Embryo Development Flashcards
What is incubation
Period in which the embryo is developed inside the egg until it hatches
How long does a chicken usually lay an egg
Every 24 hours
What may incubating and moulting cause
No eggs to be laid
How many eggs can a chicken lay per year
200-300
How long is the incubation period for pheasants
23-24 days
How long is the incubation period for ducks
28 days
How long is the incubation period for chickens
21 days
How long is the incubation period for barn owls
31 days
What does egg candling allow breeders to view
Embryo development
What can egg production be affected by
Photoperiods
Diet
Food availability
Health
Temperature
Moulting
What is photoperiod
Availability of light
What happens during photoperiods
Egg production is stimulated by light
Egg production will decrease when daylight hours are shorter
Egg production may stop in winter
What may breeders use to trick birds into producing eggs
Artificial light
Why do commercial chicken egg production systems use artificial light
Ensure chickens produce eggs all year round
What can some birds be tricked into
Producing a second clutch of eggs
When is the breeding season for pheasants
Over two to three week period between April and June
When is the breeding season for chickens
Produce fertilised eggs all year round
Less productive in winter months
When are eggs laid for ducks
Between mid March and end of July
When are eggs laid for owls
Between March and August
When is egg laying optimal in chickens
Between 11-26 degrees
What can higher or lower temperatures can reduce
Quality and rate of production of eggs
What can stop egg production
Food availability
Diet
Health
What are six other factors that can affect egg production
Breed
Housing
Husbundry
Age
Moulting
Weather
Commercial incubation
What is the temperature maintained at
37-39 degrees
