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Boomer · 01-21-2004, 11:08 AM

mps

I believe I read Borneman (this isn't a citation, so I could be wrong ) that symbiotic algae could possibly provide up to 110% of a corals energy needs...

No that is not so, did you miss that in my above post. Some acro's can go even higher than that but that is ONLY when other such things as mucous production are left out, then it drops to below 100 %. The highest recorded **uncorrected** P:R value I have is 150 %. I don't know of any hard coral that gets 100 % from its zooxan's, at least not from any of my ref or tables.

Craig

A mislead on our part

They also feed on phyto's but zoo's out weigh photo's quite a bit. One coral Mopsella aurantia, a Gorgoanean, is an exception where 50 % is phyto's. In most cases bacterioplankton and DOM matter out weigh phyto's by far, zoo's are always at the highest % most of the time. Corals mostly fed on prey. Some corals such as Clavularia fed off their own zooxanthella, which they produce in excess for that reason. They actually stick their tentacles into the gastric cavity and extrude the zooxan's where they are digested and assimilated. Octocorals are very poor predators and Acyon's often don't display any "food reaction" at all, even in the presence of food. Xenia is another coral that does very, very little feeding of prey. These are about the only groups of corals, where it seems that with some species, there is no requirement or need of feeding, just "light feeding", the sun. I threw in these soft corals as the discussion seems to be on just hard corals, a dif issue for soft corals in general, when dealing with P:R Values and feeding habits.

01-21-2004, 11:08 AM	#64 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,204 View Gallery Karma Komment	mps I believe I read Borneman (this isn't a citation, so I could be wrong ) that symbiotic algae could possibly provide up to 110% of a corals energy needs... No that is not so, did you miss that in my above post. Some acro's can go even higher than that but that is ONLY when other such things as mucous production are left out, then it drops to below 100 %. The highest recorded uncorrected P:R value I have is 150 %. I don't know of any hard coral that gets 100 % from its zooxan's, at least not from any of my ref or tables. Craig A mislead on our part They also feed on phyto's but zoo's out weigh photo's quite a bit. One coral Mopsella aurantia, a Gorgoanean, is an exception where 50 % is phyto's. In most cases bacterioplankton and DOM matter out weigh phyto's by far, zoo's are always at the highest % most of the time. Corals mostly fed on prey. Some corals such as Clavularia fed off their own zooxanthella, which they produce in excess for that reason. They actually stick their tentacles into the gastric cavity and extrude the zooxan's where they are digested and assimilated. Octocorals are very poor predators and Acyon's often don't display any "food reaction" at all, even in the presence of food. Xenia is another coral that does very, very little feeding of prey. These are about the only groups of corals, where it seems that with some species, there is no requirement or need of feeding, just "light feeding", the sun. I threw in these soft corals as the discussion seems to be on just hard corals, a dif issue for soft corals in general, when dealing with P:R Values and feeding habits. __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be. Last edited by Boomer : 01-21-2004 at 11:20 AM.