and lower lens-eye), while the other two eye types are simpler pigment pit eyes (pit and slit eye). Here, we give a description of the visual system of the box jellyfish species Chiropsella bronzie and the optics of the lens eyes in this species. One aim of this study is to distinguish between general cubozoan features and species-specific features in the layout and optics of the eyes. We find that both types of lens eyes are more severely under-focused in C. bronzie than those in the previously investigated species Tripedalia cystophora. In the lower lens-eye of C. bronzie, blur circles subtend 20 and 52 degrees... (More)
Cubomedusae have a total of 24 eyes of four morphologically different types. Two of these eye types are camera-type eyes (upper and lower lens-eye), while the other two eye types are simpler pigment pit eyes (pit and slit eye). Here, we give a description of the visual system of the box jellyfish species Chiropsella bronzie and the optics of the lens eyes in this species. One aim of this study is to distinguish between general cubozoan features and species-specific features in the layout and optics of the eyes. We find that both types of lens eyes are more severely under-focused in C. bronzie than those in the previously investigated species Tripedalia cystophora. In the lower lens-eye of C. bronzie, blur circles subtend 20 and 52 degrees for closed and open pupil, respectively, effectively removing all but the coarsest structures of the image. Histology reveals that the retina of the lower lens-eye, in addition to pigmented photoreceptors, also contains long pigment-cells, with both dark and white pigment, where the dark pigment migrates on light/dark adaptation. Unlike the upper lens-eye lens of T.cystophora, the same eye in C.bronzie did not display any significant optical power. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
volume
195
pages
557 - 569
publisher
Springer
external identifiers
  • wos:000266584100004
  • scopus:67349263395
ISSN
1432-1351
DOI
10.1007/s00359-009-0431-x
language
English
LU publication?
yes
id
16dc71d2-f80d-4e8d-8c6a-90c0fbc9f0bb (old id 1392417)
date added to LUP
2009-05-12 09:22:29
date last changed
2017-08-13 03:50:08
@article{16dc71d2-f80d-4e8d-8c6a-90c0fbc9f0bb,
  abstract     = {Cubomedusae have a total of 24 eyes of four morphologically different types. Two of these eye types are camera-type eyes (upper and lower lens-eye), while the other two eye types are simpler pigment pit eyes (pit and slit eye). Here, we give a description of the visual system of the box jellyfish species Chiropsella bronzie and the optics of the lens eyes in this species. One aim of this study is to distinguish between general cubozoan features and species-specific features in the layout and optics of the eyes. We find that both types of lens eyes are more severely under-focused in C. bronzie than those in the previously investigated species Tripedalia cystophora. In the lower lens-eye of C. bronzie, blur circles subtend 20 and 52 degrees for closed and open pupil, respectively, effectively removing all but the coarsest structures of the image. Histology reveals that the retina of the lower lens-eye, in addition to pigmented photoreceptors, also contains long pigment-cells, with both dark and white pigment, where the dark pigment migrates on light/dark adaptation. Unlike the upper lens-eye lens of T.cystophora, the same eye in C.bronzie did not display any significant optical power.},
  author       = {O'Connor, Megan and Garm, Anders and Nilsson, Dan-E},
  issn         = {1432-1351},
  language     = {eng},
  pages        = {557--569},
  publisher    = {Springer},
  series       = {Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology},
  title        = {Structure and optics of the eyes of the box jellyfish Chiropsella bronzie.},
  url          = {http://dx.doi.org/10.1007/s00359-009-0431-x},
  volume       = {195},
  year         = {2009},
}