Question about zoox and fluorescence pigment

[7thheaven]

Hi all

I am not sure but I know mainly there are two types that live in SPS...
zoox and fluorescence pigment
Zoox lives shallow(?)(not deep) place than fluorescence pigment so
if Zoox are so many we can not see the fluorescence pigment. That is why
coral has brown color..

If we use spur2, old zoox are gone..and I found if I use spur2, the coral color
is lighter...(some sps color is almost white) but I can not see the fluorescence pigment...

I wanna know why I can not see fluorescence pigment...

spur2 removes fluorescence too? or other reason? original color of pigment is
white?

[7thheaven]

anyone?

I am little worried I think I didn't express my question you could not understand it
b/c my poor English

[mesocosm]

Greetings All !

I am little worried I think I didn't express my question you could not understand it ...

Hehe ... I have the same problem myself ...

I am not sure but I know mainly there are two types that live in SPS...
zoox and fluorescence pigment ...

What exactly do you mean by "fluorescence pigment"?

TIA ...

[7thheaven]

Thanks mesocosm..
I am not sure the exact terms..but I wanna express fluorescence pigment means that the colorful cell(?) that SPS have.
Their original color...

I heard they are located deeper than the zoox that live in SPS...

still different express the what I wanna know....

Greetings All !



Hehe ... I have the same problem myself ...


What exactly do you mean by "fluorescence pigment"?

TIA ...

[bogg]

Depending on the condition and health of the coral will affect the outcome of the spur2. It shows the layer underneath the exsisting layer. Once all the colors are good by continue usage of the zeo products, I would then use the spur to lighten and brighten exsisting colors. IMO.

[7thheaven]

In my country...Most SPS are imported directly in other countries...fiji,Indonesia,singapore etc..
(Frag is not common)
They have original color at that time, but it becomes brown SPS...
I thought zoox are increased in many reasons (acclimation,not good water quality..etc)
then cover and hide SPS's original color..so If I use spur2,the zoox are removed ->peel off
-> their original colors are shown!!! but It it not..
When the zoox are increased, their original color are lost too?
Where are original color of them?

[mesocosm]

Greetings All !

Thanks mesocosm..
I am not sure the exact terms..but I wanna express fluorescence pigment means that the colorful cell(?) that SPS have.
Their original color...

I heard they are located deeper than the zoox that live in SPS...

still different express the what I wanna know....

... When the zoox are increased, their original color are lost too?
Where are original color of them?

Ahhh ... I'm with you now

Remember that the "color" we perceive in our corals results from the interaction of several things ... the "main" things being zooxanthellae, tissue pigmentation, coral skeletal pigmentation (if present), light (... with its various characteristics ... but that's another discussion entirely ...), and our eyes.

(Note: There's more to it, of course ... light waves do interesting things as they "get bent" ... coral skeletal structure (geometry & density), coral surface microlayer (CSM) characteristics, mucal layer(s) on the coral, indeed, the coral holobiont (a collective term referring to everything living on the coral colony including zooxanthellae and bacteria) are all involved ... not to mention the various spectral/chemical characteristics of the water, and organisms within the water column. But let's keep it simple, yes? Once the "hyper-details" begin to be applied, I find myself easily getting lost.)


As a generalized concept, Borneman says it pretty well ...

"The tissue of corals contain numerous pigment types that are partly responsible for their colors . (Other colors are related to zooxanthellae and light, ... .) ... Pigments create color via absorption, reflection, or diffraction of light. The color of corals is also modified under various conditions of tissue opacity and our own visual perception of them." (Borneman, 2001.)


As to fluorescent pigments ...

"MAAs [mycosporine-like amino acids] are very efficient at blocking UV radiation, yet remain largely transparent to near-UV-a radiation, which the corals use for photosynthesis by producing blue, cyan, green, and yellow fluorescent pigments. These pigments, present in coral polyp tissue, and likely to have a photosynthetic role, are UV-reflecting and fluorescencing pigments. These compounds are responsible for so many of the blue, green, and pink fluorescent colors found in so many corals of the reef. They do not seem to be part of the normal photosynthetic machinery, but rather dwell in the coral animal's epidermal cells in spherical granules, at least in some species studied. Fluorescent pigments are part of he chemical groups known as flavines, urobilines and pterines. ... Both MAAs and fluoresencing proteins, being localized in animal tissue, persist after bleaching events. They are found in the epidermal cells, rather than the gastrodermis where the zooxanthellae are found."

Extracted from:
Aquarium Corals. Selection, Husbandry, and Natural History.
2001, Eric H. Borneman, TFH Publications, Inc., PP 53-54.

Just 'cause I'm wandering doesn't mean I'm lost ...

Where are original color of them?

Water chemistry, water turbidity, coral holobiont, and "our eyes" aside, the factors which produce the "original color" are located in a succession of layers ... the mucus layer(s), epidermis, mesoglea, gastrodermis, and skeleton (if present).

When the zoox are increased, their original color are lost too?

I don't think of the non-zooxanthellae pigments as being lost (as in "gone", or expelled), but rather as being obscured/masked. Indeed, the "restoration" of "original" coloration after a decrease in zooxanthellae density indicates to me that the non-zooxanthellae pigments are retained.


On a slightly different tangent ...



Are the "color bands" shown above all zooxanthellae, or all pigments? I submit that it's a combination of both. But it gets more interesting ... given that the zooxanthellae are typically localized in the tissue layer below the epidermis where a significant number of non-zooxanthellae pigments are localized ... just what is it we're actually looking at?

Hehe ... just a "simple" question ...


HTH ...

[7thheaven]

I can not understand 100% exactly..sorry for that...

you mean...the real color is combination of zoox + non-zooxanthellae pigments ?

Could you explain about this more easily?

you know... I am foreigner.. hehe..

Thanks...