Without even needing to read the article (will do it later if I get time) I can already say it still fits with what I said earlier. Many species of fish have the ability to change/alter their coloration based on their surroundings, some more so than others. Its basically a form of camouflage. Also, the different light spectrum found in various bulbs and types of lighting contributes to how their bodies process various vitamins and minerals, thus changes in their appearance/coloration happen. The same thing applies when you're working with light vs dark situations. The way the body processes various nutrients changes because organ functions are also affected by light vs dark as well as the various spectrum ranges. Some species are more affected by this than others. There is also a genetic link to some of these changes, which is why some species are more prone to these things than others. (angelfish vs guppy or crayfish vs shrimp) Other
things that can have effect on coloration are oxygen content, mineral content in the water supply, foods, and even temperature. There is a lot to factor into something like this. Do the same experiments with other species and you will see more change in some, less change in others.
If you think about it, people have the same ability to some degree. Take someone who spends more time in the sun vs someone who spends more time in the dark. Those who spend more time in the dark tend to have more pale skin, and this applies to any race, but is more noticeable in some than others. A person who is very light skinned is going to show this effect much more obviously than a person who has naturally dark skin or someone who is African American... but the changes are still there. Some people tan vs some who burn, vs some who only end up with darker freckles or even skin cancer...
The amount of light and type of light any animal is exposed to directly effects how their entire bodies function.
Dawn
Dawn Moneyhan
Aquatics Specialist/Nutritionist
To learn more about me go to
http://www.helium.com/users/449334
--- On Thu, 9/1/11, haecklers <haecklers@gmail.com> wrote:
From: haecklers <haecklers@gmail.com>
Subject: Re: [tropical fish club] Fish colors affected by light amounts
To: tropicalfishclub@yahoogroups.com
Date: Thursday, September 1, 2011, 4:28 PM
Dawn,
I completely understand what you are saying - my betta fish can look orange in one light and purple or green in another.
But the thing with the angelfish or crayfish is the actual color of their bodies changes over the course of months or if they were in certain lights since hatching.
Here's the link (but she talks about it in some of the other pages too): http://theangelfishsociety.org/articles/norton/dr_norton(10).htm
--- In tropicalfishclub@yahoogroups.com, Dawn Moneyhan <dawnshungryeyes4u2c@...> wrote:
>
> I agree, vitamin D is part of it... but when it comes to outdoors, so is the natural food supply. Nothing beats the color of a fish that is living on a natural wild food source along with water chemistry in a natural habitat, which also plays a huge role. Its not all just about the lighting.Â
> You can also see variations in color based on the type of light fixture & bulbs used over an aquarium, especially in saltwater. Many people who keep corals find themselves disappointed when they buy something new and beautiful at the store or online, only to get it home and find its a totally different color... its based on light intensity as well as spectrum. This applies to freshwater but isn't always as evident or obvious.
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> Dawn
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> Dawn Moneyhan
> Aquatics Specialist/Nutritionist
> To learn more about me go to
> http://www.helium.com/users/449334
>
>
>
> --- On Thu, 9/1/11, Diana Snyder <dianasnyder249@...> wrote:
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> From: Diana Snyder <dianasnyder249@...>
> Subject: Re: [tropical fish club] Fish colors affected by light amounts
> To: "tropicalfishclub@yahoogroups.com" <tropicalfishclub@yahoogroups.com>
> Date: Thursday, September 1, 2011, 2:23 PM
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> Vitamin D .lol Sorry that's very interresting.Really.Di
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> From: haecklers <haecklers@...>
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> To: tropicalfishclub@yahoogroups.com
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> Sent: Thursday, September 1, 2011 12:20 PM
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> Subject: [tropical fish club] Fish colors affected by light amounts
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> I was reading with interest last night the writings of Dr. Joanne Norton about how to get different color patterns in angelfish by raising them in darkness or only 4 or 8 hours of light, or constant light.
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> Some kinds of crayfish will become blue when raised in darkness.
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> Are there other kinds of fish that have different color patterns depending on the amount of light they are raised in?
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> I've heard that some gouramis get a lot more vivid colors when they are in sunlight (outdoors) and I've seen myself that bettas get richer colors when they are kept outdoors in the sun. Guppies also get some color enhancement from being outdoors, and they get a lot more active and alert.
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