xanthic sh
- Thread starter cichlidinsomniac
- Start date
can someone verify it is a Xanthic channa? i don't think "Yellow" is close enough to compare to any deformity in color. this fish could eaisily be- albino or leucistic. And i don't know of any resident color deformity experts here, so i wouldn't bank on this being Xanthic. all different species of animalia have different color triats when being a deformed ungeneric color. albino fish can be more yellowish in appererence- this doesn't make them Xanthic. i beleive a Xanthic SH would be more rare and sell for alot more than an Albino, which still may serve a decent price.
are you just banking on this being a Xanthic fish, being that Mbunas Jag is Yellow? or Do you have some expertiece in Iding these sorts of fish that you'd like to share?
are you just banking on this being a Xanthic fish, being that Mbunas Jag is Yellow? or Do you have some expertiece in Iding these sorts of fish that you'd like to share?
maybe its some sort of albino Gachua , the body shape and color marking at end of fins.its from Indonesia rite.
wouldn't true albino have pink eyes , making this leucistic or Xanthic if a pattern appears ? , i certainly have no experience with color deficiency traits either , just wondering myself what the exact descriptions of each are ?
ok quick look in the dictionary comes up with :
Quick definitions (Xanthic)
(color) of a yellowish colour.
(a.) Of or pertaining to xanthic acid, or its compounds; xanthogenic.
(a.) Of or pertaining to xanthin.
(a.) Possessing, imparting, or producing a yellow color; as, xanthic acid.
(a.) Tending toward a yellow color, or to one of those colors, green being excepted, in which yellow is a constituent, as scarlet, orange, etc.
xanthic
a. yellow; yellowish. xanthochroid, n. & a. fair-haired and pale-skinned (person). xanthochroism, n. condition in which all skin pigments except yellow and orange disappear. xanthoma, n. skin disease causing yellow patches. xanthopsia, n. optical defect causing everything to seem yellow. xanthous, a. yellow- or red-haired; yellow-skinned
Leucism is a condition characterized by reduced pigmentation in animals. Unlike albinism, it is caused by a reduction in all types of skin pigment, not just melanin.
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.
More common than a complete absence of pigment cells is localized or incomplete hypopigmentation, resulting in irregular patches of white on an animal that otherwise has normal colouring and patterning. This partial leucism is known as a "pied" or "piebald" effect; and the ratio of white to normal-coloured skin can vary considerably not only between generations, but between different offspring from the same parents, and even between members of the same litter. This is notable in horses, the urban crow[1] and the ball python[2] but is also found in many other species. In contrast, albinism always affects the entire animal.
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.
albino (plural albinos or albinoes)
(countable) person or animal congenitally lacking melanin pigmentation in the skin, eyes, and hair or feathers (or more rarely only in the eyes);
Quick definitions (Xanthic)
(color) of a yellowish colour.
(a.) Of or pertaining to xanthic acid, or its compounds; xanthogenic.
(a.) Of or pertaining to xanthin.
(a.) Possessing, imparting, or producing a yellow color; as, xanthic acid.
(a.) Tending toward a yellow color, or to one of those colors, green being excepted, in which yellow is a constituent, as scarlet, orange, etc.
xanthic
a. yellow; yellowish. xanthochroid, n. & a. fair-haired and pale-skinned (person). xanthochroism, n. condition in which all skin pigments except yellow and orange disappear. xanthoma, n. skin disease causing yellow patches. xanthopsia, n. optical defect causing everything to seem yellow. xanthous, a. yellow- or red-haired; yellow-skinned
Leucism is a condition characterized by reduced pigmentation in animals. Unlike albinism, it is caused by a reduction in all types of skin pigment, not just melanin.
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.
More common than a complete absence of pigment cells is localized or incomplete hypopigmentation, resulting in irregular patches of white on an animal that otherwise has normal colouring and patterning. This partial leucism is known as a "pied" or "piebald" effect; and the ratio of white to normal-coloured skin can vary considerably not only between generations, but between different offspring from the same parents, and even between members of the same litter. This is notable in horses, the urban crow[1] and the ball python[2] but is also found in many other species. In contrast, albinism always affects the entire animal.
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.
albino (plural albinos or albinoes)
(countable) person or animal congenitally lacking melanin pigmentation in the skin, eyes, and hair or feathers (or more rarely only in the eyes);
so after reading that , i think this rules out any type of albino as the eyes are unafected, this leaves either Xanthic or Leucism , unfortunatly the info i can find on xanthic is very limited i will look further , into that part
further reading i find :
in albino animals the norm is for the eye color to lack pigment and show as pink
in xanthic animals the eye color is usually normal and unaffected
in Leucism animals the eye color is normally brown to gold
all three forms are regularly confused with each other
with this in mind , the channa in the auction would have Leucism
that is unless anyone want to share any info to the contra
in albino animals the norm is for the eye color to lack pigment and show as pink
in xanthic animals the eye color is usually normal and unaffected
in Leucism animals the eye color is normally brown to gold
all three forms are regularly confused with each other
with this in mind , the channa in the auction would have Leucism
that is unless anyone want to share any info to the contra
further reading : and a glossary of terms. -
Glossary of Genetic Terms
Genetics can be daunting to many individuals. We have tried to make this glossary as simple as possible. Please contact us if we have missed a term you are interested in, or the definitions are not as simple as they can be.
Albino - An animal with a genetic mutation where no melanin is produced.
Alleles - The different forms of a gene. A and a are different alleles of the gene that determines albinism. Alleles occupy the same locus, or position, on chromosomes.
Amelanistic - An animal with a genetic mutation where no melanin is produced. Same as Albino.
Anerythristic - A mutation showing reduced or no red color. Anerythristic snakes are generally black & white.
Axanthic - A mutation showing reduced or no yellow color.
Codominant - A mis-used term in the reptile world. The more correct term is incomplete dominant. It is when the heterozygous animal has a different, intermediate phenotype compared to the homozygous dominant or homozygous recessive individuals. A classic example of this is the Lesser Platinum mutation, where the heterozygous individual (Pp) is a Lesser Platinum, but the homozygous phenotype (PP) is Leucistic.
Dominant - A trait expressed preferentially over another trait.
Heterozygous - Differing alleles for a trait in an individual, such as Aa.
Homozygous - Both alleles for a trait are the same in an individual. They can be homozygous dominant (AA), or homozygous recessive (aa).
Hypomelanistic - An animal with reduced melanin.
Leucistic - A pure white snake with dark eyes. The homozygous phenotype of Lesser Platinum, Mojave and Fire mutations.
Melanin - Black skin pigments.
Melanistic - An animal with excessive melanin expressed - usually a black individual.
Mutation - A change in the DNA sequence of a gene to some new, heritable form.
Phenotype - The physical appearance of an organism with respect to a trait, i.e. normal (A) or albino (a) trait. The dominant trait is normally represented with a capital letter, and the recessive trait with the same lower case letter.
Punnett Square - A diagram designed by Reginald Punnett and used by biologists to determine the probability of an offspring having a particular genotype. It is made by comparing all the possible combinations of alleles from the mother with those from the father.
Recessive - The opposite of dominant. A trait that is preferentially masked by a dominant allele causing the phenotype to be expressed only in the homozygous recessive state (aa).
Tyrosinase - An enzyme required to synthesize the black pigment melanin.
Tyrosinase-negative - An albino whose cells lack tyrosinase, an enzyme necessary for melanin production. Tyrosinase-negative animals are albinos. This is the most common albino mutation.
Tyrosinase-positive - An albino animal which is capable of synthesizing tyrosinase, but not melanin. This indicates that there is another mutation in the melanin pathway, causing no melanin to be formed. This is a commonly mis-used term for any albino that is different in color. The only way to tell if an animal is tyrosinase-positive is to have a sample tested for enzymatic activity.
Wild-type - The non-mutant form of a gene, encoding the normal genetic function.
Xanthic - An animal possessing enhanced yellow color.
Glossary of Genetic Terms
Genetics can be daunting to many individuals. We have tried to make this glossary as simple as possible. Please contact us if we have missed a term you are interested in, or the definitions are not as simple as they can be.
Albino - An animal with a genetic mutation where no melanin is produced.
Alleles - The different forms of a gene. A and a are different alleles of the gene that determines albinism. Alleles occupy the same locus, or position, on chromosomes.
Amelanistic - An animal with a genetic mutation where no melanin is produced. Same as Albino.
Anerythristic - A mutation showing reduced or no red color. Anerythristic snakes are generally black & white.
Axanthic - A mutation showing reduced or no yellow color.
Codominant - A mis-used term in the reptile world. The more correct term is incomplete dominant. It is when the heterozygous animal has a different, intermediate phenotype compared to the homozygous dominant or homozygous recessive individuals. A classic example of this is the Lesser Platinum mutation, where the heterozygous individual (Pp) is a Lesser Platinum, but the homozygous phenotype (PP) is Leucistic.
Dominant - A trait expressed preferentially over another trait.
Heterozygous - Differing alleles for a trait in an individual, such as Aa.
Homozygous - Both alleles for a trait are the same in an individual. They can be homozygous dominant (AA), or homozygous recessive (aa).
Hypomelanistic - An animal with reduced melanin.
Leucistic - A pure white snake with dark eyes. The homozygous phenotype of Lesser Platinum, Mojave and Fire mutations.
Melanin - Black skin pigments.
Melanistic - An animal with excessive melanin expressed - usually a black individual.
Mutation - A change in the DNA sequence of a gene to some new, heritable form.
Phenotype - The physical appearance of an organism with respect to a trait, i.e. normal (A) or albino (a) trait. The dominant trait is normally represented with a capital letter, and the recessive trait with the same lower case letter.
Punnett Square - A diagram designed by Reginald Punnett and used by biologists to determine the probability of an offspring having a particular genotype. It is made by comparing all the possible combinations of alleles from the mother with those from the father.
Recessive - The opposite of dominant. A trait that is preferentially masked by a dominant allele causing the phenotype to be expressed only in the homozygous recessive state (aa).
Tyrosinase - An enzyme required to synthesize the black pigment melanin.
Tyrosinase-negative - An albino whose cells lack tyrosinase, an enzyme necessary for melanin production. Tyrosinase-negative animals are albinos. This is the most common albino mutation.
Tyrosinase-positive - An albino animal which is capable of synthesizing tyrosinase, but not melanin. This indicates that there is another mutation in the melanin pathway, causing no melanin to be formed. This is a commonly mis-used term for any albino that is different in color. The only way to tell if an animal is tyrosinase-positive is to have a sample tested for enzymatic activity.
Wild-type - The non-mutant form of a gene, encoding the normal genetic function.
Xanthic - An animal possessing enhanced yellow color.
