[Coral-List] weird bleaching in baja

[Keven Reed]

Dear Todd,
    In your response to Hector on 11 May:
"some rules of thumb, such as not moving a coral more than 10 shallower in a 
single stage....but in reality you can do more at deeper depths, and less 
very shallow water so it is best to use a light meter to determine your step 
increments. ).  [Note: This limitation is only when going from lower light 
intensities to higher light intensities and when moving coral species within 
the depth and lighting intensity ranges for that particular species].",

what were the units you implied, but I believe omitted, after the number ten?  distance (meters) or light intensity units from your light meter?  
Thanks,
Keven

Keven Reed, O.D.
Naval Optometrist
Orange Park, FL  32003




  ----- Original Message ----- 
  From: Todd Barber 
  To: hreyes ; coral-list 
  Sent: Thursday, May 11, 2006 8:34 AM
  Subject: Re: [Coral-List] weird bleaching in baja


  Hi Hector,

  You may be on to something,  in all of our coral propagation work we have 
  noted that it is not safe to bring coral fragments up too much in light 
  intensity in one step,  (such as to shallower waters or different 
  shading/lighting positions on the reef even when the species of coral we are 
  working with can be adapted to the new depth range).  (When it is necessary 
  to move corals to a higher intensity environment, it can be done safely in 
  stages, each taking about  a week or two, depending upon species.  There are 
  some rules of thumb, such as not moving a coral more than 10 shallower in a 
  single stage....but in reality you can do more at deeper depths, and less 
  very shallow water so it is best to use a light meter to determine your step 
  increments. ).  [Note: This limitation is only when going from lower light 
  intensities to higher light intensities and when moving coral species within 
  the depth and lighting intensity ranges for that particular species].

  Therefore, if the clear water occured quickly, you could be experiancing 
  this effect.  We call it "sun burning"....but I am not sure if it is related 
  to UV or general light intensity.  Maybe someone on the list can answer that 
  question.

  Thanks,

  Todd R. Barber
  Chairman, Reef Ball Foundation

  3305 Edwards Court,
  Greenville, NC 27858
  941-720-7549 Cell
  252-353-9094 Direct
  Skype Toddbarber
  MSN messenger reefball at hotmail.com
  reefball at reefball.com (email address)




  ----- Original Message ----- 
  From: "hreyes" <hreyes at uabcs.mx>
  To: "coral-list" <coral-list at coral.aoml.noaa.gov>
  Sent: Wednesday, May 10, 2006 12:16 PM
  Subject: [Coral-List] weird bleaching in baja


  > dear coral listers. in the last month we have noticed some bleaching in
  > pocilloporid corals from loreto to cabo san lucas (25 to 22N in the gulf 
  > of
  > california). water temperature is normal (from 22 to 25o in surface), but 
  > the
  > water is unusually transparent. does anybody has seen something like that
  > elsewhere? we think that the problem is caused by UV light but we have no 
  > data
  > to test the idea. is there any uv light database in the web? gracias!
  >
  > Hector Reyes
  >
  > "Stay hard, stay hungry, stay alive.
  > If you can.
  > And meet me in a dream of this hard land"
  > A quien corresponda, de parte del Jefe Springsteen
  >
  > Hector Reyes Bonilla
  > Universidad Autonoma de Baja California Sur
  > Departamento de Biologia Marina
  > Ap. postal 19-B, CP 23080
  > La Paz, B.C.S., MEXICO
  > Tel. (612) 123-8800, ext. 4180
  > Fax: (612)123-8819
  >
  > _______________________________________________
  > Coral-List mailing list
  > Coral-List at coral.aoml.noaa.gov
  > http://coral.aoml.noaa.gov/mailman/listinfo/coral-list 

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