ERA

Download the full-sized PDF of Modification of beef quality through steer age at slaughter, breed cross and growth promotantsDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3H81N

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Roy Berg Kinsella Research Ranch

Collections

This file is in the following collections:

Journal Articles (Kinsella Ranch)

Modification of beef quality through steer age at slaughter, breed cross and growth promotants Open Access

Descriptions

Author or creator
Girard, I.
Aalhus, J. L.
Basarab, J. A.
Larsen, I. L.
Bruce., H. L.
Additional contributors
Subject/Keyword
growth implants
growth rate
beef
ractopamine
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
A 23 factorial experiment tested the interactions of slaughter age (12–13 or 18–20 mo), growth implants use (Component E-S, TE-S), ractopamine hydrochloride (RAC) feed supplementation use and breed cross [Hereford–Aberdeen Angus (HAA) or Charolais–Red Angus (CRA)] on pH, temperature, objective colour measurements, relative myoglobin states, sarcomere lengths, shear force, and water losses of m. semitendinosus (ST) and m. gluteus medius (GM) from 112 crossbred steers. In the ST, age affected objective colour measurements by increasing chroma and decreasing lightness (L*) and hue angle (P<0.05). Metmyoglobin (MMB) content of the ST also increased with steer age (P<0.05). In the GM, yearling-fed steers had greater MMB content than calf-fed steers, while hue angle varied the opposite way (P<0.05). Other variations in meat colour and myoglobin contents were more complex in the GM than the ST as they involved three-way interactions between the different treatments. Shear force and purge loss of the ST increased with implantation (P<0.05) with no change in sarcomere length (P>0.05). Shear force standard deviation was similar for breed crosses when yearling-fed but greatest for CRA breed cross when calf-fed (P<0.05). In both muscles, purge loss was increased by RAC supplementation (P<0.05). RAC supplementation did not affect sarcomere length and shear force in both muscles (P>0.10). In the GM, shear force increased with age and with CRA genetics (P<0.05). Results indicated that producers seeking to reduce beef toughness should consider using British crossbreds, exclude the use of hormonal implants and slaughter process steers at 12 to13 mo of age.
Date created
2012
DOI
doi:10.7939/R3H81N
License information
Rights
@2012 Girard, I., Aalhus, J. L., Basarab, J. A., Larsen, I. L., Bruce., H. L. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Girard, I., J.L. Aalhus, Basarab, J.A., I.L. Larsen and H.L. Bruce. (2012). Modification of beef quality through steer age at slaughter, breed cross and growth promotants. Can. J. Anim. Sci. 92(2), 175-188.  http://pubs.aic.ca/doi/full/10.4141/cjas2012-001

Source
Link to related item

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 487368
Last modified: 2016:06:24 18:53:21-06:00
Filename: cjas_92(2)
Original checksum: f8749efe7e4b1a5f4f0d692a10a7c1bb
Well formed: false
Valid: false
Status message: Invalid page dictionary object offset=486539
File title: Modification of beef quality through steer age at slaughter, breed cross and growth promotants
File author: I. Girard, J. L. Aalhus, J. A. Basarab, I. L. Larsen, H. L. Bruce
Activity of users you follow
User Activity Date