[Coral-List] Coral immortality

anura upasanta kumara wickrama arachchige waaukumara at gmail.com
Fri Mar 18 09:45:44 EDT 2011


My point of view is that we can not say anything about mortality
regarding carbonate system. However, there is evidence that polyps
gone senescence. These can be categorized in to either polyp level or
colony level. For instance, young polyps of A. palmata have
regenerated new polyps (injury repair) withing 1 week, and older
polyps have taken 25 days. Mean testes volume of A. palifera has
decreased with colony age. There are several other studies on
explaining this life history character which complected. Anyway, we
can not say polyps are immortal even though they produce new clone
through budding. Cheers.
kumara

On 3/18/11, Douglas Fenner <douglasfenner at yahoo.com> wrote:
> Each polyp goes on living (unless something kills it), connected to all the
> other polyps, a colony  is all one organism made of repeated polyp modules.
> Polyps are also a bit like individuals, when a colony breaks the fragment
> can
> live on as polyps are self-contained units.  Individual cells  are replaced
> I
> believe, as they are in some human tissues (especially skin and digestive
> system).    Doug
>
>
>
>
> ________________________________
> From: Roy Ducote <scubadivingdoc at yahoo.com>
> To: "Coral-List at coral.aoml.noaa.gov" <Coral-List at coral.aoml.noaa.gov>
> Sent: Thu, March 17, 2011 2:12:05 AM
> Subject: [Coral-List] Coral immortality
>
> Question from a non- academic:
>
> What is happening at the individual polyp level? Does each polyp go on
> living or
> is there regular polyp death and replacement so that the carbonate structure
> seems immortal but the individual biological organism is not?
>
>
> Sent from my iPhone
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-- 
School of Marine and Tropical Biology
Faculty of Science and Engineering
James Cook University
Townsville QLD 4811
Australia

e-mails: waaukumara at gmail.com



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