Evidence of genetic variability for floor and nest egg laying behavior in floor pens.

摘要: We can define animal welfare by different parameters such as birds’ health, behavior or production. Due to new regulations, alternative management systems cage free environments has becoming a common practice in egg There are few introduced the layer industry. It is clear that cost of production much higher because high number downgrade eggs (Appleby et al., 2002, Gueston and Faure, 2004). Studies addressing side problem densities, effect rearing factors, nest types Gunnarsson 1999, Guesdon Cooper Appleby (1996) were first who studied individual bird differences on floor laid behavior, showed incidence declines with age.