[Coral-List] weird bleaching in baja

[Todd Barber]

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
>
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