Copyright © 2004 All rights reserved

         DERECHOS RESERVADOS

Text Box:     Melanins Part III
Text Box: Dispersed melanin - manifestation of melanin which forms a veil like effect over the lipochrome making it darker and altering  the visual ground color.

   AVIARIO PUERTO RICO

CARLOS DÁVILA

Text Box:  DISPERSED MELANIN
Text Box:   LIPOCHROME
Text Box:    SQUEMACHROME
The green color is a visual effect produced by the dispersed melanin over the yellow lipochrome
Text Box: FERTILIZATION - as long as copulation occurs at least 24 hours before the first egg is laid the probabilities for fertilization are good. The canary hen has the ability to store viable spermatozoa for a number of days.
Once the ovule has been fertilized cellular division and growth begins, later these cells segregate to form groups of cells with very specific functions.  Once the egg is laid cellular division is interrupted until the hen starts her incubation  period  which usually lasts up to 14 days.
Text Box: At the end of the first incubation day the embryo is practically complete. The neural crest is formed from which  the  different groups of cells will form and migrate and later go through the differentiation process  to form all the organs and systems, the   melanization process initiates. After various days of incubation the  Melanoblasts (precursors of melanocytes) migrate from the neural crest to form a pattern of migration which is genetically controlled and determines the concentration and localization of the melanocytes.
Text Box: NEURAL CREST - the melanoblasts  located here will migrate to form the distribution pattern of the melanocytes 
Text Box:     Distribution of Melanocytes
Text Box:   Feathers and the Melanization Process