[Coral-List] Coral Polyps Rejecting/Ejecting Their Zooxanthellae
Thomas Goreau
goreau at bestweb.net
Thu Jan 31 17:24:14 EST 2008
Dunbar Steele and Nora Goreau found that degenerating and excess
zooxanthellae are often expelled rather than absorbed.
This fits with most coelenterates being obligate carnivores in diet,
even those with symbiotic algae. Sir Maurice Yonge pointed out in the
1920s Reports of the Cambridge University Great Barrier Reef
Expedition that corals spat out phytoplankton put in their gastric
cavity but gobbled up zooplankton. In addition corals have many other
heterotropic uptake pathways. For more on this see:
TF Goreau, 1956, A study of the biology and histochemistry of corals,
227 p., Yale University
TF Goreau, NI Goreau, and CM Yonge, 1971, Reef corals: autotrophs or
heterotrophs? Biol. Bull. 141:247-260
Thomas J. Goreau, PhD
President
Global Coral Reef Alliance
37 Pleasant Street, Cambridge MA 02139
617-864-4226
goreau at bestweb.net
http://www.globalcoral.org
On Jan 31, 2008, at 4:34 PM, James Cervino PhD. wrote:
> There was a great paper published by Roger Steele and Nora Goreau
> in 1977 that
> discusses "farming of the alga". Here is the citation.
>
> Steele, R.D. and N. Goreau, (1977). The breakdown of symbiotic
> zooxanthellae in
> the sea anemone Phyllactis (=Oulactis) flosculifera (Actiniara). J.
> Zool. Lond.
> 181: 421-437.
>
>
> *************************************
> Dr. James M. Cervino
> Pace University & Visiting Scientist
> Woods Hole Oceanographic Inst.
> Department of Marine Chemistry
> Woods Hole MA.
> Cell: 917-620*5287
> ************************************
>
>
> Quoting Melissa Keyes <mekvinga at yahoo.com>:
>
> * Hello, Listers,
> *
> * Do stressed Polyps eject their Zooxanthellae because the Zoox
> are dying or
> * have died, and are beginning to rot?
> *
> * Cheers,
> *
> * Melissa E. Keyes
> * Christiansted, St. Croix, USVI
> * Caribbean Sea
> *
> *
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