A Descriptive Study of Keel Bone Fractures in Hens and Roosters from Four Non-Commercial Laying Breeds Housed in Furnished Cages

Animals

JensPeter Christensen¹  RandiOppermann Moe¹  KätheElise Kittelsen²  Ingrid Toftaker²  Guro Vasdal³  ToneBeate Hansen³ 

[1] Lorenveien 38, NO-0585 Oslo, Norway;Animalia—The Norwegian Meat and Poultry Research Centre;Faculty of Veterinary Medicine, NMBU—Norwegian University of Life Sciences, PO Box 8146 dep., NO-0033 Oslo, Norway;

关键词: keel bone fracture;    laying hen;    animal welfare;    poultry welfare;    gene preservation;   

DOI  :  10.3390/ani10112192

来源: DOAJ

【 摘 要 】

The presence of keel bone fractures (KBF) in laying hens has been documented and discussed by several authors, nevertheless the causative factors behind KBF remain uncertain. High prevalence of KBF have been reported in all commercial egg production systems, in different genetic lines and at different ages. Several of the proposed causal mechanisms behind KBF are linked to selection for efficient production. It is, therefore, of interest to explore whether less selected breeds have a lower occurrence of keel bone fractures compared to reports from highly selected, modern laying hen breeds. Thus, the aim of the current study was to investigate keel bones of hens from four non-commercial layer breeds. Birds were housed in furnished cages and keel bones examined at 30 and 63 weeks of age, using a portable x-ray equipment. The results from this descriptive study indicate a low prevalence of KBF at both ages in all four breeds, with only five KBF detected in 213 x-ray pictures taken from 126 birds. Of these, four of the KBF were observed in the most genetically selected breed, with an early onset of lay. None of the roosters examined exhibited KBF. The overall low numbers of KBF found indicate that genetic factors may be involved in KBF and, thus that selective breeding may help to reduce the susceptibility to KBF. Finally, this study highlights the importance of poultry conservation to secure genetic diversity, which may be an important resource in future selection schemes.

【 授权许可】

Unknown