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Total leucism .... Partial leucism ....Pale leucism .....Partial Pale leucism ?

Discussion in 'Peafowl' started by Dany12, Jan 7, 2013.

  1. Dany12

    Dany12 Chillin' With My Peeps

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    Aug 20, 2011
    Hungary
    From :
    "Sticky" topics index ..... genetics " :


    " Mechanics of the 'White' Color and Pied Pattern
    White and Pied birds are NOT albinos or partial albinos (ok, they are not USUALLY. An albino peafowl would be white, but a white peafowl is not typically an albino). "

    White wild peacocks in India .... but we will never know if they are total leucism birds or albino (even when there is this possibility!).
    In Bhiwani ( India ).
    http://www.indianwildlifeclub.com/ezine/whitePeacock.jpg
    In Ramanashramam (India ).
    http://gkamesh.files.wordpress.com/2008/09/white-peacock.jpg

    Partial leucism in wild Sri Lanka :


    [​IMG]


    " Albinism is the absence of melanin production in the body and applies ONLY to birds who fail to produce melanin. A partial albino is a creature who has other forms of pigmentation (for example, carotenoids) and may still display some color. Albinos will lack color in their skin and eyes, not just their feathers.

    Leucism, on the other hand, is a failure to properly deposit pigment (all pigments) on the feathers due to the failure of pigment cells to move to their proper location on the body from the neural crest. Leucism affects only the feathers of the bird, leaving the skin and eyes normal colored. Partial leucism results in the pied coloration (in any bird, not just peafowl. Wild pied or piebald birds can be found, but are very rare and usually are killed quickly by predators or do not get to breed because they don't look right). Total leucism can result in a completely white bird, which is how we have white peafowl.

    Pale leucism can affect part or all of a bird, resulting in washed out plumage instead of totally white plumage. "

    Pale leucism birds :
    http://4.bp.blogspot.com/-4-jLlCJ1qKU/ULTmunnT9jI/AAAAAAAALpQ/4l20Iz2CvvU/s1600/Three+Hens.jpg
    http://www.photosension.com/foto-galleri-billede/public/leucistic-gentoo-penguin-20030117-8012.jpg
    http://0.tqn.com/d/birding/1/0/g/A/-/-/leumagpie.jpg

    "A white bird cannot also be a pied bird, as the pied gene is an allele for the white gene. A bird cannot be both a partial leucistic bird (pied) and a total leucistic bird (white) at the same time. It is also true that a total leucistic bird will never revert to partial leucism, meaning a white bird will never create a pied bird offspring. "


    I have two questions:
    Indian blue peacock Opal would not be a pale leucism of IB?
    Indian blue peacock silverpied would not be the pale partial leucism of IB?
     
  2. Arbor

    Arbor Chillin' With My Peeps

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    I think, judging by your example pictures, that Cameo would be more of a pale leucism. I consider opal to be an oddball mutation, given the shape of the eye in the feather does not match that of any of the other colours. Silver pied, as we have so far come to understand is the combining of the pied, white and white eyed genes. This may mean partial leucism on more than one level (the pied and the white eyed), but not the pale leucism.
     
  3. 1muttsfan

    1muttsfan Overrun With Chickens

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    Upper Peninsula Michigan
    Partial albino is a misnomer, people do use it to describe partially white animals but the definition of albino is "A person or animal having a congenital absence of pigment in the skin and hair (which are white) and the eyes (typically pink)" or something similar to that. Either an animal is albino or it is not. Pied birds are not partially albino, although they are sometimes described that way - technically that is incorrect.
     
  4. Dany12

    Dany12 Chillin' With My Peeps

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    Aug 20, 2011
    Hungary
    At another place:
    " Wild pied or piebald birds can be found, but are very rare and usually are killed quickly by predators or do not get to breed because they don't look right). "

    Evidence by the picture ....


    [​IMG]


    The instinct of reproduction is greater than the color detail!
     

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