HATCHERY PRACTICE:::MALFORMATION OF HATCHED CHICK

HEAD

MALFORMATION :EXPOSED BRAIN

Missing eyes,exposed brain,beak and face abnormalities.

possible cause:  high early incubation temperature or nutritional deficiencies.

ASSESSING FERTILITY:EXAMINATION OF FRESH UNINCUBATED EGGS (BREAKING OUT)..BLASTODERM :STEP 0NE

BREAKING OUT FRESH UN-INCUBATED EGGS

after fertilization,the eggs spends about a day travelling down the oviduct.during this time the number of cells in the blastoderm increases to about 60000.the characteristic organization of these cells just under the yolk sac membrane make it possible,with practice,to distinguish between an infertile blastodisc and a fertile blastoderm when breaking out fresh un incubated eggs.

EMBRYO LOSS DURING INCUBATION

Normal pattern of embryo losses during incubation

On x-axis there are days of incubation.

On y-axis there is probability of lossing embryo.