care during selection and storage of eggs

Care during selection and

storage of eggs

Egg collection Healthy, well managed parent flock.

Collection frequency 4-5 times daily.

Keep nest eggs separate from floor eggs.

Never incubate dirty eggs with clean eggs.

Hatching eggs should not be washed.

Should be discarded Dirty eggs.

Too large and small eggs.

Thin or cracked shell.

Loose or bubbly air cell.

Misshapen eggs

Fumigation Eggs and equipments.

Under fumigation does not kill bacteria.

Over fumigation can kill embryo.

Mixture of formalin & KMnO4 2:1.

Temperature 21.1°C.

Hatching egg storage

How to store eggs…… Neither embryo grows nor die.

Keep pointed end downwards.

Slanted at 30-45 ° angle.

Temperature15.6°C (physiological zero).

RH 70-80%.

Turn the eggs daily.

Effects of storage on eggs

1-2 days storage hatchability ↑.

As the storage time ↑ hatchability ↓.

Liquefaction of albumen & yolk.

Increase in pH of albumen & yolk.

cntd… 0.7% chance of linear disease for an extra storage day.

High temperature and low RH ↓ hatchability.

0 hatchability when storage exceeds up to 14 days.

How to reduce effect of storage

Store young maternal flock eggs.

↑1 hr of incubation with ↑ in storage day.

RH 70-80%.

Pre-warm at 22-25°C for 5-18 hr just prior incubation.

cntd… Pre-warm before storage at 37.5°C for 6 hrs.

RH 88% if storage time increased.

Storage temperature 3 days storage, temperature should be 18-21°C.

4-7 days storage temperature should be 15-18°C .

Beyond 7 days 10-12°C.

Points to kept in mind Turn the eggs daily it prevents the yolk touching the shell and injuring of

embryo.

Eggs should warm slowly before placed in the incubator.

Rapid warm cause moisture loss & disease problems.

Use warm water never use water which is cooler than egg.

Never soak eggs in water.

never store wet or damp eggs.