Summary: Biology Of Domestic Animals
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1 Egg
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1.1.1 The function of the egg
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What starts at the ovum?
The reproduction process -
What is characteristic for oligolecithal egg cells?
Very little yolk -mammalian eggs -
What is characteristic for telolecithal egg cells?
The yolk fills the largest part of the cell and a small quantity of cytoplasm is collected at one pole - insects, fish, reptiles and birds -
What are animals that give birth to live young?
Viviparous -
1.1.2 Egg production
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To which species can the most global egg production be ascribed?
Chicken -
Which duck breed is best known for its laying capacity? And what is that capacity?
Khaki Campbell - 300 eggs per year. -
Where and when was the battery cage developed?
United States - 1960s -
What was possible as the battery cage came?
Mechanising and automating chicken farming for egg production. -
What happened to duck egg farming at the beginning of the 1960s?
Itdeclined sharply becauseof :- Declining supply of fresh fish
- Export problems due to Salmonella infections
- Environmental problems
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When were battery cages banned in the EU?
2012
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