الفهرس 
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Abstract
This study was conducted at the research farm that belongs to faculty of veterinary medicine, Zagazig University. Four experiments were designed to investigate the effect of some managerial factors on the behaviour and performance of duck.
III- The first experiment:
The effect of different housing systems and breeds on behaviour and performance of duck
In this experiment, a total number of 144 ducklings represent three different genotype of duck, Pekin, Muscovy, and Moulard duck (cross between female Pekin and Muscovy male). 48 ducklings (3 weeks of age) from each genotype were used and divided randomly into two groups (1st group, deep litter and 2nd group, caged group). The obtained results were as the following:
1- Muscovy duck exhibited significantly increase in feeding and forging behaviour (time and frequency).
2- Standing and walking were higher in Moulard than other breeds with no significance difference. While resting and pecking behaviour was significantly higher in Muscovy duck.
3- Moulard and Muscovy ducks had much body weight and body weight gain than pekin ducks.
4- Feeding behaviour (327.64±31.68 Sec) was improvedin cage than litter system 431.61±31.68 Sec). Also, standing frequency and walking behaviour were significantly increased in litter than cage systems.
5- Preening and feather pecking were increased in Muscovy duck although the differences not significant.
6- Body weight was relatively higher in deep litter than cage system. as well as feed intake was higher in litter housed duck during the 4th and 6th week compared to cage housed ducks which had higher feed intake in 7th, 8th and 9th week.