期刊
CIENCIA RURAL
卷 38, 期 7, 页码 1997-2003出版社
UNIV FEDERAL SANTA MARIA
DOI: 10.1590/S0103-84782008000700031
关键词
behavior; dust-bath; welfare; nest; perches
类别
资金
- Ministry of Science and Technology of Spain [AGF97-0932, PETRI PTR 1995 0449-OP]
- Zucami Poultry Equipment Company
- Spanish Association of Egg Producers (INPROVO)
- Ministry of Agriculture & Fisheries of Spain
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) from Brazil
The influences of floor and cage-rearing on behavioural adaptation to,furnished cages were investigated in laying hens. Two groups of 180 Isa Brown commercial layer pallets were reared in cages (CR) or floor pens (FR) and transferred to furnished cages, where their behavioural adaptation was observed throughout the laying period (18-78 wks of age). At 17 weeks of age, hens were placed in one of the 36 furnished cages with 10 birds in each cage, each containing 0 nest box, perches, a dust bath, and abrasive strips. At 50 and 54 weeks of age, direct visual observation and video recording were used to assess hens behaviour Front 21 weeks of age, the dust-bath activities of leg-banded hens in eight cages per treatment were recorded. The amount of time spent walking was higher (3.5% vs. 1.8%) and perching was lower (7.5% vs. 13.4%) in CR hens than in FR hens (P<0.05). The use of dust baths and dust bathing behaviour increased throughout the laying period. The proportion of hens present at the sand bath area increased from 9.2% at 21 weeks to 21.4% at 72 weeks and the proportion of hens dust bathing increased from 4.7% to 21.0% (P<0.05). At 72 weeks of age, all dust-bath parameters were higher (P<0.05) in FR hens than in CR hens.
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