[Coral-List] pocillopora damicornis settlement rates

OA - JArcher jarcher at oceanadventure.com.ph
Mon Jan 12 02:06:08 EST 2004

Try to minimise light, especially red spectrum stuff. Maybe keep it in the dark. Diatoms will still settle and the biofilm will still develop, hopefully in the absence of green algae.

Good luck

  ----- Original Message ----- 
  From: Wendy Chen 
  To: jarcher at oceanadventure.com.ph 
  Sent: Monday, January 12, 2004 2:29 PM
  Subject: Re: [Coral-List] pocillopora damicornis settlement rates

  Thanks for the insight. I tried to leave my glassware to soak in seawater longer, but I was getting a lot of green seaweed growing on it. It was very difficult trying to take that out without taking the biofilm at all. When I left the seaweed in, the larve died within a half a day even in the control that only had filter seawater. I think that my problem may be that there is no water movement in the glass containers. I need to find a way to create some type of movement, no matter how minimal. I will try that out next week. Thanks again. 

  Wendy Chen 
  aka Woon Jaye Chen 
  >From: "OA - JArcher" 
  >Reply-To: "OA - JArcher" 
  >To: "Wendy Chen" 
  >Subject: Re: [Coral-List] pocillopora damicornis settlement rates 
  >Date: Mon, 12 Jan 2004 12:39:13 +0800 
  >I don't have a lot of experience, but I find that if you age the settlement 
  >plates a little more than a few days,  then the consistancy of results 
  >improves - to a certain extent, and with limitations. I feel that the 
  >problem may lie in the initial competition/succession rates of the pioneer 
  >species, with patchy cover of biofilm due to competition and growth rates of 
  >any of the multiple species of bacteria that colonise. I find that if we 
  >leave plates longer, then we get a good cover of bacteria and a usually a 
  >stable cover of diatoms on top of that. This also provides good food for our 
  >own needs in terms of culturing corals, echinoderm and holothurian larve. 
  >It also depends on the nature of the substrate you are using. New Cement or 
  >firbous plates contains leachates which are found in varying concentrations 
  >around the surface which may have an inhibitory effect on subsequent 
  >colonisation and growth. 
  >Jeff Archer 
  >Director of Aquatics and Marine Operations 
  >Ocean Adventure 
  >Camayan Wharf 
  >West Ilanin Forest Area 
  >Subic Bay Freeport Zone 
  >Zambales 2222 
  >Phone: +63 47 252 9000 ext 223 
  >Direct: +63 47 252 8982 
  >Fax: +63 47 252 9000 
  >Mobile: +63 920 900 9770 
  >Email: jarcher at oceanadventure.com.ph 
  >Dive Enquiries: dive at oceanadventure.com.ph 
  >Website: www.oceanadventure.com.ph 
  >----- Original Message ----- 
  >From: "Wendy Chen" 
  >Sent: Tuesday, January 06, 2004 10:40 AM 
  >Subject: [Coral-List] pocillopora damicornis settlement rates 
  > > 
  > >    Hi!  I'm  a  grad  student  in  Guam  working on toxicity studies with 
  > >    pocillopora  damicornis  larvae.  I'm  having  some  trouble  with  my 
  > >    controls. I'm settling out larvae in glassware with biofilm on it. The 
  > >    glassware  was  conditioned by placing it in flowing seawater from 2-4 
  > >    days  to  allow the biofilm to develop. My problem is that sometimes I 
  > >    get  very high rates of settlement from 70-100% and then other months, 
  > >    I  get 3-15% settlement. All the experiments are run exactly the same, 
  > >    but  yet I get a lot of variability. So I was wondering if anyone else 
  > >    has   some   experience   with  dealing  with  pocillopora  damicornis 
  > >    settlement  or  if you can direct me to some references. I only have a 
  > >    Hodgson  paper  from  1972 and a more recent one from Taiwan. Any help 
  > >    would be greatly appreciated. Thanks. 
  > >    Wendy Chen 
  > >    aka Woon Jaye Chen 
  > >      _________________________________________________________________ 
  > > 
  > >    STOP MORE SPAM with [1]the new MSN 8 and get 2 months FREE* 
  > > 
  > > References 
  > > 
  > >    1. http://g.msn.com/8HMAEN/2728??PS= 
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  > > Coral-List at coral.aoml.noaa.gov 
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  > > 
  > > 

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