I have a 10 gallon tank intended to hold 6 danios. we started the tank with three regular zebra danios And once it was cycled intended to add neon danios. However I keep having the neon danios die on me. all three original zebra danios are doing swimmingly. they are in perfect health, they eat well they interact well with no significant aggression and seem to be doing very well. my neon danios are not doing well. most often they do not survive more than a day or two after being introduced to the tank. meanwhile the normal zebra danios continue to do fine. I have lost count of how many dead neon danios I have returned to the store. Is there something I'm doing wrong or are neon / GloFish danios just more fragile? should I give up?
Glofish danios: are they more disease prone?
- Thread starter Suzisuzisuzi
- Start date
I was told by someone that they were produced in a lab and that coral dna
was used to develop the glowing neon color.
I attended a talk by one of the biologists first working on commercial glow-fish.
Genes from naturally bioluminescent sea creatures (jellyfish? dinoflagellate?? don't remember which) were inserted into danios cells, and thru selective breeding over time," fixed", according to the biologist assigned to the project.
It took millions and millions of danios to get an actual small breeding group to breed true, to be able to pass on the bioluminescent gene to progeny.
Favoring and the selection process to get a gene for color, or in this case bioluminescence, often favors that gene at the expense of other genes that might favor immunity, or robustness (these of course are not obvious).
A good example might be the difference of the EBJD, where compared to a normal JDs, the wild or normal are much more robust, even more aggressive, evolved thru survival of the fittest, the gauntlet of nature, to be able to cope with general life better than, the generally weak line bred blue variety in aquariums, where little outside pressure was provided to keep weak and subpar individuals from reproducing, and profit preferring quantity over quality may be the impetus.
Nature always favors the fittest to carry on the species, and the weak are weeded out, whereas man often overlooks that important part of the equation, in favor of simple outward appearance.
Genes from naturally bioluminescent sea creatures (jellyfish? dinoflagellate?? don't remember which) were inserted into danios cells, and thru selective breeding over time," fixed", according to the biologist assigned to the project.
It took millions and millions of danios to get an actual small breeding group to breed true, to be able to pass on the bioluminescent gene to progeny.
Favoring and the selection process to get a gene for color, or in this case bioluminescence, often favors that gene at the expense of other genes that might favor immunity, or robustness (these of course are not obvious).
A good example might be the difference of the EBJD, where compared to a normal JDs, the wild or normal are much more robust, even more aggressive, evolved thru survival of the fittest, the gauntlet of nature, to be able to cope with general life better than, the generally weak line bred blue variety in aquariums, where little outside pressure was provided to keep weak and subpar individuals from reproducing, and profit preferring quantity over quality may be the impetus.
Nature always favors the fittest to carry on the species, and the weak are weeded out, whereas man often overlooks that important part of the equation, in favor of simple outward appearance.
That is true. Or jelly fish. Red is from coral for sure. I went to the website. So the coral/jelly florescent DNA was/is attached to the fishes dna and then they grow up and breed. Some of them throw regular babies and ones that have the marker. They then bred the marker to marker and start to get ones with just marker, so you do get some in breeding and since its such a hot thing right now I'm sure they are more inbred now then before. They mix new blood in or should every few generations I think males only "noncolored" as I think its the females that determine the gene is passed or not. If you put in a non colored female you'll get non colored babies. Ive seen recently the ones at petsmart with the bent spine issues danios get from too much inbreeding too.