red lights for night?

[IslandCrow]

I think you guys are confusing cause and effect. A simple observation can never prove those things. You're all probably onto something, and you can debate it forever, but there are specific methods to testing these theories, and none of us have done any of them.

That said, there does seem to be a good deal of anecdotal evidence to say that many aquarium creatures show no significant reaction to red light. . .at least at the intensities we usually use. That's probably good enough for me to go get some red "moonlights".

 

[Lucky-rc]

<a href=showthread.php?s=&postid=11627882#post11627882 target=_blank>Originally posted</a> by IslandCrow
I think you guys are confusing cause and effect. A simple observation can never prove those things. You're all probably onto something, and you can debate it forever, but there are specific methods to testing these theories, and none of us have done any of them.

That said, there does seem to be a good deal of anecdotal evidence to say that many aquarium creatures show no significant reaction to red light. . .at least at the intensities we usually use. That's probably good enough for me to go get some red "moonlights".

Someone give this man a cookie Well stated.
If I were going to go with the red it would be under the same pretence. I'm sure all of us would for that matter.
So like Clint Eastwood said above Lets see some pic's I for one have never seen a reef moon lit reef?

Lucky

 

[m2434]

I can't say for sure about ALL reef fish and inverts, but there is much research on red light and other animals. The research is MUCH more than anacdotal and shows, in suficient intensity, many organismis, inlcuding some reef fish can see red light and other organisms, may not. There is less for research with regards to reef animals, but there is some. It can be said with certainty that SOME fishes and inverts can detect red light and others may not...

Here are a few examples from a VERY quick search

http://www.lifesci.ucsb.edu/~haddock/abstracts/Widder_Red_2005.pdf

Visual Biology of Hawaiian Coral Reef Fishes. III. Environmental Light and an Integrated Approach to the Ecology of Reef Fish Vision
N. J. Marshall, K. Jennings, W. N. McFarland, E. R. Loew, and G. S. Losey

Visual Biology of Hawaiian Coral Reef Fishes. II. Colors of Hawaiian Coral Reef Fish
N. J. Marshall, K. Jennings, W. N. McFarland, E. R. Loew, and G. S. Losey

The ecology of the visual pigments of snappers (Lutjanidae) on the Great Barrier Reef
J. N. Lythgoe, W. R. A. Muntz, J. C. Partridge , J. Shand and D. McB. Williams


Spectral Sensitivity of the Hawaiian Saddle Wrasse, Thalassoma duperrey, and Implications for Visually Mediated Behaviour on Coral Reefs
Barry K.L. Hawryshyn C.W.


Colour vision and visual ecology of the blue-spotted maskray, Dasyatis kuhlii
Susan M. Theiss , Thomas J. Lisney, Shaun P. Collin and Nathan S. Hart

 

[solid14th]

I don't know about fish but with humans red light does not dialate your pupils. that is why it is used in planetariums and in the dashbord displays of newer cars.

 

[ryan_paskadi]

some deep sea fish bioluminesce red light....go figure out why they would do that

 

[m2434]

<a href=showthread.php?s=&postid=11629979#post11629979 target=_blank>Originally posted</a> by solid14th
I don't know about fish but with humans red light does not dialate your pupils. that is why it is used in planetariums and in the dashbord displays of newer cars.

Again, this has nothing to do with the spectrum, just the energy of the photons. Maybe in reef terms, basically a red light bulb would provide less efficiency per watt - very low PAR value :lol: (not exactly, but close)

http://www-istp.gsfc.nasa.gov/Education/wenpart2.html

 

[m2434]

<a href=showthread.php?s=&postid=11630074#post11630074 target=_blank>Originally posted</a> by ryan_paskadi
some deep sea fish bioluminesce red light....go figure out why they would do that

There are two reasons

1: they are sensitive to red and their prey isn't.
2: their prey is sensitive to and attracted to red light.

Both do occur....

 

[ryan_paskadi]

Ya that is pretty obvious answer, but it was really one of those questions that doesn't need an answer.

The point I was trying to make is there are ocean critters that have red coloration, luminescence, and fluorescence. This is because that critter using the red, or some other critter can see it and respond to it.

The horse has been beaten and hopefully the debate is closed.

 

[m2434]

I've learned it's often best not to assume anything :lol:

 

[m2434]

<a href=showthread.php?s=&postid=11631900#post11631900 target=_blank>Originally posted</a> by ryan_paskadi

The horse has been beaten and hopefully the debate is closed.

+1

 

[ryanpal]

maybe some example pics would get this thread back on track ? ;]

 

[Roy G. Biv]

<a href=showthread.php?s=&postid=11631900#post11631900 target=_blank>Originally posted</a> by ryan_paskadi
The horse has been beaten and hopefully the debate is closed.

<a>Originally posted</a> by ryanpal
maybe some example pics would get this thread back on track ? ;]

Here ya go!!

Another??