The effect of atmospheric exposure on growth rates

Discussion in 'SPS Corals' started by Istio, 10 Oct 2013.

  1. Istio

    Istio

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    Last edited: 10 Oct 2013
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  3. Istio

    Istio Thread Starter

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  4. Lord_Blackadder

    Lord_Blackadder

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    I doubt it has much effect at all.
     
  5. 3dd

    3dd

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    WOOOOOOW SPS heaven
     
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  6. Visser

    Visser MASA Contributor

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    Might have a short term effect on polyp extension & growth (perhaps a day or 2), but corals should be OK long term.
    That is an awesome shot... Wonder where that was taken.
    Remember, reefs like that will only be exposed 2 times per year when equinox tide & spring tides overlap...
    Corals like those sps's living in very shallow reefs have adapted to exposure to air as most of those corals is exposed with wave action on every low tide.
    Some shallow lagoon reefs are totally exposed at almost every spring tide.

    A good friend of mine was lucky enough to have dived on the shallow reefs close to sharm el-sheikh & Ras Mohammed in the red sea on an equinox low tide, & said it was one of the best dives he's ever had as all the fish that used to swim on top of the reef was on the sides of the reef which caused a massive concentration of reef fish during the dive.
     
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  7. Istio

    Istio Thread Starter

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  8. Visser

    Visser MASA Contributor

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  9. Visser

    Visser MASA Contributor

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  10. Istio

    Istio Thread Starter

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    Thank you Visser, yip there is a lot about stress, ecology ect.. Was just wondering if anyone has ever specificallly compared growth rates and or aragonite density for exposed/non-exposed colonies.
     
  11. dallasg

    dallasg Moderator MASA Contributor

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    great question, i know they do secrete a protective slime layer, i think over at coralscience.org and secore.org they are looking deeper
     
  12. 4age

    4age

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    yoh...ma se..:drool5::y13::shocked::drool5::drool5::y13::y13:
     
  13. Visser

    Visser MASA Contributor

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    Thats a lot of clams!!!
     
  14. RiaanP

    RiaanP Moderator

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    Would those clams survive being out of the water. Seems a few dead ones here and there.
    If it is a yearly occurrence, then surely they must, as they seems big and they had to survive last year.
     
  15. Visser

    Visser MASA Contributor

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    Clams might have a higher mortality than sps as they have a lot more "flesh" that coulp dry out. But then again... Like you said riaan, they wont be so many large clams if they werent able to survive that.
     
  16. JackSplat

    JackSplat

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    Wow, amazing shots, wonder where that is, need to go there :)
     
  17. Istio

    Istio Thread Starter

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    Those clams are on an island off of Australia, they are farmed in an intertidal zone..check out this one!!

    [ame="http://www.flickr.com/photos/megforbes/7160965012/"]Giant clam exposed by the low tide | Flickr - Photo Sharing![/ame]
     
  18. Visser

    Visser MASA Contributor

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    Holy clams! Ok, ive seen some large clams on dives all over, but that has to be the biggest by far!!!
     
  19. MistaOrange

    MistaOrange

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    Clam chowder anyone?
     
  20. jimilutz

    jimilutz

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    I had the fortune of going to Heron Island on the Barrier Reef in July and seeing this for myself. Here are some photos of high and low tide at the same spot. What you will see is that the acropora tends to stay quite flat on top, kind of like a brush cut. This was not spring tide but a normal daily low tide. The clam photo was taken as the tide was running out, the wall you see in the second photo was full of them and as you see they get totally exposed at low tide.
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  21. puffer fish

    puffer fish

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    how do i find post number 1000
     
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