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dc.contributor.authorCasey-Trott TMen
dc.contributor.authorKorver DRen
dc.contributor.authorGuerin MTen
dc.contributor.authorSandilands Ven
dc.contributor.authorTorrey Sen
dc.contributor.authorWidowski TMen
dc.date.accessioned2017-11-20T11:32:41Z
dc.date.available2017-11-20T11:32:41Z
dc.date.issued2017
dc.identifier.citation96:8en
dc.identifier.issn0032-5791
dc.identifier.urihttps://doi.org/10.3382/ps/pex059
dc.identifier.urihttp://hdl.handle.net/11262/11341
dc.description.abstractIncreased load-bearing exercise improves bone quality characteristics in a variety of species, including laying hens. Providing increased opportunities for exercise during the pullet rearing phase, a period of substantial musculoskeletal growth, offers a proactive approach to reducing osteoporosis by improving bone composition. The main objective of this study was to determine whether differing opportunities for exercise during rearing influences pullet musculoskeletal characteristics. Two flock replicates of 588 Lohmann Selected Leghorn-Lite pullets were reared in either standard, conventional cages (Conv) or an aviary rearing system (Avi) from day-old chicks until 16 wk of age. The keel bone and the muscles and long bones of the wings and legs were collected at 16 wk to measure muscle growth differences between rearing treatments and quantify bone quality characteristics using quantitative computed tomography (QCT) and bone breaking strength (BBS) assessment. Keel bone characteristics and muscle weights were adjusted for BW and analyses for QCT and BBS included BW as a covariate. At 16 wk of age, rearing system had an effect on the majority of keel bone characteristics (P < 0.05). The length of the keel metasternum, caudal tip cartilage length, and the overall percentage of cartilage present on the keel at 16 wk was greater in the Avi pullets compared to the Conv pullets (P < 0.01). Wing and breast muscle weights of the Avi pullets were greater than the Conv pullets (P < 0.001), but leg muscle weights were greater in the Conv pullets (P = 0.026). Avi pullets had greater total bone density, total cross-sectional area, cortical cross-sectional area, total bone mineral content, and cortical bone mineral content than Conv pullets for the radius, humerus, and tibia (P < 0.001). Avi pullets had greater BBS compared to the Conv pullets for the radius, humerus, and tibia (P < 0.01). Increased opportunities for exercise offered by the aviary rearing system increased muscle and bone growth characteristics in pullets at 16 wk of age.en
dc.description.sponsorshipScottish Government RESAS Strategic Research Programme (WP6.3)en
dc.language.isoenen
dc.relation.isformatof14716en
dc.relation.ispartofPoultry Scienceen
dc.rightsCopyright © The Author 2017. Published by Oxford University Press on behalf of Poultry Science Association. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.
dc.rights.urihttp://creativecommons.org/licenses/bync/4.0/
dc.subjectExerciseen
dc.subjectKeel boneen
dc.subjectMusculoskeletal growthen
dc.subjectPulleten
dc.subjectRearing systemen
dc.titleOpportunities for exercise during pullet rearing, Part I: Effect on the musculoskeletal characteristics of pulletsen
dc.typeArticleen
dc.description.versionVersion of record
dc.extent.pageNumbers2509-2517en
rioxxterms.publicationdate2017-03-31
rioxxterms.typeJournal Article/Reviewen
dcterms.dateAccepted2017-02-25
refterms.accessExceptionNAen
refterms.dateDeposit2017-11-20
refterms.depositExceptionpublishedGoldOAen
refterms.panelUnspecifieden
refterms.technicalExceptionNAen
refterms.versionVoRen


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Copyright © The Author 2017.  Published by Oxford University Press on behalf of Poultry Science Association.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.
Except where otherwise noted, this item's license is described as Copyright © The Author 2017. Published by Oxford University Press on behalf of Poultry Science Association. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.