[Fwd: Nearshore vs. offshore bleaching]

Fri May 18 10:22:46 EDT 2001

Dear all,

About inshore-offshore changes in density, calcification rate and extension rate
in Montastraea annularis skeletons we observed that, as corals experience a
harsher environment, they respond by extending their skeletons more using the
same or less calcium carbonate (lower calcification rate), with a concomitant
reduction on skeletal density (the same as Bernard for massive Porites). For
more information, you can see Carricart-Ganivet and Merino. 2001. Growth
responses of the reef-building coral Montastraea annularis along a gradient of
continental influence in the southern Gulf of Mexico. Bull. Mar. Sci. 68(1):
145.

Please, if you reply this message, send me a copy <jpcarri at ecosur-qroo.mx>,
since I´m not in the list (my wife forwarded me the original message).

Best wishes,

Juan Pablo

> Subject: Re: Nearshore vs. offshore bleaching
> Date: Fri, 18 May 2001 12:42:01 -0300
> From: Bernard THOMASSIN <Bernard.Thomassin at com.univ-mrs.fr>
> To: debimack at auracom.com, coral-list at coral.aoml.noaa.gov
>
> >Debbie and all interested colleagues
>
> >Taking in account my remark :
> > >In fact coastal populations of corals (for the same species) are more
> >resistant to all the possible stresses that coral populations living in
> >more stable and constant seawater conditions.
> > >
>
> You say :
>
> >(The same is clearly true for our groundfish stocks, their resiliency to
> >various stressors, i.e. fishing pressure and climate change, is much higher
> >when they are located nearer to outflows of major rivers or mainland
> >shorelines. So is their growth rates, this is well documented...the
> >connection to enhanced feeding opportunities is rather hard to deny.)
> >
> >
> >About growth rates from massive corals (Porites lutea, and P.
> >lobata) our idea is supported also by results about the coral
> >calcification from Mayotte I. and SW Madagascar area (Tulear), both
> >sites being in the Mozambique Channel but separated by about 10
> >latitudinal degrees (13° S for Mayotte, 23° S for Tulear region)
> >(results from Kathrin PRIESS thesis, see PRIESS et al., 1997 ;  from
> >TESTREEF Program with W.C. DULLO, L. MONTAGGIONI, T. EISENHAUER, G.
> >HEISS, etc..):
>
> massive Porites living:
> - in "oceanic" waters on outer barrier reef slopes, or near large
> passages, growth more quickly but with a less dense skeleton,
> - those living in coastal "neritic" waters grow more slowly but with
> a more dense skeleton than the first.
>
> Unfortunatly we have not yet results for the metabolism rates and
> feeding rates.
>
> Interesting debate you opened. this is Science.
>
> Cheers,
>
> Bernard
>
> Bernard A. THOMASSIN
> Dir. recherches CNRS
> Centre d'Océanologie de Marseille,
> Station marine d'Endoume,
> Chemin de la batterie des Lions,
> 13007 Marseille,
> France
> &
> G.I.S. "LAG-MAY"
> "Environnement marin & littoral de
> l'île de Mayotte"
> tél. (33) 04 91 04 16 17 (ligne directe)
>      (33) 04 91 04 16 00 (standart)
> mobile (33) 06 63 14 91 78
> fax  (33) 04 91 04 16 35 (à l'attention de....)
>
> ~~~~~~~
> For directions on subscribing and unsubscribing to coral-list or the
> digests, please visit www.coral.noaa.gov, click on Popular on the
> menu bar, then click on Coral-List Listserver.

--

*************************************************
Dr. Juan P. Carricart-Ganivet
El Colegio de la Frontera Sur
Carretera Chetumal-Bacalar km 2, Zona Industrial No. 2
Apdo. Postal 424. Chetumal, Q. Roo. 77000.
MÉXICO

Tel: (9) 8321666 ext. 286
Fax: (9) 8320447 ext. 240
E-mail: jpcarri at ecosur-qroo.mx

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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Dear all,
About inshore-offshore changes in density, calcification rate and extension
rate in Montastraea annularis skeletons we observed that, as corals
experience a harsher environment, they respond by extending their skeletons
more using the same or less calcium carbonate (lower calcification rate),
with a concomitant reduction on skeletal density (the same as Bernard for
massive Porites). For more information, you can see Carricart-Ganivet
and Merino. 2001. Growth responses of the reef-building coral Montastraea
annularis along a gradient of continental influence in the southern
Gulf of Mexico. Bull. Mar. Sci. 68(1): 145.
Please, if you reply this message, send me a copy &lt;jpcarri at ecosur-qroo.mx>,
since I&acute;m not in the list (my wife forwarded me the original message).
Best wishes,
Juan Pablo
 &nbsp;
<blockquote TYPE=CITE>Subject: Re: Nearshore vs. offshore bleaching
 Date: Fri, 18 May 2001 12:42:01 -0300
 From: Bernard THOMASSIN &lt;Bernard.Thomassin at com.univ-mrs.fr>
 To: debimack at auracom.com, coral-list at coral.aoml.noaa.gov
>Debbie and all interested colleagues
>Taking in account my remark :
 > >In fact coastal populations of corals (for the same species) are
more
 >resistant to all the possible stresses that coral populations living
in
 >more stable and constant seawater conditions.
 > >
You say :
>(The same is clearly true for our groundfish stocks, their resiliency
to
 >various stressors, i.e. fishing pressure and climate change, is much
higher
 >when they are located nearer to outflows of major rivers or mainland
 >shorelines. So is their growth rates, this is well documented...the
 >connection to enhanced feeding opportunities is rather hard to deny.)
 >
 >
 >About growth rates from massive corals (Porites lutea, and P.
 >lobata) our idea is supported also by results about the coral
 >calcification from Mayotte I. and SW Madagascar area (Tulear), both
 >sites being in the Mozambique Channel but separated by about 10
 >latitudinal degrees (13&deg; S for Mayotte, 23&deg; S for Tulear region)
 >(results from Kathrin PRIESS thesis, see PRIESS et al., 1997 ;&nbsp;
from
 >TESTREEF Program with W.C. DULLO, L. MONTAGGIONI, T. EISENHAUER, G.
 >HEISS, etc..):
massive Porites living:
 - in "oceanic" waters on outer barrier reef slopes, or near large
 passages, growth more quickly but with a less dense skeleton,
 - those living in coastal "neritic" waters grow more slowly but with
 a more dense skeleton than the first.
Unfortunatly we have not yet results for the metabolism rates and
 feeding rates.
Interesting debate you opened. this is Science.
Cheers,
Bernard
Bernard A. THOMASSIN
 Dir. recherches CNRS
 Centre d'Oc&eacute;anologie de Marseille,
 Station marine d'Endoume,
 Chemin de la batterie des Lions,
 13007 Marseille,
 France
 &amp;
 G.I.S. "LAG-MAY"
 "Environnement marin &amp; littoral de
 l'&icirc;le de Mayotte"
 t&eacute;l. (33) 04 91 04 16 17 (ligne directe)
 &nbsp;&nbsp;&nbsp;&nbsp; (33) 04 91 04 16 00 (standart)
 mobile (33) 06 63 14 91 78
 fax&nbsp; (33) 04 91 04 16 35 (&agrave; l'attention de....)
~~~~~~~
 For directions on subscribing and unsubscribing to coral-list or the
 digests, please visit www.coral.noaa.gov, click on Popular on the
 menu bar, then click on Coral-List Listserver.</blockquote>

<p>--
<br>&nbsp;
<br>&nbsp;
<p>*************************************************
<br>Dr. Juan P. Carricart-Ganivet
<br>El Colegio de la Frontera Sur
<br>Carretera Chetumal-Bacalar km 2, Zona Industrial No. 2
<br>Apdo. Postal 424. Chetumal, Q. Roo. 77000.
<br>M&Eacute;XICO
<p>Tel: (9) 8321666 ext. 286
<br>Fax: (9) 8320447 ext. 240
<br>E-mail: jpcarri at ecosur-qroo.mx
<br>&nbsp;</html>

--------------B3E18D0814A2AF276D310291--

~~~~~~~
For directions on subscribing and unsubscribing to coral-list or the
digests, please visit www.coral.noaa.gov, click on Popular on the
menu bar, then click on Coral-List Listserver.