Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/29601
Title: Various bone parameters are positively correlated with hen body weight while range access has no beneficial effect on tibia health of free-range layers
Contributor(s): Kolakshyapati, M  (author); Flavel, R J  (author)orcid ; Sibanda, T Z  (author); Schneider, D  (author)orcid ; Welch, M C  (author)orcid ; Ruhnke, I  (author)orcid 
Publication Date: 2019-12
Early Online Version: 2019-12-17
Open Access: Yes
DOI: 10.3382/ps/pez487
Handle Link: https://hdl.handle.net/1959.11/29601
Abstract: The aim of this study was to determine if body weight or range use has a significant impact on bone health in commercial free-range laying hens, and to correlate tibia bone quality parameters with individual range usage and body weight. A total of 30 Lohmann Brown hens at 74 wk of age were selected from a commercial free-range farm and were either classified as heavy (mean ± SEM body weight 2.11 ± 0.034 kg, n = 14) or light (1.68 ± 0.022 kg, n = 16) body weight, and also classified as rangers (accessed the range for 86.7% of available days, n = 16) or stayers (accessed the range for 5.00% of available days, n = 14). The left tibiae of all individuals were analyzed for morphological parameters using computed tomography, evaluated for bone breaking strength, and ashed to determine mineral composition. Keel bone scoring was performed based on observation. Data were analyzed using a 2 × 2 factorial ANOVA, and regression analysis was performed. There was no measurable effect of range usage on any of the tibia parameters investigated. The body weight was significantly correlated with tibia breaking strength (r = 0.59), tibia weight (r = 0.56), tibia length (r = 0.64), diaphyseal diameter (r = 0.61), and total tibia volume (r = 0.67). In conclusion, range access had no beneficial effect on bone health. The impact of internal hen house furnishing and movement on bone health needs further investigation.
Publication Type: Journal Article
Source of Publication: Poultry Science, 98(12), p. 6241-6250
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 1525-3171
0032-5791
Fields of Research (FoR) 2008: 070202 Animal Growth and Development
060801 Animal Behaviour
080110 Simulation and Modelling
Fields of Research (FoR) 2020: 300301 Animal growth and development
310901 Animal behaviour
460207 Modelling and simulation
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Socio-Economic Objective (SEO) 2020: 100411 Poultry
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science
School of Science and Technology

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This item is licensed under a Creative Commons License Creative Commons