Cephalopod Eyes and Light Sensing Skin

Discussion in 'Physiology and Biology' started by DWhatley, May 6, 2014.

  1. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Humans, Squid Evolved Same Eyes with Same Gene
    Tue, 05/06/2014 - 12:00pm
    The Conversation, Malcolm Campbell

    [​IMG]

    Complex beauty. Image: pacificklaus, CC BY-NC


     
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  2. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Introduction to: Cephalopod Vision
    Dr. James Wood and Kelsie Jackson (pdf)

     
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  3. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Marine Life Series: Octopus Eyes
    Mark H 2007

     
  4. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Comparisons of visual capabilities in modern cephalopods from shallow water to deep sea
    Chung, Wen-sung 2014 PhD Thesis

    Abstract contains an explanation of bobbing behavior and eye blurring to clearly locate an object.
     
  5. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Some Evidence for Colour-Blindness in Octopus
    BY J. B. MESSENGER, A. P. WILSON AND A. HEDGE 1973 (full pdf)

     
  6. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Sensitivity to Blue light and using blue moonlights instead of red. This is a paper written under Doctor Hanlon that shows the biological reasons for S. Officinalis being sensitive to blue light. It is significant to ceph keepers as it is often mentioned but difficult to find scientific studies.

    The paragraph that suggests blue sensitivity:

    Here is a color chart that shows the color bands in these wave lengths. In brief Blue->Cyan-Green:440-565 (590 = yellow)
    Unfortunately, the study was intended to find the short wave length limits and the longer, red colors were not included in the experiment (oddly this paper was referenced as the source of cephalopods not seeing red but is not part of the paper at all)

    UV Radiation Blocking Compounds in the Eye of the Cuttlefish Sepia officinalis
    Nadav Shashar, Ferenc I. Hdrosi, Anastazia T. Banaszak’, and Roger T. Hanlon (Marine Biological Laboratory, Woods Hole, Massachusetts 02543)

    A 1968 research paper by D.I. Hamasaki, The era-determination spectral sensitivity of the Octopus, should identify the red spectrum blindness but I have not been able to locate even the abstract.
     
    Last edited: Apr 22, 2015
  7. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Eye-independent, light-activated chromatophore expansion (LACE) and expression of phototransduction genes in the skin of Octopus bimaculoides M. Desmond Ramirez, Todd H. Oakley 2015 (See this thread to obtain a copy of the paper)

    We know that octopuses accept red light as no or very little light and there have been indications that blue light may be brighter to them than white light, suggesting using a blue moon light is not a good idea for night viewing. The recent study showing the skin itself is light sensitive and uses the same light sensing proteins found in the eyes. The study shows that there is no chromatophore expansion with red light, notable expansion with white light and the greatest expansion with blue light supporting the current thinking about light sensitivity.

     
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  8. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    On the three visual pigments in the retina of the firefly squid, Watasenia scintillans
    Masatsugu Seidou, Michio Sugahara, Hisatoshi Uchiyama, Kenji Hiraki, Toshiaki Hamanaka,Masanao Michinomae, Kazuo Yoshihara, Yuji Kito 2015 (subscription)

     
  9. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    An unexpected diversity of photoreceptor classes in the Longfin squid, Doryteuthis pealeii
    Kingston, Alexandra C. N., Wardill, Trevor J.,Hanlon, Roger T.,Cronin, Thomas W. 2015 (Woods Hole Open Access Server)

     
  10. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Why octopuses? Have we learned anything from studying their brains?
    J. B. Messenger
    Science Progress (1933-)
    Vol. 72, No. 3 (287) (1988), pp. 297-320

    Older (1988) article that can be fully accessed by registering for a free account. linking here because of the interesting section on octopus sight, noting that they cannot distinguish between a right and skewed figure.
     
  11. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    A Novel Mechanism for Color Vision: Pupil Shape and Chromatic Aberration Can Provide Spectral Discrimination for Color Blind Organisms.
    Alexander L Stubbs, Christopher W Stubbs 2016 (BioRxRv - pre-peer review PDF)
    video briefly explaining this concept.


    Full text with images in the Proceedings of the National Academy of Sciences of the United States of America
     
    Last edited: Jul 9, 2016
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  12. GPO87

    GPO87 Sepia elegans Staff Member Moderator

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  13. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    This Squid Has Glowing Eyeshadow That Acts Like An Invisibility Cloak
    NatGeo Phenomena Ed Yong 2016

     
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  14. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Camouflage artists, in color
    Study proposes explanation for how cephalopods see color, despite black and white vision
    HARVARD UNIVERSITY 2016 (summary)

     
  15. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Comparative visual ecology of cephalopods from different habitats
    Wen-Sung Chung, N. Justin Marshall 2016 (Proceedings of theRoyal Society B full article)

     

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