Somewhat Rare Rescue

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Thanks for all the comments. This discussion of genetics is interesting. I would like to hear more about how this influences the jack dempseys more. If someone could provide an article link or thread that would be great. I didn't find one here already, so I think that would be cool to have. Also, so are there four color variations on jds then: basic, electric blue, gold, and albino? Is the albino also called pink at times?
 
Nice job on the save. Looking forward to seeing updates on the little guy as he heals and grows.
 
There are two color morphs, EBJD and the pink, also called gold. The normal coloration technically isn't a color morph, as it's the WT (Wild Type) color. I haven't seen an albino JD, but that would be a third, and different, morph from the pink/gold.

It's late and I just got off work, but genetically speaking animals don't lack or have an extra "color" gene, they have a mutation in their genetic sequence that turns off or on color production through several different pathways.

andyourblueblood said:
nope. it all has to do with tyrosinase some fish are t(+) and some are t(-) it has to do with copper affecting the melanin or something. hopefully some one will see this and elaborate further.
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You're kind of close but not really at all. How about not posting unless you know your facts? Bad information is worse than no information.

Here's a quote, as I'm not a pro at albinism

www.albinism.org said:
Recent research has used analysis of DNA, the chemical which encodes genetic information, to arrive at a more firm classification system for albinism. Type 1 albinism (also called tyrosinase-related albinism) is the type involving almost no pigmentation. Type 1 albinism results from a genetic defect in an enzyme called tyrosinase. This enzyme helps the body to change the amino acid tyrosine into pigment. (An amino acid is a "building block" of protein, and comes from protein in the diet.) Type 2, a type with slight pigmentation, results from a defect in a different gene called the "P" gene.
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bigspizz said:
They are different. Xanthic/leucistic are without "all" color genes. Gold/and EBJD's are without "a" color gene not "all"......
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Correct for leucism, not xanthism. Gold JD's = leucistic. It should read something like

fixed bigspizz said:
They are different. Leucistic are without "all" color genes. Xanthic/and EBJD's are with "an" extra color gene......
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Leucism is a general term for the phenotype resulting from defects in pigment cell differentiation and/or migration from the neural crest to skin, hair or feathers during development. This results in either the entire surface (if all pigment cells fail to develop) or patches of body surface (if only a subset are defective) having a lack of cells capable of making pigment.

Since all pigment cell-types differentiate from the same multipotent precursor cell-type, leucism can cause the reduction in all types of pigment. This is in contrast to albinism, for which leucism is often mistaken. Albinism results in the reduction of melanin production only, though the melanocyte (or melanophore) is still present. Thus in species that have other pigment cell-types, for example xanthophores, albinos are not entirely white, but instead display a pale yellow colour.

A further difference between albinism and leucism is in eye colour. Due to the lack of melanin production in both the retinal pigmented epithelium (RPE) and iris, albinos typically have red eyes due to the underlying blood vessels showing through. In contrast, leucistic animals have normally coloured eyes. This is because the melanocytes of the RPE are not derived from the neural crest, instead an outpouching of the neural tube generates the optic cup which, in turn, forms the retina. As these cells are from an independent developmental origin, they are typically unaffected by the genetic cause of leucism.
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Xanthism is different than albinism and leucism, which is where you have an excess of yellow pigmentation. Similar with the EBJD (excess of pigment, not a lack).

So, to conclude, the gold/pink JD is a form of leucism, not albinism or xanthism.

The common pink cons are leucistic. The jag formerly owned by bolty is xanthic (see the difference? Pale (lacking all color) vs. yellow (lacking all but yellow))

This is probably too much information for most, but if you actually read it all and have any questions, feel free to ask. I love genetics.
 
Modest_Man;1258073; said:
There are two color morphs, EBJD and the pink, also called gold. The normal coloration technically isn't a color morph, as it's the WT (Wild Type) color. I haven't seen an albino JD, but that would be a third, and different, morph from the pink/gold.

It's late and I just got off work, but genetically speaking animals don't lack or have an extra "color" gene, they have a mutation in their genetic sequence that turns off or on color production through several different pathways.



You're kind of close but not really at all. How about not posting unless you know your facts? Bad information is worse than no information.

Here's a quote, as I'm not a pro at albinism





Correct for leucism, not xanthism. Gold JD's = leucistic. It should read something like





Xanthism is different than albinism and leucism, which is where you have an excess of yellow pigmentation. Similar with the EBJD (excess of pigment, not a lack).

So, to conclude, the gold/pink JD is a form of leucism, not albinism or xanthism.

The common pink cons are leucistic. The jag formerly owned by bolty is xanthic (see the difference? Pale (lacking all color) vs. yellow (lacking all but yellow))

This is probably too much information for most, but if you actually read it all and have any questions, feel free to ask. I love genetics.
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I'm sorry I thought "recessive" meant less than normal? I will study more before I enter topics I need some fine tuning on...:)
 
Very informative, Modest man. Thankyou.

I have always had the understanding that these are all natural occuring colour morph's, which are veiwed as weekness in the wild and are therefore culled by the prospective parents. This is correct, yes?
 
In the wild most albino or "off" color morphs, especially when they grow slow like ebjd's, are indeed culled, preyed upon what have you. In the home aquarium, they are often times culled due to being runts because they grow slower than normal jd's.
 
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