[Coral-List] White spined diadema

[andrew ross]

The white spines seem to appear in deeper water and in animals that are on their own/at lower population densities, so low-vis/low light make sense. Phil Dustan has photos from about 10-15m in a deep groove that show white spines from '72 in Montego Bay, so pre-'83 die-off.
I've not seen a paper on this, sorry.
A

--- On Fri, 5/9/08, John Ware <jware at erols.com> wrote:

> From: John Ware <jware at erols.com>
> Subject: Re: [Coral-List] White spined diadema
> To: "Stuart P. Wynne" <Stuart.Wynne at gov.ai>
> Cc: coral-list at coral.aoml.noaa.gov
> Date: Friday, May 9, 2008, 10:06 PM
> Stuart,
> 
> I was hoping that someone who had firm knowledge would
> respond, because 
> my memory is old and feeble.  Some 15 or 20 years ago I
> read a paper 
> (which I cannot recall or find) that stated that the
> white-spined D.a. 
> were more often found in low visibility environments.  At
> least that is 
> my recollection.
> 
> John
> 
> Stuart P. Wynne wrote:
> 
> >Dear all,
> >
> > 
> >
> >I have been trying to find references to the white
> spined Diadema
> >antillarum that I sometimes see in our waters here in
> Anguilla. As I am
> >not privy to open access (but please let us not get
> onto that subject
> >again!) I have been struggling to find any mention of
> the causes for
> >this, only the fact that it is a fairly common thing to
> see. I guess it
> >is a lack of pigment? As all such individuals I've
> seen here are large,
> >could it be something that signifies they are reaching
> old age? Does it
> >indicate a lack of something in their diet?
> Pollution/eutrophication? If
> >anyone has any ideas/knowledge I would love to learn.
> >
> > 
> >
> >On a separate note I would like to send out a big thank
> you to the three
> >people who posted on the coral-list vol 59 issue 6. For
> the first time
> >since I have been a member I did not have to wade
> through endless reams
> >of old postings (that had been left tagged to the
> bottom of their entry)
> >while trying to figure out which messages were the new
> messages. Well
> >done! Maybe we can keep this up?
> >
> > 
> >
> > 
> >
> >Stuart Wynne
> >Marine Biologist
> >Department of Fisheries and Marine Resources
> >Anguilla
> >
> >
> >
> > 
> >
> >
> >
> >
> >Government of Anguilla
> >_______________________________________________
> >Coral-List mailing list
> >Coral-List at coral.aoml.noaa.gov
> >http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
> >
> >  
> >
> 
> -- 
>    
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