Opportunities for exercise during pullet rearing, Part I: Effect on the musculoskeletal characteristics of pullets

TM Casey-Trott, DR Korver, MT Guerin, V Sandilands, S Torrey, TM Widowski

Research output: Contribution to journalArticle

10 Citations (Scopus)
12 Downloads (Pure)

Abstract

Increased 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.
Original languageEnglish
Pages (from-to)2509 - 2517
Number of pages9
JournalPoultry Science
Volume96
Issue number8
Early online date31 Mar 2017
DOIs
Publication statusFirst published - 31 Mar 2017

Fingerprint

pullets
exercise
rearing
bones
cages
keel bone
muscles
aviaries
radius (bone)
humerus
tibia
computed tomography
cartilage
mineral content
legs
breast muscle
osteoporosis
bone density
laying hens
flocks

Bibliographical note

1023369

Keywords

  • Exercise
  • Keel bone
  • Musculoskeletal growth
  • Pullet
  • Rearing system

Cite this

Casey-Trott, TM ; Korver, DR ; Guerin, MT ; Sandilands, V ; Torrey, S ; Widowski, TM. / Opportunities for exercise during pullet rearing, Part I: Effect on the musculoskeletal characteristics of pullets. In: Poultry Science. 2017 ; Vol. 96, No. 8. pp. 2509 - 2517.
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Opportunities for exercise during pullet rearing, Part I: Effect on the musculoskeletal characteristics of pullets. / Casey-Trott, TM; Korver, DR; Guerin, MT; Sandilands, V; Torrey, S; Widowski, TM.

In: Poultry Science, Vol. 96, No. 8, 31.03.2017, p. 2509 - 2517.

Research output: Contribution to journalArticle

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AU - Casey-Trott, TM

AU - Korver, DR

AU - Guerin, MT

AU - Sandilands, V

AU - Torrey, S

AU - Widowski, TM

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KW - Exercise

KW - Keel bone

KW - Musculoskeletal growth

KW - Pullet

KW - Rearing system

U2 - 10.3382/ps/pex059

DO - 10.3382/ps/pex059

M3 - Article

VL - 96

SP - 2509

EP - 2517

JO - Poultry Science

JF - Poultry Science

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