[Coral-List] White spined diadema

[Robert Miller]

Hi,Somewhere out there is an old study that showed, I believe, that juvenile
Diadema that were raised in the dark were all white.  Other studies have
shown, as John Ware says, that more white ones are found deeper and under
rocks etc.  Unfortunately I don't have the references now.
good luck,
Bob

On Fri, May 9, 2008 at 10:06 AM, John Ware <jware at erols.com> wrote:

> 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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-- 
Robert J. Miller
Marine Science Institute
University of California, Santa Barbara
Santa Barbara CA 93106-6150
(805) 893-7295