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| Gnan, Renate; Hirt, Helen; Zeltner, Esther. |
| Imitated natural light conditions during the artificial incubation may influence pullets' behaviour in being adapted to the diurnal rhythm. To study these effects, eggs were set in a commercial incubator either in the dark control or under full spectrum light tubes (Philips TL95, 36 watt). To imitate the light changes by a clucking hen, the eggs were exposed to light for twelve hours a day with a light-intensity of 20 lux. After six hours there was a step-up in light intensity to 1000 lux for 20 minutes. After hatching, the chickens were reared in paired groups under BIO SUISSE organic standards. Each group, containing 1000 pullets, was observed at the age of 2, 4, 8 and 10 weeks in 5 trials. Several categories of behaviour, activity and the diurnal rhythm... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Poultry; Health and welfare. |
| Ano: 2005 |
URL: http://orgprints.org/3619/1/3619.pdf |
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