New/Different types of Cardinal Tetras?

[sammajor]

bought a few pcs from colourful aquarium. The body was wider and nicer in term of colour. But quite expensive.


Cheers,

[vincentlii]

Will these cardinals bite CRS?

[Quixotic]

Anyone has close-up and good images of the "new" cardinal tetra? If possible, please post an image of the "normal" cardinal tetra for comparison as well.

Curious after reading something interesting.

[ranmasatome]

what is it?? post leh..

[Quixotic]

http://www.practicalfishkeeping.co.u....php?news=1009

1. Somebody is not going to like this but the Czechs have produced an aquarium strain of Paracheirodon axelrodi, selectively-bred Cardinal tetra which is gold and red in colour.

2. The difference between the Rio Negro and Rio Orinoco population is not the size. The phenotype found in the Rio Negro has a metallic blue stripe reaching the adipose fin, while the form found in the Rio Orinoco drainage has a metallic blue stripe which stops between the dorsal and the posterior end of the adipose.

So, need some visuals of this "new" fatter and shorter cardinal and see it is all about.

3. Cardinal tetra exists as a number of phenotypes in the wild, including in the Rio Negro a gold form in which the blue stripe is replaced by yellow and a "silvery blonde" form where the entire dorsal surface and blue stripe is pale silver-blue in colour. Research has shown that the Cardinal tetra exists in several different natural colour forms in the Amazon basin, some of which could later be described as distinct species. *drool*

[xxdivinityxx]

I think there is no difference. Except that because of the broader body, the red seems more then the common ones.

Guys, i founds right under our very noses.

http://www.aquaticquotient.com/forum...ad.php?t=22948

[Real Cichlid]

Are those posted by ApistoWorld the same as the ones produced by Dr.Karel?
I was told that there are indeed wild populations of the Platinum variation which were culled by the exporters from South America on demand and are a whole lot more expensive than the regular ones. There's probably 1 in a 100.

[hwchoy]

it is still currently generally accepted that most "platinum" forms of characins are normal fishes infected with a skin parasite causing guanine to be produced and covering the infected areas, appearing as a silvery shield.

Now this doesn't mean that ALL platinum forms are parasite-induced. However whenever possible if a really close-up pix of the fish can be taken, to examine the surface texture of the scales to see if there appear to be a covering layer over the scales, or whether the scales can still be discerned.

[hwchoy]

this Dr. Karel is also active in one of our local forum petfrd.com

I support the identification of natural geographical colour/pattern populations, but does not support the selective breeding of any particular colour strains. As the good Dr. Karel stated himself, the fries and more sensitive and slower-growing. There is a good reason why such strains are not more common in the wild, this is the essence of Evolution, Survival of the Fittest.

[Real Cichlid]

Thanks Choy for the clarification. By the way, what's guanine?

[hwchoy]

I forgot to mention, I will also gladly pay extra for the rarer natural forms, and I hope this translates to extra income for the amazonian fishermen.

I absolutely will pay nothing, zilch, for a selectively bred "natural strain".

[hwchoy]

Thanks Choy for the clarification. By the way, what's guanine?

time to install the google button on your browser huh?

anyway remember your genetics? the four bases (A, T, C, G) that forms the DNA in everyone of your cells. One of them is Guanine (guess which one )

here's the wikipedia entry http://en.wikipedia.org/wiki/Guanine
look at the bottom "Other Uses" where it says guanine crystals gives a shiny irridescent effect.

[Real Cichlid]

I googled it and could not make up what they wrote in wikipedia. So I thought you'd have a better "layman" explanation.

[hwchoy]

ok, it is a chemical compound, found throughout the cells in your body. when it forms a crystal, it is "kim kim" in colour one. so when the fish produce this crystal form of guanine on the skin, then it look like "kim kim" colour and people call it Platinum this and that loh.

?

[Real Cichlid]

ok, it is a chemical compound, found throughout the cells in your body. when it forms a crystal, it is "kim kim" in colour one. so when the fish produce this crystal form of guanine on the skin, then it look like "kim kim" colour and people call it Platinum this and that loh.

?

Now that's what I call a real layman's explanation. Thank you, Thank you.