Suction Disks; Anatomy and Function

Discussion in 'Physiology and Biology' started by skywindsurfer, Dec 9, 2010.

  1. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    While handling my GPO this afternoon I noticed that there is a small hole at the center of each suction disk. When I touch the disks, what appears to be a valve like disk below the hole pulls inwards, allowing the hole to open up. I took a rough picture of it but I can't post it right now. I would've taken a video for better clarity but it was hard enough to get the picture. I think I have an idea as to the purpose of this hole, but could anyone tell me more about it and its function?
     
  2. SabrinaR

    SabrinaR Larger Pacific Striped Octopus Registered

    Joined:
    Oct 2, 2009
    Messages:
    1,462
    Likes Received:
    7
    I'm sorry you have what now?
     
  3. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    I must apologize but I do not understand your question.
     
  4. SabrinaR

    SabrinaR Larger Pacific Striped Octopus Registered

    Joined:
    Oct 2, 2009
    Messages:
    1,462
    Likes Received:
    7
    This is the confusing part. Please clarify.
     
  5. SabrinaR

    SabrinaR Larger Pacific Striped Octopus Registered

    Joined:
    Oct 2, 2009
    Messages:
    1,462
    Likes Received:
    7
    Ah I remember you work at an aquarium yes?
     
  6. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    I care for a GPO at work.
     
  7. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    That's right. Sorry for the confusion.
     
  8. Nancy

    Nancy Titanites Staff Member Moderator

    Joined:
    Nov 20, 2002
    Messages:
    5,584
    Likes Received:
    71
    Location:
    Dallas Texas
    You're fortunate to be able to care for a GPO. Does it interact much? Some of them seem to.

    Nancy
     
  9. Green_Tree

    Green_Tree O. vulgaris Registered

    Joined:
    Nov 15, 2009
    Messages:
    90
    Likes Received:
    0
    If i understood what you were describing correctly, as a valve-like disc below the hole pulling away from the hole when it wants to attach. Then it sounds to me like a plausible hypothesis for how exactly they are able to create suction on the arms so freely. But once again this is just my guess by what I think you were describing so i could be completely wrong.
     
  10. tonmo

    tonmo Titanites Staff Member Webmaster Moderator

    Joined:
    May 30, 2000
    Messages:
    8,737
    Likes Received:
    513
    Location:
    Pennsylvania
    Fwiw, that's what I thought too. Makes sense to me.

    What would be interesting would be to discern voluntary vs involuntary movement, which in itself has its own meaning when it comes to octopuses.
     
  11. cuttlegirl

    cuttlegirl Colossal Squid Supporter Registered

    Joined:
    Sep 16, 2005
    Messages:
    4,891
    Likes Received:
    236
    Location:
    Pittsburgh, PA
  12. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    I've had two so far and both were/are very interactive. I'll try to post some pictures and videos tonight, but no promises. I can say this though, the one we have now is about half grown and already strong enough to pull my shoulder out of socket. Not the best pet for a small person lol.
     
  13. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    It makes sense that this part of thr disk could be used like a diaphram to create suction, but could it also play a role in sensory perception?
     
  14. Green_Tree

    Green_Tree O. vulgaris Registered

    Joined:
    Nov 15, 2009
    Messages:
    90
    Likes Received:
    0
    Well if you accept the assumption that that hole has a diaphram behind it then it would be safe to say that when the suckers attach they bring in a small amount of water. Maybe there are sensory organs inside that function in much the same way as taste buds because it seems to me that they have to be able to taste or smell in some fashion since Iggy always gets active when i put mysis and brine shrimp in the tank and she is way back in her den where she could not see said shrimp.
     
  15. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
    Cephalopods do have organs somewhere inside either their mantel or buccal mass(spelling) that allows them to detect the "scent" of their prey. They also have the ability to "taste" via their suction disks.
     
  16. Green_Tree

    Green_Tree O. vulgaris Registered

    Joined:
    Nov 15, 2009
    Messages:
    90
    Likes Received:
    0
    Wow... I have not even made it all the way through that yet but lots of good information there.... also could be hard to read if you dont understand the technical jargon.
     
  17. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
  18. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
  19. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5
  20. skywindsurfer

    skywindsurfer Architeuthis Registered

    Joined:
    Aug 13, 2009
    Messages:
    1,723
    Likes Received:
    5

Share This Page